Abstract

A method for rapid demolishing of a cement concrete pavement slab and a device there for. The device includes a demolishing vehicle, and the demolishing vehicle includes a base disposed at a bottom of the demolishing vehicle. The first shallow cutting allows first saws to make a minimal cut into the cement concrete pavement, increasing the cutting speed. A second deeper cutting is made on the basis of the grooves cut by the first saws, and although second saws have a larger feed, a cutting thickness of the cement concrete pavement is reduced by the first saws. A third cutting follows the same principle as the previous cuttings.

IPC Classes  ?

• E01C 23/09 - Devices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removedDevices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for cleaning, treating, or filling cuts, grooves, recesses, or fissuresDevices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for trimming paving edges

Abstract

A method for evaluating the service performance of transportation infrastructure health monitoring systems and a device therefor. The method includes: placing the provided external incentive within the road section monitored by the transportation infrastructure health monitoring system to be evaluated; obtaining feedback data corresponding to the external incentive acting within the road section through the standard sensor; constructing a predictive response model of the feedback data within the road section, and combining the predictive response model with the feedback data to obtain predicted data; obtaining measured data through the transportation infrastructure health monitoring system to be evaluated; conducting an evaluation and a calibration on service performance of the transportation infrastructure health monitoring system to be evaluated based on the predicted data and the measured data. It achieves the effectiveness evaluation of transportation infrastructure monitoring systems and reduces the demand for human and material resources during evaluation process.

IPC Classes  ?

• G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings

Abstract

The present disclosure relates to the technical field of tunnel construction, in particular to a design method of a buffer layer with critical deformation of a tunnel initial support as a control target. The method includes the following steps: (1) establishing a mechanical model and calculating an ultimate bearing capacity of the tunnel initial support during critical damage based on a cusp catastrophe theory; (2) determining a critical deformation value of the tunnel initial support under the ultimate bearing capacity; (3) establishing a yielding control target of a tunnel buffer layer; (4) determining a performance index of the buffer layer according to the control target, and calculating corresponding index parameters. Compared with the prior art, the method has the following beneficial effects. The method aims to put forward the critical deformation value of the tunnel initial support under the ultimate bearing capacity, obtain an optimal yielding design parameters of the buffer layer by taking a compression and load transfer mode of the tunnel buffer layer as a link, and give a calculation method.

IPC Classes  ?

• E21D 9/14 - Layout of tunnels or galleriesConstructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
• G06F 30/20 - Design optimisation, verification or simulation

Abstract

A method for evaluating a probability of road collapse is provided, which includes: collecting road data information of the road to be analyzed, and obtaining road soil layer information and underground pipeline information respectively through the road data information; determining road soil layer deterioration factors based on the road soil layer information; constructing a deterioration factor influence intensity model combined with the road soil layer information to obtain the probability of the influence of the road soil layer deterioration factors; constructing an underground pipeline deterioration influence intensity model combined with the underground pipeline information to obtain the probability of the underground pipeline deterioration influence; summarizing the probability of the influence of the road soil layer deterioration factors and the probability of the underground pipeline deterioration influence, and then evaluating the probability of road collapse, improving the scientific nature and accuracy of the road collapse assessment process.

IPC Classes  ?

• G01V 20/00 - Geomodelling in general

Abstract

Provided is a perception evaluation method for a bearing capacity of a highway tunnel lining structure, including: from the load effect evolution state of surrounding rock and the decay mechanical state of a lining structure, the characterization index system of a highway tunnel bearing capacity is constructed; a characterization index inversion function relationship based on strain data of an inner surface of the highway tunnel lining is provided, a bearing capacity perception layout scheme of the tunnel structure is constructed accordingly, and a complete set of perception method for bearing capacity characterization indexes is obtained; then, by calculating a load effect function and a resistance effect function, the calculation and evaluation method of the tunnel structure bearing capacity.

IPC Classes  ?

• G01L 5/16 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
• E21F 17/18 - Special adaptations of signalling or alarm devices

Abstract

The disclosed are a deflection calibration apparatus and method for a laser type high-speed deflection tester. The apparatus comprises rigid supports, rotating discs, driving systems and a deflection calibration unit; the rotating discs are mounted on the rigid supports and driven by the driving systems to rotate, and upper surfaces of the rotating discs are processed into inclined planes having a slope in the circumferential direction; the deflection calibration unit is used for calibrating a laser type high-speed deflection tester according to measured and theoretical deflection values; laser emitted by a Laser-Doppler vibrometer is incident on the upper surfaces of the rotating discs to obtain the measured deflection value; the deflection calibration unit calculates the theoretical deflection value according to the inclination angle and the rotational angular velocity of each rotating disc and the distance between a laser incident point and the gyration center of each rotating disc.

IPC Classes  ?

• G01N 29/30 - Arrangements for calibrating or comparing, e.g. with standard objects
• G01N 29/24 - Probes
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass

Abstract

A passive excitation-based online calibration method for a bridge structural monitoring system, comprising: taking a dynamic load of a normal passing vehicle of a bridge as a passive excitation source to act on a bridge structure; an RS and an SMS to be calibrated continuously and synchronously acquiring strain data of the bridge structure, and forming measurement data sequences according to time sequencing; calculating an instantaneous measurement error, a period measurement error, and a basic error of the SMS according to the measurement data sequences respectively acquired by the RS and the SMS to be calibrated; and taking the instantaneous measurement error, and/or the period measurement error, and/or the basic error as a calibration basis to perform online calibration on the metrology performance of the SMS.

IPC Classes  ?

• G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings

Abstract

A vehicle-road cooperation precise positioning method based on an electrified highway includes measuring position information of its own positioning point by using a roadside positioning module; determining absolute coordinates of all points on a communication line according to the position information; acquiring a contact signal when a vehicle-road connection information system comes into contact with the communication line, and determining position information of a contact point according to the contact signal and the absolute coordinates; and based on a conversion algorithm, determining current vehicle mass center position coordinate information according to the position information of the contact point and parameter information of the vehicle-road connection information system. In the process of real-time acquisition of vehicle dynamic position information, the method does not rely on a satellite positioning system at all and is based on a wired vehicle-road connection of the electrified highway, so that timeliness and reliability are higher.

IPC Classes  ?

• G01C 21/28 - NavigationNavigational instruments not provided for in groups specially adapted for navigation in a road network with correlation of data from several navigational instruments
• B60L 5/24 - Pantographs

Abstract

0 during actual construction.

IPC Classes  ?

• E01C 23/00 - Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
• G01N 25/00 - Investigating or analysing materials by the use of thermal means
• E01C 7/18 - Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
• E01C 23/01 - Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed supportsApplications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass

Abstract

A temperature monitoring method of a brake of a freight vehicle based on TBOX is provided, including: determining a weight of the freight vehicle based on OBD data of the freight vehicle collected by the TBOX; inputting the weight, the OBD data, a longitudinal slope in a high-precision map to determine the temperature of the brake of the freight vehicle; setting a temperature warning threshold of the brake based on its performance parameters of the freight vehicle, and determining a first driving state and a second driving state in a front road section with the determined temperature of the brake, and generating a warning signal and a forewarning signal of the freight vehicle. The monitoring method improves accuracy of the brake temperature by introducing altitude variation of the front road section and weight of the freight vehicle, and provides powerful data support for a safe driving.

IPC Classes  ?

• B60T 17/22 - Devices for monitoring or checking brake systemsSignal devices

Abstract

Disclosed is a method for evaluating environmental erosion of thaumasite in tunnel concrete, including: acquiring natural corrosion action parameters and environmental influence action parameters, and evaluating a natural corrosion situation based on the natural corrosion action parameters to obtain an initial evaluation result; and modifying the initial evaluation result based on the environmental influence action parameters to obtain a target evaluation result.

IPC Classes  ?

• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass
• G01N 33/18 - Water

Abstract

The present application discloses a deflection calibration apparatus and method for a laser type high-speed deflection tester. The apparatus comprises rigid supports, rotating discs, driving systems and a deflection calibration unit; the rotating discs are mounted on the rigid supports, the driving systems drive the rotating discs to rotate, and the upper surfaces of the rotating discs are processed into inclined planes having a slope in the circumferential direction; the deflection calibration unit is used for calibrating a laser type high-speed deflection tester according to a measured deflection value and a theoretical deflection value; laser emitted by a laser doppler vibrometer in the laser type high-speed deflection tester is incident on the upper surfaces of the rotating discs, so that the measured deflection value is obtained; and the deflection calibration unit calculates the theoretical deflection value according to the inclination angle and the rotational angular velocity of each rotating disc and the distance between a laser incident point and the gyration center of each rotating disc. According to the present application, lossless calibration of a measurement result of the laser type high-speed deflection tester is realized.

IPC Classes  ?

• E01C 23/01 - Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed supportsApplications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
• G01C 25/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass

Abstract

A construction method for a karst tunnel crossing over a high-water-level underground river. The method comprises the following steps: 1) excavating a section where a tunnel crosses over an underground river by means of a three-step method; 2) constructing a bridge-shaped water guide structure crossing the tunnel and crossing over the high-water-level underground river; 3) providing a water retaining wall (17) around a water inlet of the water guide structure, blocking a runoff path of the underground river, and introducing water into a water guide pipeline pre-buried in the water retaining wall; and 4) providing a water retaining wall around a water outlet of the water guide structure to ensure that water in an underground river pipeline does not flow back into the tunnel. Further disclosed is a water guide structure for construction of a karst tunnel crossing over a high-water-level underground river. Large-flow underground water of the underground river exposed during tunnel construction is guided downstream of the underground river in a cross-over tunnel clearance manner, such that the tunnel construction can be resumed as soon as possible, an underground water environment is protected, and the cost for pumping out the large-flow underground water is reduced.

IPC Classes  ?

• E21D 9/04 - Driving tunnels or galleries through loose materialsApparatus therefor not otherwise provided for
• E21D 11/10 - Lining with building materials with concrete cast in situShuttering or other equipment adapted therefor
• E21D 11/15 - Plate liningsLaggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
• E21D 11/38 - WaterproofingHeat insulatingSoundproofingElectric insulating
• E21F 16/02 - Drainage of tunnels
• E21F 17/00 - Methods or devices for use in mines or tunnels, not covered elsewhere

Abstract

Disclosed is a sulfate corrosion-resistant concrete, a method for optimizing proportion and application thereof. The concrete is formed by mixing and stirring base stocks, aggregates, admixtures, external additives and water. The base stock of the concrete is 17.4-17.5 parts of Portland cement; the aggregates include 38.9 parts of basalt with aggregate size of 5-10 mm and 33.1-33.2 parts of basalt medium sand; the admixtures are 1.9-1.95 parts of silica fume or fly ash, and further including 0.23-0.24 part of polycarboxylate water reducer and 1.34-1.35 part of sulfate corrosion-resistant liquid preservative. Optimized proportion method: according to the corrosion characteristics of sulfate and corrosion environment parameters, determine the composition and proportion of basic samples and comparison samples, make and cure sample components, test the deep components of the samples, and obtain the optimal composition and proportion according to the test results.

IPC Classes  ?

• C04B 40/00 - Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
• C04B 14/14 - Minerals of vulcanic origin
• C04B 14/28 - Carbonates of calcium
• C04B 18/08 - Flue dust
• C04B 22/14 - Acids or salts thereof containing sulfur in the anion, e.g. sulfides
• C04B 24/26 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• C04B 28/04 - Portland cements
• G01N 23/20 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by using diffraction of the radiation by the materials, e.g. for investigating crystal structureInvestigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materialsInvestigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by using reflection of the radiation by the materials
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass
• C04B 103/30 - Water reducers, plasticisers, air-entrainers
• C04B 111/20 - Resistance against chemical, physical or biological attack

Abstract

A passive excitation-based online calibration method for a bridge structure strain monitoring system, comprising: taking a dynamic load of a normal passing vehicle of a bridge as a passive excitation source to act on a bridge structure; an RS system and an SMS system to be calibrated continuously and synchronously acquiring strain data of the bridge structure, and forming measurement data sequences according to time sequencing; calculating an instantaneous measurement error, a period measurement error, and a basic error of the SMS system according to the measurement data sequences respectively acquired by the RS system and the SMS system to be calibrated; and taking the instantaneous measurement error, and/or the period measurement error, and/or the basic error as a calibration basis to perform online calibration on the metrology performance of the SMS system.

IPC Classes  ?

• G01B 21/32 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid

Abstract

Provided is a method for analyzing the expansive stress and expansive strain of tunnel surrounding rock, including: (1) determining the surrounding rock state of the tunnel surrounding rock before expansion and the surrounding rock state after expansion; (2) according to the determined state of the surrounding rock, determining the expansive stress and expansive strain of the tunnel surrounding rock before expansion, and determining the expansive stress and expansive strain of the tunnel surrounding rock after expansion; (3) according to the surrounding rock state of the tunnel surrounding rock after expansion, determining the expansive deformation radius of the tunnel surrounding rock, so as to determine the expansive deformation displacement of the tunnel surrounding rock.

IPC Classes  ?

• G01D 21/02 - Measuring two or more variables by means not covered by a single other subclass
• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces

Abstract

A configurable bridge cluster structure monitoring and management apparatus, comprising: a bridge cluster monitoring platform, comprising a bridge cluster configuration module, the bridge cluster configuration module having bridge structure monitoring devices, models, and units that can be selectively invoked; and a bridge structure configuration module, used for generating the bridge structure monitoring devices, models, and units selected from the bridge cluster configuration module into a bridge structure monitoring system. The apparatus has the beneficial effects of being suitable for multiple bridges, dynamic updating of configuration information, and good data compatibility. A configurable bridge cluster structure monitoring and management method, comprising the following steps: setting up bridge structure monitoring devices, models, and units in a configurable architecture; and selecting bridge structure monitoring devices, models, and units to generate a bridge structure monitoring system for each bridge. The method has the beneficial effect of avoiding the problems of each bridge structure monitoring system being developed independently, having incompatible data, and being unable to implement cluster monitoring.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
• G06Q 50/08 - Construction

Abstract

th cloud device traffic data set. Therefore, the present application can preferentially recall traffic data in the cache cloud that has a batter correspondence to task, a smaller range and even a better data structure, thereby significantly improving the data recalling rate and retrieval response efficiency of cloud devices at the same level and even the entire intelligent cloud traffic control system.

IPC Classes  ?

• G08G 1/01 - Detecting movement of traffic to be counted or controlled
• H04L 29/08 - Transmission control procedure, e.g. data link level control procedure

Abstract

An anti-rutting pavement structure is arranged consecutively from bottom to top, a semi-rigid base layer, a SBS emulsified asphalt adhesive layer, a Type II latex cement mortar poured asphalt concrete lower layer, a Type I latex cement mortar poured asphalt concrete middle layer and a high viscosity modified asphalt SMA-13 concrete surface layer.

IPC Classes  ?

• E01C 7/32 - Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
• E01C 7/26 - Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
• C04B 14/06 - QuartzSand
• C04B 18/02 - Agglomerated materials
• C04B 40/00 - Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
• C04B 24/36 - Bituminous materials, e.g. tar, pitch
• C04B 24/26 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

A rut-resistant road pavement structure comprises the following layers sequentially disposed from bottom to top: a semi-rigid subbase course (1); an SBS modified emulsified asphalt binding layer (2); an asphalt concrete bottom surface course (3) in which a type II latex cement mortar penetrates asphalt; an asphalt concrete middle surface course (4) in which a type I latex cement mortar penetrates asphalt; and a highly viscous SMA-13 modified asphalt concrete top surface course (5). Also disclosed is a pavement method of the rut-resistant road pavement structure. The rut-resistant road pavement structure mitigates the problem in which middle and bottom surface courses of a road pavement having a semi-rigid subbase course contribute greatly to the formation of ruts under a high temperature and a heavy load, and is favorable for preventing formation of cracks, thereby improving overall capabilities of a surface course and a subbase course to resist distortion, shortening construction and maintenance time, and greatly reducing costs.

IPC Classes  ?

• E01C 7/32 - Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ

Abstract

Disclosed is a polyurethane prepared by the following method. The method comprises: adding a polymerization inhibitor, catalyst and isocyanate component in a reaction container, adding a polyol to the reactor while stirring at room temperature under nitrogen, increasing the temperature to 50-80˚C, and maintaining the temperature to react for 0.5-6 hours. Further disclosed are a mixture material containing the polyurethane and a polyurethane modified asphalt road surface structure. The synthesis condition of the polyurethane is mild, and a secondary reaction thereof with the air and an active hydrogen component in the asphalt can occur during maintenance and formation to further increase the strength of a mixture material thereof. In addition, the standard Marshall stability at 60˚C thereof meets the petroleum asphalt requirement, such that a service life of the asphalt road surface can be increased.

IPC Classes  ?

• C08G 18/40 - High-molecular-weight compounds
• C08G 18/48 - Polyethers
• C04B 26/16 - Polyurethanes
• C04B 26/26 - Bituminous materials, e.g. tar, pitch
• C08L 95/00 - Compositions of bituminous materials, e.g. asphalt, tar or pitch

Abstract

This present invention discloses a waterborne polymer modified emulsified asphalt mixture and the preparation method thereof, and particularly relates to a waterborne polyurethane emulsified asphalt concrete, a waterborne acrylic resin emulsified asphalt concrete, and a waterborne epoxy resin emulsified asphalt micro-surfacing mixture, and preparation methods thereof. A mixture containing a waterborne polymer modified emulsified asphalt forms a high-performance composite system having a spatial network structure, and has good performance and simple preparation process.

IPC Classes  ?

• C08K 3/36 - Silica
• C08L 95/00 - Compositions of bituminous materials, e.g. asphalt, tar or pitch
• C08K 3/00 - Use of inorganic substances as compounding ingredients
• C08K 3/34 - Silicon-containing compounds
• C08L 75/04 - Polyurethanes

Abstract

Disclosed are a thermosetting modification asphalt mixture additive, a preparation method therefor and an asphalt mixture prepared from the modifier. The thermosetting modification asphalt mixture additive comprises the following raw materials in parts by weight: 35-70 parts of resin, 1-35 parts of a curing agent, 0-2.5 parts of an accelerant, 0-6 parts of a flatting agent, 20-40 parts of fillers and 0-2 parts of an auxiliary agent. The asphalt mixture comprises the following raw materials in parts by weight: 1-5 parts of the thermosetting modification asphalt mixture additive, 2-8 parts of matrix asphalt or modified asphalt and 87-97 parts of mineral aggregates. The thermosetting modification asphalt mixture additive prepared in the present invention adopts a dry-method modification technology, the prepared modifier is powdery, has a small grain diameter and is easy to disperse in the asphalt mixture; the asphalt mixture prepared from the modifier is simple in operation process, can be continuously produced and is low in cost.

IPC Classes  ?

• C08L 63/00 - Compositions of epoxy resinsCompositions of derivatives of epoxy resins
• C08L 95/00 - Compositions of bituminous materials, e.g. asphalt, tar or pitch
• E01C 7/26 - Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre

Abstract

An auxiliary component for pavement construction comprises a cylinder (11), a base plate (12) and a leveling bolt (13). The cylinder (11) comprises a first cylinder part (11a) and a second cylinder part (11b) connecting and communicating with each other. The first cylinder part (11a) is provided with a hanger installing part and a slurry inlet. The bottom part of the second cylinder part (11b) is connected with the base plate (12). The base plate (12) is provided with a bolt extending hole (14) and a slurry discharging hole (15) which are communicated with the inner cavity of the second cylinder part (11b). The leveling bolt (13) comprises a bolt head (13a) and a screw (13b). The screw (13b) is arranged through the bolt extending hole (14). The bolt head (13a) is located in the second cylinder part (11b). The diameter of the bolt head (13a) is less than the inner diameter of the second cylinder part (11b). The invention also provides a concrete slab installed with the auxiliary component for pavement construction and a method of pavement construction. The auxiliary component for pavement construction improves leveling efficiency and durability by grouting the hollow area at the bottom of the base plate (12).

IPC Classes  ?

• E01C 19/52 - Apparatus for laying individual preformed surface elements, e.g. kerbs
• E01C 5/06 - Pavings made of prefabricated single units made of units with cement or like binders