A device for testing the camber of a road bed

Abstract

The present application relates to the technical field of roadbed testing, and specifically discloses a roadbed warping testing device, which comprises a bottom plate arranged horizontally, a rotating shaft fixed horizontally on the bottom plate, a support plate connected with the rotating shaft, a first driving device used for driving the support plate to rotate around the rotating shaft, a pressing head arranged vertically above the middle part of the support plate, a second driving device used for driving the pressing head to descend, a baffle arranged at one end of the support plate close to the rotating shaft, a clamping plate arranged at one side of the baffle close to the pressing head, and a probe assembly arranged above the support plate; the support plate is used for supporting a roadbed template, the contact position of the lower end of the pressing head and the roadbed template is a pressing point; one side of the baffle close to the clamping plate is an arc with the pressing point as the center, the clamping plate is clamped at one end of the roadbed template close to the baffle, and one side of the clamping plate close to the baffle is an arc matched with the baffle. The roadbed warping testing device can effectively test the stress warping condition of the roadbed under a certain inclined state.

Description

Technical Field

[0001] This invention relates to the technical field of roadbed testing, and more specifically, to a roadbed warping test device. Background Technology

[0002] The roadbed warp test involves placing a roadbed template of a specific shape, cut from a previous piece, onto a fixture. Then, using hydraulic equipment such as a jack and a pressing head, vertical pressure is applied to the center of the template's upper surface. Under the force of the pressing head, the roadbed itself deforms to a certain extent, resulting in a slight bend (warp) around its edges. The degree of warp can be measured at various points on the roadbed template using a probe capable of measuring small displacements. This simulates the deformation of the road surface under vehicle pressure, thus allowing for the assessment of whether the roadbed composition and thickness meet the requirements in the corresponding paving area. Therefore, current warp testing devices are primarily used for testing roadbed templates in a horizontal state.

[0003] However, in road construction projects in mountainous areas, long and steep slopes are a typical structural form. These roadbeds operate at an angle for extended periods, with loads from vehicles and structures acting vertically along the direction of gravity. Conventional roadbed warping devices, when clamping a roadbed template in a horizontal state, hinder the template's warping deformation due to the template's inclination. This fails to accurately simulate the actual stress environment of a steep slope, resulting in significant discrepancies between the warping resistance data obtained and actual engineering conditions. Consequently, these devices are insufficient to effectively guide the structural design, construction quality inspection, and subsequent operation and maintenance of steep slope roadbeds. Therefore, a device capable of testing the warping resistance of roadbeds with significant inclinations is needed. Summary of the Invention

[0004] The purpose of this invention is to provide a roadbed warping test device, which can effectively test the stress warping of a roadbed under a certain inclination.

[0005] This invention is achieved through the following technical solution: The roadbed warping test device of this invention includes a horizontally arranged base plate, a rotating shaft horizontally fixed on the base plate, a support plate rotatably connected to the rotating shaft, a first driving device for driving the support plate to rotate around the rotating shaft, a pressing head vertically arranged above the middle of the support plate, a second driving device for driving the pressing head to descend, a baffle plate arranged on the support plate near one end of the rotating shaft, a clamping plate arranged on the side of the baffle plate near the pressing head, and a probe assembly arranged above the support plate; the support plate is used to support the roadbed sample, and the contact point between the lower end of the pressing head and the roadbed sample is the pressing point; the side of the baffle plate near the clamping plate is an arc shape with the pressing point as the center, the clamping plate is clamped on the end of the roadbed sample plate near the baffle plate, and the side of the clamping plate near the baffle plate is an arc shape that fits against the baffle plate.

[0006] Furthermore, the clamping plate has a C-shaped structure and is clamped to the ends and both sides of the roadbed template.

[0007] Furthermore, multiple threaded holes are provided at both ends of the clamping plate, and connecting bolts are threaded into the threaded holes; multiple connecting holes are provided on both sides of the end of the roadbed template near the clamping plate, and one connecting bolt is inserted into one of the connecting holes.

[0008] Furthermore, the baffle has multiple elongated sliding holes along its length, and the clamping plate has multiple sliding strips on the side near the baffle; one of the sliding strips is slidably disposed in one of the sliding holes, and the length direction of the sliding hole is perpendicular to the length direction of the baffle; lubricating oil is provided between the baffle and the clamping plate.

[0009] Furthermore, a lubrication layer is provided between the roadbed template and the support plate.

[0010] Furthermore, the lubrication layer includes a separating cloth disposed between the roadbed template and the support plate; the separating cloth is adhered to the underside of the roadbed template by an adhesive, the separating cloth is made of a waterproof material, and lubricating oil is disposed between the separating cloth and the support plate.

[0011] Furthermore, the support plate has multiple reinforcing ribs on its lower side; the first driving device includes multiple first support rods fixedly connected to the lower side of the support plate, multiple second support rods fixedly connected to the lower ends of the first support rods, a support seat rotatably connected to the second support rods, a first pad attached to the lower end wall of the support seat, a first hydraulic cylinder fixedly connected to the lower side of the first pad, and a second pad located at the lower end of the first hydraulic cylinder; the second support rods, the first pad, and the second pad are all horizontally arranged; the second pad is attached to the upper surface of the base plate.

[0012] Furthermore, a third support rod is hinged to the lower side of the support plate away from the rotating shaft, and a support tube is hinged to the upper side of the base plate; the side wall of the third support rod has a plurality of first insertion holes along the length direction, and the side wall of the support tube has a plurality of second insertion holes along the length direction; the third support rod is slidably disposed in the support tube; the first insertion holes and the second insertion holes correspond one-to-one; and the pin is simultaneously inserted into the first insertion hole and the second insertion hole.

[0013] Furthermore, the second driving device includes a vertically arranged square frame, an inverted U-shaped fixing plate fixedly mounted on the base plate, a second hydraulic cylinder vertically mounted in the fixing plate, a pair of limiting tubes vertically mounted on both sides of the frame, and a limiting rod slidably mounted in the limiting tubes; the frame is suspended on the base plate, and the support plate is suspended through the frame; the upper end of the pressing head is fixedly connected to the upper end of the frame, the lower end of the frame is located in the fixing plate, the movable end of the second hydraulic cylinder is connected to the fixing plate, the cylinder body of the second hydraulic cylinder is fixedly connected to the frame, and the limiting rod is fixedly connected to the base plate.

[0014] Furthermore, both sides of the upper surface of the support plate are provided with surrounding plates; a limiting plate is fixedly provided on the surrounding plate, and a sliding groove is opened on the side of a pair of limiting plates that are close to each other. The length direction of the limiting plate is parallel to the length direction of the surrounding plate; multiple probe assemblies are provided, and the multiple probe assemblies are distributed along the length direction of the limiting plate; each probe assembly includes a horizontally arranged sliding plate and multiple probes disposed on the lower side of the sliding plate; both ends of the sliding plate are slidably disposed in a pair of sliding grooves, and the lower end of the probe abuts against the roadbed template. The probe is perpendicular to the upper surface of the roadbed template.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: In the use of the roadbed warping test device of the present invention, a pre-cut roadbed template is placed on a support plate, a clamp is used to clamp the end of the roadbed template near the baffle, and the clamp is attached to the baffle. Then, a first driving device is used to drive the support plate and the roadbed template to rotate to a specified tilt angle. Then, a second driving device is used to drive the pressing head to move down to a position that contacts the middle of the upper surface of the roadbed template. The probe assembly is installed at a suitable position above the roadbed template and abuts against the roadbed template. The second driving device continues to drive the pressing head to move down, slowly applying force to the roadbed template until the upper limit. The relationship curve between the amount of deformation of the roadbed template detected by the probe assembly and the force of the pressing head is recorded during this process. During this process, when the pressing head applies force to the roadbed template, the template not only deforms itself, exhibiting a slight upward warping at both ends, but also transmits almost all of the force to the clamping plate and the baffle. However, because the contact surface between the clamping plate and the baffle is curved, and this curved surface perfectly conforms to the movement path of the ends of the roadbed template during deformation, the resistance of the baffle to the movement of the roadbed template and clamping plate is minimized. This results in the movement trajectory of the roadbed template's ends more closely resembling the actual movement trajectory, leading to more accurate measurements. This device can also test the warping state of roadbed templates with different thicknesses and inclination angles under stress. Attached Figure Description

[0016] Figure 1 A schematic diagram of the roadbed warping test device provided in an embodiment of the present invention from one perspective;

[0017] Figure 2 This is a two-view structural schematic diagram of the roadbed warping test device provided in an embodiment of the present invention;

[0018] Figure 3 This is a three-view structural schematic diagram of the roadbed warping test device provided in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the base plate portion provided in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the support plate portion provided in an embodiment of the present invention;

[0021] Figure 6 for Figure 5 A schematic diagram of the partially unfolded structure;

[0022] Figure 7 This is a schematic diagram of the clamping plate portion provided in an embodiment of the present invention.

[0023] Icons: 10-Base plate, 11-Shaft, 12-Support plate, 121-Enclosure plate, 122-Limiting plate, 123-Slide groove, 124-Reinforcing rib, 13-Pressing head, 14-Baffle, 141-Slide hole, 15-Clamping plate, 151-Connecting bolt, 152-Slide strip, 16-Isolation cloth, 20-First driving device, 21-First support rod, 22-Second support rod, 23-Support base, 24-First 25-First hydraulic cylinder, 26-Second pad, 27-Third support rod, 28-Support tube, 29-First insertion hole, 210-Second insertion hole, 211-Pin rod, 30-Second drive device, 31-Frame, 32-Fixing plate, 33-Second hydraulic cylinder, 34-Limiting tube, 35-Limiting rod, 40-Probe assembly, 41-Slide plate, 42-Probe, 50-Roadbed template, 51-Connecting hole. Detailed Implementation

[0024] Example

[0025] The following description, in conjunction with specific embodiments, further illustrates the points, as shown in the appendix. Figure 1 -Appendix Figure 7As shown, the roadbed warping test device of this embodiment includes a horizontally arranged base plate 10, a rotating shaft 11 horizontally fixed on the base plate 10, a support plate 12 rotatably connected to the rotating shaft 11, a first driving device 20 for driving the support plate 12 to rotate around the rotating shaft 11, a pressing head 13 vertically arranged above the middle of the support plate 12, a second driving device 30 for driving the pressing head 13 to descend, and a baffle 14 provided at one end of the support plate 12 near the rotating shaft 11. A clamping plate 15 is provided on the side of the baffle 14 near the pressing head 13, and a probe assembly 40 is provided above the support plate 12; the support plate 12 is used to support the roadbed template 50, and the contact point between the lower end of the pressing head 13 and the roadbed template 50 is the pressing point; the side of the baffle 14 near the clamping plate 15 is an arc with the pressing point as the center, the clamping plate 15 is clamped on the end of the roadbed template 50 near the baffle 14, and the side of the clamping plate 15 near the baffle 14 is an arc that fits against the baffle 14. Specifically, during use, the pre-cut roadbed template 50 is placed on the support plate 12, and the end of the roadbed template 50 near the baffle 14 is clamped with the clamp 15 and attached to the baffle 14. Then, the first drive device 20 drives the support plate 12 and the roadbed template 50 to rotate to the specified tilt angle. Then, the second drive device 30 drives the pressing head 13 to move down to the position that contacts the middle of the upper surface of the roadbed template 50. The probe assembly 40 is installed at a suitable position above the roadbed template 50 and abuts against the roadbed template 50. The second drive device 30 continues to drive the pressing head 13 to move down, slowly applying force to the roadbed template 50 until the upper limit. During this process, the relationship curve between the amount of deformation of the roadbed template 50 detected by the probe assembly 40 and the force of the pressing head 13 is recorded. During this process, when the pressing head 13 applies force to the roadbed template 50, the roadbed template 50 not only deforms itself, with a slight upward warping at both ends, but also transmits the force to the clamping plate 15 and the baffle 14. However, since the contact surface between the clamping plate 15 and the baffle 14 is an arc-shaped surface, and this arc-shaped surface completely conforms to the movement path of the ends of the roadbed template 50 when it deforms, the resistance of the baffle 14 to the movement of the roadbed template 50 and the clamping plate 15 is minimized. In this way, the movement trajectory of the two ends of the roadbed template 50 is closer to the actual movement trajectory, and the final measured result is more accurate. This device can also test the warping state of roadbed templates 50 with different thicknesses and inclination angles under force.

[0026] In this embodiment, the clamping plate 15 has a C-shaped structure and is clamped to the ends and both sides of the roadbed template 50. Specifically, the C-shaped clamping plate 15 can be better fixed to the ends of the roadbed template 50. Although the clamping plate 15 needs to be fixed to the roadbed template 50 as an integral structure, the weight of the clamping plate 15 has a negligible impact on the test compared to the weight of the roadbed template 50. If the roadbed template 50 is made of a special material that makes it lightweight, the same clamping plate 15 can also be fixed to the other end of the roadbed template 50 so that the weight of the two ends of the roadbed template 50 is completely consistent.

[0027] In this embodiment, the clamping plate 15 has multiple threaded holes at both ends, and connecting bolts 151 are threaded into these holes. The roadbed template 50 has multiple connecting holes 51 on both sides of the end closest to the clamping plate 15, with one connecting bolt 151 inserted into each connecting hole 51. Specifically, the connecting holes 51 at the end of the roadbed template 50 need to be drilled in advance using an electric drill. Only a few small holes need to be drilled, and the resulting mass change will have almost no impact on the test results. However, this makes the connection between the clamping plate 15 and the roadbed template 50 more secure.

[0028] In this embodiment, the baffle 14 has multiple elongated sliding holes 141 along its length, and the clamping plate 15 has multiple sliding strips 152 on the side near the baffle 14. Each sliding strip 152 is slidably disposed in a sliding hole 141, and the length direction of the sliding hole 141 is perpendicular to the length direction of the baffle 14. Lubricating oil is provided between the baffle 14 and the clamping plate 15. Specifically, the cooperation between the sliding strip 152 and the sliding hole 141 is to limit the horizontal displacement of the clamping plate 15, but does not limit the upward sliding of the clamping plate 15 on the baffle 14. Furthermore, the sliding strip 152 can also serve as an indicator of the displacement of the end of the roadbed template 50 and the clamping plate 15. That is, the degree of warping of the end of the roadbed template 50 can be detected by measuring the degree of displacement of the sliding strip 152 during the test (it can also be detected by the probe assembly 40, but the sliding strip 152 can amplify the deformation of the end of the roadbed template 50 to a certain extent).

[0029] In this embodiment, a lubrication layer is provided between the roadbed template 50 and the support plate 12. The lubrication layer includes an isolation cloth 16 disposed between the roadbed template 50 and the support plate 12; the isolation cloth 16 is adhered to the underside of the roadbed template 50 by adhesive, the isolation cloth 16 is made of waterproof material, and lubricating oil is provided between the isolation cloth 16 and the support plate 12. Specifically, setting a lubrication layer between the roadbed template 50 and the support plate 12 can effectively reduce the friction between the roadbed template 50 and the support plate 12, thus minimizing the impact of friction on the deformation of the roadbed template 50. The lubrication layer mainly consists of the isolation cloth 16 and lubricating oil. The isolation cloth 16 is glued to the underside of the roadbed template 50 in advance (the isolation cloth 16 itself has a certain elasticity, and it hardly hinders the deformation of the roadbed template 50). The lubricating oil between the isolation cloth 16 and the support plate 12 can effectively reduce the friction between the isolation cloth 16 and the support plate 12. This means that the friction between the roadbed template 50 and the isolation cloth 16 is minimal. Furthermore, this method ensures that the roadbed template 50 causes almost no damage to the support plate 12. The support plate 12 can maintain its integrity and smoothness for a long time, and the roadbed template 50 will not damage the lubricating oil layer on the upper surface of the support plate 12. It should be noted that the isolation cloth 16 is for single use only.

[0030] In this embodiment, the support plate 12 has multiple reinforcing ribs 124 on its lower side; the first driving device 20 includes multiple first support rods 21 fixedly connected to the lower side of the support plate 12, multiple second support rods 22 fixedly connected to the lower ends of the first support rods 21, a support base 23 rotatably connected to the second support rods 22, a first pad 24 attached to the lower end wall of the support base 23, a first hydraulic cylinder 25 fixedly connected to the lower side of the first pad 24, and a second pad 26 located at the lower end of the first hydraulic cylinder 25; the second support rods 22, the first pad 24, and the second pad 26 are all horizontally arranged; the second pad 26 is attached to the upper surface of the base plate 10. Specifically, since the support plate 12 needs to withstand a large force, the reinforcing ribs 124 on the lower side of the support plate 12 can effectively improve the strength of the support plate 12. Furthermore, the multiple first support rods 21 on the lower side of the support plate 12 have a wider distribution range, resulting in a more uniform force distribution on the lower side of the support plate 12, thus making the support plate 12 less prone to deformation. The first hydraulic cylinder 25 on the base plate 10 can push the first pad 24, support seat 23, second support rod 22 and first support rod 21 upward, thereby adjusting the tilt angle of the support plate 12.

[0031] In this embodiment, a third support rod 27 is hinged to the lower side of the support plate 12 away from the rotating shaft 11, and a support tube 28 is hinged to the upper side of the base plate 10. The side wall of the third support rod 27 has a plurality of first insertion holes 29 along the length direction, and the side wall of the support tube 28 has a plurality of second insertion holes 210 along the length direction. The third support rod 27 is slidably disposed in the support tube 28, and the first insertion holes 29 and the second insertion holes 210 correspond one to one. The pin rod 211 is inserted into the first insertion hole 29 and the second insertion hole 210 at the same time. Specifically, the support plate 12 can also be supported by the third support rod 27 and the support tube 28. The third support rod 27 and the support tube 28 can be limited by inserting the pin rod 211 into the first insertion hole 29 and the second insertion hole 210. Since the movement of the second support rod 22 is arc-shaped, when the second support rod 22 moves, the support seat 23 and the first pad 24 will slide. After the support plate 12 is moved to a predetermined angle by the first hydraulic cylinder 25, the third support rod 27 and the support tube 28 are used to temporarily support the support rod. Then the first hydraulic cylinder 25 lowers the first pad 24 and separates it from the support seat 23. Then the position of the first hydraulic cylinder 25 is adjusted so that the first pad 24 is directly below the support seat 23. The first hydraulic cylinder 25 is then used to support the support seat 23, the first support rod 21, the second support rod 22, the support plate 12 and the roadbed template 50. At the same time, the third support rod 27 and the support tube 28 can also play a supporting role.

[0032] The second driving device 30 in this embodiment includes a vertically arranged square frame 31, an inverted U-shaped fixing plate 32 fixed on the base plate 10, a second hydraulic cylinder 33 vertically arranged in the fixing plate 32, a pair of limiting tubes 34 vertically arranged on both sides of the frame 31, and a limiting rod 35 slidably arranged in the limiting tubes 34; the frame 31 is suspended on the base plate 10, and the support plate 12 is suspended through the frame 31; the upper end of the pressing head 13 is fixedly connected to the upper end of the frame 31, the lower end of the frame 31 is arranged in the fixing plate 32, the movable end of the second hydraulic cylinder 33 is connected to the fixing plate 32, the cylinder body of the second hydraulic cylinder 33 is fixedly connected to the frame 31, and the limiting rod 35 is fixedly connected to the base plate 10. Specifically, frame 31 is a square closed structure, while fixed plate 32 is fixedly connected to base plate 10. When second hydraulic cylinder 33 pushes fixed plate 32, the hydraulic cylinder itself moves downward, thereby driving frame 31 downward, and ultimately driving pressing head 13 downward, applying a vertical (gravity direction) force to roadbed template 50. The cooperation of limiting tube 34 and limiting rod 35 ensures that frame 31 and pressing head 13 can only move vertically. It should be noted that the angle between pressing head 13 and roadbed template 50 can be changed by altering the tilt angles of frame 31, limiting rod 35, and second hydraulic cylinder 33 (the tilt angle of roadbed template 50 itself remains unchanged).

[0033] In this embodiment, the upper surface of the support plate 12 is provided with a surrounding plate 121 on both sides; a limiting plate 122 is fixedly provided on the surrounding plate 121, and a sliding groove 123 is provided on the side of the pair of limiting plates 122 that are close to each other. The length direction of the limiting plate 122 is parallel to the length direction of the surrounding plate 121; multiple probe assemblies 40 are provided, and the multiple probe assemblies 40 are distributed along the length direction of the limiting plate 122; the probe assembly 40 includes a horizontally arranged sliding plate 41 and multiple probes 42 provided on the lower side of the sliding plate 41; the two ends of the sliding plate 41 are respectively slidably disposed in a pair of sliding grooves 123, and the lower end of the probe 42 abuts against the roadbed template 50. The probe 42 is perpendicular to the upper surface of the roadbed template 50. Specifically, a surrounding plate 121 is provided on the support plate 12 to position and restrict the roadbed template 50. A limiting plate 122 and a sliding groove 123 are provided on the surrounding plate 121, allowing the probe assembly 40 to slide in the sliding groove 123. This has two advantages: first, the probe assembly 40 can be completely removed from the support plate 12, and the roadbed template 50 can be fixed on the support plate 12 before installing the probe assembly 40; second, the number and distribution of the probe assembly 40 can be adjusted according to actual needs. The probe 42 in the probe assembly 40 can be a conventional probe capable of measuring minute displacements; this embodiment does not impose any restrictions or specific descriptions on it.

[0034] In summary, the roadbed warping test device of this embodiment, when in use, places the pre-cut roadbed template 50 on the support plate 12, clamps the end of the roadbed template 50 near the baffle 14 with the clamp 15, and the clamp 15 is attached to the baffle 14. Then, the first driving device 20 drives the support plate 12 and the roadbed template 50 to rotate to the specified tilt angle. Then, the second driving device 30 drives the pressing head 13 to move down to the position that contacts the middle of the upper surface of the roadbed template 50. The probe assembly 40 is installed at a suitable position above the roadbed template 50 and abuts against the roadbed template 50. The second driving device 30 continues to drive the pressing head 13 to move down, slowly applying force to the roadbed template 50 until the upper limit. During this process, the relationship curve between the amount of deformation of the roadbed template 50 detected by the probe assembly 40 and the force of the pressing head 13 is recorded. During this process, when the pressing head 13 applies force to the roadbed template 50, the roadbed template 50 not only deforms itself, with a slight upward warping at both ends, but also transmits the force to the clamping plate 15 and the baffle 14. However, since the contact surface between the clamping plate 15 and the baffle 14 is an arc-shaped surface, and this arc-shaped surface completely conforms to the movement path of the ends of the roadbed template 50 when it deforms, the resistance of the baffle 14 to the movement of the roadbed template 50 and the clamping plate 15 is minimized. In this way, the movement trajectory of the two ends of the roadbed template 50 is closer to the actual movement trajectory, and the final measured result is more accurate. This device can also test the warping state of roadbed templates 50 with different thicknesses and inclination angles under force.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A roadbed warping test device, characterized in that: The device includes a horizontally set base plate, a rotating shaft horizontally fixed on the base plate, a support plate rotatably connected to the rotating shaft, a first driving device for driving the support plate to rotate around the rotating shaft, a pressing head vertically set above the middle of the support plate, a second driving device for driving the pressing head to descend, a baffle set on the support plate near one end of the rotating shaft, a clamping plate set on the baffle near the pressing head, and a probe assembly set above the support plate. The support plate is used to support the roadbed template, and the contact point between the lower end of the pressing head and the roadbed template is the pressing point; the side of the baffle near the clamping plate is an arc shape with the pressing point as the center, the clamping plate is clamped on the end of the roadbed template near the baffle, and the side of the clamping plate near the baffle is an arc shape that fits against the baffle; The clamping plate has a C-shaped structure and is clamped to the end and both sides of the roadbed template. Multiple threaded holes are provided at both ends of the clamping plate, and connecting bolts are threaded into these holes. Multiple connecting holes are provided on both sides of the end of the roadbed template closest to the clamping plate, with one connecting bolt inserted into each hole. Multiple elongated sliding holes are provided along the length of the baffle, and multiple sliding strips are provided on the side of the clamping plate closest to the baffle. Each sliding strip is slidably disposed in a sliding hole, the length of which is perpendicular to the length of the baffle. Lubricating oil is provided between the baffle and the clamping plate.

2. The roadbed warping test device according to claim 1, characterized in that: A lubrication layer is provided between the roadbed template and the support plate.

3. The roadbed warping test device according to claim 2, characterized in that: The lubrication layer includes a separation cloth disposed between the roadbed template and the support plate; The isolation cloth is adhered to the underside of the roadbed template by an adhesive. The isolation cloth is made of waterproof material, and lubricating oil is provided between the isolation cloth and the support plate.

4. The roadbed warping test device according to claim 1, characterized in that: The support plate is provided with multiple reinforcing ribs on its lower side; The first driving device includes a plurality of first support rods fixedly connected to the lower side of the support plate, a plurality of second support rods fixedly connected to the lower ends of the first support rods, a support seat rotatably connected to the second support rods, a first pad plate attached to the lower end wall of the support seat, a first hydraulic cylinder fixedly connected to the lower side of the first pad plate, and a second pad plate disposed at the lower end of the first hydraulic cylinder. The second support rod, the first pad, and the second pad are all horizontally arranged; the second pad is attached to the upper surface of the base plate.

5. The roadbed warping test device according to claim 4, characterized in that: A third support rod is hinged to the lower side of the end of the support plate away from the rotating shaft, and a support tube is hinged to the upper side of the base plate; The third support rod has multiple first insertion holes along its length on its sidewall, and the support tube has multiple second insertion holes along its sidewall. The third support rod is slidably disposed in the support tube. The first insertion holes and the second insertion holes correspond one-to-one, and the pin is inserted into both the first insertion hole and the second insertion hole.

6. The roadbed warping test device according to claim 1, characterized in that: The second driving device includes a vertically arranged square frame, an inverted U-shaped fixing plate fixed to the base plate, a second hydraulic cylinder vertically arranged in the fixing plate, a pair of limiting tubes vertically arranged on both sides of the frame, and a limiting rod slidably arranged in the limiting tubes. The frame is suspended on the base plate, and the support plate is suspended through the frame; the upper end of the pressing head is fixedly connected to the upper end of the frame, the lower end of the frame is located in the fixed plate, the movable end of the second hydraulic cylinder is connected to the fixed plate, the cylinder body of the second hydraulic cylinder is fixedly connected to the frame, and the limiting rod is fixedly connected to the base plate.

7. The roadbed warping test device according to claim 1, characterized in that: Both sides of the upper surface of the support plate are provided with surrounding plates; a limiting plate is fixedly provided on the surrounding plate, and a sliding groove is opened on the side of a pair of limiting plates that are close to each other. The length direction of the limiting plate is parallel to the length direction of the surrounding plate. The probe assembly is provided in multiple ways, and the multiple probe assemblies are distributed along the length direction of the limiting plate; the probe assembly includes a horizontally arranged slide plate and multiple probes disposed on the underside of the slide plate; The two ends of the slide plate are respectively slidably disposed in a pair of the slide grooves, the lower end of the probe abuts against the roadbed template, and the probe is perpendicular to the upper surface of the roadbed template.

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