895 results about "Highway engineering" patented technology

The invention relates to the research field of asphalt pavement materials and structures in highway engineering, and discloses a torsional shear test device for asphalt pavement materials and structures, which is characterized in that it includes a machine base, a reaction force frame arranged on the machine base, and a The worm gear mechanism at the bottom of the reaction force frame, the worm input end of the worm gear mechanism is connected to the pressure motor, the output end of the worm gear is connected to the lower support plate for clamping the test piece, and the pressure sensor is arranged on the lower support plate; the reaction force frame A torque motor is arranged on the top, and the output shaft of the torque motor is connected downwards to the disc torque sensor and the upper support plate for clamping the specimen in turn.

The invention discloses a method for building a highway road bed with waste steel residues. The method comprises the steps: firstly, waste steel residues are adopted to build the road bed; secondly, the building speed of the road bed built with waste steel residues is required to be controlled to guarantee the road bed stability; thirdly, the road embankment built with waste steel residues is compacted by a vibratory road leveling machine in layers, during the compacting, the waste steel residues shall be in the optimum moisture content scope, through the trial road section method, the appropriate compacting machines and tools are determined, and the maximum dry density and the optimum moisture content are adopted as the compaction degree calculating standard in the road bed built with waste steel residues; and fourthly, the cross section design of the waste steel residue road embankment comprises the road embankment height, the side slope ratio of the road embankment, the building layer thickness, a top sealing layer, a bottom sealing layer, an intercalated layer, the slope protection and a drainage system. The invention has the advantages that the method is easy, the operation is convenient, the waste steel residue piling ground and the environmental pollution are reduced, the wastes are changed into valuables, the environmental protection is promoted, the method solves the problem that the highway engineering packing material is inadequate, the cost is low, and the quality of the built road bed can satisfy the construction requirements of the road bed of the higher grade highway.

The invention relates to a rubber-cement grouting material applied to a semi-flexible pavement, belonging to waste recycling field in the environmental protection field and the application field of highway engineering. The rubber-cement grouting material applied to the semi-flexible pavement is characterized by being formed by mixing the components based on parts by weight: 100 parts of cement, 10-50 parts of pulverized fuel ash, 5-30 parts of expanding agent, 1-30 parts of rubber powder, 10-50 parts of sand, 0.1-5 parts of water reducing agent, 0.1-5 parts of early strength agent and 40-70 parts of water. The rubber-cement grouting material has high fluidity and anti-cracking property, lower contraction and higher early strength, and can meet the groutability and pavement performance of the semi-flexible pavement material.

The invention provides a highway engineering project supervision system. The highway engineering project supervision system includes a real-time monitoring module, a project management module, an information management module and a configuration module; a highway engineering project electronic archive is constructed, the videos, files and data are integrated and archived so as to be managed; real-time remote video monitoring is performed on the construction site of an engineering project based on a plurality of kinds of out-field monitoring equipment; and work attendance check management on the field supervision staff of the project and management on the related files of the engineering project are realized. According to the system, whole-process tracking and supervision of the highway engineering project is carried out from a plurality of highway project implementation related links, such as engineering field, staff presence, engineering process and file archiving, and therefore, process-based high-quality completion of the highway engineering project can be ensured through a standardized supervision flow, time and labor costs required to be invested into the supervision of the engineering project can be effectively decreased, and an intelligent supervision means and tool can be provided for engineering project supervision departments.

The present invention discloses process of excavating high road cutting slope of broken soft rock in railway and highway engineering. The excavation process features dividing the road cutting into several upper and lower excavation layers, excavating one layer by one layer from the top to the bottom, performing slope protection to each excavated layer, and pre-reinforcing the slope in the layer to be excavated. The excavation process of the present invention including the technological measures of stepped excavation, stepped stabilizing and pre-reinforcing can avoid erosion and weathering in the slope and stabilize the excavated slope.

The invention relates to an on-line monitoring method for settlement and convergence in building construction and operation periods, in particular relates to a laser displacement sensor-based on-line monitoring method for the settlement and the convergence in a construction process and an operation period of vault crowns and haunches of tunnel and subway buildings, and belongs to the fields of building and highway engineering, and applied to the industry of structural safety and health monitoring. The online monitoring method disclosed by the invention can be used for solving problems of complex installation, expensive equipment, great outside influence on the structure, high requirement on installation and using environments and the like in known methods for on-line monitoring of the vault crown settlement of tunnels and subways in construction and operation periods.

The invention discloses a waste rubber powder modified asphalt composition and a preparation method thereof. The waste rubber powder modified asphalt composition comprises the following components in percentage by weight: 60-94 percent of basic asphalt and 6-20 percent of activated waste rubber powder. The preparation method comprises the following steps: adding the activated waste rubber powder into the melted basic asphalt for fully mixing to obtain the waste rubber powder modified asphalt composition. The asphalt composition disclosed by the invention is high in storage stability and low in cost, and the raw materials are easily available; the asphalt component has a wide application prospect in the fields of road engineering, waterproof coiled materials and the like.

The invention discloses a chemical improved method to harness swelled ground, which comprises the following steps: allocating swelled ground PAS chemical modifying agent with silicate of soda + basic ion polyacrylamide + water; spraying modifying agent on swelled ground body; changing, linking, bundling, birdnesting, and jelling with ground body particle ion; forming space network structure; increasing physical mechanics property and engineering feature of swelled ground; meeting engineering construction demand of swelled ground. This invention possesses good water stable effect and even modification, which is fit for construction foundation treatment, highway engineering earth bank, slope harness and so on swelled ground project.

A highway network traffic investigation data acquisition and analysis application system is composed of a traffic dynamic information auto-acquisition unit and a monitoring unit, wherein the traffic dynamic information acquisition unit is connected with the monitoring unit in virtue of a data transmission network; the working method is divided into a highway network OD data generation unit, a highway network traffic demand analysis and prediction unit, a highway network traffic distribution and network evaluation unit, a highway network planning unit, a highway project feasibility research and post-evaluation unit and a highway network operation management unit. The highway network traffic investigation data acquisition and analysis application system has the advantages of: (1) real-time, accurate and objective acquisition of highway information; (2) displaying the acquired and analyzed traffic information in image form on GIS; (3) providing maintenance management decision and planning construction decision of highways with basic database and theory support; (4) proving the public with main data basis of travel and induction service; (5) comprehensively acquiring data, and effectively and rationally selecting the data information, thereby providing a scientific and standard traffic investigation report.

The invention discloses a highway reorganization and expansion surveying method and relates to the fields of surveying and mapping and highway engineering design. The method comprises the following steps of: laying a ground target control point, and acquiring a three-dimensional space coordinate; performing vehicle-mounted movable laser scanning measurement, and acquiring a vehicle-mounted measured original data result; taking the three-dimensional space coordinate of the ground target control point as a reference, performing data processing on vehicle-mounted point cloud in the vehicle-mounted measured original data result, and acquiring a high-precision vehicle-mounted ground point cloud; establishing a first triangulation network for the high-precision vehicle-mounted ground point cloud, and generating a highway pavement digital elevation model; performing survey area vehicle-mounted LIDAR aerial survey, and acquiring a vehicle-mounted measured original data result; acquiring a digital elevation model and a high-precision central pile cross section map by using a 1:2000 measuring scale according to the vehicle-mounted measured original data result; and taking the vehicle-mounted measured original data result as the basis, and manufacturing digital line graphs by using the 1:2000 measuring scale in a respective 300m range on two sides of the highway by integrating the vehicle-mounted ground point cloud and digital aerial photos.

The invention relates to high-intensity low-crack cement-stabilized graded macadam and a preparation method thereof, belonging to the field of highway engineering design. The mineral aggregate gradation of the high-intensity low-crack cement-stabilized graded macadam is 5-6 grade, wherein the 4.75mm pass ratio is 35-40%, and the crushing value of large-particle macadam is lower than 22%. By adopting the above technical scheme, the invention has the following beneficial effects: (1) the 7d unconfined compressive strength of the cement-stabilized graded macadam is increased to 6-8MPa; and (2) the coefficient of shrinkage of the cement-stabilized graded macadam is decreased to 0.008-0.013. Therefore, the technical advantages of high intensity and low shrinkage crack of mixture are achieved; the macadam of the invention is applied to building the road surface with long service life, in this way, the bearing property of the road surface is improved, and the service life of the road surfaceis prolonged.

The invention discloses a line marking vehicle and relates to the field of highway engineering maintenance. The line marking vehicle comprises a vehicle body, and further comprises a storage battery, a coating placing device, a coating storage barrel, a front camera and a rear camera which are arranged on the vehicle body. The front camera and the rear camera are installed on the head and the tail of the vehicle body correspondingly. The coating placing device is located in front of the coating storage barrel. The outer side of the coating placing device is coated with a heat emission device. A stirring device is arranged in the coating placing device and connected with a stirring motor. The vehicle body is further provided with a control device and a steering device, and an electronic display screen is installed on the steering device. The heat emission device, the stirring motor and the electronic display screen are all in electric connection with the storage battery. According to the line marking vehicle, the road condition in front of the line marking vehicle is monitored conveniently through the front camera, a marked line marked on a road face by the line marking vehicle is monitored through the rear camera, finally real-time monitoring is conducted through the electronic display screen, and thus visual fatigue of people to the road face is reduced.

The invention relates to a metallocene geomembrane which is used for railway laying, a refuse landfill, a tunnel, a penstock, a reservoir, a dyke, a sewage tank, an ecological tank, a landscape lake, an aquiculture tank and the seepage resistance and the water resistance of railway and highway engineering and is prepared by ingredients through a coextrusion machine. The metallocene geomembrane is characterized by comprising the following components by the weight percent: 64 to 73 of metallocene linearity low-density polyethylene, 24 to 32 of high-density polyethylene and 0.1 to 3 of assistant, wherein the assistant comprises a modifying assistant and a processing assistant, the modifying assistant is the antioxidant, and the processing assistant is carbon black or PPA. The Metallocene geomembrane has good puncture resistance, good,anti-tear property and high tensile strength.

The invention discloses a preparation method of a high-performance warm-mix regenerated asphalt mixture, which comprises the following steps: extracting and screening an old asphalt mixture, determining the size distribution and asphalt content of the mixture, carrying out three-main-index testing on the asphalt, and evaluating old asphalt performance indexes in RAP; determining the doping proportion of the RAP according to the performance indexes of the asphalt in the RAP, wherein the doping proportion is generally 50-100%, and the doping proportion can be higher as the performance indexes of the asphalt in the RAP are higher; determining the optimal doped new asphalt consumption (OACn) of the asphalt mixture by a conventional asphalt mixture Marshall five-point process; and after calculating the doped new asphalt consumption, detecting according to according to the performance indexes specified in Asphalt Pavement Construction Technique Specifications (JTGF40-2004) by a testing method specified in Highway Engineering Asphalt and Asphalt Mixture Test Specifications (JTGE20-2011).

The invention discloses a test apparatus for simulating actual pavement cracking through cracks. The apparatus comprises a testing machine (7), a measure system (8), an environment case (3), a data acquisition system (6) and a bituminous paving simulation platform (9) arranged in the environment case (3). Meanwhile, the invention provides a test method for simulating actual pavement cracking through cracks. The invention has characteristics of simple operation and high data accuracy, and is suitable for the technical field of crack resistance research on bituminous paving of road engineering.

The invention belongs to the technical field of digital management. The invention relates to an electronic sand table system based on BIM + GIS, which comprises a BIM three-dimensional module, an unmanned aerial vehicle surveying and mapping module, a GIS data module and an electronic sand table system. BIM three-dimensional module is used to establish visual BIM model according to two-dimensionaldesign drawings. The unmanned aerial vehicle (UAV) surveying and mapping module is used for acquiring 3D terrain data of construction area and image data of construction stage. GIS data module is usefor storing GIS data. The electronic sand table system is used to establish the electronic sand table based on the BIM model, the three-dimensional terrain data of the construction area, the image data of the construction stage and the GIS data. Highway engineering management information platform is used to generate the operation interface of electronic sand table based on 3D GIS. The invention is used for realizing the visualization display of the whole landform of the construction area in the three-dimensional geographic information space from the global angle, and has the characteristics of digitalization, visualization and intelligence.

The invention discloses a method for metering carbon emission of roads in the whole life cycle. The carbon emission of the roads in the whole life cycle relates to carbon emission directly related to construction and use of road engineering in the whole life cycle in the carbon emission caused by social activities, and the whole life cycle includes the early building stage, the construction stage, the operation stage, the maintenance stage and the dismantling stage. The results of multiple embodiments of the method indicate that carbon emission of the roads is effectively evaluated, and the method for building of load-carbon model roads provides reference for further construction of low-carbon roads. In view of realizing low-carbon emission, a basis system of carbon metering and evaluating for the roads is established, research and construction progress of the low-carbon roads is boosted greatly, deterioration of the environment due to carbon emission of the social activities is alleviated, and the method has great contribution for realizing low-carbon emission and emission reduction.

The invention discloses a modified phosphogypsum highway subgrade filler and a preparation method thereof. The method comprises the following steps: aging phosphogypsum for more than 5 days to obtain a material A; calcining the material A at 160-200 DEG C for 1.5-2.5 hours to obtain a material B, and naturally cooling the material B; uniformly mixing 91-93 wt% of the material A and 7-9 wt% of the material B to obtain a material C; and adding water, which accounts for 12-16 wt% of the material C, into the material C, and stirring uniformly to obtain the modified phosphogypsum highway subgrade filler. The phosphogypsum is calcined at controlled temperature for controlled time according to the chemical characteristics of the calcined phosphogypsum to obtain the modifier, thereby enhancing the gelation property in the phosphogypsum, improving the stability and water resistance of the internal structure and obtaining the subgrade filler satisfying the highway engineering requirements. The modified phosphogypsum highway subgrade filler effectively solves the problem that the existing phosphogypsum is restricted to the local doping materials and is low in consumption.

The invention discloses a soil sampling device for highway engineering. The soil sampling device comprises a base, a top plate, hydraulic devices and guide rods; the hydraulic devices are arranged ontwo sides of the top part of the base, and the hydraulic devices are connected to the guide rods through supporting plates; the top plate is installed between the top parts of the guide rods; connecting sleeves are installed at the bottom part of the base, supporting legs are installed at the bottom parts of the connecting sleeves, and universal wheels are installed at the bottom parts of the supporting legs; a motor is installed at the top part of the top plate, and the output end of the motor is connected to a main gear through a coupler; and spiral rotating shafts penetrating through sampling cylinders are connected to the bottom parts of the main gear, a first auxiliary gear and a second auxiliary gear, and the bottom parts of the three sampling cylinders are connected to sampling tubes. According to the soil sampling device, sampling can be performed three groups at the same time, so that the sampling efficiency is high, and the continuity of sampling is improved; the universal wheels are installed at the bottom part of the device, so that the sampling device is convenient to move; and spring structures are connected between the connecting sleeves and the supporting legs, so that the influence of vibration on sampling is reduced.

The invention discloses a short-term monitoring and bearing capacity evaluation method for existing bridges, and belongs to the technical field of highway engineering detection. The method comprises determining a loaded verification coefficient by a quasi-static equivalent load test; determining the static dynamic characteristics of a bridge by a dynamic equivalent load test and an operation loadtest, wherein the quasi-static equivalent load test includes the determination of a test type, the determination of an equivalent vehicle and the installation and commissioning process of a sensor; performing the equivalent load test and the operation load test; performing data acquisition and data processing. The method provided by the invention has less investment in practical application, but has high technical added value; has little impact on traffic, can achieve monitoring and evaluation without traffic interruption, and has a large amount of data that can be processed, complete information, and high evaluation accuracy.

The invention provides an assembly type hydraulic box culvert template and a construction method of a prefabricated assembly type box culvert of the assembly type hydraulic box culvert template, and belongs to the field of highway engineering construction. The assembly type hydraulic box culvert template comprises a template, a hydraulic power system and an adjusting support. The construction method comprises the steps that the assembly type hydraulic box culvert template is installed; the template is used; steel bars are machined and installed; a steel bar framework is hoisted put into the template; an internal mold is installed; the template is installed while concrete is poured; the concrete is poured; the concrete is cured; and the template is removed, and finally the prefabricated assembly type box culvert is prepared. The box culvert can be prefabricated in a centralized mode, and is installed on site, so that a lot of concrete is saved, the construction progress is accelerated,construction cost is reduced, damage and pollution to underground water and soil are greatly reduced, and the box culvert is especially prominent in green and environment-protecting aspects; and the entity quality of culverts is effectively improved, the yield of the appearance and a protection layer is greatly improved, and good economic and social benefits are obtained.