A full-scale accelerated loading test path system and test method

Abstract

This invention provides a full-scale accelerated loading test road system and method, relating to the field of road engineering technology. The system includes: a test road having, from bottom to top, a pebble layer, a soil layer, a road base layer, and a pavement layer; a maintenance access road located between two test roads, with a drainage ditch beneath it; a temperature control module including a thermal insulation structure and temperature regulating pipes, the thermal insulation structure being located at the bottom and sides of the test road, and the temperature regulating pipes being arranged inside the test road; and a water level control module including a water level regulating pipe, a water tank, and a water level sensor, the water level regulating pipe being laid inside the pebble layer, the water tank being connected to the water level regulating pipe, and the water level sensor being located in the water tank. The full-scale test road avoids the boundary effects of scaled-down roads, and the temperature and water level control modules can simulate the influence of ambient temperature and groundwater level on the road, improving the referentiality of the experimental results.

Description

Technical Field

[0001] This invention relates to the field of road engineering technology, and in particular to a full-scale accelerated loading test road system and test method. Background Technology

[0002] Roads in different regions have significantly different environments and exhibit their own characteristics. For example, some regions have low winter temperatures, making road surfaces prone to freezing and cracking; some regions have high summer temperatures, making road surfaces prone to rutting; and some regions have strong ultraviolet radiation, causing asphalt pavements to age. As roads in different regions gradually reveal problems during their service life, full-scale testing is an effective method to explore the safe service conditions of roads under conditions such as extreme cold, high temperature, high ultraviolet radiation, high humidity, and different groundwater levels.

[0003] Currently, road research usually involves designing scaled-down roads, which have boundary effects and cannot reflect real road surface conditions. Furthermore, road surface temperature and groundwater level cannot be adjusted, resulting in experimental designs that differ significantly from reality and experimental results that are not easily referential. Summary of the Invention

[0004] To address the technical problems of existing technologies that typically involve designing scaled-down roads for road studies, which suffer from boundary effects and fail to reflect real-world road conditions, and whose road surface temperature and groundwater levels cannot be adjusted, resulting in experimental designs that deviate significantly from reality and unreliable experimental results, this invention provides a full-scale accelerated loading test road system and method. The technical solution is as follows:

[0005] On the one hand, a full-scale accelerated loading test track system is provided, optionally, the system includes:

[0006] The test road has, from bottom to top, a pebble layer, a soil layer, a road base layer, and a road surface layer;

[0007] A maintenance access road is provided between the two test roads, and a drainage ditch is provided below the maintenance access road.

[0008] A temperature control module, comprising a thermal insulation structure and a temperature regulating pipeline, wherein the thermal insulation structure is disposed at the bottom and on both sides of the test path, and the temperature regulating pipeline is arranged inside the test path;

[0009] The water level control module includes a water level regulating pipeline, a water tank, and a water level sensor. The water level regulating pipeline is laid inside the pebble layer, the water tank is connected to the water level regulating pipeline, and the water level sensor is installed in the water tank.

[0010] Optionally, the water level regulating pipeline includes a seepage pipeline and a drainage pipeline, the seepage pipeline is connected to the water tank, and the seepage pipeline, the sump and the drainage pipeline are connected in sequence;

[0011] The water level control module further includes a controller, which is communicatively connected to the water level sensor and the water level regulating pipeline. The controller is used to control water seepage or drainage in the test path based on the water level data transmitted by the water level sensor.

[0012] Optionally, the water level regulating pipeline further includes a water replenishment pipeline connected to the water tank, and the controller is further configured to control the water replenishment pipeline to replenish water to the water tank based on the water level data transmitted by the water level sensor.

[0013] Optionally, the water level control module further includes: a seepage pressure sensor, which is arranged in an array within the pebble layer, the soil layer and the roadbed, and the seepage pressure sensor is communicatively connected to the controller.

[0014] Optionally, the temperature control module further includes a temperature sensor arranged in an array within the soil layer and the roadbed.

[0015] Optionally, the temperature regulating pipeline includes a heating pipeline and a cooling pipeline;

[0016] The temperature control module also includes:

[0017] Refrigeration units, cooling water pump modules, circulating water pump modules, plate heat exchangers, and boiler hot water supply pipelines;

[0018] The refrigeration unit is connected to the cooling water pump module, and the cooling water pump module is connected to the cooling pipeline through a refrigeration control valve.

[0019] The heating end of the plate heat exchanger is connected to the boiler hot water supply pipeline, and the output end of the plate heat exchanger is connected to the heating pipeline through a heating control valve.

[0020] The circulating water pump is connected to the input end of the chiller unit, the input end of the plate heat exchanger, the cooling pipeline, and the heating pipeline, respectively.

[0021] Optionally, the thermal insulation structure adopts a composite shear wall;

[0022] The composite shear wall comprises two concrete layers and a polystyrene insulation board located between the two concrete layers.

[0023] Optionally, the composite shear wall further includes a waterproof layer, which is laid on the outside of the concrete layer.

[0024] Optionally, the top of the maintenance passage has a grille cover, and the grille cover is provided with a skylight.

[0025] On the one hand, a full-scale accelerated loading test method is provided, the method comprising:

[0026] Acceleration loading force is applied to the road surface to simulate the impact of actual traffic load on the road surface;

[0027] The temperature control module monitors and controls the temperature changes inside the test path during the test.

[0028] The groundwater level was monitored and adjusted in real time using a water level control module to study the impact of different groundwater levels on pavement performance.

[0029] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0030] The full-scale accelerated loading test road system provided by this invention avoids the boundary effects of scaled-down roads and can reflect real road surface conditions. By setting temperature control and water level control modules inside the test road, the control of temperature and water level can be ensured, thereby simulating the impact of different regional ambient temperatures and groundwater levels on the road. This allows the experimental design to simulate real-world conditions and improves the referenceability of the experimental results. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is one of the structural schematic diagrams of a full-scale accelerated loading test track system provided in an embodiment of the present invention;

[0033] Figure 2 This is the second schematic diagram of a full-scale accelerated loading test track system provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the thermal insulation structure 310 of a full-scale accelerated loading test track system provided in an embodiment of the present invention;

[0035] Figure 4 This is a diagram of a roadbed temperature control system provided in an embodiment of the present invention;

[0036] Figure 5 This is a side view of a temperature control module 300 provided in an embodiment of the present invention;

[0037] Figure 6 This is a top view of a temperature control module 300 provided in an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of a water level control module 400 provided in an embodiment of the present invention;

[0039] Figure 8 This is a layout diagram of a water level control module 400 provided in an embodiment of the present invention;

[0040] Figure 9 This is a partial layout diagram of a water level control module 400 provided in an embodiment of the present invention;

[0041] Figure 10 This is a partial layout diagram of a water level control module 400 provided in an embodiment of the present invention;

[0042] Figure 11 This is provided by the embodiments of the present invention. Figure 10 Enlarged view of point A in the middle;

[0043] Figure 12 This is provided by the embodiments of the present invention. Figure 10 Enlarged view of point B in the middle;

[0044] Figure 13 This is a flowchart of a full-scale accelerated loading test method provided in an embodiment of the present invention.

[0045] Figure label:

[0046] 100. Test road; 110. Pebble layer; 120. Soil layer; 130. Road base layer; 140. Road surface; 150. Inflatable sealing gasket; 160. Track;

[0047] 200. Maintenance access; 210. Drainage ditch; 220. Skylight;

[0048] 300. Temperature control module; 310. Thermal insulation structure; 311. Concrete layer; 312. Polystyrene insulation board; 320. Temperature regulation pipeline; 321. Heating pipeline; 322. Cooling pipeline; 330. Temperature sensor; 340. Refrigeration unit; 350. Cooling water pump module; 360. Circulating water pump module; 370. Plate heat exchanger; 380. Boiler hot water supply pipeline;

[0049] 400. Water level control module; 410. Water level sensor; 420. Water tank; 421. Main control solenoid valve; 422. Manual valve; 430. Water level regulating pipeline; 431. Water supply pipeline; 4311. Water supply valve; 432. Drainage pipeline; 433. Water inlet; 434. Sump; 435. Leakage pipeline; 4351. Drain valve; 4352. Sewage valve;

[0050] 510. Data acquisition pipeline. Detailed Implementation

[0051] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0052] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0053] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0054] Figure 1 This is one of the structural schematic diagrams of a full-scale accelerated loading test track system provided in an embodiment of the present invention. Figure 2 This is the second schematic diagram of a full-scale accelerated loading test track system provided in an embodiment of the present invention. Please refer to [the original text]. Figures 1 to 2 This invention provides a full-scale accelerated loading test track system, comprising: a test track 100, a maintenance passage 200, a temperature control module 300, and a water level control module 400. The test track 100 is used for accelerated loading tests, the maintenance passage 200 is used for maintenance, the temperature control module 300 is used to regulate the temperature inside the test track 100, and the water level control module 400 is used to regulate the groundwater level inside the test track 100. This system simulates different temperatures and groundwater levels to obtain corresponding test results.

[0055] The test road 100 is a full-scale test road, providing on-site road conditions, avoiding the influence of road boundary effects, simulating the real road structure, providing a reliable test platform for accelerated loading tests, and bearing and transferring vehicle loads to evaluate the mechanical properties and durability of the pavement 140 and base course. The test road 100 has, from bottom to top, a pebble layer 110, a soil layer 120, a base course 130, and a pavement 140. Specifically, the pebble layer 110 is located at the bottom and mainly serves to drain, isolate, and enhance the bearing capacity of the foundation. The pebble layer 110 effectively disperses the superstructure load, reduces foundation settlement, and prevents groundwater erosion of the base course 130. The soil layer 120, located above the pebble layer 110, simulates the natural soil environment; its thickness and properties can be adjusted according to test requirements to simulate road performance under different geological conditions. The base course 130, located above the soil layer 120, is made of specific materials such as crushed stone and gravel, compacted and is the main load-bearing layer of the pavement 140 structure. Road surface 140 is located at the top layer and directly bears the vehicle load and the influence of the natural environment. It is usually composed of materials such as asphalt concrete or cement concrete. Different road surface 140 structures and materials can be selected according to the test requirements.

[0056] Furthermore, the maintenance passage 200 is located between the two test roads 100, which facilitates the maintenance and repair of the test equipment. The maintenance passage 200 has a drainage ditch 210 underneath, which is used to collect and discharge sewage or rainwater generated during the maintenance process to prevent water accumulation from affecting the test road 100.

[0057] The temperature control module 300 in the roadbed structure adopts a thermal insulation design to maintain and control the set temperature environment conditions. The temperature control module 300 includes a thermal insulation structure 310 and a temperature regulating pipeline 320. The thermal insulation structure 310 is installed at the bottom and sides of the test road 100 to reduce the impact of external environmental temperature fluctuations on the internal temperature of the test road 100. The temperature regulating pipeline 320 is arranged inside the test road 100, specifically in the road base layer 130 or the pavement layer 140, and controls the internal temperature of the test road 100 through the heating or cooling of circulating fluid. For example, the temperature regulating pipeline 320 can be a stainless steel heat exchange coil.

[0058] The water level control module 400 includes a water level regulating pipe 430, a water tank 420, and a water level sensor 410. The water level regulating pipe 430 is laid inside the pebble layer 110 and contacts the soil layer 120 to simulate the rise and fall of groundwater levels. Utilizing the principle of a U-shaped connector, the water tank 420 is connected to the water level regulating pipe 430, ensuring that the liquid level in the water tank 420 matches the water level in the test road 100. The water level in the test road 100 is controlled by adjusting the water volume in the water tank 420, simulating road environments under different groundwater level conditions. The water level sensor 410 is installed in the water tank 420 to monitor water level changes in real time for operators to view, providing accurate groundwater level data for the experiment and aiding in the analysis of the impact of groundwater levels on the pavement structure 140.

[0059] The full-scale accelerated loading test road system provided by this invention avoids the boundary effects of scaled-down roads and can reflect real pavement conditions. By setting a temperature control module 300 and a water level control module 400 in the roadbed, the temperature and groundwater in the road environment can be controlled. This allows for the study of road service safety issues under temperature and groundwater conditions. It can be used to control and simulate the internal temperature gradient of the pavement structure in special regional climates, roadbed saturation, and winter freeze-thaw cycles of the pavement, which are close to real working conditions. This improves the simulation capabilities of road infrastructure service and enhances the operational support capabilities of road traffic infrastructure.

[0060] Furthermore, the full-scale accelerated loading test road 100 of the present invention may include two test roads 100 and a maintenance passage 200 located between the test roads 100. The test road 100 consists of a pebble layer 110, a soil layer 120, a road base layer 130, and a pavement 140. For example, the test road 100 may be a parallel double lane, each 12m long and 4.5m wide, with the width of the test road 100 greater than the width of a single lane, and an effective loading length of 8m. Simultaneously, it allows for the interchangeable loading of two types of pavement 140, providing a strong foundation for conducting service safety studies of different pavement 140 materials under the same loading conditions.

[0061] The full-scale accelerated loading test track system includes two test tracks 100 and a maintenance passage 200. The environment of the full-scale accelerated loading test track 100 is controllable, and it adopts a thermal insulation design to maintain and control the set environmental conditions. See Appendix 1 for the model diagram.

[0062] Please see Figure 5 In one embodiment of the present invention, the water level regulating pipeline 430 includes a seepage pipeline 435 and a drainage pipeline 432. The inlet 433 of the seepage pipeline 435 is connected to the water tank 420, and the seepage pipeline 435, the sump 434 and the drainage pipeline 432 are connected in sequence.

[0063] Specifically, a seepage pipe 435 is laid in the pebble layer 110, connecting to the water tank 420 using the principle of communicating vessels, to control the groundwater level. The outer layer of the seepage pipe 435 consists of the pebble layer 110 and a sand layer, facilitating water seepage and preventing blockage of the seepage outlet. Water flowing out of the seepage pipe 435 raises the groundwater level and collects in the sump 434.

[0064] When it is necessary to lower the groundwater level, the drainage pipe 432 is responsible for draining excess water from the sump 434. The drainage pipe 432 is typically connected to a pre-installed drainage facility, such as a sewer or recycling tank, and is equipped with the necessary valves and control devices.

[0065] For further details, please see Figure 12 The seepage pipe 435 is also equipped with a drain valve 4352, which is used to discharge sludge and other substances accumulated in the pipe.

[0066] The water level control module 400 also includes a controller, which is communicatively connected to the water level sensor 410 and the water level regulating pipeline 430. Specifically, the controller can be connected to the water level sensor 410 and the water level regulating pipeline 430 through a data acquisition pipeline 510. The controller is used to control the seepage or drainage in the test circuit 100 based on the water level data transmitted by the water level sensor 410, specifically including outputting water from the water tank 420 to the seepage pipeline 435 and draining water through the drainage pipeline 432.

[0067] The water level sensor 410 can be implemented through different physical principles, such as float type, pressure type, capacitive type, etc. This embodiment does not limit it. The water level sensor 410 can accurately convert water level information into electrical signals or other transmittable signal forms and transmit them to the controller for subsequent processing.

[0068] The controller receives data from the water level sensor 410 and processes it according to preset logic or algorithms. Specifically, the controller can analyze the data transmitted by the water level sensor 410 to determine whether the current water level is higher, lower, or equal to a preset threshold. Based on the data analysis results, the controller outputs whether water replenishment or drainage measures are needed, as well as specific operating parameters, such as water replenishment rate and volume. By sending control signals to the water level regulating pipeline 430, the automatic regulation of the water level in the water tank 420 is achieved. Specifically, this includes, but is not limited to, starting or stopping the water pump and adjusting the valve opening.

[0069] The aforementioned water level regulating pipeline 430 can include various components such as water pumps, valves, and filters to ensure the timeliness, effectiveness, and cleanliness of water replenishment.

[0070] When the water level sensor 410 detects that the water level in the water tank 420 is lower than the preset lower limit, it transmits this information to the controller. Upon receiving the signal, the controller immediately initiates a water replenishment procedure, introducing external water into the water tank 420 by controlling the water pump or valve in the water level regulating pipeline 430 until the water level returns to the preset range. Similarly, if the water level is too high, the controller will also take corresponding drainage measures to ensure the water level in the water tank 420 remains within the preset range.

[0071] The water level control module 400 in this embodiment of the invention integrates key components such as water level sensor 410, controller and water level regulating pipeline 430, to realize intelligent and automated management of the water level of test channel 100, effectively improving the stability and reliability of the system.

[0072] Furthermore, in one embodiment of the present invention, the water level regulating pipeline 430 further includes a water replenishment pipeline 431, which is connected to the water tank 420 and replenishes water to the water tank 420 through a water replenishment valve 4311. The controller is also used to control the water replenishment pipeline 431 to replenish water to the water tank 420 based on the water level data transmitted by the water level sensor 410, so as to ensure that the water level in the water tank 420 does not drop below a preset lower limit. The water replenishment pipeline 431 is typically connected to an external water source, such as tap water, a well, or a water storage tank, and is equipped with appropriate components such as a water pump, valve, and filter.

[0073] Furthermore, in one embodiment of the present invention, the water level control module 400 further includes: a seepage pressure sensor, which is arranged in an array within the pebble layer 110, the soil layer 120 and the roadbed 130, and the seepage pressure sensor is communicatively connected to the controller.

[0074] Among them, the osmotic pressure sensor is a sensor specifically designed to measure the pore water pressure in soil or rock strata. It can monitor changes in osmotic pressure in the soil in real time and convert these changes into a transmittable signal. By introducing the osmotic pressure sensor, a more comprehensive understanding of the osmotic pressure changes in the gravel layer 110, soil layer 120, and roadbed 130 can be obtained.

[0075] Please see Figures 5 to 6 In any of the above embodiments provided by the present invention, the temperature control module 300 further includes a temperature sensor 330, which is arranged in an array within the soil layer 120 and the roadbed 130.

[0076] Temperature sensor 330 can convert temperature information within test circuit 100 into a transmittable electrical signal or other signal form. This temperature data is crucial for evaluating the thermal performance, material response, and structural stability of test circuit 100 under different conditions.

[0077] By arranging temperature sensors 330 along an array within the test path 100, effective coverage of all areas within the test path 100 is ensured, thereby achieving comprehensive monitoring of temperature distribution. The coordinated operation of multiple temperature sensors 330 improves the accuracy and precision of temperature measurements. This helps reduce errors, making temperature control more refined and reliable. The temperature control module 300 can acquire temperature data in real time through the temperature sensors 330 to adjust the temperature control strategy, ensuring that the temperature within the test path 100 remains within a preset range.

[0078] For example, the temperature control range is -5~30°C, the temperature deviation is ≤±2°C, and the fluctuation is ≤2°C. The temperature sensor 330 can realize real-time monitoring of the roadbed temperature and provide feedback to the temperature control module 300.

[0079] For further details, please see Figure 4 In one embodiment of the present invention, the temperature regulating pipeline includes a heating pipeline 321 and a cooling pipeline 322;

[0080] The temperature control module 300 also includes: a refrigeration unit 340, a cooling water pump module 350, a circulating water pump module 360, a plate heat exchanger 370, and a boiler hot water supply pipeline 380.

[0081] The refrigeration unit 340 is connected to the cooling water pump module 350, which is connected to the cooling pipeline 322 through a refrigeration control valve for cooling the roadbed.

[0082] The heating end of the plate heat exchanger 370 is connected to the boiler hot water supply pipeline 380, and the output end of the plate heat exchanger 370 is connected to the heating pipeline 321 through the heating control valve for heating the roadbed.

[0083] The circulating water pump module 360 ​​is connected to the input end of the chiller unit 340, the input end of the plate heat exchanger 370, the cooling pipeline 322, and the heating pipeline 321 respectively, and is used for circulating water.

[0084] The refrigeration unit 340 achieves a cooling effect by compressing the refrigerant, causing it to release heat and liquefy in the condenser, and then absorbing heat and evaporating in the evaporator. The closed-circuit cooling tower is located on the roof of the laboratory building, avoiding direct impact from the external environment on the cooling effect and reducing noise and dust pollution. The closed-circuit cooling tower uses circulating water to isolate heat from the atmosphere, protecting water quality and extending equipment life. The cooling water pump module 350 transports the cooling capacity generated by the refrigeration unit 340 to areas or equipment requiring cooling via cooling water. The circulating water pump module 360 ​​recirculates water flowing through the roadbed, after heat dissipation or heat absorption, back to the refrigeration unit 340 or the plate heat exchanger 370, enabling water reuse. The plate heat exchanger 370 utilizes high-efficiency heat exchange plates to achieve rapid heat exchange between hot and cold fluids. In cooling mode, cooling water lowers the temperature of the circulating water through the heat exchanger; in heating mode, boiler hot water is used to heat the circulating water. The boiler hot water supply pipeline 380 provides the hot water required for heating the system, and the hot water is transported to the plate heat exchanger 370 for heat exchange through the heating pipeline.

[0085] Based on actual needs, the target temperature range and operating mode are set through the control system, such as cooling or heating. First, the cooling water pump module 350 and the circulating water pump module 360 ​​are started to ensure smooth water circulation; then, the chiller unit 340 or boiler is started, and cooling or heating begins according to the set mode. The control system monitors parameters such as indoor temperature, water flow temperature, and pressure in real time, and adjusts the equipment operating status accordingly based on feedback information to ensure the temperature remains stable within the set range.

[0086] Please see Figure 3 In one embodiment of the present invention, the thermal insulation structure 310 adopts a composite shear wall; the composite shear wall includes two concrete layers 311 and a polystyrene insulation board 312 located between the two concrete layers 311.

[0087] Specifically, thermal insulation can be achieved using a composite shear wall structure. A 100mm thick polystyrene insulation board (312) is sandwiched in a reinforced concrete middle layer, with concrete on both sides.

[0088] Furthermore, in one embodiment of the present invention, the composite shear wall also includes a waterproof layer, which is laid on the outside of the concrete layer 311.

[0089] Specifically, a waterproof layer is applied to the outer layer of concrete. The composite shear wall is equivalent to five layers: a waterproof layer, concrete, insulation board, and another waterproof layer. The waterproof layer helps maintain humidity within the composite shear wall, ensuring the accuracy of test results. By installing insulation and waterproofing structures inside the test road 100, temperature and water level control can be ensured, thereby simulating the impact of different regional ambient temperatures and groundwater levels on the road, and enabling the experimental design to simulate real-world conditions.

[0090] For details, please see Figure 7 The aforementioned water level control module 400 can simulate and control the groundwater level in the structural layer of test road 100. A waterproof layer is laid within test road 100 to establish a control range for groundwater level control. A seepage pipe 435 is laid in the pebble layer 110, and the groundwater level is controlled using the principle of communicating vessels. The water level control height of the water tank 420 in the intermediate corridor of test road 100 is the groundwater level height of test road 100. Stainless steel heat exchange coils are laid within test road 100 for regulation and control. The water level control module 400 includes a water supply pipe 431, a water tank 420, a seepage pipe 435, a sump 434, and a drainage pipe 432. The water level control range is -2 to 0 meters. The controller can automatically check and adjust the status of the water supply valve 4311 controlling the water inlet of the water tank 420 and the main control solenoid valve 421 controlling the water outlet of the water tank 420 according to the preset water level value, so as to realize real-time monitoring of groundwater in the roadbed and provide feedback to the water level control module 400.

[0091] It should be noted that both the water supply valve 4311 and the main control solenoid valve 421 are electrically controlled valves for automatic control. In this embodiment, two manual control valves are also included, which are connected in parallel with the water supply valve 4311 and the main control solenoid valve 421 respectively, for manual control.

[0092] Specifically, the test road 100 can be a straight test road. This design is conducive to achieving stable driving and precise control of the vehicle, while also facilitating data collection and analysis.

[0093] The full-scale accelerated loading test track 100 utilizes a composite shear wall structure for thermal insulation. The insulation structure of test track 100 is as follows: Figure 3 As shown, a reinforced concrete intermediate layer is sandwiched with a 100mm thick polystyrene insulation board 312, and the two sides are concrete. Here, 'a' is not less than 100mm, depending on the building structure design; for example, it can be 200mm, with 100mm thick internal filling. 100 steel wire 5 mesh panels, using 3. Diagonal steel wire reinforcing bars. b is insulation board, thickness adjustable according to building energy efficiency design. c is a 50mm thick concrete protective layer; for example, it can be filled internally with 50mm thick concrete. 50 steel wire 3. Mesh panels. Waterproof protection is applied to both inner and outer layers. Drainage holes and channels are installed in the central corridor of test track 100 to ensure water drainage within test track 100. There are two test tracks 100, arranged parallel to each other, with a central corridor between them for the arrangement and maintenance of test pipelines. A drainage ditch 210 is installed below the maintenance passage 200, covered with a grating plate. Three skylights 220 are installed in the top of the maintenance passage 200 to facilitate lighting and ventilation. Specific construction steps are as follows:

[0094] 1. Two parallel test paths 100 are arranged. The linear acceleration loading test device can be moved between the two test paths 100 via the track 160 to meet the requirements of alternating test.

[0095] 2. Each test road 100 is 12m long, 4.5m wide, and has an effective loading length of 8m.

[0096] 3. The surface structure materials, from top to bottom, are: 5cm thick SMA-16, 6cm thick dense-graded medium-grained asphalt concrete, and 7cm thick coarse-graveled asphalt concrete.

[0097] 4. The base structure from top to bottom consists of cement-stabilized crushed stone 18-20cm, cement-stabilized crushed stone (gravel) 18-20cm, and lime-fly ash stabilized crushed stone (or gravel) 15-20cm.

[0098] 5. Below the base layer is the soil layer.

[0099] The internal temperature control of the roadbed structure is accomplished by an underground environmental control system, which is divided into cooling control and heating control, specifically including cooling pipe 322 and heating pipe 321. The underground temperature control system consists of a chiller unit 340, a cooling water pump module 350, a circulating water pump module 360, a plate heat exchanger 370, and a boiler hot water supply pipe 380. The chiller unit 340 is housed in a closed-loop cooling tower on the roof of the experimental building.

[0100] The temperature of the roadbed structure is regulated and controlled by stainless steel heat exchange coils laid within the test road 100. A single circulating piping system is used for both cooling and heating, primarily to prevent excessively dense piping within the roadbed. An environmentally friendly refrigerant solution is used as the refrigerant, absorbing or releasing heat in the heat exchanger to control the internal temperature of the roadbed. High-temperature heating of the roadbed is provided by hot water from the boiler room, while low-temperature cooling is provided by refrigeration unit 340. Figures 5 to 6 As shown, a temperature regulating pipeline 320 is installed. For groundwater regulation, an air-filled sealing gasket 150, a shear wall, a protective layer, a drainage ditch 210, and a water level regulating device are installed, along with a water level regulating pipeline 430. The temperature control range is -5~30°C, with a temperature deviation ≤±2°C and a fluctuation ≤2°C.

[0101] The water level control module 400 simulates and controls the groundwater level in the structural layer of test road 100. A waterproof layer is laid within test road 100 to establish a control range for groundwater level control. A seepage pipe 435 is laid in the pebble layer 110, and the groundwater level is controlled using the principle of communicating vessels. The liquid level control height of the water tank 420 in the intermediate corridor of test road 100 is the groundwater level height of test road 100. (See the schematic diagram of the water level control module 400.) Figure 7 .

[0102] The water level control module 400 utilizes the principle of a U-shaped connector. The water level control module 400 includes a water supply pipe 431, a water tank 420, a seepage pipe 435, a sump 434, and a drainage pipe 432, etc. The water level control module 400's pipe network is shown below. Figures 8 to 12 .

[0103] Specifically, the outer lining layer of the seepage pipe 435 consists of a pebble layer 110 and a sand layer, facilitating water seepage and preventing blockage of the seepage outlet. During operation, after setting the groundwater level, the control system automatically checks whether the water supply valve 4311 of the water supply pipe 431 is normally open and whether the drainage valve 4321 of the drainage pipe 432 is normally closed. The controller compares the pressure sensor signal and the water tank 420 level signal. If the pressure sensor signal meets the requirements and the water tank 420 level is lower than the set level, the water supply valve 4311 opens to replenish water to the tank 420. Once the water level is reached, the water supply valve 4311 closes. When the water tank 420 level is higher than the set value, the water supply valve 4311 closes, and the main control solenoid valve 421 opens, draining water through the drainage pipe 432 until the set value is met, at which point the main control solenoid valve 421 closes. Furthermore, a manual valve 422 is connected in series on the outlet pipe of the water tank 420 for manual operation.

[0104] In one embodiment provided by the present invention, please refer to Figures 1 to 2 The maintenance passage 200 has a grid cover on top, and a skylight 220 is installed on the grid cover.

[0105] The grating cover prevents personnel from accidentally falling into the maintenance passage 200, providing necessary safety protection. Furthermore, the grating structure allows airflow, facilitating air circulation within the maintenance passage 200 and reducing moisture and odors.

[0106] The skylight 220 provides natural light to the maintenance passage 200 and the surrounding area, reducing the need for artificial lighting, lowering energy consumption, and also improving the brightness and comfort of the space.

[0107] This full-scale accelerated loading test track system mainly consists of a protective structure, a temperature control module 300, a water level control module 400, and a monitoring module. The monitoring module includes a water level sensor 410, a temperature sensor 330, and a pressure sensor. To regulate temperature and groundwater level, an insulation layer and a waterproof layer are designed. Additionally, to regulate and monitor temperature, a temperature regulation pipeline 320 is installed in the test track, and temperature sensors 330 are evenly distributed. To regulate and monitor water level, a groundwater regulation pipeline and a drainage pipeline 432 are designed within the soil.

[0108] The test road 100 features simulated extreme cold and high temperature environments as well as the influence of groundwater, and includes a multi-functional pavement 140 that considers the complex environment of the actual road. The temperature control module 300 enables uniform heating and cooling of the road, and monitors the temperature in real time via a temperature sensor 330; the water level control module 400 simulates groundwater levels in different regions, thus simulating high and low temperature conditions and freeze-thaw cycles within the pavement 140 structure.

[0109] Figure 13 This is a flowchart of a full-scale accelerated loading test method provided in an embodiment of the present invention. Please refer to [link / reference]. Figure 13 The present invention also provides a full-scale accelerated loading test method, the method comprising:

[0110] 1301. Apply an acceleration loading force to road surface 140 to simulate the impact of actual traffic load on road surface 140.

[0111] Among them, simulating the long-term effect of actual traffic load on road surface 140 can accelerate the damage process of road surface 140, so as to obtain the law and mechanism of road surface 140 damage in a shorter time.

[0112] Specifically, the aforementioned full-scale road surface 140 accelerated loading test system can be used. This system typically includes a paved test road section 100 and a load-bearing test vehicle traveling on that section. The load-bearing test vehicle repeatedly travels at a set speed and trajectory, applying controlled loads to the road surface 140. These loads can simulate the operation of different types and weights of vehicles on the road.

[0113] 1302. The temperature control module 300 monitors and controls the temperature changes inside the test path 100 during the test.

[0114] Specifically, the temperature control module 300 can adjust the temperature inside the test road section 100 to simulate roads under different temperatures, thereby testing them and understanding the impact of temperature changes on the performance of the road surface 140, including thermal expansion and contraction, material aging, etc.

[0115] Furthermore, temperature data is monitored and recorded in real time by temperature sensors 330 arranged inside section 100 of the test road and by temperature control module 300. This data can be used to analyze the specific impact of temperature on the performance of pavement 140 and to provide a scientific basis for the design of pavement 140.

[0116] 1303. Use the water level control module 400 to monitor and adjust the groundwater level in real time to study the impact of different groundwater levels on the performance of the pavement 140.

[0117] By monitoring and adjusting the groundwater level in real time, the impact of different groundwater levels on pavement performance can be studied, including the bearing capacity, deformation, and stability of the roadbed.

[0118] Specifically, the groundwater level is adjusted by the water level control module 400 installed inside the test road 100 to simulate the road under different water levels, thereby conducting tests.

[0119] The full-scale accelerated loading test method provided by this invention avoids the boundary effects of scaled-down roads and can reflect real road surface conditions. By setting temperature control and water level control modules inside the test road 100, the control of temperature and water level can be ensured, thereby simulating the impact of different regional ambient temperatures and groundwater levels on the road. This allows the experimental design to simulate real-world conditions and improves the referenceability of the experimental results.

[0120] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0121] In this invention, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be a single item or multiple items.

[0122] It should be understood that, in various embodiments of the present invention, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0123] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A full-scale accelerated loading test track system, characterized in that, The system includes: The test road has, from bottom to top, a pebble layer, a soil layer, a road base layer, and a road surface layer; A maintenance access road is provided between the two test roads, and a drainage ditch is provided below the maintenance access road. A temperature control module includes a thermal insulation structure, a temperature regulating pipeline, and a temperature sensor. The thermal insulation structure is installed at the bottom and both sides of the test path. The temperature regulating pipeline is arranged inside the test path and includes a heating pipeline and a cooling pipeline. The temperature sensor is arranged in an array inside the soil layer and the roadbed. A water level control module includes a water level regulating pipeline, a water tank, a water level sensor, a controller, and a seepage pressure sensor. The water level regulating pipeline is laid inside the pebble layer, the water tank is connected to the water level regulating pipeline, and the water level sensor is installed in the water tank. The water level regulating pipeline includes a seepage pipeline, a sump pit, and a drainage pipeline. The seepage pipeline is connected to the water tank, and the seepage pipeline, the sump pit, and the drainage pipeline are connected in sequence. The controller is communicatively connected to the water level sensor and the water level regulating pipeline. The controller is used to control water seepage or drainage in the test path based on the water level data transmitted by the water level sensor. The water level control module further includes: a seepage pressure sensor, which is arranged in an array within the pebble layer, the soil layer and the roadbed, and the seepage pressure sensor is communicatively connected to the controller; The temperature control module also includes: Refrigeration units, cooling water pump modules, circulating water pump modules, plate heat exchangers, and boiler hot water supply pipelines; The refrigeration unit is connected to the cooling water pump module, and the cooling water pump module is connected to the cooling pipeline through a refrigeration control valve. The heating end of the plate heat exchanger is connected to the boiler hot water supply pipeline, and the output end of the plate heat exchanger is connected to the heating pipeline through a heating control valve. The circulating water pump module is connected to the input end of the chiller unit, the input end of the plate heat exchanger, the cooling pipeline, and the heating pipeline, respectively.

2. The full-scale accelerated loading test track system according to claim 1, characterized in that, The water level regulating pipeline also includes a water replenishment pipeline, which is connected to the water tank. The controller is also used to control the water replenishment pipeline to replenish water to the water tank based on the water level data transmitted by the water level sensor.

3. The full-scale accelerated loading test track system according to claim 1, characterized in that, The thermal insulation structure adopts a composite shear wall; The composite shear wall comprises two concrete layers and a polystyrene insulation board located between the two concrete layers.

4. The full-scale accelerated loading test track system according to claim 3, characterized in that, The composite shear wall also includes a waterproof layer, which is laid on the outside of the concrete layer.

5. The full-scale accelerated loading test track system according to claim 1, characterized in that, The maintenance passage has a grating cover at the top, and a skylight is provided on the grating cover.

6. A full-scale accelerated loading test method, characterized in that, The method, applied to the full-scale accelerated loading test track system according to any one of claims 1 to 5, comprises: Acceleration loading force is applied to the road surface to simulate the impact of actual traffic load on the road surface; The temperature control module monitors and controls the temperature changes inside the test path during the test. The groundwater level was monitored and adjusted in real time using a water level control module to study the impact of different groundwater levels on pavement performance.

Images