Asphalt pavement paving thickness detection device and detection method thereof

Abstract

The invention discloses an asphalt pavement paving thickness detection device which comprises a thickness detection unit which comprises a core drilling sampling frame and a lifting plate located at the top end of the core drilling sampling frame; the discharging adjusting unit comprises a fixing lug and a threaded cylinder rotationally installed on the fixing lug, the lower end of the threaded cylinder downwards penetrates through the second transmission wheel and is inserted into the sampling drill cylinder, and through holes matched with the threaded cylinder are formed in the upper end wall of the second transmission wheel and the upper end wall of the sampling drill cylinder; the asphalt pavement paving thickness detection method comprises the following steps: S1, aligning the drill core sampling frame and the sampling drill cylinder to a to-be-detected area of an asphalt pavement according to detection requirements, simultaneously starting the first motor and the second motor, and driving the sampling drill cylinder to rotate downwards by the lifting plate. According to the invention, a worker does not need to knock the sampling drill cylinder with the help of a tool for unloading, and the defect that the sampling drill cylinder is eccentric due to frequent knocking, so that a relatively large error occurs in subsequent asphalt pavement paving thickness detection is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt pavement detection, and in particular to an asphalt pavement paving thickness detection device and a detection method thereof. Background Art

[0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid. Asphalt is a widely used pavement structure binder material in road engineering. It can be used in proportion with mineral materials of different compositions to build asphalt pavements of different structures. It is widely used in highways. For the paving of asphalt road pavements, the paving thickness of asphalt is a key indicator, which has a direct impact on the flatness and compaction of the road. The corresponding monitoring device needs to be used to detect the paving thickness of asphalt pavement.

[0003] At present, the method for detecting the paving thickness of asphalt pavement generally adopts the "core drilling method". In the prior art, the detection device for detecting the paving thickness of asphalt pavement using the core drilling method is actually used. After the sampling drill barrel drills the asphalt pavement sample core, during the resetting process of the sampling drill barrel, the asphalt pavement sample core adheres to the sampling drill barrel. After the detection device is shut down, the staff needs to knock the sampling drill barrel with the help of hammers or other tools to shake the sample core off, which is inconvenient to operate. In addition, the sampling method of frequently knocking the sampling drill barrel to unload the material can easily cause the sampling drill barrel to be eccentric, resulting in the tilt of the subsequent drilling sample core, which in turn leads to large errors in the subsequent detection results of the paving thickness of the asphalt pavement. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned existing asphalt pavement paving thickness detection device and detection method, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide an asphalt pavement paving thickness detection device and a detection method thereof, which are suitable for solving the problem that after the sampling is completed, the staff needs to use hammers or other tools to knock on the sampling drill tube to shake the sample core off, which can easily lead to large errors in the asphalt pavement paving thickness detection results.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: an asphalt pavement paving thickness detection device, comprising:

[0008] The thickness detection unit comprises a core drilling sampling frame and a lifting plate located at the top of the core drilling sampling frame, wherein the lower end of the lifting plate is rotatably connected to a sampling drill barrel via a second transmission wheel, and the thickness detection unit further comprises a core drilling driving assembly for driving the sampling drill barrel;

[0009] The unloading adjustment unit includes a fixed ear and a threaded barrel rotatably mounted on the fixed ear, the lower end of the threaded barrel downwardly passes through the second transmission wheel and is inserted into the sampling drill barrel, and the second transmission wheel and the upper end wall of the sampling drill barrel are provided with a through hole matching the threaded barrel, the lower end of the threaded barrel is threadedly connected with a screw rod, the lower end of the screw rod is fixedly connected to a push plate, and the lower side wall of the push plate is provided with a strip groove.

[0010] As a preferred solution of the asphalt pavement paving thickness detection device described in the present invention, the detection device also includes a liquid spray cooling unit, which includes two liquid storage cylinders symmetrically arranged on both sides of the sampling drill barrel, each of the liquid storage cylinders is fixedly connected to the lifting plate through a connecting arm, a corresponding extrusion cylinder is fixedly arranged at the lower end of the liquid storage cylinder, the liquid storage cylinder and the extrusion cylinder are connected through a one-way liquid replenishing valve, the inner wall of the extrusion cylinder is sealingly and slidingly connected with a piston disk, the lower side wall of the piston disk is fixedly connected with a clamping disk through an extrusion rod, a return spring is sleeved on the extrusion rod, the return spring is located between the upper side wall of the clamping disk and the lower side wall of the extrusion cylinder, and the upper part of the inner cavity of the extrusion cylinder is fixedly connected with a spray plate through a liquid infusion tube.

[0011] As a preferred solution of the asphalt pavement paving thickness detection device described in the present invention, an observation window is embedded in the side wall of the liquid storage cylinder, and a spare water pump connected to the infusion pipe is fixedly installed on the lower side wall of the liquid storage cylinder.

[0012] As a preferred solution of the asphalt pavement paving thickness detection device described in the present invention, wherein: an arc-shaped pad is fixedly connected to the inner wall of the upper end of the extrusion cylinder, and a wear-resistant pad is provided on the fixed pad of the lower side wall of the clamping plate.

[0013] As a preferred solution of the asphalt pavement paving thickness detection device described in the present invention, a ferrule is fixedly connected between the two liquid storage cylinders, and the ferrule is located outside the sampling drill tube.

[0014] As a preferred solution of the asphalt pavement paving thickness detection device described in the present invention, wherein: the core drilling drive assembly includes two support rods fixedly installed on the upper side walls of the core drilling sampling frame and a top plate fixedly installed on the top ends of the two support rods, a first motor is fixedly installed at the center of the upper side wall of the top plate, the output shaft of the first motor passes through the top plate and is fixedly connected to a threaded rod, the threaded rod passes through the lifting plate and is threadedly connected to the lifting plate, and the lifting plate sliding sleeve is arranged on the two support rods, and a second motor is also fixedly installed on the upper side wall of the lifting plate, the output shaft of the second motor passes through the lifting plate fixed sleeve and is provided with a first transmission wheel, and the first transmission wheel and the second transmission wheel are connected by a transmission belt.

[0015] As a preferred solution of the asphalt pavement paving thickness detection device described in the present invention, corresponding reinforcing arms are provided at both ends of the upper side walls of the core drilling sampling frame and the top plate, and the reinforcing arms are fastened to the core drilling sampling frame and the top plate by fastening bolts.

[0016] As a preferred solution of the asphalt pavement paving thickness detection device described in the present invention, the core drilling sampling frame is arranged in a U shape, and a pull handle is fixedly connected to the front end of the upper side wall of the core drilling sampling frame.

[0017] As a preferred solution of the asphalt pavement paving thickness detection device described in the present invention, the diameter of the push plate is one-half to two-thirds of the inner diameter of the sampling drill tube, and the push plate is made of austenitic stainless steel.

[0018] A method for detecting the paving thickness of an asphalt pavement, the method is applicable to any of the above detection devices, and the method comprises the following steps:

[0019] S1: According to the detection requirements, the core sampling frame and the sampling drill barrel are aligned with the asphalt pavement to be detected area, and the first motor and the second motor are started at the same time, and the lifting plate drives the sampling drill barrel to rotate downward;

[0020] S2: The extrusion rod drives the pressing plate to press against the asphalt road surface, and the piston plate pushes the cooling fluid in the extrusion cylinder into the liquid delivery pipe, and sprays and cools the sampling drill cylinder through the spray plate;

[0021] S3: After drilling is completed, the sampling drill tube is controlled to reset upwards. As the drilled asphalt pavement sample core moves upward with the sampling drill tube, a push plate at a fixed height inside the sampling drill tube automatically unloads the asphalt pavement sample core without the need for manual unloading by staff.

[0022] The beneficial effects of the present invention are as follows: the sampling drill barrel is aligned with the asphalt pavement to be inspected area, and the first motor and the second motor are started at the same time, the lifting plate drives the sampling drill barrel to rotate downward, and the liquid storage cylinder fixedly connected to the lifting plate drives the pressing plate to move downward, and when the pressing plate and the asphalt pavement are pressed against each other to complete the pre-positioning of the drill core, the extrusion rod drives the cooling fluid in the extrusion barrel into the liquid infusion pipe through the piston plate, and the sampling drill barrel is sprayed and cooled through the spray plate, without the need for manual control by the staff, which simplifies the operation and avoids the waste of cooling fluid;

[0023] After the core sampling is completed, the first motor and the second motor output shaft are controlled to reverse. As the drilled asphalt pavement sample core follows the sampling drill barrel to move upward, the push plate located at a fixed height in the sampling drill barrel automatically unloads the asphalt pavement sample core, and the material is unloaded synchronously during the resetting process. There is no need for the staff to use tools to knock on the sampling drill barrel to unload the material, and the defect of frequent knocking on the sampling drill barrel causing it to be eccentric, which in turn leads to large errors in the subsequent asphalt pavement paving thickness detection, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative work. Among them:

[0025] Figure 1 This is a schematic diagram of the overall structure of an asphalt pavement paving thickness detection device proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of a core drilling drive assembly of an asphalt pavement paving thickness detection device proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the coordinated structure of a core sampling frame, a reinforcing arm and a sampling drill tube of an asphalt pavement paving thickness detection device proposed by the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of a discharge adjustment unit of an asphalt pavement paving thickness detection device proposed by the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of a liquid spray cooling unit of an asphalt pavement paving thickness detection device proposed by the present invention;

[0030] Figure 6 This is a schematic cross-sectional structure diagram of a liquid storage cylinder and an extrusion cylinder of an asphalt pavement paving thickness detection device proposed by the present invention;

[0031] Figure 7This is a schematic diagram of the matching structure of the wear-resistant pad and the abutment disc of the asphalt pavement paving thickness detection device proposed by the present invention;

[0032] Figure 8 This is a schematic diagram of the steps of a method for detecting asphalt pavement paving thickness proposed by the present invention.

[0033] Description of the drawings: 100 thickness detection unit, 101 core drilling sampling frame, 102 lifting plate, 103 second transmission wheel, 104 sampling drill tube, 105 core drilling drive assembly, 105a support rod, 105b top plate, 105c first motor, 105d threaded rod, 105e second motor, 105f first transmission wheel, 106 reinforcement arm, 107 fastening bolt, 200 unloading adjustment unit, 201 fixing ear, 202 threaded tube, 203 threaded rod, 204 push plate, 300 spray cooling unit, 301 liquid storage tube, 302 connecting arm, 303 ring, 304 extrusion tube, 305 one-way liquid replenishing valve, 306 piston disk, 307 extrusion rod, 308 tightening disk, 309 reset spring, 310 infusion tube, 311 spare water pump, 312 spray plate, 313 arc-shaped pad, 314 observation window, 315 wear-resistant pad. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0038] Embodiment 1

[0039] Reference Figure 1-Figure 8, which is an embodiment of the present invention, provides an asphalt pavement paving thickness detection device, including: a thickness detection unit 100, a discharge adjustment unit 200 and a liquid spray cooling unit 300.

[0040] Among them, the thickness detection unit 100 includes a core drilling sampling frame 101 and a lifting plate 102 located at the top of the core drilling sampling frame 101. The core drilling sampling frame 101 is arranged in a U shape, and a pull handle is fixedly connected to the front end of the upper side wall of the core drilling sampling frame 101. The lower end of the lifting plate 102 is rotatably connected to the sampling drill barrel 104 through the second transmission wheel 103. The thickness detection unit 100 also includes a core drilling drive assembly 105 for driving the sampling drill barrel 104.

[0041] Secondly, the core drilling drive assembly 105 includes two support rods 105a fixedly installed on the upper side wall of the core drilling sampling frame 101 and a top plate 105b fixedly installed on the top of the two support rods 105a. Corresponding reinforcing arms 106 are provided at both ends of the upper side walls of the core drilling sampling frame 101 and the top plate 105b. The reinforcing arms 106 are fastened to the core drilling sampling frame 101 and the top plate 105b by fastening bolts 107. The setting of the reinforcing arms 106 improves the connection stability of the top plate 105b and the core drilling sampling frame 101. The setting of the fastening bolts 107 facilitates the disassembly and replacement of the reinforcing arms 106. The center of the upper side wall of the top plate 105b is fixed A first motor 105c is fixedly installed. In the present invention, the first motor 105c and the second motor 105e are both forward and reverse servo motors. The output shaft of the first motor 105c passes through the top plate 105b and is fixedly connected to a threaded rod 105d. The threaded rod 105d passes through the lifting plate 102 and is threadedly connected to the lifting plate 102, and the lifting plate 102 is slidably sleeved on two support rods 105a. The second motor 105e is also fixedly installed on the upper side wall of the lifting plate 102. The output shaft of the second motor 105e passes through the lifting plate 102 and is fixedly sleeved with a first transmission wheel 105f. The first transmission wheel 105f and the second transmission wheel 103 are connected by a transmission belt.

[0042] Secondly, the unloading adjustment unit 200 includes a fixed ear 201 and a threaded barrel 202 rotatably mounted on the fixed ear 201, the lower end of the threaded barrel 202 downwardly penetrates the second transmission wheel 103 and is inserted into the sampling drill barrel 104, and the upper end wall of the second transmission wheel 103 and the sampling drill barrel 104 is provided with a through hole matching the threaded barrel 202, the lower end of the threaded barrel 202 is threadedly connected with a screw rod 203, the lower end of the screw rod 203 is fixedly connected to a push plate 204, the diameter of the push plate 204 is one-half to two-thirds of the inner diameter of the sampling drill barrel 104, and the push plate 204 is made of austenitic stainless steel. This arrangement ensures that the push plate 204 can stably unload the asphalt pavement sample core drilled in the sampling drill barrel 104, the push plate 204 made of austenitic stainless steel has strong corrosion resistance, can meet its own strength requirements, and extend the service life of the push plate 204, and the lower side wall of the push plate 204 is provided with a strip groove.

[0043] Finally, the liquid spray cooling unit 300 includes two liquid storage cylinders 301 symmetrically arranged on both sides of the sampling drill tube 104, and a ring 303 is fixedly connected between the two liquid storage cylinders 301. The ring 303 is located on the outside of the sampling drill tube 104. The setting of the ring 303 improves the connection strength of the two liquid storage cylinders 301. Each liquid storage cylinder 301 is fixedly connected to the lifting plate 102 through the connecting arm 302. An observation window 314 is inlaid on the side wall of the liquid storage cylinder 301. The setting of the observation window 314 is convenient for the staff to intuitively observe the remaining amount of coolant in the liquid storage cylinder 301 and replenish the coolant in time. A spare water pump 311 connected to the infusion pipe 310 is fixedly installed on the lower side wall of the liquid storage cylinder 301, and a corresponding extrusion cylinder 304 is fixedly arranged at the lower end of the liquid storage cylinder 301. The cylinder 304 is connected through a one-way refill valve 305. The one-way refill valve 305 is a control valve commonly used in liquid systems, especially in situations where the direction and flow rate of the liquid need to be accurately controlled. Its main function is to ensure that the liquid can only flow in one direction and automatically close in the opposite direction to prevent backflow. It belongs to a very mature prior art and its working principle is not introduced in detail here. The inner wall of the extrusion cylinder 304 is sealingly and slidably connected to a piston disk 306, and the lower side wall of the piston disk 306 is fixedly connected to a clamping disk 308 through an extrusion rod 307. A return spring 309 is sleeved on the extrusion rod 307. The return spring 309 is located between the upper side wall of the clamping disk 308 and the lower side wall of the extrusion cylinder 304. The upper part of the inner cavity of the extrusion cylinder 304 is fixedly connected to a spray plate 312 through an infusion tube 310.

[0044] A method for detecting the paving thickness of an asphalt pavement is applicable to any of the above detection devices, and the detection method comprises the following steps:

[0045] S1: According to the detection requirements, the core sampling frame 101 and the sampling drill tube 104 are aligned with the asphalt road surface to be detected, and the first motor 105c and the second motor 105e are started at the same time, and the lifting plate 102 drives the sampling drill tube 104 to rotate downward;

[0046] S2: The extrusion rod 307 drives the pressing plate 308 to press against the asphalt road surface, and the piston plate 306 pushes the cooling fluid in the extrusion cylinder 304 into the liquid delivery pipe 310, and sprays and cools the sampling drill cylinder 104 through the spray plate 312;

[0047] S3: After drilling is completed, the sampling drill tube 104 is controlled to reset upward. As the drilled asphalt pavement sample core moves upward with the sampling drill tube 104, the push plate 204 with a fixed height inside the sampling drill tube 104 automatically unloads the asphalt pavement sample core without manual unloading by the staff.

[0048] During use, according to the detection requirements, the core sampling frame 101 and the sampling drill tube 104 are aligned with the asphalt pavement to be detected area, the first motor 105c is controlled to drive the threaded rod 105d to rotate, and the lifting plate 102 threadedly connected thereto drives the sampling drill tube 104 to move downward, and the second motor 105e drives the sampling drill tube 104 to rotate through the first transmission wheel 105f and the second transmission wheel 103, and the liquid storage cylinder 301 fixedly connected to the lifting plate 102 drives the pressing plate 308 to move downward, and when the pressing plate 308 is pressed against the asphalt pavement to complete the pre-positioning of the core, the extrusion rod 307 drives the cooling fluid in the extrusion cylinder 304 into the infusion pipe 310 through the piston plate 306, and the sampling drill tube 104 is sprayed and cooled through the spray plate 312, without the need for manual control by the staff, which simplifies the operation and avoids the waste of cooling fluid;

[0049] After the core sampling is completed, the first motor 105c is controlled to reverse and the output shaft of the second motor 105e is controlled to reverse. When the drilled asphalt pavement sample core follows the sampling drill tube 104 to move upward, the push plate 204 with a fixed height in the sampling drill tube 104 automatically unloads the asphalt pavement sample core. The material is unloaded synchronously during the resetting process. The staff does not need to use tools to knock the sampling drill tube 104 to unload the material, and the defect of frequent knocking of the sampling drill tube 104 causing its eccentricity, which in turn causes a large error in the subsequent asphalt pavement paving thickness detection, is solved.

[0050] In addition, due to different road construction requirements and different asphalt pavement thicknesses, when it is necessary to adjust the distance between the push plate 204 and the lower end of the sampling drill tube 104, a tool is inserted into the strip groove to limit the push plate 204. At this time, the threaded tube 202 is rotated, and the screw rod 203 threadedly connected thereto can flexibly adjust the initial height difference between the push plate 204 and the lower end opening of the sampling drill tube 104.

[0051] Embodiment 2

[0052] Reference Figure 7 The difference from the first embodiment is that an arc-shaped pad 313 is fixedly connected to the inner wall of the upper end of the extrusion cylinder 304, and a wear-resistant pad 315 is provided on the fixed pad of the lower side wall of the clamping plate 308. The arc-shaped pad 313 can limit the maximum rising height of the piston plate 306 to prevent the piston plate 306 from directly overflowing the upper end of the infusion tube 310. The wear-resistant pad 315 improves the clamping effect between the clamping plate 308 and the asphalt pavement, thereby improving the stability of the sampling drill tube 104 in core sampling.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for detecting the thickness of asphalt pavement, characterized in that: include: A thickness detection unit (100) comprises a core drilling sampling frame (101) and a lifting plate (102) located at the top of the core drilling sampling frame (101); the lower end of the lifting plate (102) is rotatably connected to a sampling drill tube (104) via a second transmission wheel (103); the thickness detection unit (100) further comprises a core drilling drive assembly (105) for driving the sampling drill tube (104); The unloading adjustment unit (200) comprises a fixing ear (201) and a threaded barrel (202) rotatably mounted on the fixing ear (201); the lower end of the threaded barrel (202) passes downward through the second transmission wheel (103) and is inserted into the sampling drill tube (104); the upper end walls of the second transmission wheel (103) and the sampling drill tube (104) are provided with through holes matching the threaded barrel (202); the lower end of the threaded barrel (202) is threadedly connected with a screw rod (203); the lower end of the screw rod (203) is fixedly connected to a push plate (204); and the lower side wall of the push plate (204) is provided with a strip groove.

2. The asphalt pavement paving thickness detection device according to claim 1, characterized in that: The detection device further comprises a liquid spray cooling unit (300), which comprises two liquid storage cylinders (301) symmetrically arranged on both sides of the sampling drill tube (104), each of the liquid storage cylinders (301) is fixedly connected to the lifting plate (102) via a connecting arm (302), a corresponding extrusion cylinder (304) is fixedly arranged at the lower end of the liquid storage cylinder (301), the liquid storage cylinder (301) is connected to the extrusion cylinder (304) via a one-way liquid replenishing valve (305), and the extrusion cylinder (304) is connected to the liquid storage cylinder (301). 04) The inner wall is sealingly and slidably connected to a piston disk (306), and the lower side wall of the piston disk (306) is fixedly connected to a clamping disk (308) via an extrusion rod (307). A return spring (309) is sleeved on the extrusion rod (307), and the return spring (309) is located between the upper side wall of the clamping disk (308) and the lower side wall of the extrusion cylinder (304). The upper part of the inner cavity of the extrusion cylinder (304) is fixedly connected to a spray plate (312) via an infusion tube (310).

3. The asphalt pavement paving thickness detection device according to claim 2, characterized in that: An observation window (314) is inlaid on the side wall of the liquid storage cylinder (301), and a standby water pump (311) connected to the liquid infusion tube (310) is fixedly installed on the lower side wall of the liquid storage cylinder (301).

4. The asphalt pavement paving thickness detection device according to claim 2, characterized in that: An arc-shaped pad (313) is fixedly connected to the inner wall of the upper end of the extrusion cylinder (304), and a wear-resistant pad (315) is fixedly provided on the lower side wall of the tightening plate (308).

5. The asphalt pavement paving thickness detection device according to claim 2, characterized in that: A ferrule (303) is also fixedly connected between the two liquid storage cylinders (301), and the ferrule (303) is located outside the sampling drill tube (104).

6. The asphalt pavement paving thickness detection device according to claim 1, characterized in that: The core drilling drive assembly (105) comprises two support rods (105a) fixedly mounted on the upper side wall of the core drilling sampling frame (101) and a top plate (105b) fixedly mounted on the top ends of the two support rods (105a); a first motor (105c) is fixedly mounted at the center of the upper side wall of the top plate (105b); an output shaft of the first motor (105c) passes through the top plate (105b) and is fixedly connected to a threaded rod (105d); the threaded rod (105d) passes through the lifting plate (102) and is threadedly connected to the lifting plate (102); the lifting plate (102) is slidably sleeved on the two support rods (105a); a second motor (105e) is also fixedly mounted on the upper side wall of the lifting plate (102); an output shaft of the second motor (105e) passes through the lifting plate (102) and is fixedly sleeved with a first transmission wheel (105f); the first transmission wheel (105f) and the second transmission wheel (103) are connected by a transmission belt.

7. The asphalt pavement paving thickness detection device according to claim 6, characterized in that: The core sampling frame (101) and the upper side wall of the top plate (105b) are both provided with corresponding reinforcing arms (106), and the reinforcing arms (106) are fastened to the core sampling frame (101) and the top plate (105b) via fastening bolts (107).

8. The asphalt pavement paving thickness detection device according to claim 1, characterized in that: The core drilling sampling frame (101) is configured to be U-shaped, and a pull handle is fixedly connected to the front end of the upper side wall of the core drilling sampling frame (101).

9. The asphalt pavement paving thickness detection device according to claim 1, characterized in that: The diameter of the push plate (204) is one-half to two-thirds of the inner diameter of the sampling drill tube (104), and the push plate (204) is made of austenitic stainless steel.

10. A method for detecting asphalt pavement paving thickness, the method being applicable to any one of the detection devices in claims 1-9 above, characterized in that: And the detection method comprises the following steps: S1: according to the detection requirements, the core sampling frame (101) and the sampling drill tube (104) are aligned with the asphalt road surface to be detected, and the first motor (105c) and the second motor (105e) are started at the same time, and the lifting plate (102) drives the sampling drill tube (104) to rotate downward; S2: The extrusion rod (307) drives the pressing plate (308) to press against the asphalt road surface, and the piston plate (306) presses the cooling fluid in the extrusion cylinder (304) into the liquid delivery pipe (310), and sprays and cools the sampling drill cylinder (104) through the spray plate (312); S3: After drilling is completed, the sampling drill tube (104) is controlled to reset upwards. As the drilled asphalt pavement sample core moves upward with the sampling drill tube (104), a push plate (204) at a fixed height inside the sampling drill tube (104) automatically unloads the asphalt pavement sample core without the need for manual unloading by staff.

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