Road thickness detection device and detection method

Abstract

The present invention relates to the field of road construction detection technology, specifically a road surface thickness detection device and detection method, comprising a cart for installing and moving the detection device; a frame, the frame being arranged on the right end of the cart; a feed assembly, the upper end of the feed assembly being rotatably mounted in the frame, and the lower end of the feed assembly being rotatably inserted in the cart; and a core drill assembly, the core drill assembly being fixedly mounted on the lower end of the feed assembly, and the lower end of the core drill assembly being movably inserted in the cart. The present invention drives the core drill assembly to drill a road surface by the feed assembly. After the road surface drilling is completed, the drill barrel and the drill bit on the core drill assembly are separated, the clamping assembly in the drill bit clamps the core sample, and then the core sample and the drill bit are removed from the drill barrel. The rear end of the core sample can be inspected, and there is no need to knock the drill barrel after drilling the road surface in order to remove the core sample, thereby avoiding damage to the core sample.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction detection, in particular to a road surface thickness detection device and a detection method. Background Art

[0002] In pavement engineering, the thickness of each layer is closely related to the overall strength of the road. Only when the thickness is guaranteed can the strength of each layer and the whole of the pavement be guaranteed. At present, the core drilling method is a more commonly used method for detecting the thickness of the pavement. After the core sample is taken out from the pavement by a core drilling machine, the thickness of the core sample is directly measured to measure the thickness of the pavement. The patent document with the publication number CN111351416B discloses a device for measuring the thickness of the pavement core sample by the core drilling method, including a frame, a base plate arranged at the bottom end of the frame, a roller arranged on the base plate, a push rod arranged on one side of the frame, a mounting bracket arranged in the frame, a core barrel rotatably connected to the mounting bracket, an engine arranged on the mounting bracket and used to drive the core barrel to rotate, and a linkage mechanism is provided between the scale and the mounting bracket. It does not need to take the core sample out of the core barrel to realize the function of detecting the thickness of the pavement, which reduces the damage caused by the core sample being affected when taking out the core sample. The phenomenon of damage affecting the detection accuracy. When the above scheme detects the pavement thickness, a ruler is used to detect the drill hole. However, the depth of the pavement drill hole is uncertain and there is a certain amount of soil at the bottom of the pavement. After the ruler is inserted into the drill hole, it is easy to insert into the soil, so that the lower end of the ruler cannot be flush with the bottom of the pavement, resulting in inaccurate detection data. In addition, when the existing pavement thickness is detected, the core sample is easy to remain in the core barrel after the core drill machine drills the pavement. When the core sample is taken out of the core barrel, the core barrel needs to be knocked. The core barrel is vibrated by the knocking, which makes the core sample inside easy to be damaged or broken, thereby causing unnecessary trouble for its thickness detection. For this reason, we propose a pavement thickness detection device and detection method to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a pavement thickness detection device and detection method to solve the problem raised in the above background technology that when detecting the thickness of a pavement, a core sample is likely to remain in the core barrel after the core drill drills a hole in the pavement. When the core sample is taken out of the core barrel, the core barrel needs to be knocked. The core barrel is vibrated by the knocking, which makes the core sample inside easily damaged or broken, thereby causing unnecessary trouble in its thickness detection.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a road thickness detection device and detection method, comprising a cart for installing and moving the detection device;

[0005] a frame disposed on a right end of the cart;

[0006] A feed assembly, the upper end of which is rotatably mounted in the frame, and the lower end of which is rotatably inserted in the trolley, and the feed assembly is used to provide a downward movement when drilling a hole in the road surface;

[0007] A core drill assembly, the core drill assembly is fixedly mounted on the lower end of the feed assembly, the lower end of the core drill assembly is movably inserted into the trolley, and the core drill assembly is used to improve the effect of drilling and sampling the road surface when detecting the road surface thickness;

[0008] The anti-water seepage component is fixedly mounted on the feed component, the lower end of the anti-water seepage component is movably inserted into the trolley, and the lower end of the anti-water seepage component is located at the lower side of the trolley.

[0009] Preferably, the feeding assembly includes two groups of screws and two groups of pulleys, the two groups of screws are rotatably installed between the upper end of the frame and the trolley, the two groups of pulleys are fixedly installed on the upper ends of the two groups of screws, and the two groups of pulleys are rotatably sleeved with transmission belts, and the upper ends of the screws installed at the rear end of the trolley and the frame are fixedly installed with rotating handles, and the two groups of pulleys are fixedly sleeved with protective covers, and the lower sides of the protective covers are fitted with the frame, and the lower ends of the two groups of screws are threadedly sleeved with mounting plates, and the two groups of screws are located in the front and rear diagonals of the mounting plate.

[0010] Preferably, the core drilling assembly includes a servo motor and a drill barrel, the servo motor is fixedly mounted on the mounting plate, the output end of the servo motor is inserted into the mounting plate, the upper end of the drill barrel is movably mounted on the output end of the servo motor, and the core drilling assembly also includes a splitting assembly and a clamping assembly.

[0011] Preferably, the disassembly component includes a drill bit, the upper end of the drill bit is movably inserted in the lower end of the drill barrel, a plurality of groups of first movable grooves are annularly provided in the drill bit, and screw sleeves are movably installed at the openings of the plurality of first movable grooves, a plurality of groups of first grooves are annularly provided on the outer wall of the lower end of the drill barrel, bolts are rotatably installed in the plurality of first grooves, a plurality of groups of second grooves are annularly provided on the inner wall of the lower end of the drill barrel, a plurality of groups of screw sleeves are movably inserted in the second grooves, and a plurality of groups of bolts are inserted in the plurality of screw sleeves through threads.

[0012] Preferably, the clamping assembly includes multiple groups of second movable grooves, which are opened on the inner wall of the upper end of the drill bit, and first springs are installed in the multiple groups of second movable grooves. Clamps are movably installed at the openings of the multiple groups of second movable grooves, and the clamps are against the multiple groups of first springs.

[0013] Preferably, the anti-water seepage assembly includes two groups of sleeves, the two groups of sleeves are fixedly mounted on the mounting plate at two diagonal corners opposite to the screw rod, the two groups of sleeves are fixedly mounted inside the second spring, the two groups of sleeves have a movable rod movably inserted at the openings of the lower ends of the two groups of sleeves, the upper ends of the two groups of movable rods are against the lower ends of the two groups of second springs, the lower ends of the two groups of movable rods are inserted on the trolley, the lower ends of the two groups of movable rods are welded on the lower ends of the two groups of movable rods are annularly provided with multiple groups of third grooves on the inner wall of the annular plate, a sponge ring is movably installed on the inner wall of the annular plate, a plurality of groups of first protrusions are annularly provided on the outer wall of the sponge ring, the plurality of groups of first protrusions are movably inserted into the plurality of groups of third grooves, the annular plate has multiple groups of third movable grooves annularly provided, the plurality of groups of third movable grooves are fixedly mounted in the plurality of groups of third movable grooves, and the openings of the plurality of groups of third movable grooves are movably installed with limiting blocks, the plurality of groups of limit blocks are movably inserted in the third groove, and the lower sides of the plurality of groups of limit blocks are in contact with the upper sides of the first protrusions.

[0014] Preferably, a sealing gasket is glued on the lower side of the annular plate, and the sealing gasket is made of rubber material.

[0015] Preferably, second protrusions are welded and installed at the four corners of the front and rear sides of the cart, and supporting feet are inserted into the four groups of the second protrusions through threads.

[0016] Preferably, scales are provided at the four corners of the front and rear sides of the cart, and the lower ends of the scales are flush with the upper sides of the second protrusions.

[0017] Preferably, a road surface thickness detection method includes the above-mentioned road surface thickness detection device, and the detection steps are as follows:

[0018] A. Move the detection device to the road surface where the detection is to be made by using a cart, test the detection device first, and then fix the detection device stably on the road surface;

[0019] B. Use the feed assembly to drive the core drill assembly downward so that the core drill assembly drills a hole in the road surface;

[0020] C. After drilling a hole in the road surface through the core drilling assembly, keep spraying cooling water on the drill barrel and drill bit while the core drilling assembly is drilling the hole in the road surface;

[0021] D. After the drill barrel and drill bit on the core drilling assembly drill into the bottom of the road surface, the feed assembly drives the core drilling assembly upward, takes the drill barrel and drill bit on the core drilling assembly out of the road surface, and stops the core drilling assembly;

[0022] E. Separate the drill bit from the drill barrel, and use the clamping assembly to take the core sample out of the drill barrel. Then use a ruler to test the core sample. After testing, mark the core sample and keep it. Finally, restore the testing device to its original state.

[0023] The beneficial effects of the present invention are as follows: the present invention drives the core drilling assembly to drill a hole in the road surface by the feed assembly, and after the drilling of the road surface is completed, the drill barrel and the drill bit on the core drilling assembly are separated, the clamping assembly in the drill bit clamps the core sample, and then the core sample and the drill bit are removed from the drill barrel, and the core sample can be inspected at the rear end, and there is no need to knock the drill barrel after drilling a hole in the road surface to take out the core sample, thereby avoiding damage to the core sample, improving the accuracy of the road surface thickness inspection, and being able to retain the complete core sample, and when drilling a hole in the road surface, the anti-seepage assembly is driven by the feed assembly to fit the road surface, so that the cooling water used by the core drilling assembly when drilling a hole in the road surface will not flow everywhere, and the cooling water can be concentrated and accumulated, which is convenient for centralized treatment after drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic front view of the structure of the present invention;

[0026] Figure 2 It is a schematic front cross-sectional view of the structure of the present invention;

[0027] Figure 3 Schematic diagram of the front cross-section of the structure of the servo motor and the drill barrel in the present invention;

[0028] Figure 4 It is a schematic rear cross-sectional view of the structure of the present invention;

[0029] Figure 5 For the present invention Figure 3 A partial enlarged schematic diagram;

[0030] Figure 6 For the present invention Figure 4 A partial enlarged schematic diagram of B in the middle.

[0031] In the figure: 1. cart; 2. frame; 3. screw; 4. pulley; 5. transmission belt; 6. rotating handle; 7. protective cover; 8. mounting plate; 9. servo motor; 10. drill barrel; 11. drill bit; 12. first movable groove; 13. screw sleeve; 14. first groove; 15. bolt; 16. second groove; 17. second movable groove; 18. first spring; 19. clamping block; 20. sleeve; 21. second spring; 22. movable rod; 23. annular plate; 24. third groove; 25. sponge ring; 26. first protrusion; 27. third movable groove; 28. third spring; 29. ​​limit block; 30. sealing gasket; 31. second protrusion; 32. support foot; 33. scale. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 1-6 , an embodiment of the present invention provides: a road thickness detection device and detection method, including a cart 1 for installing and moving the detection device;

[0034] Frame 2, frame 2 is provided on the right end of the cart 1;

[0035] Feed assembly, the upper end of the feed assembly is rotatably mounted in the frame 2, and the lower end of the feed assembly is rotatably inserted in the trolley 1. The feed assembly is used to provide downward movement when drilling holes in the road surface;

[0036] The core drilling assembly is fixedly mounted on the lower end of the feed assembly, and the lower end of the core drilling assembly is movably inserted into the trolley 1. The core drilling assembly is used to improve the effect of drilling and sampling the road surface when detecting the road surface thickness;

[0037] The anti-seepage component is fixedly mounted on the feed component, and the lower end of the anti-seepage component is movably inserted into the trolley 1. The lower end of the anti-seepage component is at the lower side of the trolley 1. The device drives the core drilling component to drill holes in the road surface through the feed component, and detects the thickness of the road surface through the core sample produced by the core drilling component. In addition, the cooling water used by the core drilling component when drilling holes in the road surface is centrally collected by the anti-seepage component to prevent the cooling water from flowing everywhere during drilling and facilitate subsequent processing.

[0038] Furthermore, the feeding assembly includes two sets of screws 3 and two sets of pulleys 4, the two sets of screws 3 are rotatably installed between the upper end of the frame 2 and the trolley 1, the two sets of pulleys 4 are fixedly installed on the upper ends of the two sets of screws 3, and the two sets of pulleys 4 are rotatably sleeved with a transmission belt 5. The upper ends of the screws 3 installed at the rear end of the trolley 1 and the frame 2 are fixedly installed with a rotating handle 6, and the two sets of pulleys 4 are fixedly sleeved with a protective cover 7, and the lower side of the protective cover 7 is fitted with the frame 2. The lower ends of the two sets of screws 3 are sleeved with a mounting plate 8 through a thread, and the two sets of screws 3 are located in the front and rear diagonals of the mounting plate 8. The rotating handle 6 of this structure drives the two sets of screws 3 to rotate through the two sets of pulleys 4 and the transmission belt 5. The rotation of the two sets of screws 3 drives the core drilling assembly installed on the mounting plate 8 to move downward synchronously, thereby improving the stability of the core drilling assembly in drilling holes downward on the road surface.

[0039] Furthermore, the core drilling assembly includes a servo motor 9 and a drill barrel 10. The servo motor 9 is fixedly mounted on the mounting plate 8. The output end of the servo motor 9 is inserted into the mounting plate 8. The upper end of the drill barrel 10 is movably mounted on the output end of the servo motor 9. The core drilling assembly also includes a splitting assembly and a clamping assembly. This structure drives the drill barrel 10 to drill holes in the road surface through the servo motor 9. The thickness of the road surface can be known by testing the core sample produced by drilling, and the integrity of the core sample taken out of the drill barrel 10 can be checked by the splitting assembly and the clamping assembly.

[0040] Furthermore, the disassembly component includes a drill bit 11, the upper end of the drill bit 11 is movably inserted in the lower end of the drill barrel 10, and a plurality of groups of first movable grooves 12 are annularly provided in the drill bit 11, and screw sleeves 13 are movably installed at the openings of the plurality of groups of first movable grooves 12. A plurality of groups of first grooves 14 are annularly provided on the outer wall of the lower end of the drill barrel 10, and bolts 15 are rotatably installed in the plurality of groups of first grooves 14. A plurality of groups of second grooves 16 are annularly provided on the inner wall of the lower end of the drill barrel 10, and a plurality of groups of screw sleeves 13 are movably inserted in the second grooves 16. A plurality of groups of bolts 15 are threadedly inserted in the plurality of screw sleeves 13. This structure pushes the screw sleeves 13 out of the second grooves 16 by twisting the plurality of first grooves 14, thereby separating the drill bit 11 from the lower end of the drill barrel 10. The drill bit 11 can be disassembled from the drill barrel 10, and then the core sample in the drill barrel 10 can be taken out for inspection.

[0041] Furthermore, the clamping assembly includes multiple groups of second movable grooves 17, which are opened on the inner wall of the upper end of the drill bit 11. First springs 18 are installed in the multiple groups of second movable grooves 17, and clamping blocks 19 are movably installed at the openings of the multiple groups of second movable grooves 17. The clamping blocks 19 are against the multiple groups of first springs 18. This structure clamps the core sample through the clamping blocks 19 in the drill bit 11, so that when the drill bit 11 is taken out, the core sample in the drill barrel 10 is taken out together, so that the core sample is taken out relatively completely, thereby facilitating detection.

[0042] Furthermore, the anti-water seepage component includes two groups of sleeves 20, which are fixedly mounted on the mounting plate 8 at two diagonals opposite to the screw rod 3. A second spring 21 is fixedly mounted inside the two groups of sleeves 20. A movable rod 22 is movably inserted into the openings at the lower ends of the two groups of sleeves 20. The upper ends of the two groups of movable rods 22 are against the lower ends of the two groups of second springs 21. The lower ends of the two groups of movable rods 22 are inserted into the trolley 1. An annular plate 23 is welded to the lower ends of the two groups of movable rods 22. A plurality of groups of third grooves 24 are arranged in an annular manner on the inner wall of the annular plate 23. A sponge ring 25 is movably mounted on the inner wall of the annular plate 23. A plurality of groups of first protrusions 26 are arranged in an annular manner on the outer wall of the sponge ring 25. The plurality of groups of first protrusions 26 are movably inserted into the plurality of groups of third grooves 24. The inner ring plate 23 has a plurality of groups of third movable grooves 27 arranged in an annular manner. , multiple groups of third movable grooves 27 are fixedly installed with third springs 28, and multiple groups of third movable grooves 27 are movably installed with limiting blocks 29 at their openings. Multiple groups of limiting blocks 29 are movably inserted in the third grooves 24, and the lower sides of multiple groups of limiting blocks 29 are in contact with the upper sides of the first protrusions 26. When this structure drills holes in the road surface, the sleeve 20 and the movable rod 22 are driven downward by moving the mounting plate 8, and the annular plate 23 at the lower end of the movable rod 22 is in contact with the ground. Then, as the mounting plate 8 moves downward, the upper end of the movable rod 22 presses the second spring 21 upward in the sleeve 20 and moves. The movable rod 22 and the annular plate 23 are tightly fitted to the ground through the second spring 21, and the cooling water is isolated and absorbed by the sponge ring 25 on the inner wall of the annular plate 23, thereby preventing the cooling water from flowing everywhere.

[0043] Furthermore, a sealing gasket 30 is glued to the lower side of the annular plate 23. The sealing gasket 30 is made of rubber. The structure is attached to the ground through the sealing gasket 30 on the lower side of the annular plate 23, so that the sealing gasket 30 fills the gap between the annular plate 23 and the ground, thereby preventing water from flowing out.

[0044] Furthermore, second protrusions 31 are welded and installed at the four corners of the front and rear sides of the cart 1, and support legs 32 are inserted into the four groups of second protrusions 31 through threads. This structure supports the cart 1 by rotating the support legs 32 to fit it on the ground, thereby preventing the core drilling assembly in the cart 1 from moving when drilling.

[0045] Furthermore, scales 33 are provided at the four corners of the front and rear sides of the cart 1. The lower end of the scale 33 is flush with the upper side of the second protrusion 31. This structure detects the support height of the four corners of the cart 1 by four groups of scales 33 and four groups of legs 32, thereby avoiding tilting of one side when supporting the cart 1.

[0046] Furthermore, a road surface thickness detection method includes the above-mentioned road surface thickness detection device, and the detection steps are as follows:

[0047] A. Move the detection device to the location where the road surface is to be detected by the cart 1, first test the detection device, and then fix the detection device stably on the road surface. This step is to check the status of the detection device after moving the cart 1 on the road surface to prevent malfunction during sampling;

[0048] B. Use the feed assembly to drive the core drill assembly downward so that the core drill assembly can drill holes in the road surface. This step facilitates the detection of road surface thickness by driving the core drill assembly downward through the feed assembly.

[0049] C. After drilling a hole in the road surface through the core drilling assembly, the core drilling assembly continues to spray cooling water on the drill barrel 10 and the drill bit 11 while drilling the hole in the road surface. This step prevents the drill barrel 10 and the drill bit 11 from being damaged by overheating during drilling by spraying cooling water on the drill barrel 10 and the drill bit 11 on the core drilling assembly.

[0050] D. After the drill barrel 10 and drill bit 11 on the core drilling assembly drill into the bottom of the road surface, the feed assembly drives the core drilling assembly upward to remove the drill barrel 10 and drill bit 11 from the road surface. The core drilling assembly is stopped. After the drill barrel 10 and drill bit 11 have penetrated the road surface, the drill barrel 10 and drill bit 11 are removed from the road surface to remove the core sample from the hole.

[0051] E. Separate the drill bit 11 from the drill barrel 10, and take out the core sample from the drill barrel 10 through the clamping assembly. Then, use a ruler to test the core sample. After testing, mark the core sample and keep it. Finally, restore the testing device to its initial state. In this step, the drill bit 11 is separated from the drill barrel 10, and the drill bit 11 takes out the core sample from the drill barrel 10 for testing, and the integrity of the core sample can be ensured.

[0052] Working principle: When testing the road surface, Figure 1 As shown, first move the cart 1 to the position to be tested, then rotate the support leg 32 on the second protrusion 31 to fit the ground, and the support leg 32 supports the four corners of the cart 1 so that the cart 1 can be completely suspended. The height of the support leg 32 is detected by the scale 33 to prevent one side of the cart 1 from tilting. When drilling the road surface, Figure 2 、 Figure 4 、 Figure 5 and Figure 6As shown, first turn the handle 6, and the handle 6 drives the two sets of pulleys 4 and the connected transmission belt 5 to rotate, and the two sets of pulleys 4 drive the two sets of screws 3 to rotate, and the two sets of screws 3 drive the mounting plate 8 to move downward, and the mounting plate 8 moves downward to drive the servo motor 9 and the drill barrel 10 installed on the mounting plate 8 to move downward, and the servo motor 9 drives the drill barrel 10 and the drill bit 11 installed on the lower end to drill holes in the road surface, and when the drill barrel 10 and the drill bit 11 drill downward, the mounting plate 8 drives the sleeve 20 and the movable rod 22 to move downward, and the movable rod 2 2 moves downward and drives the annular plate 23 to fit on the ground, and as the mounting plate 8 continues to move downward, the movable rod 22 on the screw rod 3 slides into the sleeve 20, and the second spring 21 in the sleeve 20 presses against the upper end of the movable rod 22, so that the movable rod 22 and the annular plate 23 can fit tightly on the road surface. The drill barrel 10 and the drill bit 11 need to continuously spray cooling water when drilling holes in the road surface. The cooling water is isolated and washed by the annular plate 23 and the sponge ring 25 on the inner wall, thereby preventing the cooling water from flowing everywhere, and then absorbed by the sponge ring 25 After the cooling water is too much, the limiting block 29 is slid into the third movable groove 27, thereby removing the first protrusion 26 and the sponge ring 25 from the third groove 24 on the inner wall of the annular plate 23, and then inserting a new sponge ring 25 into the third groove 24 through the first protrusion 26. The limiting block 29 in the third movable groove 27 pops out under the elastic force of the third spring 28, thereby fixing the sponge ring 25 on the inner wall of the annular plate 23. After the drill barrel 10 and the drill bit 11 penetrate the road surface, the drill barrel 10 and the drill bit 11 are removed from the road surface and twisted. The bolt 15 in the first groove 14 is rotated to withdraw the screw sleeve 13 from the second groove 16 and slide it into the first movable groove 12, so that the drill bit 11 can be removed from the lower end of the drill barrel 10. When the drill bit 11 is removed from the lower end of the drill barrel 10, the clamping block 19 in the second movable groove 17 at the upper end of the drill bit 11 is popped out and fitted on the outer wall of the core sample under the action of the restoring force of the first spring 18. The clamping block 19 clamps the core sample. When the drill bit 11 is removed, the core sample is removed from the drill barrel 10 together, and the thickness of the core sample can be tested. The above is the entire working principle of the present invention.

[0053] In the description of this application, it should be understood that the terms "front", "rear", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A road thickness detection device, comprising: A cart (1) for installing and moving the detection device; Its characteristics are: a frame (2), said frame (2) being arranged on the right end of the cart (1); A feed assembly, wherein the upper end of the feed assembly is rotatably mounted in the frame (2), and the lower end of the feed assembly is rotatably inserted in the trolley (1), and the feed assembly is used to provide a downward movement when drilling a hole in the road surface; A core drilling assembly, wherein the core drilling assembly is fixedly mounted on the lower end of the feed assembly, and the lower end of the core drilling assembly is movably inserted into the trolley (1), and the core drilling assembly is used to improve the effect of drilling and sampling the road surface when detecting the road surface thickness; An anti-seepage component, the anti-seepage component is fixedly mounted on the feed component, the lower end of the anti-seepage component is movably inserted into the trolley (1), and the lower end of the anti-seepage component is located at the lower side of the trolley (1); The anti-seepage assembly includes two groups of sleeves (20), the two groups of sleeves (20) are fixedly mounted on the mounting plate (8) at two diagonal positions opposite to the screw rod (3), the two groups of sleeves (20) are fixedly mounted with a second spring (21), the lower end openings of the two groups of sleeves (20) are movably inserted with a movable rod (22), the upper ends of the two groups of movable rods (22) are against the lower ends of the two groups of second springs (21), the lower ends of the two groups of movable rods (22) are inserted on the trolley (1), the lower ends of the two groups of movable rods (22) are welded with an annular plate (23), the inner wall of the annular plate (23) is provided with a plurality of groups of third grooves (24), and the inner wall of the annular plate (23) is movably mounted with a sponge ring (25) , multiple groups of first protrusions (26) are annularly arranged on the outer wall of the sponge ring (25), and multiple groups of the first protrusions (26) are movably inserted into multiple groups of third grooves (24). Multiple groups of third movable grooves (27) are annularly opened in the annular plate (23), and third springs (28) are fixedly installed in multiple groups of the third movable grooves (27). Limiting blocks (29) are movably installed at the openings of multiple groups of the third movable grooves (27), and multiple groups of the limiting blocks (29) are movably inserted into the third grooves (24). The lower sides of multiple groups of the limiting blocks (29) are in contact with the upper sides of the first protrusions (26). A sealing gasket (30) is glued to the lower side of the annular plate (23), and the sealing gasket (30) is made of rubber material.

2. A road surface thickness detection device according to claim 1, characterized in that: The feeding assembly comprises two groups of screw rods (3) and two groups of pulleys (4), the two groups of screw rods (3) are rotatably mounted between the upper end of the frame (2) and the trolley (1), the two groups of pulleys (4) are fixedly mounted on the upper ends of the two groups of screw rods (3), and the two groups of pulleys (4) are rotatably sleeved with a transmission belt (5), the upper ends of the screw rods (3) mounted at the rear ends of the trolley (1) and the frame (2) are fixedly mounted with a rotating handle (6), the two groups of pulleys (4) are fixedly sleeved with a protective cover (7), the lower side of the protective cover (7) is fitted with the frame (2), the lower ends of the two groups of screw rods (3) are sleeved with a mounting plate (8) through a thread, and the two groups of screw rods (3) are located in the front and rear diagonals of the mounting plate (8).

3. The road surface thickness detection device according to claim 1, characterized in that: The core drilling assembly comprises a servo motor (9) and a drill barrel (10), wherein the servo motor (9) is fixedly mounted on a mounting plate (8), an output end of the servo motor (9) is inserted into the mounting plate (8), and an upper end of the drill barrel (10) is movably mounted on the output end of the servo motor (9). The core drilling assembly further comprises a splitting assembly and a clamping assembly.

4. A road surface thickness detection device according to claim 3, characterized in that: The disassembly component includes a drill bit (11), the upper end of the drill bit (11) is movably inserted into the lower end of the drill barrel (10), a plurality of groups of first movable grooves (12) are annularly provided in the drill bit (11), and screw sleeves (13) are movably installed at the openings of the plurality of groups of first movable grooves (12), a plurality of groups of first grooves (14) are annularly provided on the outer wall of the lower end of the drill barrel (10), and bolts (15) are rotatably installed in the plurality of groups of first grooves (14), a plurality of groups of second grooves (16) are annularly provided on the inner wall of the lower end of the drill barrel (10), a plurality of groups of screw sleeves (13) are movably inserted into the second grooves (16), and a plurality of groups of bolts (15) are inserted into the plurality of groups of screw sleeves (13) through threads.

5. The road surface thickness detection device according to claim 3, characterized in that: The clamping assembly comprises a plurality of groups of second movable grooves (17), the plurality of groups of second movable grooves (17) being opened on the inner wall of the upper end of the drill bit (11), the plurality of groups of second movable grooves (17) being each installed with a first spring (18), the plurality of groups of second movable grooves (17) being each movably installed with a clamping block (19) at the opening of the plurality of groups of second movable grooves (17), the clamping block (19) being in contact with the plurality of groups of first springs (18).

6. The road surface thickness detection device according to claim 1, characterized in that: Second protrusions (31) are welded and installed at the four corners of the front and rear sides of the cart (1), and supporting feet (32) are inserted into the four groups of the second protrusions (31) through threads.

7. A road surface thickness detection device according to claim 6, characterized in that: Scales (33) are provided at the four corners of the front and rear sides of the cart (1), and the lower end of the scale (33) is flush with the upper side of the second protrusion (31).

8. A detection method for a road surface thickness detection device according to any one of claims 1 to 7, characterized in that: A. Move the detection device to the location where the road surface is to be detected by using a cart (1), first test the detection device, and then firmly fix the detection device on the road surface; B. Use the feed assembly to drive the core drill assembly downward so that the core drill assembly drills a hole in the road surface; C. After drilling a hole in the road surface through the core drilling assembly, the core drilling assembly continues to spray cooling water on the drill barrel (10) and the drill bit (11); D. After the drill barrel (10) and the drill bit (11) on the core drilling assembly have drilled into the bottom of the road surface, the feed assembly drives the core drilling assembly upward, and the drill barrel (10) and the drill bit (11) on the core drilling assembly are taken out of the road surface, and the core drilling assembly is stopped; E. Separate the drill bit (11) from the drill barrel (10), and use the drill bit (11) to take the core sample out of the drill barrel (10) through the clamping assembly. Then, use a ruler to test the core sample. After the test, mark the core sample and store it. Finally, restore the testing device to its initial state.

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