Simulation device for cement concrete pavement void damage

Abstract

The utility model discloses a cement concrete pavement void disease simulation device, which comprises a road model, a load model, a rainfall model and a monitoring device, and is characterized in that the load model is arranged on the road model and can circularly move on the road model; the rainfall model is used for rainfall above the road model, and the rain contains tracer particles; the monitoring equipment comprises a pressure sensor, a camera, a laser generator and a computer, the pressure sensor is arranged in the road model and is in communication connection with the computer, the camera is arranged in the road model and is used for recording a road model change state diagram and capturing images of tracer particles, and the camera is in communication connection with the computer; the laser generator is used for irradiating the tracer particles; according to the utility model, a relatively complete means is provided for researching a cement concrete pavement void forming mechanism, and the obtained test result can provide a basis for preventing concrete pavement void diseases, prolonging the service life of the pavement and guaranteeing the service performance of the pavement.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of void disease research, especially to a simulation device for cement concrete pavement void disease. BACKGROUND

[0002] Due to the long service life, mature design method and construction technology and convenient material selection of cement concrete pavement, it dominates the airport pavement in China. According to incomplete statistics, nearly 90% of the existing airport pavements in China are cement concrete pavements. Void is a common disease of airport cement concrete pavement. According to statistics, about 70% of the airport pavements in China have a void rate of more than 30%, and about 30% of the airport pavements have a void rate of more than 60% (serious void). Void can significantly increase the load stress of the pavement, and in adverse conditions, the maximum increase can be nearly 70%, which can significantly reduce the bearing capacity of the pavement structure, shorten the service life of the pavement, and increase the probability of structural diseases (broken board, crack) of the pavement.

[0003] The prior art related to airport road disease, such as patent CN116242833A, airport runway disease detection and early warning system, realizes real-time detection and removal of airport runway disease, and has the functions of discovering, classifying, reporting and warning potential threats to airport runway. At the same time, an efficient airport runway disease detection algorithm is designed to meet the requirements of real-time detection. In-depth study of the formation mechanism of cement concrete pavement void, especially the aggravating effect of water on void disease, has an important guiding role in preventing and repairing void, prolonging the service life of the pavement and ensuring the service performance of the pavement. Model test is an important way to study the formation mechanism of cement concrete pavement void, but there is still a lack of complete test means. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a simulation device for cement concrete pavement void disease, which solves the problem of lack of test model for studying the formation mechanism of cement concrete pavement void in the prior art.

[0005] The utility model is implemented as follows: a simulation device for cement concrete pavement void disease, comprising a road model, a load model, a rainfall model and a monitoring device,

[0006] The load model is placed on the road model and can move circularly on the road model;

[0007] The rainfall model is used to rain on the road model, and the rain contains tracer particles;

[0008] The monitoring device comprises a pressure sensor, a camera, a laser generator and a computer, the pressure sensor is arranged in the road model and is in communication connection with the computer, the camera is arranged in the road model and is used for recording a variation state diagram of the road model and capturing images of the tracer particles, the camera is in communication connection with the computer, and the laser generator is used for irradiating the tracer particles.

[0009] Practice shows that the concrete slab warping caused by temperature change and the slight plastic deformation of the base layer under the action of the aircraft load can cause initial voiding of the slab bottom, then the rain flows into the base layer and the voiding area along the pavement joint, the stagnant water forms a high-speed water flow under the repeated load action and causes scouring of the base layer, the fine aggregate of the base layer is carried out from the joint by the passive water, the pumping and spewing phenomenon is caused, and the voiding area is continuously expanded, and the water damage of the concrete pavement is accelerated; in the utility model, the road model is constructed for simulating the cement concrete pavement, the load model is used for simulating the movement of the aircraft on the pavement, the rainwater of the rainfall model contains the tracer particles captured by the camera after being irradiated by the laser generator, when the load model circulates on the pavement, until the pressure sensor senses that the pressure exceeds the threshold value, initial voiding is determined, the rainfall continuously expands the voiding area, the picture of the tracer particles is acquired by the laser generator and the camera, the image data of the tracer particles is processed and analyzed by the image processing system in the computer, the motion vector information of the tracer particles is obtained, and then the speed and direction of the water flow are acquired, the load model circulates under different speeds and loads, the dynamic water pressure in the voiding gap is calculated according to the water flow speed, the scouring capacity of the water flow on the base material particles under different working conditions can be evaluated, data support is provided for the voiding disease treatment, under the continuous scouring action of the water flow on the voiding area, the voiding area is continuously expanded, until the surface layer in the road model fails, the whole process of the initial voiding to the surface layer failure is monitored by the camera, the formation and development process of the voiding are visualized, and therefore, the simulation device is used, different speeds and loads can be set, the formation and development process of the voiding disease of the concrete pavement under various working conditions can be simulated, and how the load and the water flow scouring affect the formation, evolution and expansion of the voiding disease can be analyzed.

[0010] The further technical scheme of the utility model is that the road model comprises a surface layer and a base layer arranged in sequence, and the pressure sensor is arranged between the surface layer and the base layer.

[0011] The pressure sensor is a thin film pressure sensor, which is fixed to the bottom of the surface layer of the road model and the upper part of the roadbed, and by setting different loads and moving speeds of the test wheel group, the pressure on the surface layer and the roadbed is monitored, and when the void occurs, the pressure change caused by the reduction of the contact surface.

[0012] The further technical scheme of the utility model discloses that the pressure sensor is communicated and connected with the computer through the data acquisition and analysis equipment.

[0013] The further technical scheme of the utility model discloses that the laser generator and the camera are connected with the computer through the synchronizer and are used for synchronous working of the laser generator and the camera.

[0014] The further technical scheme of the utility model discloses that the laser generator is placed outside the road model and the emission end faces the road model.

[0015] The further technical scheme of the utility model discloses that the load model comprises a driving end, a control end and a load equipment arranged between the driving end and the control end, the load equipment comprises a circulating track, a test wheel group arranged on the circulating track, a speed sensor and a pressure applying system, the driving end is used for moving the load equipment on the road model, the control end is communicated and connected with the driving end and the load equipment and is communicated and connected with the computer.

[0016] The further technical scheme of the utility model discloses that the vertical section of the circulating track is annular.

[0017] The vertical section of the circulating track is annular, when the test wheel group moves between the circulating tracks, the circulating track moves circularly between the control end and the driving end, the load model moves unidirectionally, linearly and circularly on the surface of the road model, and the simulated load is closer to the actual situation.

[0018] The further technical scheme of the utility model discloses that the rainfall model comprises a support, a pipeline, a spray head, a water pump and a water storage tank, the support is arranged above the road model, the pipeline is arranged on the support and is connected with the water storage tank through the water pump, and the spray head is arranged on the pipeline.

[0019] The pipeline is fixedly bound on the support, the spray heads are uniformly distributed on the pipeline, the pipeline is connected with the water pump, the water pump is installed on the water storage tank, the water storage tank is provided with a rotary control button, the rotary control button can adjust the water discharge amount and pressure of the spray head, so that different intensity and duration of rainfall are simulated, and cooperating with the monitoring equipment, the erosion effect of the water flow on the simulated roadbed material and how the water flow causes and aggravates the void disease process can be evaluated.

[0020] The further technical scheme of the utility model discloses: the pipeline is equipped with the rotary control button for adjusting the water discharge and pressure of the spray head.

[0021] The utility model discloses still provide a kind of simulation method of cement concrete pavement void disease, comprising the following steps:

[0022] Step one, load model circulates on road model, until the pressure sensor in road model detects that pressure exceeds threshold value, camera monitors and records the initial formation process of void disease;

[0023] Step two, rainwater containing missing particles enters the void area in road model from rainfall model, along with the circulation of load model, monitoring equipment obtains the flow velocity and flow direction of rainwater in void area and calculates dynamic water pressure, pressure sensor monitors the pressure in different regions of road model under different loads, computer judges void range according to difference, camera monitors and records the development process of void disease;

[0024] Step three, surface layer failure in road model is monitored, and the simulation of void disease is completed.

[0025] The utility model discloses a visual simulation device of cement concrete pavement plate void disease formation and development, including road model, load model, rainfall model, monitoring equipment;Road model is composed of multiple transparent surface layers and roadbed, load model includes test wheel group, and its speed and load can be adjusted, and it drives on surface layer in one direction, rainfall model can simulate rainfall of different intensity and duration;Monitoring equipment includes pressure sensor, camera, laser generator and computer, pressure monitoring system can monitor the pressure on surface layer and roadbed, and the pressure change caused by the reduction of contact surface when void occurs, camera, laser generator and computer can obtain the flow velocity and flow direction of water in void space according to the motion vector information of tracer particle, calculate the dynamic water pressure in void space according to water flow velocity, by adjusting the speed and load of test wheel group, how the dynamic water pressure in void space changes with the speed and weight of load model can be analyzed, and then the scouring ability of water flow to roadbed material particles under different working conditions can be evaluated, camera can also monitor and record the initial formation and subsequent development process of void disease.The utility model can set different speed and load according to needs, carry out corresponding simulation test, for simulating the formation and development process of void disease under different working conditions, and the test result can provide basis for preventing concrete pavement void disease, prolonging pavement service life and guaranteeing pavement service performance.The utility model provides a kind of relatively complete means for studying cement concrete pavement void formation mechanism, especially for studying the deterioration mechanism of bottom stagnant water to void disease, and the test result can provide basis for preventing concrete pavement void disease, prolonging pavement service life and guaranteeing pavement service performance. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of a cement concrete pavement void disease simulation device provided by the utility model;

[0027] Figure 2 is a structural schematic view of a load model provided by the utility model;

[0028] Figure 3 is a structural schematic view of a monitoring device provided by the utility model;

[0029] Figure 4 is a structural schematic view of a rainfall model provided by the utility model.

[0030] Reference signs: 1. road model, 11. surface layer, 12. roadbed,

[0031] 2. load model, 21. driving end, 22. control end, 23. load device, 231. test wheel group,

[0032] 3. rainfall model, 31. support, 32. pipeline, 33. spray head, 34. water pump, 35. water storage tank, 36. rotation control button,

[0033] 4. monitoring device, 41. pressure sensor, 42. camera, 43. laser generator, 44. computer, 45. synchronizer, 46. data acquisition and analysis device. DETAILED DESCRIPTION

[0034] The implementation modes of the utility model are described below through specific examples, and other advantages and effects of the utility model can be easily understood by those skilled in the art according to the disclosure of the specification. The utility model can also be implemented or applied through other different specific implementation modes, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model.

[0035] It should be noted that the structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not have technical substantive significance, and any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose of the present application, should still fall within the scope of the disclosed technology. Meanwhile, the terms such as "up", "down", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application, and the change or adjustment of the relative relationship is also considered as the scope of the present application without substantial change of technical content.

[0036] Embodiment one:

[0037] Figures 1-4 A simulation device for cement concrete pavement void disease is shown, which comprises a road model 1, a load model 2, a rainfall model 3 and a monitoring device 4,

[0038] The load model 2 is placed on the road model 1 and can move circularly on the road model 2;

[0039] The rainfall model 3 is used to rain above the road model 1, and the rain contains tracer particles;

[0040] The monitoring device 4 comprises a pressure sensor 41, a camera 42, a laser generator 43 and a computer 44, the pressure sensor 41 is placed in the road model 2 and is in communication connection with the computer 44, the camera 42 is placed in the road model 2 for recording the change state diagram of the road model 2 and capturing the image of the tracer particles, the camera 42 is in communication connection with the computer 44, and the laser generator 43 is used to irradiate the tracer particles.

[0041] Practice shows that the concrete slab warping caused by temperature change and the tiny plastic deformation of the base layer under the action of the aircraft load can cause the initial voiding of the slab bottom, and then the rain flows into the base layer and the voiding area along the pavement joint, the stagnant water forms high-speed water flow under the repeated load action, and the base layer fine aggregate is carried out from the joint by the passive water, the pumping and spewing phenomenon is generated, thereby causing the voiding area to continuously expand, and the water damage of the concrete pavement is accelerated; in the utility model, the road model is used for simulating the cement concrete pavement, the load model is used for simulating the movement of the aircraft on the pavement, the rainwater of the rainfall model contains the tracer particles captured by the camera after being irradiated by the laser generator, when the load model circulates on the pavement, until the pressure sensor senses that the pressure exceeds the threshold value, the initial voiding is determined to occur, the rainfall continuously expands the voiding area, the pictures of the tracer particles are acquired by the laser generator and the camera, after the image data processing and analysis of the tracer particles are carried out by the image processing system in the computer, the motion vector information of the tracer particles is obtained, and then the speed and direction of the water flow are acquired, the load model circulates under different speeds and loads, the dynamic water pressure in the void space is calculated according to the water flow speed, the scouring ability of the water flow to the base material particles under different working conditions can be evaluated, data support is provided for the voiding disease treatment; under the continuous scouring action of the water flow to the voiding area, the voiding area continuously expands, until the surface layer in the road model fails, the camera monitors the whole process from the initial voiding to the surface layer failure, the formation and development process of the voiding can be visualized; in summary, the simulation device is carried out by the utility model, different speeds and loads can be set, thereby the formation and development process of the concrete pavement voiding disease under various working conditions can be simulated, and it is helpful to analyze how the load and the water flow scouring affect the formation, evolution and expansion of the voiding disease. The experimental results can provide important basis for preventing the concrete pavement voiding disease, prolonging the service life of the pavement and guaranteeing the service performance of the pavement.

[0042] In the embodiment, the road model comprises a base layer and a plurality of transparent surface layers arranged on the base layer.

[0043] In the embodiment, the load model circulates on the road model in one direction.

[0044] In the embodiment, the laser generator is placed outside the surface of the road model, and the camera is a high-frequency camera embedded in the bottom of the surface layer of the simulated road model. The laser generator and the high-frequency camera are connected to the computer through the synchronizer, so as to synchronize the emission of laser pulses and the opening of the shutter of the camera, thereby ensuring that the image of the tracer particle is captured at the moment of laser irradiation. The high-frequency camera is wirelessly connected to the computer, and the captured image is transmitted to the computer through the high-frequency camera. The image processing system in the computer is used to process and analyze the tracer particle image data captured by the high-frequency camera, to obtain the motion vector information of the tracer particle, and further obtain the velocity and direction of the water flow. By setting different velocities and loads, and inversely calculating the dynamic water pressure in the void space according to the water flow velocity, the scouring ability of the water flow on the particles of the roadbed material under different working conditions can be evaluated. The dynamic water pressure can be calculated by using Bernoulli equation.

[0045] In the embodiment, a laser sheet is installed at the output port of the laser generator, so as to ensure that the laser beam is converted into a light layer with appropriate thickness and shape, and uniformly irradiates the tracer particles in the water flow in the void area. The tracer particles are polyethylene microspheres uniformly dispersed in the water storage pool in the rainfall model. The polyethylene microspheres have similar density to water and are not easy to settle, and have good following property to water flow. The polyethylene microspheres have good light scattering properties and can be clearly visible when irradiated by laser.

[0046] In the embodiment, the camera is a high-frequency camera embedded in the bottom of the surface layer of the road model, which monitors and records the initial formation and subsequent development process of the void disease. The high-frequency camera is wirelessly connected to the computer.

[0047] In the embodiment, the road model 1 includes a surface layer 11 and a roadbed 12 arranged in an upper and lower manner. The pressure sensor 41 is arranged between the surface layer 11 and the roadbed 12.

[0048] In the embodiment, the pressure sensor is a thin film pressure sensor fixed to the bottom of the surface layer of the road model and the upper part of the roadbed. By setting different loads and moving speeds of the test wheel group, the pressure on the surface layer and the roadbed is monitored, and the pressure change caused by the reduction of the contact surface when the void occurs. The thin film pressure sensor is wirelessly connected to the data acquisition device, and the data acquisition device is connected to the computer.

[0049] In the embodiment, the pressure sensor 41 is communicatively connected to the computer 44 through the data acquisition and analysis device 46.

[0050] In the embodiment, the laser generator 43 and the camera 42 are connected to the computer 44 through the synchronizer 45, so as to synchronize the operation of the laser generator 43 and the camera 42.

[0051] In the embodiment, the laser generator 43 is placed outside the road model 1 and the emission end faces the road model 1.

[0052] In the embodiment, the load model 2 comprises a driving end 21, a control end 22 and a load device 23 placed between the driving end 21 and the control end 22, the load device 23 comprises a circulating track and a test wheel group 231 placed on the circulating track, a speed sensor and a pressure applying system, the driving end 21 is used for moving the load device 23 on the road model 1, the control end 22 is in communication connection with the driving end 21, the load device 23 and a computer 44.

[0053] In the embodiment, the vertical section of the circulating track is ring-shaped.

[0054] In the embodiment, the load model comprises a load frame body placed between the driving end and the control end, the circulating track is installed on the load frame body, the speed sensor is installed on the load frame body for detecting the speed of the test wheel group, the pressure applying system is a hydraulic system, the pressure applying system is used for the test wheel group to apply a controllable vertical load to the ground to simulate the actual traffic load.

[0055] In the embodiment, the driving end comprises a driving motor, a driving control unit and a power supply module, the power supply module can provide stable power to ensure the normal operation of the driving motor, the driving control unit can control the start, stop and speed of the driving motor, etc. to ensure that the test wheel group moves according to the predetermined track.

[0056] In the embodiment, the control end comprises a main controller, a data acquisition module and a communication module, the data acquisition module can collect and store the speed sensor data for real-time monitoring and analysis, the communication module can connect the load model with an external computer to realize remote monitoring and control.

[0057] In the embodiment, the loading area comprises six test wheel groups, the test wheel groups are connected with the driving motor to provide power to move the test wheel groups along the guide rail on the loading area to apply a single-direction load to the road surface of the road model, the guide rail guides and supports the movement of the test wheel groups to ensure their smooth operation along the predetermined path.

[0058] In the embodiment, the test wheel group comprises a hydraulic loading system and a speed sensor, the hydraulic system can make the test wheel apply a controllable vertical load to the ground to simulate the actual traffic load, the speed sensor, the hydraulic loading system and the main controller of the control end are in wireless connection.

[0059] In the embodiment, the rainfall model 3 comprises a bracket 31, a pipe 32, a spray head 33, a water pump 34 and a water storage tank 35, the bracket 31 is arranged above the road model 1, the pipe 32 is arranged on the bracket 31 and connected with the water storage tank 35 through the water pump 34, and the spray head 33 is arranged on the pipe 32.

[0060] In the embodiment, the pipe is fixed on the bracket, the spray head is uniformly distributed on the pipe, the pipe is connected with the water pump, the water pump is installed on the water storage tank, the water storage tank is provided with a rotary control button, the rotary control button can adjust the water flow and pressure of the spray head, so that the rainfall of different intensity and duration is simulated, and cooperating with the monitoring device, the erosion of water flow to the simulated roadbed material and how the water flow causes and aggravates the process of the void disease can be evaluated.

[0061] In the embodiment, the pipe 32 is provided with a rotary control button 36 for adjusting the water flow and pressure of the spray head 33.

[0062] Embodiment two:

[0063] A simulation method of cement concrete pavement void disease, comprising the following steps:

[0064] Step one, the load model 2 moves on the road model 1 in a cycle until the pressure sensor 41 in the road model 1 detects that the pressure exceeds the threshold value, the camera 42 monitors and records the initial formation process of the void disease;

[0065] Step two, the rainwater containing missing particles enters the void area in the road model 1 from the rainfall model 3, and as the load model 2 moves in a cycle, the monitoring device 4 obtains the flow velocity and flow direction of the rainwater in the void area and calculates the dynamic water pressure, the pressure sensor 41 monitors the pressure in different areas of the road model 1 under different loads, and the computer 44 judges the void range according to the difference, and the camera 42 monitors and records the development process of the void disease;

[0066] Step three, the surface layer 11 in the road model 1 is monitored to fail, and the simulation of the void disease is completed.

[0067] In step one, initially, the load model is applied to the road model, the test wheel group driving speed and load pressure of the load model are set, so that the load model moves in a one-way straight line in a cycle. Due to the repeated action of the traffic load, the surface layer of the road model is in the elastic deformation stage, and the deformation caused by the load can be basically completely restored. However, due to the viscoelasticity and plasticity of the base material, the deformation cannot be completely restored. The interlayer pressure change can be monitored through the pressure sensor on the surface layer and the roadbed, and the initial formation process of the void disease can be monitored and recorded by cooperating with the high-frequency camera, which mainly shows as interlayer discontinuity or interlayer peeling at the initial stage.

[0068] In step two, the rain with polyethylene microspheres will infiltrate through the joint of the surface layer and gather in the gap between the surface layer and the subgrade by adjusting the intensity and duration of the rainfall through the rainfall model, the camera, the laser generator and the computer can obtain the motion vector information of the tracer particles, and then obtain the flow velocity and direction of the water in the gap, and calculate the dynamic water pressure in the gap according to the water flow velocity. By adjusting the speed and load of the test wheel group of the load model, how the dynamic water pressure in the gap changes with the vehicle speed and load can be analyzed, and then the scouring ability of the water flow on the particles of the subgrade material under different working conditions can be evaluated, thereby providing a theoretical basis for the research and treatment of the void disease.

[0069] With the scouring of the water on the subgrade material and the repeated action of the traffic load, the particles of the subgrade material are stripped, since the flow velocity of the water at the joint of the surface layer is the fastest, and the area close to the plate edge is more likely to bear the concentrated load, the particles of the subgrade material in these areas are more likely to be stripped, which causes the void disease to mainly develop longitudinally, and the thickness of the gap increases. The pressure sensor can monitor the pressure borne by the surface layer and the subgrade under different loads, and the void range can be judged through the pressure difference between the layers, and the camera can monitor and record the development process of the void disease.

[0070] With the continuous longitudinal expansion of the void disease, only the surface layer can deform and contact the bottom of the gap under the heavy load. If it is a normal ordinary load, the deformation of the surface layer cannot reach the bottom of the gap, which causes the area of the subgrade bearing the concentrated load to move from the plate edge to the inside of the gap, so that the void disease at this stage is mainly transverse expansion, and the area of the gap increases continuously.

[0071] In step three, with the passage of time, the longitudinal expansion and the transverse expansion of the void disease are alternately carried out. When the area and the thickness of the gap become large enough, the load increases, and the surface layer is in a completely tensile state, if the maximum bending tensile stress exceeds the tensile strength, the surface layer will be broken and fail. The simulation of the void disease is completed.

[0072] In the embodiment, the failure of the surface plate can be observed by the camera or manually observed.

[0073] The above merely describes the preferred embodiments of the utility model, and is not used to limit the utility model, any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A simulation device for void disease of cement concrete pavement, characterized by, It includes a road model (1), a load model (2), a rainfall model (3), and monitoring equipment (4). The road model (1) includes a roadbed (12) and multiple surface layers (11) placed on the roadbed (12). The load model (2) is placed on the road model (1) and can move cyclically on the road model (1); The rainfall model (3) is used to generate rainfall above the road model (1), and the rainfall contains tracer particles; The monitoring device (4) includes a pressure sensor (41), a camera (42), a laser generator (43), and a computer (44). The pressure sensor (41) is placed inside the road model (1) and is connected to the computer (44). The camera (42) is placed inside the road model (1) to record the changing state of the road model (1) and capture images of the tracer particles. The camera (42) is connected to the computer (44). The laser generator (43) is used to irradiate the tracer particles.

2. The simulation device for void disease of cement concrete pavement according to claim 1, characterized in that, The surface layer (11) is transparent, and the pressure sensor (41) is placed between the surface layer (11) and the roadbed (12).

3. The simulation device for void disease of cement concrete pavement according to claim 1, characterized in that, The pressure sensor (41) is connected to the computer (44) via the data acquisition and analysis equipment (46).

4. The simulation device for void disease of cement concrete pavement according to claim 1, characterized in that, The laser generator (43) and the camera (42) are connected to the computer (44) via a synchronizer (45) for the laser generator (43) and the camera (42) to work synchronously.

5. The simulation device for void disease of cement concrete pavement according to claim 1, characterized in that, The laser generator (43) is placed outside the road model (1) with its emitting end facing the road model (1).

6. The simulation device for void disease of cement concrete pavement according to claim 1, characterized in that, The load model (2) includes a drive end (21), a control end (22), and a load device (23) placed between the drive end (21) and the control end (22). The load device (23) includes a circular track and a test wheel set (231) placed on the circular track, a speed sensor, and a pressure system. The drive end (21) is used for the load device (23) to move on the road model (1). The control end (22) is connected to the drive end (21), the load device (23), and the computer (44).

7. The simulation device for void disease of cement concrete pavement according to claim 6, characterized in that, The vertical cross-section of the circular track is annular.

8. The simulation device for voids in cement concrete pavement according to claim 1, characterized in that, The rainfall model (3) includes a support (31), a pipe (32), a nozzle (33), a water pump (34), and a water storage tank (35). The support (31) is placed above the road model (1), the pipe (32) is placed on the support (31) and connected to the water storage tank (35) through the water pump (34), and the nozzle (33) is placed on the pipe (32).

9. The simulation device for voids in cement concrete pavement according to claim 8, characterized in that, The pipe (32) is equipped with a rotary control button (36) for adjusting the water output and pressure of the nozzle (33).

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