A road pavement collapse simulation test device

Abstract

The utility model discloses a road pavement collapse simulation test device including support frame, experiment box, longitudinal pressurization unit, lateral wheel simulation pressurization unit, a plurality of sensor array grid, the experiment box top is provided with the opening, longitudinal pressurization unit includes pressurization oil cylinder, pressurization sole, and pressurization board is located experiment box top opening upper portion, lateral wheel simulation pressurization unit includes push oil cylinder, tire simulation subassembly, sensor array grid includes flexible grid, and a plurality of force sensors are arranged on the flexible grid, the utility model provides integrated longitudinal pressurization unit, lateral wheel simulation pressurization unit and water flow scouring unit, can realize the collapse simulation under the coupling of multiple factors, can improve the arrangement accuracy through the modularization of sensor array in the simplification sensor installation process, is suitable for the research of roadbed deformation collapse mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of road engineering testing equipment, specifically a road surface collapse simulation testing device. Background Technology

[0002] Road subsidence is a common geological hazard. Without prevention or early warning, it can lead to major safety accidents. To study the subsidence mechanism and preventative measures, it is necessary to simulate the road subsidence process under real-world conditions. Currently, there are no widely used products in this field. Many universities and research institutions have developed simulation devices, but these generally suffer from problems such as complex structures and low simulation accuracy. For example, some simulation devices can only apply static or unidirectional pressure, failing to simulate complex real-world environments; others have complex sensor arrangements and require manual setup, which can easily lead to monitoring errors. Summary of the Invention

[0003] The purpose of this invention is to provide a road surface collapse simulation test device to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a road surface collapse simulation test device comprising a support frame, an experimental chamber, a longitudinal pressurization unit, and a transverse wheel simulation pressurization unit. The experimental chamber is mounted on the support frame and has an opening on its top surface. The longitudinal pressurization unit includes a pressurization cylinder and a pressurization base plate. The pressurization cylinder is vertically fixed to the top of the support frame, and its telescopic rod is connected to the pressurization plate via a flange. The pressurization plate is located above the opening on the top surface of the experimental chamber. The transverse wheel simulation pressurization unit includes a push cylinder and a tire simulation assembly. The frame is movably connected to the telescopic rod of the push cylinder.

[0005] Preferably, one side wall of the experimental chamber is a PVC transparent panel, and several connecting pipes are provided on its side wall. A vibration motor is provided at the bottom of the experimental chamber.

[0006] Preferably, the simulation test device further includes a plurality of sensor array grids, the sensor array grids including flexible grids and a plurality of force sensors disposed on the flexible grids, the flexible grids being thin surface materials with arrayed openings on the surface, and the sensors being disposed on the flexible grids.

[0007] Preferably, the longitudinal pressurizing unit further includes a replaceable pressurizing head, which is detachably fixed to the pressurizing base plate by bolts.

[0008] Preferably, the longitudinal pressurizing unit further includes several guide rods, the upper and lower ends of which are fixed on the support frame and pass through guide holes on both sides of the pressurizing base plate.

[0009] Preferably, the tire simulation assembly includes a frame, an upper bearing wheel assembly, and a lower pressure wheel assembly. The frame is a rectangular frame with openings at the top and bottom, enclosed by steel plates. The upper bearing wheel assembly and the lower pressure wheel assembly include several rotating shafts. The two ends of the rotating shafts are rotatably connected to the frame via bearings. The multiple rotating shafts of the upper bearing wheel assembly and the lower pressure wheel assembly are evenly distributed in the upper and lower parts of the frame. Multiple simulated wheel segments are arrayed along the length of the rotating shafts. The diameter of the simulated wheel segments is larger than other areas of the rotating shafts. The top of the simulated wheel segments of the upper bearing wheel assembly and the bottom of the simulated wheel segments of the lower pressure wheel assembly protrude from the top and bottom surfaces of the frame.

[0010] Preferably, a connecting flange seat is fixedly provided on the frame. The connecting flange seat includes a base and a connecting pipe. A square hole is provided on the connecting pipe. The end of the telescopic rod of the push cylinder is provided with a square hole, and the top of the rod is inserted into the connecting pipe. A square connecting pin is inserted into the square hole at the end of the connecting pipe and the telescopic rod. The diameter of the end of the telescopic rod is smaller than the inner diameter of the connecting pipe.

[0011] Preferably, in the direction of pushing the extension and retraction of the hydraulic cylinder, the difference between the length of the square hole at the end of the extension rod of the hydraulic cylinder and the size of the square connecting pin is greater than that in the other direction.

[0012] This invention provides a road surface collapse simulation test device, integrating a longitudinal pressurization unit, a transverse wheel simulation pressurization unit, and a water scouring unit. It can simulate collapse under the coupled effects of multiple factors. The modular sensor array simplifies sensor placement while improving accuracy, making it suitable for studying the mechanism of roadbed deformation and collapse. Specifically, structurally, a longitudinal pressurization cylinder drives a pressure plate for longitudinal pressurization. Different pressure types can be achieved by changing the shape of the pressure plate. In conjunction with the longitudinal cylinder, a transverse drag cylinder simulates wheel pressure, allowing for convenient adjustment of wheel pressure and vehicle speed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0014] Figure 2 This is an enlarged schematic diagram of the experimental chamber area of ​​this utility model.

[0015] Figure 3 This is an enlarged schematic diagram of the transverse wheel simulation pressurization unit area of ​​this utility model.

[0016] Figure 4 This is a schematic diagram of the experimental box and sensor array grid of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] As attached Figure 1-4 As shown, the road surface collapse simulation test device involved in this utility model includes a support frame 1, an experimental box 2, a longitudinal pressurization unit 3, a transverse wheel simulation pressurization unit 4, and a grid of several sensor arrays 5.

[0019] As attached Figure 1 , 2 As shown in Figure 4, the supporting frame 1 is a metal welded frame. The experimental chamber 2 is mounted on the supporting frame, with an opening on the top surface. One side wall is made of high-strength PVC transparent panel 21 for easy observation of internal deformation, while the other sides are made of steel. Several connecting pipes 22 are provided on its side wall for installing water pipes to simulate water erosion. A vibration motor 23 is installed at the bottom of the experimental chamber 2 for compaction during the laying of the base layer.

[0020] As attached Figure 4 As shown, the sensor array grid 5 includes a flexible grid 51 and several force sensors 52 disposed on the flexible grid 51. The flexible grid 51 is a thin surface material made of silicone with an array of openings on its surface. The sensors are disposed on the flexible grid 51. In use, the sensor array grid 5 can be directly placed on a certain base layer, such as a soil layer or a fine sand layer, which can easily realize the regular and quick arrangement of multiple sensors.

[0021] As attached Figure 1 , 2 As shown, the longitudinal pressurization unit 3 includes a pressurization cylinder 31 and a pressurization base plate 32. The pressurization cylinder 31 is vertically fixed to the top of the support frame, and its telescopic rod is connected to the pressurization plate through a flange; the pressurization plate is located above the opening on the top surface of the experimental chamber 2.

[0022] Furthermore, the longitudinal pressurization unit 3 also includes a replaceable pressurization head 33, which is detachably fixed to the pressurization base plate 32 by bolts. Different forms of longitudinal pressurization can be simulated as needed.

[0023] Furthermore, to ensure the directional accuracy of longitudinal pressurization, several guide rods 34 are also provided. The attached figure shows four guide rods. The upper and lower ends of the guide rods 34 are fixed to the support frame and pass through the guide holes on both sides of the pressurization base plate 32 to ensure that the verticality error of the pressurization direction is within the preset range.

[0024] As attached Figure 1 , 3 As shown, the transverse wheel simulation pressurization unit 4 includes a push cylinder 41 and a tire simulation assembly 42. The tire simulation assembly 42 includes a frame 421, an upper pressure-bearing wheel assembly 422, and a lower pressure-bearing wheel assembly 423. The frame 421 is a rectangular frame with openings at the top and bottom, obtained by welding steel plates. The upper pressure-bearing wheel assembly 422 and the lower pressure-bearing wheel assembly 423 include several rotating shafts l1. The two ends of the rotating shafts l1 are rotatably connected to the frame 421 through bearings. The multiple rotating shafts l1 of the upper pressure-bearing wheel assembly 422 and the lower pressure-bearing wheel assembly 423 are evenly distributed on the upper and lower parts of the frame 421. Multiple simulated wheel segments l2 are arrayed along the length of the rotating shafts l1. The diameter of the simulated wheel segments l2 is larger than other areas of the rotating shafts l1. The top of the simulated wheel segments l2 of the upper pressure-bearing wheel assembly 422 and the bottom of the simulated wheel segments l2 of the lower pressure-bearing wheel assembly 423 protrude from the top and bottom surfaces of the frame 421.

[0025] The frame 421 can be movably connected to the telescopic rod of the hydraulic cylinder 41, specifically, it can be movably connected up and down.

[0026] Specifically, a connecting flange seat is fixedly installed on the frame 421. The connecting flange seat includes a base z1 and a connecting pipe z2. A square hole is provided on the connecting pipe z2. The end of the telescopic rod of the push cylinder 41 is provided with a square hole, and its top is inserted into the connecting pipe z2. A square connecting pin z3 is inserted into the square hole at the end of the connecting pipe z2 and the telescopic rod. The diameter of the end of the telescopic rod is smaller than the inner diameter of the connecting pipe z2, thereby enabling the frame 421 and the telescopic rod of the push cylinder 41 to be connected vertically.

[0027] Furthermore, in the direction of extension and retraction of the hydraulic cylinder 41, the length difference between the square hole at the end of the extension rod of the hydraulic cylinder and the square connecting pin z3 is greater than in the other direction, thereby allowing the frame 421 to swing up and down within a certain range.

[0028] In use, the experimental chamber is first filled with target road base materials (such as soil, sand, graded crushed stone), road layers (concrete slabs or steel plates), etc., and sensor array grid 5 is arranged as needed. During the laying process, vibration motor 23 is used to compact each layer. The water pump system is connected through connecting pipe 22 to simulate groundwater erosion or rainwater seepage. Then, longitudinal pressurization is carried out according to the experimental design. When simulating a vehicle, the tire simulation component 42 is pushed to the upper part of the experimental chamber by the push cylinder 41. Then, the longitudinal pressurization unit 3 pressurizes the wheel assembly 422 upward according to the experimental design. Then, the tire simulation component 42 is pushed and pulled back and forth by the push cylinder 41 to realize the vehicle simulation. The pressure change is obtained through sensor array grid 5, and the internal deformation, such as crack development or settlement, is observed through PVC transparent plate 21.

[0029] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A road surface collapse simulation test device, characterized in that, The device includes a support frame, an experimental chamber, a longitudinal pressurization unit, and a transverse wheel simulation pressurization unit. The experimental chamber is mounted on the support frame and has an opening on its top surface. The longitudinal pressurization unit includes a pressurization cylinder and a pressurization base plate. The pressurization cylinder is vertically fixed to the top of the support frame, and its telescopic rod is connected to the pressurization plate via a flange. The pressurization plate is located above the opening on the top surface of the experimental chamber. The transverse wheel simulation pressurization unit includes a push cylinder and a tire simulation assembly. The frame is movably connected to the telescopic rod of the push cylinder.

2. The simulation test apparatus according to claim 1, characterized in that, One side wall of the experimental chamber is a PVC transparent panel (21), and several connecting pipes are provided on its side wall. A vibration motor is provided at the bottom of the experimental chamber.

3. The simulation test apparatus according to claim 1, characterized in that, The simulation test device also includes several sensor array grids, which include flexible grids and several force sensors disposed on the flexible grids. The flexible grids are thin materials with arrayed openings on their surfaces, and the sensors are disposed on the flexible grids.

4. The simulation test apparatus according to claim 1, characterized in that, The longitudinal pressurization unit also includes a replaceable pressurization head, which is detachably fixed to the pressurization base plate by bolts.

5. The simulation test apparatus according to claim 4, characterized in that, The longitudinal pressurization unit also includes several guide rods, the upper and lower ends of which are fixed on the support frame and pass through guide holes on both sides of the pressurization base plate.

6. The simulation test apparatus according to claim 1, characterized in that, The tire simulation assembly includes a frame, an upper bearing wheel assembly, and a lower pressure wheel assembly. The frame is a rectangular frame with openings at the top and bottom, enclosed by steel plates. The upper bearing wheel assembly and the lower pressure wheel assembly include several rotating shafts. The two ends of the rotating shafts are rotatably connected to the frame via bearings. The multiple rotating shafts of the upper bearing wheel assembly and the lower pressure wheel assembly are evenly distributed in the upper and lower parts of the frame. Multiple simulated wheel segments are arrayed along the length of the rotating shafts. The diameter of the simulated wheel segments is larger than other areas of the rotating shafts. The top of the simulated wheel segments of the upper bearing wheel assembly and the bottom of the simulated wheel segments of the lower pressure wheel assembly protrude from the top and bottom surfaces of the frame.

7. The simulation test apparatus according to claim 6, characterized in that, A connecting flange seat is fixedly installed on the frame. The connecting flange seat includes a base and a connecting pipe. A square hole is provided on the connecting pipe. The end of the telescopic rod of the push cylinder is provided with a square hole, and the top of the rod is inserted into the connecting pipe. A square connecting pin is inserted into the square hole at the end of the connecting pipe and the telescopic rod. The diameter of the end of the telescopic rod is smaller than the inner diameter of the connecting pipe.

8. The simulation test apparatus according to claim 7, characterized in that, In the direction of pushing the hydraulic cylinder to extend or retract, the difference between the length of the square hole at the end of the extension rod and the size of the square connecting pin is greater than in the other direction.

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