Abstract

A green high viscosity toughness asphalt modifier includes following raw material components by weight: 70-232 parts of waste rubber and plastic mixture; 4-10 parts of nano-clay material; and 15-50 parts of compatilizer. A preparation method of the green high viscosity toughness asphalt modifier includes steps of (1) preparing masterbatch by a first melt blending extrusion, which includes weighing the nano-clay material, the waste rubber and plastic mixture and the compatilizer in accordance with a weight ratio of 1:(2-4):(1-2), mixing evenly at high speed, extruding and granulating for obtaining the masterbatch; and (2) performing a second melt blending extrusion, which includes mixing evenly the waste rubber and plastic mixture, the masterbatch obtained by the step (1) and the compatilizer with a weight ratio of (5-9):(1-5):(1-3) at high speed, extruding and granulating for obtaining the asphalt modifier.

IPC Classes  ?

• C08L 95/00 - Compositions of bituminous materials, e.g. asphalt, tar or pitch
• C08J 3/22 - Compounding polymers with additives, e.g. colouring using masterbatch techniques
• C08K 9/04 - Ingredients treated with organic substances
• C08L 17/00 - Compositions of reclaimed rubber
• C08L 23/06 - Polyethene
• C08L 23/12 - Polypropene

Abstract

Disclosed are a rubber particle-doped composite chip seal and a construction method thereof. The chip seal includes: a coarse aggregate in a lower layer, a fine aggregate in an upper layer, and an SBS-modified emulsified asphalt binding and encapsulating the coarse aggregate and the fine aggregate into a whole, wherein the coarse aggregate is a gravel having a particle size of 4.75 mm to 7.1 mm, the fine aggregate is rubber particles having a particle size of 1.18 mm to 4.75 mm after pre-treatment, and the fine aggregate has a doping amount of 30% to 45% of a volume of all aggregates.

IPC Classes  ?

• C08L 95/00 - Compositions of bituminous materials, e.g. asphalt, tar or pitch
• C08K 3/26 - CarbonatesBicarbonates
• E01C 19/48 - Machines, tools, or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface

Abstract

A pre-disintegrated soft rock embankment structure based on spatial function zones and a design method thereof are provided. The embankment structure includes an embankment shear control zone, an embankment settlement control zone, and an embankment shear-settlement control zone. The embankment shear control zone is a zone in which a shear failure ratio is greater than a predetermined value. The embankment settlement control zone is a filled zone right below a top surface of an embankment. The embankment shear-settlement control zone is an intersection of the embankment shear control zone and the embankment settlement control zone. The provided structure and method improve the shear strength, stability, and durability, reduce footprint, shorten a settlement duration after construction, and solve engineering problems such as low slope ratio and large deformation of an embankment due to a long period of subsequent disintegration in the prior art.

IPC Classes  ?

• E02D 17/20 - Securing of slopes or inclines
• E02D 17/18 - Making embankments

Abstract

The application relates to a method and a system for energy storage power station capacity multi-objective optimization configuration adapting to variable energy storage period: firstly, obtaining a load power curve and a conventional energy power generation output curve from a power dispatching system to obtain a new energy power generation net demand curve; then calculating the optimization configuration capacity of energy storage power stations in the energy storage period and the planning period duration; calculating the opportunity carbon costs and energy storage power station capacity investment costs under different energy storage power station capacities in the planning period duration, and constructing the opportunity carbon cost function and energy storage power station capacity investment cost function, so as to construct a multi-objective energy storage power station capacity optimization configuration model, and calculate a multi-objective Pareto optimization set.

IPC Classes  ?

• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy

Abstract

A stiffening girder erection method of a ground-anchored suspension bridge is provided. Clips for all hanger rods of a space main cable suspension bridge are installed such that design center lines of the clips are located in a vertical plane. A first stiffening girder section is installed at a position away from a first tower at a preset distance in a longitudinal direction. A second stiffening girder section is installed at a position away from a second tower at the preset distance along the longitudinal direction. A plurality of third stiffening girder sections are installed one by one in a direction respectively from the first stiffening girder and the second stiffening girder toward a mid-span until a mid-span closure is completed. An azimuth angle of a main cable around a central axis thereof at each of the clips is measured.

IPC Classes  ?

• E01D 11/02 - Suspension bridges
• E01D 21/00 - Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The present disclosure provides an oscillation suppression method for a low-carbon power system based on energy storage power stations. Firstly, constructing a power system oscillation suppression model; secondly, constructing a correlation table of the oscillation modes vs the energy storage stations and a correlation table among the damping controller parameters, a delay margin and a damping ratio; thirdly, based on a real time power system oscillation mode, searching for a matching oscillation mode and a oscillation control strategy from the oscillatory control strategy knowledge base that based on the energy storage power stations, and suppressing the power system oscillations based on the oscillation control strategy. Thus providing an effective method to the stable control of the power system, and solving a problem of power system oscillation suppression, which seriously affects the stable operation of the power system, in the coordinated scheduling of source network load storage.

IPC Classes  ?

• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H02J 3/28 - Arrangements for balancing the load in a network by storage of energy

Abstract

Provided are antenna arrays based on three-dimensional special-shaped wave-absorbing structures by the disclosure, and includes an antenna array fixing plate and a plurality of antenna array units, where the antenna array units are sequentially fixed on the antenna array fixing plate; each of the plurality of antenna array units includes an antenna transmitting channel, two antenna receiving channels and a pair of three-dimensional special-shaped wave-absorbing structures; the antenna transmitting channel is used for transmitting antenna signals; the antenna receiving channels are used for receiving the antenna signals; and the three-dimensional special-shaped wave-absorbing structures are used for isolating antenna signals of antenna transmitting channels of other antenna array units.

IPC Classes  ?

• H01Q 17/00 - Devices for absorbing waves radiated from an antenna Combinations of such devices with active antenna elements or systems
• H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure

Abstract

Disclosed is a three-dimensional special-shaped wave-absorbing structure-based antenna array, which comprises: an antenna array fixing plate and multiple antenna array units, wherein the multiple antenna array units are sequentially fixed on the antenna array fixing plate. Each antenna array unit comprises an antenna transmitting channel, two antenna receiving channels and a pair of three-dimensional special-shaped wave-absorbing structures. The antenna transmitting channels are used for transmitting antenna signals. The antenna receiving channels are used for receiving the antenna signals. The three-dimensional special-shaped wave-absorbing structures are used for blocking antenna signals of antenna transmitting channels of other antenna array units. In the present invention, bottom edge structures of the special-shaped wave-absorbing structures are parallel to a feed center connecting direction of a transmitting antenna and a receiving antenna, so as to increase an isolation degree between test channels of a ground penetrating radar, enhance a ringing artifact of time-domain antenna radiation of the ground penetrating radar, improve environment interference resistance capabilities of the ground penetrating radar in a high-speed detection state, and enhance a signal-to-noise ratio, thereby achieving accurate detection and recognition.

IPC Classes  ?

• H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
• H01Q 17/00 - Devices for absorbing waves radiated from an antenna Combinations of such devices with active antenna elements or systems

Abstract

A combined reinforcing device and method for achieving prestress self-tensioning and secondary regulation and control. The combined reinforcing device comprises: a tensioning assembly (10), an adjusting assembly (20), and a prestressing tendon assembly (30); the tensioning assembly (10) comprises first sliding rails (101), connecting rods (102), first inclined rods (104), and second inclined rods (105); first sliding blocks (103) are provided at two ends of each connecting rod (102), and are arranged on the first sliding rails (101); each first inclined rod (104) and each second inclined rod (105) are hinged in a crossed manner; one end of each first inclined rod (104) and one end of each second inclined rod (105) are both hinged to each connecting rod (102), and the other end of the first inclined rod and the other end of the second inclined rod are hinged to second sliding blocks (202); the adjusting assembly (20) comprises a second sliding rail (201), the second sliding blocks (202), and an adjusting rod (203); the adjusting rod (203) passes through one second sliding block (202) and is fixedly connected to the other second sliding block (202); the prestressing tendon assembly (30) comprises anchorage devices (301) and a prestressing tendon (302); the connecting rods (102) both are provided with the anchorage devices (301); and the prestressing tendon (302) sequentially passes through the connecting rod (102) on one side and a hole channel of the second sliding rail (201) through one anchorage device (301) and is finally anchored to the anchorage device (301) on the connecting rod (102) on the other side. According to the combined reinforcing device and method, self-tensioning and secondary regulation and control of the prestressing tendon (302) can be achieved by means of the assemblies of the combined reinforcing device without the aid of external tensioning equipment, and the advantages of a truss reinforcing mode and an external prestress reinforcing mode are exerted at the same time.

IPC Classes  ?

• E04G 23/02 - Repairing, e.g. filling cracksRestoringAlteringEnlarging

Abstract

A device for applying external prestress on the basis of on-site release, and a bridge reinforcement method. The device for applying external prestress on the basis of on-site release consists of a bow component (100), a shaping and release mechanism (200), a reinforcement force adjustment mechanism (300), and a reinforcement mechanism (400). Production, shaping, and energy storage of the bow component (100) can be completed in a factory, so that the construction period can be effectively shortened, thereby reducing the impact on traffic. According to the present device, structural reinforcement is performed on the basis of on-site release, thereby avoiding a series of complex operations such as on-site tensioning and prestressing; moreover, the device can better adapt to a scene having a limited construction space, avoiding the problem that a large construction space is occupied due to on-site tensioning and prestressing. When the device for applying external prestress on the basis of on-site release is used for reinforcing a bridge, the prestress is slowly released on site to adapt to requirements for different degrees of reinforcement, and dynamic regulation and control of the reinforcement effect are achieved.

IPC Classes  ?

• E01D 22/00 - Methods or apparatus for repairing or strengthening existing bridges

Abstract

A forecast method and system of wind power probability density. The forecast method includes: acquiring wind power data, preprocessing the wind power data, establishing a data set; then, constructing a time-variant deep feed-forward neural network forecast model, where the model includes multiple layers of neural networks, and each layer of neural network includes an input layer, a hidden layer and an output layer which are connected in sequence; taking wind power data at adjacent moments as an input of two input layers of two adjacent layers of neural networks, taking probability density distribution of wind power at adjacent moments as an output of two output layers of two adjacent layers of neural networks, and training and testing the model; inputting the wind power data to be forecasted into the trained time-variant deep feed-forward neural network forecast model for forecasting to obtain a more accurate and reliable wind power forecast result.

IPC Classes  ?

• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/08 - Learning methods

Abstract

Provided is an acoustic emission-based apparatus for testing corrosion resistance fatigue performance, comprising: a main machine (100), comprising a frame (110) and a stretching mechanism arranged on the frame; a clamping mechanism (200), comprising a first fixture (210) and a second fixture (220) arranged opposite to the first fixture (210); the first fixture (210) and the second fixture (220) are connected to the stretching mechanism; the stretching mechanism is used for driving the first fixture (210) and the second fixture (220) to move close to or away from each other; the first fixture (210) is provided with an accommodating cavity (211) used for accommodating a corrosive body, the accommodating cavity (211) is provided with an opening (2111) disposed at one end of the first fixture (210) near the second fixture (220), and the first fixture (210) is such that when it holds a test piece (10) in place, the test piece (10) is placed in the accommodating cavity (211); a strain measurement mechanism, comprising a first acoustic emission sensor (310), a second acoustic emission sensor (320), and an acoustic emission meter (340); the first acoustic emission sensor (310) and the second acoustic emission sensor (320) are arranged at intervals along the direction of stretching of the test piece (10); a protective assembly, used for connecting to the test piece (10).

IPC Classes  ?

• G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques

Abstract

Disclosed in the present invention is a processing method for improving the high-temperature creep properties of a magnesium alloy by means of rolling and pre-compression; the mass percentage composition of the magnesium alloy is Al: 8.5-9.5%, Zn: 0.45-0.90%, Mn: 0.15-0.4%, and Y: 0.3-0.8%, the remainder being magnesium and non-removable impurity elements; and the processing method comprises the following steps: 1) implementing solid solution treatment of the magnesium alloy; 2) rolling the solid solution state magnesium alloy, the rolling temperature being 300-400°C, the rolling speed being 0.2-0.6 m/s, the number of rolling passes being 3-8 times, and the total amount of deformation being 50-80%; 3) implementing pre-compression deformation of the rolled state magnesium alloy, the pre-compression direction being perpendicular to the rolling plate surface, the pre-compression temperature being 20-100°C, the compressive strain being 0.01-0.02, the strain rate being 1x10-4s-1-2x10-4s-1, and the compression deformation being maintained for more than 5 minutes. The present invention, by means of controlling the structure of the magnesium alloy, enables creep dynamic precipitation of the magnesium alloy to occur during high-temperature creep; the creep dynamic precipitation phase increases the thermal stability of the material, improving the high-temperature creep properties.

IPC Classes  ?

• C22C 23/02 - Alloys based on magnesium with aluminium as the next major constituent
• C22F 1/06 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
• B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences

Abstract

A high-temperature forming device for imperfect single-crystal wafers used for a neutron monochromator includes a heating electric furnace, a temperature control system, a die system, a loading system, a vacuum protection system, and an auxiliary system. Where a furnace mouth of the heating electric furnace faces downwards, the heating electric furnace can be lifted vertically or a hearth of the heating electric furnace can be opened and closed. A vacuum protection cavity is formed by a glass cover and a blocking flange, a through hole is formed in one end of the glass cover, and the other end of the glass cover is closed. An operation opening is formed in the glass cover, the die system includes an upper die, a middle die, and a lower die, the middle die is a composite die.

IPC Classes  ?

• C30B 33/02 - Heat treatment
• C30B 29/08 - Germanium
• F27B 5/04 - Muffle furnacesRetort furnacesOther furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
• F27B 5/10 - Muffles
• F27D 5/00 - Supports, screens or the like for the charge within the furnace
• F27B 5/06 - Details, accessories or equipment specially adapted for furnaces of these types

Abstract

A rapid repair structure for a second-level or higher soil slope shallow landslide, and a construction method therefor. The repair structure is: steps are dug out of a collapsed portion of a landslide, a plurality of layers of backfill bagged soil are filled on the steps, a geogrid being laid out at the bottom of each layer of backfill bagged soil, and a reserved part of the geogrid being wrapped back along the backfill bagged soil above the geogrid and stretched to a required tensile strength. The geogrid is fixed to the top surface of the backfill bagged soil by means of a U-shaped nail to form an inverted wrap, the invertedly wrapped geogrid and an adjacent upper geogrid are fixedly connected by means of a U-shaped nail and are both fixed to the top surfaces of the corresponding backfilled bagged soil, and a plurality of steel reinforcement bars are implanted at the bottom of a reinforcement body formed by the backfill bagged soil and the geogrid. The repair structure of the present invention achieves a supporting and protecting effect, while also achieving energy dissipation of expansion deformation generated by soil in the slope by means of deformation of the structure itself. The invention features a good repairing effect, simple and convenient construction, low technical requirements for personnel, a short construction period, few machines, low risks, low costs, and environmental friendliness.

IPC Classes  ?

• E02D 17/20 - Securing of slopes or inclines
• E02D 5/74 - Means for anchoring structural elements or bulkheads
• E02D 17/18 - Making embankments
• E02D 3/046 - Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil

Abstract

A method for rapid prediction of the dynamic modulus of resilience of graded crushed stone considering particle crushing, the method specifically being: determining physical property parameters of a plurality of groups of graded crushed stone under different grade, different degree of compaction, and different water content conditions; on the basis of dynamic triaxial testing, respectively measuring the dynamic moduli of resilience of the plurality of groups of graded crushed stone, using a three-parameter model to perform prediction, and on the basis of the dynamic moduli of resilience of each group of graded crushed stone obtained in the dynamic triaxial testing, fitting the three-parameter model to obtain model fitting coefficients k1, k2 and k3; and determining contribution ratios of all physical property parameters of each group of graded crushed stone to the fitting parameters k1, k2 and k3 of the three-parameter model, and using a stepwise multiple regression analysis method to determine the correlation between the fitting parameters k1-k3 of the model and each physical property parameter, and thus obtain a rapid prediction formula. The present invention is able to conveniently and accurately obtain dynamic moduli of resilience of graded broken stone, allowing the design and construction of graded crushed stone in road surface structures to be scientifically guided, and guaranteeing engineering quality.

IPC Classes  ?

• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

This invention discloses a method for predicting the service life of a retired power battery. The service life of a retired power battery may be predicted by its power battery life attenuation curve. The power battery life attenuation curve is obtained by establishing a power battery life model and a charge and discharge characteristic curve of the power battery by utilizing the temperature T, the discharge rate C and the discharge depth DOD in the charging and discharging process of the power battery. This invention establishes a three-dimensional relation graph with a cycle life with respect to the capacity loss rate and the functional relationship ω=ƒ(T,C) by using the power battery life attenuation curve. The three-dimensional relation graph is applied to the same type of battery. And the attenuation of the battery in the full life cycle may be predicted.

IPC Classes  ?

• G01R 31/392 - Determining battery ageing or deterioration, e.g. state of health
• G01R 31/367 - Software therefor, e.g. for battery testing using modelling or look-up tables
• G01R 31/374 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
• G06F 30/20 - Design optimisation, verification or simulation
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

The present invention is related to an intelligent and durable buried drainage pipe involving a method of separation and transmission. The intelligent and durable buried drainage pipe of the present invention includes an inner (11) and an outer (12) pipe. The outer pipe (12) is longer than the inner pipe (11); a permanent magnet (2) is installed on a section of the outer pipe (12) that is longer than the inner pipe (11). At least one electromagnet (3) is fixed at intervals from the permanent magnet (2); the energized electromagnet (3) can attract the permanent magnet (2) causing it to slide. The end of the electromagnet (3) facing the permanent magnet (2) is provided with a distance sensor (6), and the switch is turned on/off by the distance sensor (6). An elastic telescopic member (4) is arranged between the permanent magnet (2) and the electromagnet (3).

IPC Classes  ?

• F16L 55/24 - Preventing accumulation of dirt or other matter in pipes, e.g. by traps, by strainers
• F16L 9/18 - Double-walled pipesMulti-channel pipes or pipe assemblies
• C02F 1/48 - Treatment of water, waste water, or sewage with magnetic or electric fields
• B03C 1/28 - Magnetic plugs and dipsticks

Abstract

An intelligent durable buried drainage pipe and a separation conveying method. The intelligent durable buried drainage pipe comprises an inner pipe (11) and an outer pipe (12); the outer pipe (12) is longer than the inner pipe (11); a permanent magnet (2) is provided on the section, longer than the inner pipe (11), of the outer pipe (12); at least one electromagnet (3) is fixed to the permanent magnet (2) at an interval and can attract the permanent magnet (2) to slide after being energized; the end portion, facing the permanent magnet (2), of the electromagnet (3) is provided with a distance sensor (6); the on/off of a switch is controlled by the distance sensor (6); an elastic telescopic member (4) is provided between the permanent magnet (2) and the electromagnet (3); and a housing (5) is provided on the outer pipe (12). According to the separation conveying method, magnetic substances in a pipeline (1) are attracted to the outer pipe (12) by magnetic force before entering the inner pipe (11), and the magnetic substances attracted by the permanent magnet (2) are transferred to the electromagnet (3). The separation conveying method is beneficial to collection of the magnetic substances in the drainage pipe.

IPC Classes  ?

• F16L 55/24 - Preventing accumulation of dirt or other matter in pipes, e.g. by traps, by strainers
• B03C 1/02 - Magnetic separation acting directly on the substance being separated
• F17D 5/00 - Protection or supervision of installations

Abstract

The present invention relates to an ultrasonic rolling surface strengthening process for a medium-entropy alloy plate, comprising the following steps: S1: preparing metal raw materials into a medium-entropy alloy ingot according to components of a medium-entropy alloy; S2: cutting, by means of a lathe, the alloy ingot into an alloy plate having a smooth surface; S3: separately mounting the alloy plate and an ultrasonic rolling strengthening tool on a numerically controlled machine tool, and setting a spring compression amount of the ultrasonic rolling strengthening tool, a machine tool feeding path, and a machine tool feeding speed; S4: providing and starting an ultrasonic generator, and regulating to a preset frequency and a preset amplitude parameter; S5: turning on the numerically controlled machine tool, performing covering rolling processing on the surface of the alloy plate, and uninterruptedly cooling and lubricating the surface of the alloy plate in the processing process; and S6: repeatedly executing step S5 until a preset requirement is met, thus obtaining a medium-entropy alloy plate of a nano gradient structure. The plate prepared by using the ultrasonic rolling surface strengthening process of the present invention has high strength and a smooth surface.

IPC Classes  ?

• C22F 1/16 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
• C22C 30/00 - Alloys containing less than 50% by weight of each constituent

Abstract

xyzvv by molar percentage, wherein x, y and z values all range from 29.41% to 32.26%, and v value ranges from 3.22% to 11.77%. The TiC strengthened CoCrNi medium-entropy alloy composite material provided by the present invention has excellent mechanical properties. The compressive yield strength and breaking strength thereof can respectively reach 920 MPa and 1900 MPa, the compressive breaking strain can still reach 31%, and compared with cast CoCrNi medium-entropy alloys, the strength thereof is improved.

IPC Classes  ?

• C22C 1/05 - Mixtures of metal powder with non-metallic powder
• C22C 30/00 - Alloys containing less than 50% by weight of each constituent
• C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ

Abstract

2 nanoparticles on the mica-based phase change thermal storage thin layer. The dynamic thermal infrared stealth composite material can synergistically reinforce thermal infrared stealth performance.

IPC Classes  ?

• F41H 3/00 - Camouflage, i.e. means or methods for concealment or disguise
• C09K 5/06 - Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice-versa
• B05D 1/00 - Processes for applying liquids or other fluent materials
• B05D 3/00 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials

Abstract

The invention discloses a method and a system for predicting the corrosion fatigue life of prestressed concrete bridges. A corrosion level of the strand is predicted to obtain the residual tension force of a structure. A stress concentration factor is integrated to consider the stress concentration effect caused by pitting corrosion, and a growth model of the elastic stress of the strand under the coupled effect of corrosion and fatigue is proposed. A growth model of the plastic stress of the strand is established using a cross-section loss of the strand as a fatigue damage parameter based on a degenerated elastic modulus of the concrete after fatigue. Failure criteria for the concrete, the strand, and a longitudinal tension bar are defined, so that a set of methods for analyzing the life of a prestressed concrete bridge subjected to corrosive environment and fatigue load are formed.

IPC Classes  ?

• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light
• G01N 3/32 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
• G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings
• E01D 1/00 - Bridges in general
• E01D 101/26 - Concrete reinforced

Abstract

A mechanical ball-milling method for preparing a polydopamine-modified montmorillonite nanomaterial is disclosed. The method includes dispersing a montmorillonite material in an aqueous solution, stirring, concentrating and collecting a concentrated montmorillonite solution for use; adding dopamine hydrochloride to a buffer solution to prepare a dopamine hydrochloride solution, with a concentration of 0.2-1 g/mL, and adjusting the pH value of the dopamine hydrochloride solution; and adding the dopamine hydrochloride solution and the concentrated montmorillonite solution simultaneously into a ball mill jar to form a mixture, and then subjecting the mixture to a ball milling for 0.3-6 hours, pouring the mixture out of the ball mill jar, and subjecting to a solid-liquid separation by a centrifugation, and then washing a solid product with deionized water for 3-6 times, and removing water from the solid product, to obtain the polydopamine-modified montmorillonite nanomaterial.

IPC Classes  ?

• C08G 73/02 - Polyamines
• C01B 33/40 - Clays
• C08K 3/34 - Silicon-containing compounds

Abstract

A working method for a foldable arm conveyor (29). The foldable arm conveyor (29) is mainly composed of main components, such as a base frame (25) mounted on the ground of a stock yard (30), a tower body (24) mounted on the base frame (25), a balance arm (17), a conveying arm, and a tower top (10); the balance arm (17), the conveying arm and the tower top (10) are mounted on the tower body (24), a gantry I (5), a gantry II (2) and an unloading trolley (9) are provided on the conveying arm, a rotating device (23) and a hopper (22) are provided on the tower body (24), and a balance trolley (16) is provided on the balance arm (17). The working method comprises a conveying arm unfolding method and a dynamic counterweight method.

IPC Classes  ?

• B65G 63/00 - Transferring or trans-shipping at storage areas, railway yards or harboursMarshalling yard installations

Abstract

A horizontally rotating folding arm conveyor. The folding arm conveyor is mainly composed of a bottom frame (25) installed on the ground of a stockyard (30), a tower body (24) installed on the bottom frame (25), a balance arm (17), conveying arms (7, 4, 1), a tower top (10), and other main parts, wherein the balance arm (17), the conveying arms (7, 4, 1) and the tower top (10) are installed on the tower body (24). A portal frame I (5), a portal frame II (2) and a discharging trolley (9) are provided on the conveying arms (7, 4, 1); a rotary device (23) and a hopper (22) are provided on the tower body (24); a balance trolley (16) is provided on the balance arm (17). The folding arm conveyor can achieve horizontal rotation and can control steel wire ropes (11, 12, 13) to fold and retract the conveying arms (7, 4, 1) by means of winches (21, 20, 19), so that collision with other equipment or buildings in a rotation process is prevented, and the risk of conveyor toppling under the action of wind force can also be effectively reduced.

IPC Classes  ?

• B65G 63/00 - Transferring or trans-shipping at storage areas, railway yards or harboursMarshalling yard installations
• B66C 23/68 - Jibs foldable or otherwise adjustable in configuration

Abstract

Disclosed by the present invention is cross-bank lifting-type feeding and conveying equipment, comprising a rail system, a lifting feeding trolley, a feeding hopper system, a rail system, a telescopic conveyor, a winch, a variable-amplitude conveyor and a fixed conveyor. The equipment is characterized in that: the rail system comprises a guide rail and a buffer spring; the feeding hopper system comprises a feeding hopper, a hopper door and a vibrating rod; the lifting feeding trolley comprises a supporting rod, a clamp type brake, a lower bottom plate, a lifting hook, an upper supporting plate and a water level sensor; the telescopic conveyor comprises a first telescopic conveyor and a second telescopic conveyor; the winch is connected to the lifting hook by means of a steel wire rope; a hydraulic oil cylinder support is mounted on the variable-amplitude conveyor; and the fixed conveyor is connected to the variable-amplitude conveyor by means of a connecting piece. The present invention may effectively solve the problem that a sand unloading ship in unable to unload sand in the dry season, may effectively save a lot of manpower and improve the stacking efficiency of a sand and stone plant, and works stably and reliably.

IPC Classes  ?

• B65G 67/60 - Loading or unloading ships

Abstract

Disclosed is a large-span bulk material conveying system, comprising a piece of folding arm conveyor and cross-bank lifting-type feeding conveying equipment. The folding arm conveyor is mainly composed of a base frame (25) mounted on the ground of a stockyard, a tower body (24) mounted on the base frame (25), a balance arm (17), a conveying arm, a tower top (10) and other main parts, wherein the balance arm (17), the conveying arm and the tower top (10) are mounted on the tower body (24); a portal frame I (5), a portal frame II (2) and a discharging trolley (9) are arranged on the conveying arm; a rotary device (23) and a hopper (22) are arranged on the the tower body (24); and a balance trolley (16) is arranged on the balance arm (17). The large-span bulk material conveying system can achieve horizontal rotation and can control, by means of a winch, a steel wire rope to fold and retract the conveying arm, such that the large-span bulk material conveying system can be prevented from colliding with other apparatuses or buildings in a rotation process, and the risk of the conveyor toppling over under the action of wind power can be effectively reduced. The present invention has the characteristics of having a simple structure and low cost, saving on ground space, realizing automatic control, etc.

IPC Classes  ?

• B66C 23/68 - Jibs foldable or otherwise adjustable in configuration
• B66C 23/72 - Counterweights or supports for balancing lifting couples

Abstract

f(x)=h/tana-h/tanxxhaa represents an included angle between an initial position of the first telescopic conveyor (4.1) and the horizontal plane.

IPC Classes  ?

• B65G 35/00 - Mechanical conveyors not otherwise provided for
• B65G 41/00 - Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames

Abstract

A damper for energy dissipation, including a core plate, at least four restrain plates and at least four connecting plates. The connecting plates are provided on two ends of the core plate, and the restrain plates are provided on middle of the core plate. The core plate is provided with a first hole, a second hole and a third hole. The connecting plate includes a first plate body and a second plate body connected with an end thereof. A first fastener passes through the first hole to connect the first plate body with the core plate. A second fastener passes through the second hole to connect the second plate body with the core plate. A third fastener passes through the third hole to connect the restrain plate with the core plate. The second plate body is located between two restrain plates.

IPC Classes  ?

• E04B 1/98 - Protection against other undesired influences or dangers against vibrations or shocksProtection against other undesired influences or dangers against mechanical destruction, e.g. by air-raids
• E04H 9/02 - Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
• F16F 7/00 - Vibration-dampersShock-absorbers

Abstract

The present invention relates to an energy dissipation damper based on tension and compression yield of a perforated steel plate, which belongs to the field of buildings. An energy dissipation damper based on tension and compression yield of a perforated steel plate, comprising a perforated core plate, outer restraining plates and cone-shaped connecting members; the perforated core plate is provided with first connecting holes and second connecting holes for connecting the cone-shaped connecting members, and third connecting holes for connecting the outer restraining plates; the cone-shaped connecting members are located at upper and lower ends of the perforated core plate, the outer restraining plates are located at two sides of the central part of the perforated core plate, and the cone-shaped connecting members and the outer restraining plates can slide relative to each other on the perforated core plate. The present invention provides a new energy dissipation apparatus for improving the anti-seismic performance of structural members such as columns and piers; in addition, the present invention has a simple structure and is easy to assemble, being suitable for prefabricated buildings.

IPC Classes  ?

• E04B 1/98 - Protection against other undesired influences or dangers against vibrations or shocksProtection against other undesired influences or dangers against mechanical destruction, e.g. by air-raids
• E04H 9/02 - Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
• E01D 19/00 - Details of bridges

Abstract

The present invention relates to the field of heat storage materials. Specifically disclosed is a composite phase change regulator, comprising disodium hydrogen phosphate dodecahydrate, diatomite, polyacrylamide and sodium dodecylbenzene sulfonate. Also provided are a composite phase change heat storage material containing the composite phase change regulator, as well as the preparation for and application of the composite phase change heat storage material. According to the present invention, it is found that the combination of the quaternary active ingredients of the disodium hydrogen phosphate dodecahydrate, the diatomite, the polyacrylamide and the sodium dodecylbenzene sulfonate is synergistic, which may effectively and synergistically improve the problems of phase separation and supercooling of the phase change material, may regulate the crystallization behavior of phase change material crystals, and may assist in improving the phase change behavior of the phase change material. The composition arrangement of the present invention is reasonable, the processing technology is simple, and the heat storage behavior of the material may be directionally regulated. The adaptability is strong, making the invention convenient for large-scale application.

IPC Classes  ?

• C09K 5/06 - Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice-versa

Abstract

A method for predicting the life of retired power batteries. The life of the same type of screened retired power batteries with the same state parameters is predicted. The influence of temperature T, discharge rate C, and depth of discharge (DOD) on power battery capacity decline during the charging/discharging process of power batteries is used, a power battery life decay curve is obtained by establishing the charging/discharging characteristic curve of the power batteries and a power battery life model, a three-dimensional relationship diagram of a cycle life with respect to the capacity loss rate and the functional relationship ω=f(T,C) is established using the life decay curve, and the performance degradation of the batteries within a full life cycle can be predicted by applying the three-dimensional relationship diagram is applied to the same type of batteries. The life of retired power batteries can be quickly predicted by means of a small amount of calculations, thereby greatly improving the working efficiency of enterprises.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• G06F 119/04 - Ageing analysis or optimisation against ageing

Abstract

2 film layer on a surface of the dried aluminized Fe-based alloy by using an atom layer vapor deposition. The application of the molten Al—Si alloy corrosion resistant composite coating is used for a solar thermal power generation heat exchange tube.

IPC Classes  ?

• C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
• C23C 16/02 - Pretreatment of the material to be coated
• C23C 16/455 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into the reaction chamber or for modifying gas flows in the reaction chamber
• C23C 24/08 - Coating starting from inorganic powder by application of heat or pressure and heat

Abstract

An arch foot maintaining device includes a plurality of supporting structures, and the supporting structure includes a base, two base supporting seats, a hydraulic jack, a roller, and a roller supporting seat. The base is a cuboid with equal length and width, a through hole running through side surfaces of the base is provided on the base. A vertical guide groove is provided on each of the two base supporting seats. The roller supporting seat is U-shaped and located between the two base supporting seats, and the roller is rotatably supported in the roller supporting seat. Two ends of a central axis of the roller are respectively located in the two guide grooves, the hydraulic jack is disposed within the base, and a top of the hydraulic jack abuts against a bottom of the roller supporting seat.

IPC Classes  ?

• E01D 4/00 - Arch-type bridges
• E01D 22/00 - Methods or apparatus for repairing or strengthening existing bridges
• E01D 19/04 - BearingsHinges

Abstract

A method for dispatching a power system based on optimal load transfer ratio and optimal grid connection ratio of wind power and photovoltaic power includes: acquiring load data; drawing a load curve; defining a peak load period, a flat load period and a low load period, and calculating average loads of the peak load period, the flat load period and the low load period before a load transfer; determining value ranges of a peak-low load transfer ratio, a peak-flat load transfer ratio and a flat-low load transfer ratio; establishing an objective function considering generation cost of thermal power unit, wind power purchase cost, PV power purchase cost and compensation cost for consumer load transfer; introducing an immune algorithm to calculate grid connection ratio of wind power, grid connection ratio of PV power, peak-low load transfer ratio, peak-flat load transfer ratio and flat-low load ratio corresponding to a minimum operating cost.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors

Abstract

The present invention relates to a method for preparing a diamond tool, characterized in: step 1, providing a base plate of a diamond tool; step 2, providing diamond particles; step 3, providing an alloy powder; step 4, providing a laser-based manufacturing system; step 5, starting the laser-based manufacturing system; step 6, cladding a thin layer of the alloy powder on the surface of the base layer in a high-power continuous laser coaxial powder feeding mode, and simultaneously starting a diamond jetting device; step 7, completing laser brazing and turning off the diamond jetting device; step 8, starting a dusting device; step 9, scanning a test piece with short pulse laser light; step 10, repeating the above steps 8 and 9 several times to obtain a diamond tool consolidated abrasive layer; step 11, turning off the laser-based manufacturing system; and step 12, placing the prepared diamond tool into a heating furnace to perform post-processing to complete the diamond tool preparation process. Compared with the prior art, the diamond tool prepared by the present invention has good bonding properties, small thermal effects, and high processing efficiency.

IPC Classes  ?

• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing
• B23K 1/00 - Soldering, e.g. brazing, or unsoldering
• B23K 1/005 - Soldering by means of radiant energy
• B24D 18/00 - Manufacture of grinding tools, e.g. wheels, not otherwise provided for

Abstract

A manufacturing method of whole grain rice noodles comprises: step 1, preparing 30-45 parts of brown rice, and using a 50-70 mesh sieve to perform filtering; step 2, mechanically removing hull from the filtered brown rice obtained in step 1, and obtaining white rice and bran; step 3, placing the bran obtained in step 2 in a dry storage container, storing same at 4 Celsius degrees, and independently storing the white rice obtained in step 2; step 4, washing the white rice obtained in step 3, and soaking same for four hours; step 5, simultaneously grinding and mixing the rice soaked in step 4 and the bran stored in step 3, and obtaining rice milk; step 6, adding an additive to the rice milk obtained in step 5 according to a ratio, and uniformly stirring same to obtain a rice milk mixture; step 7, steaming the rice milk mixture obtained in step 6; and step 8, cutting and shaping. The rice noodles manufactured by the method contain nutrients of whole grains and have mouth feel characteristics and texture similar to normal rice noodles.

IPC Classes  ?

• A23L 7/10 - Cereal-derived products
• A23L 29/00 - Foods or foodstuffs containing additivesPreparation or treatment thereof

Abstract

22 thin film layer. Also disclosed are a preparation method for an anti-fusion aluminum silicon alloy corrosion composite coating layer and an application thereof.

IPC Classes  ?

• C23C 10/50 - Aluminising of ferrous surfaces
• C23C 10/60 - After-treatment
• C23C 16/40 - Oxides
• C23C 16/455 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into the reaction chamber or for modifying gas flows in the reaction chamber
• C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and

Abstract

233 thin film. The preparation method comprises: (1) electrolytic polishing; (2) aluminum percolation: performing treatment at 400°C - 600°C and 900°C - 1050°C respectively, furnace cooling; (3) sandblasting: performing at 0.6MPa - 0.9MPa nitrogen; and (4) annealing: annealing at 1000°C - 1100°C, furnace cooling; and (5) laser shock peening: single pulse energy 4-7J, spot diameter 2.6 - 3mm, 1 - 3 times. The modified steel has a good creep resistance performance and corrosion resistance performance under the conditions of molten aluminium-silicon alloy, has a percolation layer without brittle phase, a strong binding force with the matrix, a good anti-strip performance, and a good toughness and strength.

IPC Classes  ?

• C23C 10/50 - Aluminising of ferrous surfaces

Abstract

The present invention discloses a pollutant generation system. The pollutant generation system includes a pollution source and a pollutant emitter. The pollutant emitter is connected to the pollution source. The pollution source is composed of two gases including air and methane. The flows of the gases are strictly controlled. Then, the gases enter a magnetic bead glass bottle. Due to the disturbance of magnetic beads to the flowing of the gases, the gases are sufficiently disordered, and the two gases are sufficiently mixed by using a spiral tube to generate a uniform and stable pollution source.

IPC Classes  ?

• G01M 9/04 - Wind tunnels Details
• G01M 9/06 - Measuring arrangements specially adapted for aerodynamic testing
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• G01N 30/38 - Flow patterns
• G01N 15/06 - Investigating concentration of particle suspensions
• G01N 15/00 - Investigating characteristics of particlesInvestigating permeability, pore-volume or surface-area of porous materials

Abstract

A Bailey beam for reinforcement is composed of Bailey panels, stiffening rods, bolts, anchor bolts, a prestressing tendon and anchorages. The components of the Bailey beam are all prefabricated in a factory, and are assembled and hoisted on site. The prestressing tendon is arranged in a lower chord of the Bailey beam, and is anchored to the stiffening rods at both ends. The Bailey beam slides towards both ends during prestress tensioning. In this case, the Bailey beam is lifted as a whole, and the prestressing force is applied to a lower edge of the Bailey beam, resulting in an inverted arch of structure, closing up of cracks and a decrease in downward deflection. After the completion of the prestress tensioning, sealing is performed by fixing fillers, a sealing steel plate and injecting solidifiable materials.

IPC Classes  ?

• E04G 23/02 - Repairing, e.g. filling cracksRestoringAlteringEnlarging
• E01D 22/00 - Methods or apparatus for repairing or strengthening existing bridges

Abstract

An arch foot maintenance device and a maintenance method for achieving multi-degree-of-freedom displacement of an arch foot, the device comprising a plurality of support structures, wherein a support structure comprises a base (1), two base supporting seats (7), a hydraulic jack (2), a roller (3) and a roller supporting seat (4); the base (1) is a cuboid of equal length and width, and the base (1) is provided thereon with a through hole penetrating a side surface of the base (1); the two base supporting seats (7) are provided thereon with vertical guide grooves, and the roller supporting seat (4) is U-shaped and located between the two base supporting seats (7); the roller (3) is rotatably supported in the roller supporting seat (4); two ends of a central shaft (14) of the roller (3) are respectively located in the two guide grooves; and the hydraulic jack (2) is arranged in the base (1) and abuts against the bottom of the roller supporting seat (4). Thus, a plurality of supporting structures are combined freely to form the arch foot maintenance device, and the translation and rotation of the arch foot are implemented by cutting the arch foot and controlling the lifting and lowering of each roller (3). The device is simple in structure, flexible and changeable, easy to operate, highly adaptable, and may be popularized and applied in arch foot maintenance and reinforcement.

IPC Classes  ?

• E01D 21/08 - Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
• E01D 1/00 - Bridges in general
• E01D 22/00 - Methods or apparatus for repairing or strengthening existing bridges
• B25B 11/00 - Work holders or positioners not covered by groups , e.g. magnetic work holders, vacuum work holders

Abstract

222222 nanoparticles are coated on the mica-based phase change thermal storage thin layer to prepare the dual phase change composite material. The dynamic thermal infrared stealth composite material based on dual phase change of the present invention can achieve the synergistic reinforcement of thermal infrared stealth properties, and can be applied in thermal infrared stealth technologies.

IPC Classes  ?

• C09K 5/06 - Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice-versa

Abstract

A method for predicting the service life of a reinforced concrete bridge under the conditions of seasonal corrosion and fatigue coupling, comprising: dividing the service life of the reinforced concrete bridge into three stages: a corrosion initiation-pure fatigue crack development stage, a rust pit and fatigue crack competing development stage and a structure failure stage; establishing an initial reinforcing steel bar corrosion model and a rust pit growth model on the basis of the Fick second diffusion law and by considering the influence of concrete rust expansion cracking damage; testing and simulating a reinforcing steel bar crack expansion rule under the influence of a four-season environment, and determining fatigue crack growth characterization parameters; constructing a stress intensity factor model considering the influence of stress concentration, and proposing an enforcing steel bar corrosion fatigue crack growth analysis method corresponding to the four-season environment; and defining a structural failure criterion, systematically considering the competitive coupling relation between rust pit growth and fatigue crack growth by combining vehicle load observation information, determining a failure mode in real time, and predicting the service life of the bridge. The present method may be used to provide technical support for safety assessment of the concrete bridge.

IPC Classes  ?

• G01N 3/32 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
• G01N 3/56 - Investigating resistance to wear or abrasion
• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light

Abstract

A corrosion fatigue life prediction method and system for a prestressed concrete bridge. The stress of a steel strand is divided into three parts: tensile stress caused by remaining effective prestress, elastic stress caused by fatigue load, and stress caused by plastic deformation of concrete in a compressive area. The remaining structure prestress is obtained by predicting the level of corrosion of the steel strand; a stress concentration factor is introduced to consider the effect of stress concentration caused by pitting corrosion, and an elastic stress growth model for the steel strand under the action of both corrosion and fatigue is provided; taking the cross-section loss of the steel strand as a fatigue damage parameter and considering the degradation of the elastic modulus of the concrete after fatigue, a plastic stress growth model for the steel strand is established; a failure criteria of concrete, steel strands and ordinary steel bars are clarified; and a life analysis method for a prestressed concrete bridge under corrosive environment and fatigue load is formed. The prediction method is reasonable and applicable, and can provide support for safety assessment of prestressed concrete bridges in service.

IPC Classes  ?

• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light
• G01N 3/32 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces

Abstract

Disclosed by the present invention is a method for calculating the flexural capacity of a PC component under the influence of bond deterioration, comprising: evaluating the cracking due to corrosion expansion of concrete under the influence of corrosion and the bond strength of a steel strand, introducing an equivalent bond strength concept to consider the influence of a load crack on bond strength distribution, and establishing a stress expression of the corroded steel strand under the action of the load; introducing a deformation coordination coefficient to quantify the deformation discordance between the corroded steel strand and the concrete, and clarifying the stress and strain distribution regularities in the cross section of a component; and establishing a stress and bending moment balance equation in the cross section of a corroded PC beam, so as to obtain a method for calculating the flexural capacity of a corroded PC beam. The method for calculating the flexural capacity of a PC component under the influence of bond deterioration provided by the present invention comprehensively considers the influences of reduced steel strand sectional area, degraded material, concrete cracking, bond deterioration, load cracking and other factors which are caused by corrosion, and thus has important guiding significance for the evaluation of the residual load bearing capacity of an existing PC girder bridge.

IPC Classes  ?

• G06F 17/50 - Computer-aided design

Abstract

Disclosed are a pre-stressed Bailey beam for reinforcement and a construction method therefor. The Bailey beam is composed of Bailey frames (2, 3, 4, 5), stiffening rods (6), bolts (7), anchor bolts (8, 9, 10), a pre-stressed tendon (11) and anchors (12, 13), wherein the components of the Bailey bridge are all prefabricated in a factory, and are assembled and hoisted on site; and the pre-stressed tendon (11) is arranged in a lower chord (18) of the Bailey beam, and is anchored in the stiffening rods (6) at two ends thereof. The Bailey beam slides towards the two ends during pre-stress tensioning and is lifted as a whole, and pre-stress is also applied to a lower edge of the Bailey beam, thereby achieving the effects of having a inverted arch structure, closing cracks and reducing downward deflection. After tensioning is completed, sealing is performed by fixing a filler and a sealing steel plate (15) and by injecting a solidification body, such that the pre-stressed tendon (11) and the Bailey beam form a whole to be stressed together, thereby not only reducing a pre-stress loss, but also improving the durability of the pre-stressed tendon. The Bailey beam transmits a force based on a lever principle. Full use is made of the advantages of the Bailey beam and an external pre-stress, and by means of assembly-type construction, the Bailey beam is easy to assemble, has a short construction period and does not require traffic to be interrupted, and can be widely used in the field of the reinforcement of concrete structures.

IPC Classes  ?

• E01D 22/00 - Methods or apparatus for repairing or strengthening existing bridges
• E01D 101/32 - Metal prestressed

Abstract

A wind tunnel test pollutant generation system and monitoring system. The pollutant generation system comprises a pollution source and a pollutant transmitter (9). The pollutant transmitter (9) is connected to the pollution source, the pollution source is composed of two types of gas, namely air and methane, and the flow of the two types of gas into a magnetic bead glass bottle (8) is strictly controlled. Since a magnetic bead affects the flow of the gas, the two types of gas are fully turbulent. A spiral tube (7) is used for fully mixing the two types of gas, thereby generating a uniform and stable pollution source. The pollutant monitoring system further comprises a wind tunnel (1) and a pollutant concentration monitoring system, the pollutant concentration monitoring system comprising a monitoring tube (13), a collection bag (15), and a chromatographic analyzer (16), wherein the chromatographic analyzer (16) is used for analyzing a pollution gas and transmitting an analysis result to a computer (17), thereby obtaining a visual image of the distribution of pollutant concentration in a simulation region.

IPC Classes  ?

• G01M 9/06 - Measuring arrangements specially adapted for aerodynamic testing
• G01M 9/04 - Wind tunnels Details
• G01N 30/02 - Column chromatography

Abstract

An asphalt pavement pore water pressure simulation test device comprises at least two pressure vessels (63), each of which is provided with an asphalt concrete test piece (71); and an open container (62). Adhesive (101) is filled in between the bottom of the asphalt concrete test piece (71) and an open annular portion of the open container (62), and the side wall of the asphalt concrete test piece (71) is coated with the adhesive (101). The side wall of the pressure vessel (63) is provided with a first pressure sensor (52) for measuring the external water pressure of the asphalt concrete piece (71). The side wall of the open container (62) is provided with a second pressure sensor (53) for measuring the water pressure at the bottom of the asphalt concrete piece (71). Each open container (62) communicates through a pipe (83) which passes through the side wall of each pressure vessel (63). In the test method of the device, the test pieces (71) in each pressure vessel (63) are sequentially loaded by using a control flow which meets different wheel load characteristics, which can achieve the directional movement of the pore water, and the dynamic response of water pressure in asphalt concrete pores can be tested under the effect of the dynamically changing external water pressure.

IPC Classes  ?

• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials