Simulation structure and simulation manufacturing method for road void disease

Abstract

The invention relates to a road void disease simulation structure and a simulation manufacturing method. A target void area of a middle structure layer is broken, a void filling layer and a control connector are laid in the target void area, and a solvent is introduced into the target void area through the control connector to dissolve the void filling layer, so that void diseases are formed in the target void area and used for simulating the void disease phenomenon of an actual road. The measurement result is more accurate, the void forming time is shorter, and pressure can be applied to void diseases of different degrees by changing the area and void depth of the target void region, so that the road bearing capacity under different void degrees is simulated. By accurately representing the formation of the void disease, the mechanical properties and stability of the road under different degrees of disease conditions can be deeply analyzed, reference is provided for maintenance and repair, maintenance resources and fund allocation are optimized, the maintenance efficiency and quality are improved, the maintenance cost is reduced, and the road traffic safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of road research, and in particular to a simulation structure and a simulation production method for road hollowing damage. Background Art

[0002] Roads are the foundation for safe driving of vehicles. In recent years, due to the leakage of underground pipe networks in urban roads, rainwater erosion, and disturbances caused by surrounding construction, loose materials have appeared inside the roads and gradually evolved into voids. The emergence of voids will cause the roads to sink, deform, and reduce their structural bearing capacity, and then evolve into cavities, and even cause road collapse and other events, becoming a serious threat to the safe driving of vehicles on the roads.

[0003] When a void appears inside a road, it is necessary to determine the impact of the void area on its bearing capacity. The more common research methods include numerical simulation and scaled model tests. It is a common problem that the physical and mechanical parameters are difficult to determine and the initial stress field is difficult to restore. The formation of voids further complicates the problem, resulting in a large difference between the numerical simulation results and the actual state. It is impossible to truly grasp the actual state information of the void and the true impact on the road bearing capacity, making it difficult to accurately guide road maintenance decisions. There is a problem with the dynamic similarity criterion in the scaled model test. At the same time, according to the similarity ratio, when the void is small, the scaled size is even smaller than the size of the buried sensor, resulting in excessive measurement errors.

[0004] Therefore, in the prior art, the simulation method of road void damage has the problem of unreliable simulation results. Summary of the invention

[0005] Based on this, it is necessary to provide a simulation method for road hollowing diseases in order to address the problem of unreliable simulation results in existing simulation methods for road hollowing diseases.

[0006] A method for simulating road hollowing damage, comprising:

[0007] Laying the lower structural layer;

[0008] Laying the middle structural layer;

[0009] crushing the target de-hollowed area of ​​the middle structural layer;

[0010] Laying a hollowing filling layer and a control joint in the target hollowing area of ​​the middle structural layer;

[0011] Laying an upper structural layer on the upper surface of the middle structural layer and the upper surface of the target de-hollowing area;

[0012] The control joint is connected to a water supply pipeline to introduce a solvent into the target de-hollowing area and dissolve the de-hollowing filling layer.

[0013] In one embodiment, after the step of breaking the target hollowed-out area of ​​the middle structural layer, the step further includes: grinding the surface of the target hollowed-out area.

[0014] In one embodiment, after the step of laying the hollowing filling layer and the control joint in the target hollowing area of ​​the middle structure layer, the method further includes:

[0015] An interface isolation layer is laid on the upper surface of the dehollowing filling layer.

[0016] In one embodiment, the step of laying the upper structure layer on the upper surface of the middle structure layer and the upper surface of the target hollowing area includes: laying the upper structure layer in a direction from shallow to deep according to the hollowing depth of the target hollowing area;

[0017] Acceleration sensors are laid in the upper structural layer.

[0018] A simulation structure for road hollowing disease is manufactured based on the simulation manufacturing method as described above; the simulation structure for road hollowing disease comprises:

[0019] Lower structural layer;

[0020] A middle structural layer is laid on the upper surface of the lower structural layer; the middle structural layer has a target hollowing area, and a hollowing filling layer is laid on the upper surface of the target hollowing area;

[0021] A control joint is laid in the hollow filling layer; the control joint can be connected to a water supply pipeline to introduce a solvent into the hollow filling layer, and the hollow filling layer can be dissolved in the solvent;

[0022] The upper structural layer is laid on the upper surface of the middle structural layer.

[0023] In one of the embodiments, the middle structural layer includes a plurality of base plates; the target de-hollowing area includes a first area, and the first area is located in the middle position of one of the base plates.

[0024] In one embodiment, the target hollowing area includes a second area spaced apart from the first area, and the second area is located at an edge of another of the base plates.

[0025] In one of the embodiments, an interface isolation layer is laid between the upper surface of the dehollow filling layer and the lower surface of the upper structural layer.

[0026] In one embodiment, the paving material of the hollow filling layer includes carbon amide; and / or,

[0027] The paving material of the interface isolation layer includes a plastic film; and / or,

[0028] The paving material of the upper structural layer includes concrete; and / or,

[0029] An acceleration sensor is embedded in the upper structural layer.

[0030] In one of the embodiments, a plurality of water outlets are arranged on the control joint.

[0031] The above-mentioned simulation method of road hollowing disease is to break the target hollowing area of ​​the middle structure layer, lay a hollowing filling layer and a control joint in the target hollowing area, and then connect the water supply pipe through the control joint to introduce the solvent into the target hollowing area to dissolve the hollowing filling layer, so as to form a hollowing disease in the target hollowing area, which is used to simulate the hollowing disease phenomenon of the actual road, and the measurement result is more accurate, and the hollowing forming time is faster. By changing the area and the hollowing depth of the target hollowing area, pressure can be applied to hollowing diseases of different degrees, so as to simulate the road bearing capacity under different hollowing degrees, which can be used to evaluate the actual bearing capacity of urban roads of various levels after hollowing, and improve the road bearing capacity evaluation system. By accurately reproducing the formation of hollowing diseases, it is possible to deeply analyze the mechanical properties and stability of roads under different degrees of disease conditions, provide reference for maintenance and repair, optimize maintenance resources and fund allocation, improve maintenance efficiency and quality, reduce maintenance costs, improve road traffic safety, and extend road life. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a method for simulating road hollowing damage provided in one embodiment of the present application.

[0033] Figure 2 A schematic diagram of a simulation structure of a road void disease provided in one embodiment of the present application.

[0034] Figure 3 for Figure 2 A partial top view of the simulated structure of the road void disease is shown.

[0035] Figure 4 A schematic diagram of a simulation structure of a road void disease provided in another embodiment of the present application.

[0036] Figure 5 for Figure 4 A partial exploded view of the simulated structure of the road void disease is shown.

[0037] Figure numbers: 110, lower structural layer; 120, middle structural layer; 121, target de-hollowing area; 1211, first area; 1212, second area; 122, de-hollowing filling layer; 123, control joint; 124, interface isolation layer; 130, upper structural layer. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0044] Roads are the foundation for safe driving of vehicles. In recent years, due to the leakage of underground pipe networks in urban roads, rainwater erosion, and disturbances caused by surrounding construction, loose materials have appeared inside the roads and gradually evolved into voids. The emergence of voids will cause the roads to sink, deform, and reduce their structural bearing capacity, and then evolve into cavities, and even cause road collapse and other events, becoming a serious threat to the safe driving of vehicles on the roads.

[0045] After a void appears inside the road, it is necessary to determine the impact of the void area on its bearing capacity. The more common research methods include numerical simulation and scaled model tests. It is a common problem that the physical and mechanical parameters are difficult to determine and the initial stress field is difficult to truly restore in numerical simulation methods. The formation of voids further increases the complexity of the problem, resulting in a large difference between the numerical simulation results and the actual state. It is impossible to truly grasp the actual state information of the void and the true impact on the road's bearing capacity, making it difficult to accurately guide road maintenance decisions. There is a problem of dynamic similarity criterion in scaled model tests. At the same time, according to the similarity ratio, when the void is small, the scaled size is even smaller than the size of the buried sensor, resulting in excessive measurement errors. In related technologies, the simulation method of road void damage has the problem of unreliable simulation results.

[0046] Based on this, an embodiment of the present application provides a method for simulating the production of road hollowing diseases. By accurately reproducing the formation of hollowing diseases, it is possible to deeply analyze the mechanical properties and stability of roads under different degrees of disease conditions, provide references for maintenance and repair, optimize maintenance resources and fund allocation, improve maintenance efficiency and quality, reduce maintenance costs, improve road traffic safety, and extend road life. The following will be combined with the accompanying drawings to introduce in detail the method for simulating the production of road hollowing diseases provided by an embodiment of the present application.

[0047] See also Figure 1 , a method for simulating road hollowing damage provided by an embodiment of the present application includes:

[0048] Step S100 , laying the lower structural layer 110 .

[0049] Specifically, the lower structural layer 110 is the roadbed, which is the basic part of the road, located at the bottom layer, and bears the load of the entire pavement structure. The materials used for the roadbed generally include natural soil, gravel and crushed stone, sand and industrial waste. For natural soil, the natural soil at the construction site can be used directly, which is suitable for areas with good soil conditions; the natural soil can also be improved by adding lime, cement, fly ash and other materials to improve its strength and stability. Gravel can be selected from naturally formed gravel, so that the roadbed has higher strength and stability. Sand can be selected from naturally formed sand, which is suitable for roadbeds that require good drainage performance; artificial sand can also be selected, and the sand obtained by screening and mixing has a uniform particle size, which is suitable for roadbeds that require good drainage performance. Industrial waste can be selected from slag from steel mills, which has good stability and durability; or fly ash from coal-fired power plants, which has good stability and drainage performance.

[0050] Step S200: laying the middle structure layer 120.

[0051] After the lower structure layer 110 is laid and formed, the middle structure layer 120 is laid. The middle structure layer 120 is specifically a base layer, which is located on the roadbed. The main function of the base layer is to provide sufficient strength and stability to withstand vehicle loads. The base layer can be made of cement stabilized materials, which are mixed with crushed stone (or gravel) and compacted and cured to form a stable base material with high strength and stability. The base layer can also be made of lime stabilized materials, which are mixed with lime and natural soil (or gravel) and compacted and cured to form a stable base material; or asphalt is mixed with crushed stone, which is compacted and cured to form a stable base material; a mixed material of cement, lime and natural soil can also be used.

[0052] Step S300 , breaking the target hollow area 121 of the middle structure layer 120 .

[0053] The position and size of the target clearance area 121 can be determined according to the test requirements. Figure 3 As shown, in one embodiment, the middle structure layer 120 includes a plurality of base plates, and the target hollowing area 121 includes a first area 1211, and the first area 1211 is located in the middle position of one of the base plates, that is, the hollowing disease is hollowing in the plate. The starting position of the hollowing in the plate is a certain distance from the edge of the base plate, the hollowing area extends symmetrically from the middle to both sides, and the hollowing depth gradually increases from the outside to the inside, that is, the first area 1211 is approximately a pyramid structure. Further, the target hollowing area 121 also includes a second area 1212 separated from the first area 1211, and the second area 1212 is located at the edge of another base plate, that is, the hollowing disease is hollowing at the edge of the plate. The starting position of the hollowing at the edge of the plate starts from the edge of the base plate, the hollowing length is set according to actual needs, and the hollowing depth gradually decreases from the outside to the middle to 0m. Specifically, after marking the hollowing position, an impact drill can be used to crush the target hollowing area 121 to be hollowed.

[0054] In one embodiment, after step S300, the following further includes: step S310, grinding the surface of the target hollowing area 121. Specifically, a grinder can be used to grind the surface of the target hollowing area 121, that is, the hollowing surface, so that the uneven hollowing surface after crushing becomes a flat surface, improves the flatness, facilitates the subsequent laying of the hollowing filling layer 122, and ensures the hollowing accuracy.

[0055] Step S400 , laying a hollowing filling layer 122 and a control joint 123 in the target hollowing area 121 of the middle structure layer 120 .

[0056] Specifically, taking the target de-hollowing area 121 including the aforementioned first area 1211 and second area 1212 as an example, de-hollowing filling layers 122 are laid in the first area 1211 and the second area 1212 respectively, and in the process of laying the de-hollowing filling layer 122, the control joint 123 is buried, that is, after laying a part of the thickness of the de-hollowing filling layer 122, the control joint 123 is laid, and then the remaining thickness of the de-hollowing filling layer 122 is laid. The control joint 123 reserves a certain length and interface on the outside, which is convenient for the later control of the de-hollowing evolution behavior, such as controlling the water injection flow rate. The de-hollowing filling layer 122 can be specifically a granular carbonamide, which has high strength and hardness, can withstand the heavy pressure of the top layer of concrete, and is chemically inert, and will not have any chemical reaction with the top layer of concrete and the base layer, thereby ensuring the accuracy and reliability of the de-hollowing simulation. The material of the control joint 123 can be a shower hose, which has a stainless steel braided layer on the outside and a plastic or rubber tube on the inside, and has strong pressure resistance and flexibility.

[0057] In one embodiment, after step S400, the method further includes: step S410, laying an interface isolation layer 124 on the upper surface of the hollow filling layer 122, the interface isolation layer 124 is used to isolate the hollow filling layer 122 from the upper structural layer 130 (concrete layer) on the space, to prevent the upper structural layer 130 from being affected in the process of forming the hollow space later. The interface isolation layer 124 can be made of plastic film, including polyethylene film, polypropylene film, polyester film, polyvinyl chloride film, polyamide film or polyvinylidene chloride film, etc., which has good barrier properties, can prevent water or gas penetration, and has chemical resistance (acid and alkali corrosion resistance).

[0058] Step S500 , laying an upper structural layer 130 on the upper surface of the middle structural layer 120 and the upper surface of the target de-hollowing area 121 .

[0059] Specifically, the upper structural layer 130 includes concrete, which is a mixture of cement, aggregate (sand and crushed stone), water and possible additives, and has good mechanical properties, durability and economy. Cement, as a cementitious material, reacts with water to generate hydration products to bond aggregates together. Cement can be selected from ordinary Portland cement (OPC), early strength cement, low heat cement, sulphoaluminate cement, etc. Aggregates are selected from sand with a smaller particle size (less than 5 mm), or crushed stone or pebbles with a particle size greater than 5 mm, which are used to provide structural support, reduce cement usage, and reduce costs. Admixtures can be water reducers for reducing water consumption, retarders for delaying the setting time of concrete, early strength agents for accelerating the early strength development of concrete, antifreeze agents for preventing concrete from freezing damage, or expansion agents for reducing concrete shrinkage, etc., which can be selected according to actual needs.

[0060] When pouring the concrete layer on the hollow area, the principle of from shallow to deep is followed. Taking the first area 1211 (i.e., the hollow in the board) as an example, the concrete is poured from the outer layer to the center; taking the second area 1212 (the hollow at the edge of the board) as an example, the concrete is poured from the center to the outer layer. If the concrete layer is first laid on the hollow surface with a deeper hollow depth, the filling material particles here may be squeezed to both sides, affecting the flatness of the hollow surface and the concrete layer. Therefore, the method of from shallow to deep is adopted to ensure the uniformity of laying the hollow filling material.

[0061] Furthermore, in one embodiment, during the process of laying the upper structure layer 130, an acceleration sensor is also buried in the upper structure layer 130. When a vehicle passes through the debonded road, the upper structure layer 130 will generate road vibration. The vibration magnitude can be collected by the acceleration sensor. By detecting the vibration of the road, the structural health of the road can be evaluated, thereby establishing a vibration database to evaluate the degree of road damage. In addition, the critical threshold of the collapse of the debonded road can also be collected by the acceleration sensor. When the acceleration sensor is applied to the road, it is evaluated whether the road needs timely maintenance based on the collected vibration database and critical threshold. The acceleration sensor can be specifically a piezoelectric acceleration sensor. The piezoelectric effect is used. When the sensor is subjected to acceleration, the internal piezoelectric material generates an electric charge; the acceleration sensor can also be a piezoresistive acceleration sensor. The piezoresistive effect is used. When the sensor is subjected to acceleration, the internal resistance will change; or the acceleration sensor is a capacitive acceleration sensor. The capacitance effect is used. When the sensor is subjected to acceleration, the internal capacitance will change.

[0062] Step S600 , controlling the joint 123 to be connected to a water supply pipe to introduce a solvent into the target de-hollowing area 121 and dissolve the de-hollowing filling layer 122 .

[0063] Specifically, after the top concrete layer hardens, the control joint 123 is connected to the external water supply pipe, so that a solvent such as water is introduced into the hollow filling material, so that the hollow filling material is dissolved by water, thereby forming a hollow space in the hollow area, simulating the actual hollow disease. Among them, the control joint 123 is specifically a control pipe, and the control pipe is provided with a plurality of water outlets arranged at intervals along its axial and circumferential directions, so that the water introduced into the hollow filling layer 122 is distributed more evenly, thereby improving its dissolution efficiency. Furthermore, a flow regulating valve is provided on the control pipe, so that the water flow can be adjusted according to the volume of the hollow area. The flow regulating valve can specifically be a ball valve or a butterfly valve, etc. The ball valve can change the cross-sectional area of ​​the fluid channel by rotating the ball, thereby adjusting the flow; the butterfly valve can change the cross-sectional area of ​​the fluid channel by rotating the butterfly plate, thereby adjusting the flow.

[0064] The above-mentioned simulation method for producing road hollowing disease is to crush the target hollowing area 121 of the middle structural layer 120, and lay a hollowing filling layer 122 and a control joint 123 in the target hollowing area 121, and then connect the water supply pipe through the control joint 123, so as to introduce the solvent into the target hollowing area 121 to dissolve the hollowing filling layer 122, thereby forming a hollowing disease in the target hollowing area 121, which is used to simulate the hollowing disease phenomenon of the actual road, and the measurement result is more accurate, and the hollowing forming time is faster. By changing the area and hollowing depth of the target hollowing area 121, pressure can be applied to hollowing diseases of different degrees, thereby simulating the road bearing capacity under different hollowing degrees, which can be used to evaluate the actual bearing capacity of urban roads of various levels after hollowing, and improve the road bearing capacity evaluation system. By accurately reproducing the formation of void damage, we can deeply analyze the mechanical properties and stability of roads under different degrees of damage conditions, provide reference for maintenance and repair, optimize maintenance resources and fund allocation, improve maintenance efficiency and quality, reduce maintenance costs, improve road traffic safety, and extend road life.

[0065] Furthermore, if Figures 2 to 5 As shown, an embodiment of the present application also provides a simulation structure of road hollowing damage, which is manufactured based on the simulation manufacturing method as described above; the simulation structure of road hollowing damage includes a lower structure layer 110, a middle structure layer 120, a control joint 123 and an upper structure layer 130; the middle structure layer 120 is laid on the upper surface of the lower structure layer 110; the middle structure layer 120 has a target hollowing area 121, and the upper surface of the target hollowing area 121 is laid with a hollowing filling layer 122; the control joint 123 is laid in the hollowing filling layer 122; the control joint 123 can be connected to a water supply pipe to introduce a solvent into the hollowing filling layer 122, and the hollowing filling layer 122 can be dissolved in the solvent; the upper structure layer 130 is laid on the upper surface of the middle structure layer 120.

[0066] By crushing the target hollow area 121 of the middle structure layer 120, laying the hollow filling layer 122 and the control joint 123 in the target hollow area 121, and then connecting the water supply pipe through the control joint 123, the solvent is introduced into the target hollow area 121 to dissolve the hollow filling layer 122, so as to form a hollow disease in the target hollow area 121, which is used to simulate the hollow disease phenomenon of the actual road, the measurement result is more accurate, and the hollow forming time is faster. By changing the area and the hollow depth of the target hollow area 121, pressure can be applied to hollow diseases of different degrees, so as to simulate the road bearing capacity under different hollow degrees, which can be used to evaluate the actual bearing capacity of urban roads of various levels after hollowing, and improve the road bearing capacity evaluation system. By accurately reproducing the formation of hollow diseases, the mechanical properties and stability of roads under different degrees of disease conditions can be deeply analyzed, providing reference for maintenance and repair, optimizing maintenance resources and fund allocation, improving maintenance efficiency and quality, reducing maintenance costs, improving road traffic safety, and extending road life.

[0067] In one embodiment, an acceleration sensor is embedded in the upper structure layer 130. When a vehicle passes through the debonded road, the upper structure layer 130 will generate road vibration. The vibration magnitude can be collected by the acceleration sensor. By detecting the vibration of the road, the structural health of the road can be evaluated, thereby establishing a vibration database to evaluate the degree of road damage. In addition, the critical threshold of the collapse of the debonded road can also be collected by the acceleration sensor. When the acceleration sensor is applied to the road, the collected vibration database and critical threshold are used to evaluate whether the road needs timely maintenance. Among them, the paving material of the upper structure layer 130 includes concrete.

[0068] like Figures 2 to 5 As shown, in one embodiment, the middle structure layer 120 includes a plurality of base plates; the target hollowing area 121 includes a first area 1211, and the first area 1211 is located in the middle of one of the base plates, that is, the hollowing defect is hollowing in the plate. The starting position of the hollowing in the plate is a certain distance away from the edge of the base plate, the hollowing area expands symmetrically from the middle to both sides, and the hollowing depth gradually increases from the outside to the inside, that is, the first area 1211 is approximately a pyramid structure.

[0069] like Figures 2 to 5As shown, in one embodiment, the target hollowing area 121 includes a second area 1212 separated from the first area 1211, and the second area 1212 is located at the edge of another base plate, that is, the hollowing disease is a hollowing of the plate edge. The starting position of the plate edge hollowing starts from the edge of the base plate, the hollowing length is set according to actual needs, and the hollowing depth gradually decreases from the outside to the middle to 0m. Specifically, after the hollowing position is marked, the target hollowing area 121 to be hollowed out can be crushed with an impact drill.

[0070] like Figures 2 to 5 As shown, in one embodiment, the paving material of the void filling layer 122 includes granular carbonamide, which has high strength and hardness, can withstand the weight of the top layer of concrete, and is chemically inert and will not undergo any chemical reaction with the top layer of concrete and the base layer, thereby ensuring the accuracy and reliability of the void simulation.

[0071] like Figures 2 to 5 As shown, in one embodiment, an interface isolation layer 124 is laid between the upper surface of the hollow filling layer 122 and the lower surface of the upper structural layer 130. The interface isolation layer 124 is used to isolate the hollow filling layer 122 from the upper structural layer 130 (concrete layer) in space to prevent the upper structural layer 130 from being affected during the subsequent formation of the hollow space. The interface isolation layer 124 can be made of a plastic film, including a polyethylene film, a polypropylene film, a polyester film, a polyvinyl chloride film, a polyamide film, or a polyvinylidene chloride film, etc., which has good barrier properties, can prevent moisture or gas penetration, and is also chemically resistant (acid and alkali corrosion resistant).

[0072] In one embodiment, a plurality of water outlets are arranged on the control joint 123. The plurality of water outlets are arranged at intervals along the axial and circumferential directions of the control joint 123, so that the water introduced into the de-hollowed filling layer 122 is distributed more evenly, thereby improving its dissolution efficiency. Furthermore, a flow regulating valve is provided on the control pipeline, so that the water flow rate can be adjusted according to the volume of the de-hollowed area. The flow regulating valve can be a ball valve or a butterfly valve, etc. The ball valve can change the cross-sectional area of ​​the fluid channel by rotating the ball, thereby adjusting the flow rate; the butterfly valve can change the cross-sectional area of ​​the fluid channel by rotating the butterfly plate, thereby adjusting the flow rate.

[0073] By crushing the target hollow area 121 of the middle structure layer 120, laying the hollow filling layer 122 and the control joint 123 in the target hollow area 121, and then connecting the water supply pipe through the control joint 123, the solvent is introduced into the target hollow area 121 to dissolve the hollow filling layer 122, so as to form a hollow disease in the target hollow area 121, which is used to simulate the hollow disease phenomenon of the actual road, the measurement result is more accurate, and the hollow forming time is faster. By changing the area and hollow depth of the target hollow area 121, pressure can be applied to hollow diseases of different degrees, so as to simulate the road bearing capacity under different hollow degrees, which can be used to evaluate the actual bearing capacity of urban roads of various levels after hollowing. By burying an acceleration sensor in the upper structure layer 130, when a vehicle passes through the hollow road, the upper structure layer 130 will generate road vibration, and the vibration size can be collected by the acceleration sensor. By detecting the vibration of the road, the structural health of the road can be evaluated, so as to establish a vibration database to evaluate the degree of road damage. By accurately reproducing the formation of void damage, we can deeply analyze the mechanical properties and stability of roads under different degrees of damage conditions, provide reference for maintenance and repair, optimize maintenance resources and fund allocation, improve maintenance efficiency and quality, reduce maintenance costs, improve road traffic safety, and extend road life.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for simulating road hollowing damage, characterized in that: include: Laying a lower structural layer (110); Laying a middle structural layer (120); crushing the target hollowing-out area (121) of the middle structural layer (120); Laying a hollowing filling layer (122) and a control joint (123) in the target hollowing area (121) of the middle structural layer (120); Laying an upper structural layer (130) on the upper surface of the middle structural layer (120) and the upper surface of the target de-hollowing area (121); The control joint (123) is connected to a water supply pipeline to introduce a solvent into the target de-hollowing area (121) and dissolve the de-hollowing filling layer (122).

2. The method for simulating road hollowing damage according to claim 1, characterized in that: After the step of breaking the target hollow area (121) of the middle structural layer (120), the step further includes: grinding the surface of the target hollow area (121).

3. The method for simulating road hollowing damage according to claim 1, characterized in that: After the step of laying a hollowing filling layer (122) and a control joint (123) in the target hollowing area (121) of the middle structure layer (120), the method further includes: An interface isolation layer (124) is laid on the upper surface of the hollow filling layer (122).

4. The method for simulating road hollowing damage according to claim 1, characterized in that: The step of laying an upper structural layer (130) on the upper surface of the middle structural layer (120) and the upper surface of the target hollowing area (121) comprises: laying the upper structural layer (130) in a direction from shallow to deep according to the hollowing depth of the target hollowing area (121); An acceleration sensor is embedded in the upper structural layer (130).

5. A simulation structure for road hollowing damage, characterized in that: The simulation structure of the road hollowing disease is made based on the simulation method according to any one of claims 1 to 4; the simulation structure of the road hollowing disease includes: A lower structural layer (110); A middle structural layer (120) is laid on the upper surface of the lower structural layer (110); the middle structural layer (120) has a target hollowing area (121), and a hollowing filling layer (122) is laid on the upper surface of the target hollowing area (121); A control joint (123) is laid in the hollow filling layer (122); the control joint (123) can be connected to a water supply pipeline to introduce a solvent into the hollow filling layer (122), and the hollow filling layer (122) can be dissolved in the solvent; The upper structural layer (130) is laid on the upper surface of the middle structural layer (120).

6. The simulation structure for road hollowing damage according to claim 5 is characterized in that: The middle structural layer (120) includes a plurality of base plates; the target hollowing area (121) includes a first area (1211), and the first area (1211) is located in the middle position of one of the base plates.

7. The simulation structure for road hollowing damage according to claim 6 is characterized in that: The target hollowing area (121) includes a second area (1212) spaced apart from the first area (1211), and the second area (1212) is located at an edge position of another of the base plates.

8. The simulation structure for road hollowing damage according to claim 5 is characterized in that: An interface isolation layer (124) is laid between the upper surface of the hollow filling layer (122) and the lower surface of the upper structural layer (130).

9. The simulation structure for road hollowing damage according to claim 8, characterized in that: The laying material of the hollow filling layer (122) includes carbon amide; and / or, The paving material of the interface isolation layer (124) includes a plastic film; and / or, The paving material of the upper structural layer (130) includes concrete.

10. The simulation structure for road hollowing damage according to claim 5, characterized in that: The control joint (123) is provided with a plurality of water outlets.

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