Device and method for testing internal temperature field of asphalt pavement structure

Abstract

The invention discloses an asphalt pavement structure internal temperature field testing device and method, and belongs to the field of asphalt pavement detection. The invention relates to an asphalt pavement structure internal temperature field testing device and method, the asphalt pavement structure internal temperature field testing device comprises a containing shell pre-buried in an asphalt pavement and a device body located above the asphalt pavement, a temperature sensor is arranged in the containing shell, the temperature sensor is connected with a data acquisition instrument through a wire, the data acquisition instrument is located at one side of the asphalt pavement, and the data acquisition instrument is connected with a temperature sensor through a wire. A sliding plate is slidably connected into the containing shell, and a plurality of through holes are formed in the top of the sliding plate. According to the device, the temperature sensor is pre-buried in the asphalt pavement, after the construction of the asphalt pavement is completed, a hole is drilled above the accommodating shell, the feeding pipe is inserted into the accommodating shell to adjust the height of the temperature sensor, and then asphalt is conveyed into the accommodating shell through the feeding pipe, so that the device can ensure that the depth of the temperature sensor is correct, and the testing precision is improved; and the small holes are only drilled in the asphalt pavement, so that the damage degree to the asphalt pavement is small.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt pavement detection, and in particular to a device and method for testing the internal temperature field of an asphalt pavement structure. Background Art

[0002] Asphalt concrete pavement is currently the main structural form used in my country's high-grade roads. Asphalt is a temperature-sensitive material, and the road performance of asphalt concrete pavement is greatly affected by temperature. Therefore, the test of the temperature field of asphalt concrete pavement is one of the research contents of asphalt pavement research.

[0003] After searching, the Chinese patent authorization number CN211262531U discloses a temperature field test device for an in-service asphalt pavement, including a frame, a hollow cylinder, the inside of the cylinder cross section is circular, the outside is square, and a side wall of the cylinder is provided with a plurality of vertically arranged through holes; a temperature sensor is perpendicular to the cylinder, one end enters the inside of the cylinder through the through hole, and the other end is located on the outside of the cylinder. It also includes a data acquisition instrument, which is located on the outside of the cylinder. The data acquisition instrument is connected to the temperature sensor through a wire, and the wire enters the cylinder from the top of the cylinder and is connected to the temperature sensor. There is no need to pre-embed the temperature sensor, nor to drill the core for sampling, and then place the temperature sensor to measure the temperature. The measurement method is simple and easy.

[0004] In order to place the pillars, this patent requires cutting on the road surface, and the cutting area is large, so this method still causes great damage to the asphalt pavement. The traditional method of pre-embedded temperature sensors when paving asphalt pavement will cause the temperature sensor to change in height during the asphalt flattening process, which cannot meet the needs of temperature testing at a specific depth of the asphalt pavement, thereby reducing the accuracy of the internal temperature field test of the asphalt pavement.

[0005] Therefore, we made improvements to this and proposed a device and method for testing the internal temperature field of asphalt pavement structure. Summary of the invention

[0006] The purpose of the present invention is to solve the problem of greater damage to asphalt pavement or low accuracy in testing the internal temperature field of asphalt pavement in the prior art, and to propose a device and method for testing the internal temperature field of asphalt pavement structure.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A device for testing the internal temperature field of an asphalt pavement structure, comprising a housing pre-buried in the asphalt pavement and a device body located above the asphalt pavement, wherein a temperature sensor is arranged in the housing, and the temperature sensor is connected to a data acquisition instrument through a wire, and the data acquisition instrument is located at one side of the asphalt pavement, wherein a slide plate is slidably connected in the housing, and a plurality of through holes are opened on the top of the slide plate, wherein the temperature sensor is located below the slide plate, and a magnetic plate is arranged above the slide plate;

[0009] The device body includes an H-shaped bottom plate, a column is fixedly connected to the top of the bottom plate, a top plate is rotatably connected to the top of the column, a support plate is rotatably connected to the lower half of the outer periphery of the column, two side plates are fixedly connected between the top plate and the support plate, a fixing portion is provided on one side of the support plate, and a drilling portion and an adjustment portion are respectively provided on the bottom of the top plate at opposite sides of the column.

[0010] As a preferred technical solution of the present application, the adjusting part includes two electric push rods fixedly connected to the bottom of the top plate, and the output ends of the two electric push rods are commonly fixedly connected to a moving plate. A feeding pipe with a top opening is fixedly penetrated on the top of the moving plate, and the feeding pipe slides through the support plate. A scale line is provided on the lower half of the outer wall of the feeding pipe, and a top pipe is fixedly penetrated on the bottom of the top plate. The lower half of the top pipe is slidably inserted into the feeding pipe, an asphalt pump is fixedly connected to the top of the top plate, and the output end of the asphalt pump is communicated with the top pipe. A number of discharge ports are provided on the lower half of the side wall of the feeding pipe, and a magnetic suction part is provided on the bottom of the feeding pipe.

[0011] As a preferred technical solution of the present application, the magnetic attraction part includes a bottom groove opened at the bottom of the feeding tube, and a plurality of electromagnets are fixedly connected to the top wall of the bottom groove. The bottom surface of the electromagnet is coplanar with the bottom surface of the feeding tube, and a battery is installed on the top of the moving plate, and the electromagnet is electrically connected to the battery.

[0012] As a preferred technical solution of the present application, a ball is movably connected inside the skateboard, a counterweight is fixedly connected to the lower half of the outer wall of the ball, and the temperature sensor is fixedly connected to the lower half of the outer wall of the ball, the upper half of the outer wall of the ball is fixedly connected to a placement plate through a plurality of support rods, the magnetic plate is fixedly connected to the top of the placement plate, and two limit strips are fixedly connected to the lower half of the inner wall of the accommodating shell, and the bottom surface of the skateboard is in contact with the limit strips.

[0013] As a preferred technical solution of the present application, a fixed shell is fixedly connected to the bottom of the top plate, a piston is slidably connected inside the fixed shell, a sliding bar is fixedly connected to the bottom of the piston, the sliding bar slides through the bottom wall inside the fixed shell, and the bottom surface of the sliding bar is fixedly connected to the moving plate, a hose is fixedly penetrated through the lower half of the side wall of the fixed shell, a nozzle is fixedly connected to the top wall inside the bottom groove, and the hose is fixedly penetrated through the feeding pipe and communicated with the nozzle.

[0014] As a preferred technical solution of the present application, a camera and a lighting lamp are fixedly connected to the top wall of the bottom groove, a display screen is fixedly connected to the top of the top plate, and the camera, lighting lamp and display screen are all electrically connected to the battery.

[0015] As a preferred technical solution of the present application, the fixing portion is a bolt that slides through the support plate and the column, and the support plate and the column are fixedly connected by the bolts.

[0016] As a preferred technical solution of the present application, a one-way valve is installed at the bottom of the fixed shell.

[0017] As a preferred technical solution of the present application, a plurality of limiting rods are fixedly connected to the bottom of the accommodating shell.

[0018] A method for testing the internal temperature field of an asphalt pavement structure, comprising the above-mentioned device for testing the internal temperature field of an asphalt pavement structure, comprises the following steps:

[0019] S1. When paving asphalt roads, bury the containment shell in the asphalt, and make the height of the temperature sensor slightly lower than the height required for the test;

[0020] S2. After the asphalt road is flattened and dried, the staff transports the device body to the pre-buried position of the containment shell, and starts the drilling unit to drill holes, and the drill bit penetrates the containment shell;

[0021] S3, then the drill bit is lifted and the top plate is rotated so that the adjustment part is located directly above the asphalt road opening;

[0022] S4, the electric push rod works, driving the feeding tube to be inserted into the containing shell until the electromagnet contacts the magnetic plate, and the electromagnet is started to work, so that the electromagnet adsorbs the magnetic plate;

[0023] S5. The electric push rod contracts, driving the magnetic plate, the slide plate and the temperature sensor to move upward. The depth of the feeding pipe inserted into the asphalt road is observed through the scale line. When the depth of the feeding pipe inserted into the asphalt road plus the fixed distance between the magnetic plate and the temperature sensor is equal to the depth of the temperature sensor required for the experiment, the electric push rod stops.

[0024] S6, the asphalt pump works to transport asphalt into the feeding pipe, the asphalt enters the containing shell through the discharge port, and moves through the through hole to the temperature sensor, so that the containing shell is filled with asphalt;

[0025] S7, the electromagnet is powered off, and the electric push rod continues to contract, causing the feeding tube to move upward and leave the asphalt pavement, waiting for the asphalt in the container to dry, and then the internal temperature of the asphalt pavement can be tested by reading the data acquisition instrument.

[0026] Compared with the prior art, the present invention provides a device and method for testing the internal temperature field of an asphalt pavement structure, which has the following beneficial effects:

[0027] 1. The internal temperature field testing device of the asphalt pavement structure pre-buries the temperature sensor in the asphalt pavement. After the asphalt pavement construction is completed, a hole is drilled above the containment shell, and a feeding pipe is inserted into the containment shell to adjust the height of the temperature sensor. Then, asphalt is fed into the containment shell through the feeding pipe. After the asphalt solidifies, the temperature monitoring can be performed. Therefore, the device can ensure the correct depth of the temperature sensor and improve the test accuracy. In addition, only a small hole is drilled on the asphalt pavement, which has a small degree of damage to the asphalt pavement, thereby solving the problem of large damage to the asphalt pavement or low test accuracy of the internal temperature field of the asphalt pavement in the prior art.

[0028] 2. The internal temperature field testing device of the asphalt pavement structure is equipped with a fixed shell, a piston, a hose and a nozzle. When the feeding pipe moves downward, the gas in the fixed shell is sprayed to the top surface of the magnetic plate through the nozzle, and the debris on the top of the magnetic plate is blown away, thereby ensuring that the electromagnet can fully fit with the top surface of the magnetic plate, thereby improving the connection strength between the electromagnet and the magnetic plate, and ensuring that the magnetic plate can rise with the electromagnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a left-side structural schematic diagram of the present invention;

[0030] Figure 2 It is a right view structural schematic diagram of the present invention;

[0031] Figure 3 It is a partial structural schematic diagram of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the feeding pipe in the present invention;

[0033] Figure 5 It is a schematic cross-sectional structure diagram of the lower half of the feeding pipe in the present invention;

[0034] Figure 6 It is a schematic diagram of the internal structure of the containing shell in the present invention.

[0035] In the figure:

[0036] 1. Containing shell; 2. Device body; 21. Bottom plate; 22. Column; 23. Top plate; 24. Support plate; 25. Side plate; 26. Fixing part; 27. Drilling part; 28. Adjusting part; 281. Electric push rod; 282. Moving plate; 283. Feeding pipe; 284. Scale line; 285. Top pipe; 286. Asphalt pump; 287. Discharge port; 288. Magnetic part; 2881. Bottom groove; 2882. Electromagnet; 2883. Battery; 3. Temperature sensor; 4. Slide plate; 5. Through hole; 6. Magnetic plate; 7. Ball; 8. Counterweight; 9. Placement plate; 10. Limiting strip; 11. Fixed shell; 12. Piston; 13. Sliding strip; 14. Hose; 15. Sprinkler; 16. Camera; 17. Lighting lamp; 18. Display screen; 19. One-way valve; 20. Limiting rod. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0038] Example:

[0039] Reference Figure 1-6 A device for testing the internal temperature field of an asphalt pavement structure includes a containment shell 1 pre-buried in the asphalt pavement and a device body 2 located above the asphalt pavement. A temperature sensor 3 is arranged in the containment shell 1. The temperature sensor 3 is connected to a data acquisition instrument through a wire. The data acquisition instrument is located on one side of the asphalt pavement. The wire is fixed through the lower half of the containment shell 1 and is covered by asphalt. The data acquisition instrument is located outside the asphalt pavement. The temperature data at the temperature sensor 3 can be collected through the data acquisition instrument.

[0040] The containment shell 1 is made of copper material, which has good thermal conductivity. The thickness of the inner wall of the containment shell 1 needs to meet the requirement that it will not be deformed when the asphalt pavement is leveled. The containment shell 1 is made of copper material. After the asphalt pavement is leveled, the position of the containment shell 1 can be accurately determined by a metal detector. A slide plate 4 is slidably connected to the containment shell 1, and a plurality of through holes 5 are opened on the top of the slide plate 4. The temperature sensor 3 is located below the slide plate 4, and a magnetic plate 6 is arranged above the slide plate 4.

[0041] The device body 2 includes an H-shaped bottom plate 21, a column 22 is fixedly connected to the top of the bottom plate 21, a top plate 23 is rotatably connected to the top of the column 22, a support plate 24 is rotatably connected to the lower half of the outer periphery of the column 22, two side plates 25 are fixedly connected between the top plate 23 and the support plate 24, a fixing portion 26 is provided on one side of the support plate 24, and a drilling portion 27 and an adjustment portion 28 are respectively provided on the bottom of the top plate 23 at opposite sides of the column 22.

[0042] The fixing portion 26 is a bolt that slides through the support plate 24 and the column 22. The support plate 24 and the column 22 are fixedly connected by bolts. After the bolts are removed, the top plate 23 is rotated to drive the side plate 25 and the support plate 24 to rotate. When the support plate 24 rotates half a circle, the bolts are inserted into the support plate 24 and the column 22 to be fixed, so that the top plate 23 is fixed to prevent the top plate 23 from shaking during drilling, and the drilling portion 27 and the adjustment portion 28 can be replaced.

[0043] The drilling part 27 is a prior art, which drills the asphalt road by rotating the drill bit while moving downward. In this device, the drill bit passes through the upper half of the asphalt road and the upper half of the containing shell 1 to facilitate adding asphalt into the containing shell 1.

[0044] like Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a ball 7 is movably connected inside the skateboard 4, and the ball 7 can roll relative to the skateboard 4. A counterweight 8 is fixedly connected to the lower half of the outer wall of the ball 7, and the temperature sensor 3 is fixedly connected to the lower half of the outer wall of the ball 7. The upper half of the outer wall of the ball 7 is fixedly connected to a placement plate 9 through a plurality of support rods, the magnetic plate 6 is fixedly connected to the top of the placement plate 9, and two limit strips 10 are fixedly connected to the lower half of the inner wall of the accommodating shell 1, and the bottom surface of the skateboard 4 is in contact with the limit strips 10.

[0045] The weight of the counterweight 8 is relatively large, so even if the housing 1 is tilted, the counterweight 8 will pull the ball 7 to roll relative to the slide plate 4, so that the placement plate 9 and the magnetic plate 6 always remain horizontal, and the height difference between the temperature sensor 3 and the magnetic plate 6 is L.

[0046] A plurality of limit rods 20 are fixedly connected to the bottom of the containment shell 1. When the containment shell 1 is pre-buried, the limit rods 20 are vertically inserted into the asphalt, thereby improving the anti-tilting ability of the containment shell 1 and preventing the containment shell 1 from tilting too much during the asphalt road flattening process.

[0047] like Figure 1-3As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the adjusting part 28 includes two electric push rods 281 fixedly connected to the bottom of the top plate 23, the output ends of the two electric push rods 281 are commonly fixedly connected to a moving plate 282, a feeding pipe 283 with a top opening is fixedly penetrated on the top of the moving plate 282, the feeding pipe 283 slides through the support plate 24, and a scale line 284 is provided on the lower half of the outer wall of the feeding pipe 283, a top pipe 285 is fixedly penetrated on the bottom of the top plate 23, and the lower half of the top pipe 285 is slidably inserted into the feeding pipe 283, an asphalt pump 286 is fixedly connected to the top of the top plate 23, the output end of the asphalt pump 286 is communicated with the top pipe 285, and the input end of the asphalt pump 286 is communicated with a container for storing asphalt through a pipeline, a plurality of discharge ports 287 are provided on the lower half of the side wall of the feeding pipe 283, and a magnetic suction part 288 is provided on the bottom of the feeding pipe 283.

[0048] The magnetic attraction part 288 includes a bottom groove 2881 opened at the bottom of the feeding tube 283, and a plurality of electromagnets 2882 are fixedly connected to the top wall of the bottom groove 2881. The bottom surface of the electromagnet 2882 is coplanar with the bottom surface of the feeding tube 283. A battery 2883 is installed on the top of the moving plate 282, and the electromagnet 2882 is electrically connected to the battery 2883.

[0049] After the drilling part 27 is completed, the staff removes the bolts, then rotates the top plate 23 half a circle, and then installs the bolts, so that the feed pipe 283 moves to the top of the asphalt road opening, and then starts the electric push rod 281 to drive the feed pipe 283 to be inserted into the asphalt road and the containing shell 1 until the electromagnet 2882 contacts the magnetic plate 6, and then the electromagnet 2882 is energized to generate magnetic force to attract the magnetic plate 6, and then the electric push rod 281 contracts, driving the feed pipe 283, the electromagnet 2882, the magnetic plate 6, the slide plate 4 and the temperature sensor 3 to move upward. When the depth of the feed pipe 283 inserted into the asphalt road plus L is equal to the depth where the temperature sensor 3 is required, the electric push rod 281 is closed, and the depth of the feed pipe 283 inserted into the asphalt road can be directly observed through the scale line 284.

[0050] Start the asphalt pump 286 to transport asphalt toward the top pipe 285 and the feed pipe 283. The asphalt enters the containment shell 1 through the discharge port 287 and enters under the slide plate 4 through the through hole 5, so that the containment shell 1 below the feed pipe 283 is filled with asphalt, the slide plate 4 will no longer move, and the ball 7 will no longer rotate. Then the electromagnet 2882 is powered off, the electric push rod 281 contracts, and drives the feed pipe 283 to move upward. The upper half of the containment shell 1 is also filled with asphalt. After the feed pipe 283 is completely detached from the asphalt pavement, the staff can manually add asphalt to ensure that the road is completely repaired.

[0051] like Figure 3-5As shown, as a preferred embodiment, on the basis of the above method, further, the bottom of the top plate 23 is fixedly connected to a fixed shell 11, a piston 12 is slidably connected in the fixed shell 11, a sliding bar 13 is fixedly connected to the bottom of the piston 12, the sliding bar 13 slides through the inner bottom wall of the fixed shell 11, and the bottom surface of the sliding bar 13 is fixedly connected to the moving plate 282, a hose 14 is fixedly penetrated through the lower half of the side wall of the fixed shell 11, a nozzle 15 is fixedly connected to the top wall of the bottom groove 2881, the hose 14 is fixedly penetrated through the feeding pipe 283 and communicated with the nozzle 15, and a one-way valve 19 is installed at the bottom of the fixed shell 11.

[0052] When the feed pipe 283 moves downward, it drives the piston 12 to move downward. The airflow below the piston 12 enters the nozzle 15 through the hose 14, and passes through the nozzle 15 to spray toward the magnetic plate 6, blowing away the debris on the top of the magnetic plate 6, thereby ensuring that the electromagnet 2882 can fully fit with the top surface of the magnetic plate 6.

[0053] The one-way valve 19 can only allow external airflow to enter the fixed housing 11 through the one-way valve 19 . When the piston 12 moves upward, the external airflow enters the fixed housing 11 through the one-way valve 19 .

[0054] like Figure 1 and Figure 5 As shown, as a preferred embodiment, on the basis of the above method, further, the top wall of the bottom groove 2881 is fixedly connected with a camera 16 and a lighting lamp 17, and the top of the top plate 23 is fixedly connected with a display screen 18, and the camera 16, the lighting lamp 17, and the display screen 18 are all electrically connected to the battery 2883.

[0055] When the feeding tube 283 moves downward, the lighting lamp 17, the camera 16 and the display screen 18 are started, so that the staff can observe whether the electromagnet 2882 is in contact with the magnetic plate 6 through the display screen 18, which facilitates the operation of the staff.

[0056] Embodiment 2:

[0057] This embodiment provides a method for testing the internal temperature field of an asphalt pavement structure, comprising the following steps:

[0058] S1. When paving an asphalt road, insert the limit rod 20 vertically into the asphalt, and make the height of the temperature sensor 3 slightly lower than the height required for the test. The wire passes through the asphalt horizontally and extends to one side of the asphalt road, and then covers the asphalt. The containment shell 1 is pre-buried in the asphalt road, and the end of the wire away from the temperature sensor 3 is connected to the data acquisition instrument;

[0059] S2. After the asphalt road is flattened and dried, the staff transports the device body 2 to the pre-buried position of the containment shell 1 and starts the drilling part 27 to drill holes, and the drill bit penetrates the upper half of the asphalt road and the top wall of the containment shell 1;

[0060] When the containment shell 1 is pre-buried, the position of the containment shell 1 can be marked, and the containment shell 1 is made of copper material. After the asphalt road surface is paved, the position of the containment shell 1 can be accurately determined by a metal detector;

[0061] S3, then the drill bit is lifted, the staff removes the bolts, then rotates the top plate 23 half a circle, and then installs the bolts, so that the feed pipe 283 moves to the position just above the asphalt road opening;

[0062] S4, then start the electric push rod 281, drive the feeding tube 283 to insert into the asphalt road and the containing shell 1, until the electromagnet 2882 contacts the magnetic plate 6, and then the electromagnet 2882 is energized to generate magnetic force to attract the magnetic plate 6;

[0063] When the feeding pipe 283 moves downward, the piston 12 is driven to move downward, and the airflow below the piston 12 enters the nozzle 15 through the hose 14, and passes through the nozzle 15 to spray toward the magnetic plate 6, blowing away the debris on the top of the magnetic plate 6, thereby ensuring that the electromagnet 2882 can fully fit the top surface of the magnetic plate 6;

[0064] When the feeding tube 283 moves downward, the lighting lamp 17, the camera 16 and the display screen 18 are started, so that the staff can observe whether the electromagnet 2882 is in contact with the magnetic plate 6 through the display screen 18, which facilitates the staff's operation;

[0065] S5, the electric push rod 281 contracts, driving the feeding tube 283, the electromagnet 2882, the magnetic plate 6, the slide plate 4 and the temperature sensor 3 to move upward. When the depth of the feeding tube 283 inserted into the asphalt road plus L (the height difference between the temperature sensor 3 and the magnetic plate 6) is equal to the depth where the temperature sensor 3 is required to be located, the electric push rod 281 is closed;

[0066] The depth of the feed pipe 283 inserted into the asphalt road can be directly observed through the scale line 284;

[0067] S6, start the asphalt pump 286 to transport asphalt toward the top pipe 285 and the feeding pipe 283, the asphalt enters the containing shell 1 through the discharge port 287, and enters below the slide plate 4 through the through hole 5, so that the containing shell 1 below the feeding pipe 283 is filled with asphalt, the slide plate 4 will not move anymore, and the ball bearing 7 will not rotate anymore;

[0068] S7. Then the electromagnet 2882 is powered off, the electric push rod 281 contracts, and the feeding tube 283 moves upward. The upper half of the housing 1 is also filled with asphalt. After the feeding tube 283 is completely separated from the asphalt pavement, the staff can manually add asphalt to ensure that the road is completely repaired. After waiting for the added asphalt to dry, the internal temperature of the asphalt pavement can be tested by reading the data acquisition instrument.

[0069] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for testing the internal temperature field of an asphalt pavement structure, comprising a housing (1) pre-buried in the asphalt pavement and a device body (2) located above the asphalt pavement, wherein a temperature sensor (3) is arranged in the housing (1), and the temperature sensor (3) is connected to a data acquisition device via a wire, and the data acquisition device is located at one side of the asphalt pavement, characterized in that: A slide plate (4) is slidably connected inside the housing (1), a plurality of through holes (5) are provided on the top of the slide plate (4), a temperature sensor (3) is located below the slide plate (4), and a magnetic plate (6) is provided above the slide plate (4); The device body (2) comprises an H-shaped bottom plate (21), the top of the bottom plate (21) is fixedly connected to a column (22), the top of the column (22) is rotatably connected to a top plate (23), the lower half of the outer peripheral side of the column (22) is rotatably connected to a support plate (24), two side plates (25) are fixedly connected between the top plate (23) and the support plate (24), one side of the support plate (24) is provided with a fixing portion (26), and the bottom of the top plate (23) is respectively provided with a drilling portion (27) and an adjustment portion (28) at two opposite sides of the column (22).

2. The internal temperature field testing device of an asphalt pavement structure according to claim 1 is characterized in that: The adjusting portion (28) comprises two electric push rods (281) fixedly connected to the bottom of the top plate (23); the output ends of the two electric push rods (281) are fixedly connected to a moving plate (282); a feeding pipe (283) with a top opening is fixedly penetrated through the top of the moving plate (282); the feeding pipe (283) slides through the supporting plate (24); a scale mark (284) is provided on the lower half of the outer wall of the feeding pipe (283); A top pipe (285) is fixedly provided at the bottom of the plate (23), and the lower half of the top pipe (285) is slidably inserted into the feeding pipe (283). An asphalt pump (286) is fixedly connected to the top of the top plate (23), and the output end of the asphalt pump (286) is communicated with the top pipe (285). A plurality of discharge ports (287) are provided at the lower half of the side wall of the feeding pipe (283), and a magnetic attraction portion (288) is provided at the bottom of the feeding pipe (283).

3. The internal temperature field testing device of an asphalt pavement structure according to claim 2 is characterized in that: The magnetic attraction portion (288) includes a bottom groove (2881) opened at the bottom of the feeding tube (283), and a plurality of electromagnets (2882) are fixedly connected to the top wall of the bottom groove (2881). The bottom surface of the electromagnet (2882) is coplanar with the bottom surface of the feeding tube (283). A battery (2883) is installed on the top of the moving plate (282), and the electromagnet (2882) is electrically connected to the battery (2883).

4. The internal temperature field testing device of an asphalt pavement structure according to claim 3 is characterized in that: A ball bearing (7) is movably connected inside the slide plate (4), a counterweight (8) is fixedly connected to the lower half of the outer wall of the ball bearing (7), and the temperature sensor (3) is fixedly connected to the lower half of the outer wall of the ball bearing (7). The upper half of the outer wall of the ball bearing (7) is fixedly connected to a placement plate (9) via a plurality of support rods, and the magnetic plate (6) is fixedly connected to the top of the placement plate (9). The lower half of the inner wall of the accommodating shell (1) is fixedly connected to two limit strips (10), and the bottom surface of the slide plate (4) is in contact with the limit strips (10).

5. The internal temperature field testing device of an asphalt pavement structure according to claim 4, characterized in that: The bottom of the top plate (23) is fixedly connected to a fixed shell (11), a piston (12) is slidably connected inside the fixed shell (11), a sliding bar (13) is fixedly connected to the bottom of the piston (12), the sliding bar (13) slides through the bottom wall of the fixed shell (11), and the bottom surface of the sliding bar (13) is fixedly connected to the moving plate (282), a hose (14) is fixedly penetrated through the lower half of the side wall of the fixed shell (11), a nozzle (15) is fixedly connected to the top wall of the bottom groove (2881), and the hose (14) is fixedly penetrated through the feeding pipe (283) and communicated with the nozzle (15).

6. The device for testing the internal temperature field of an asphalt pavement structure according to claim 5, characterized in that: A camera (16) and an illuminating lamp (17) are fixedly connected to the top wall of the bottom groove (2881), a display screen (18) is fixedly connected to the top of the top plate (23), and the camera (16), the illuminating lamp (17), and the display screen (18) are all electrically connected to the storage battery (2883).

7. The device for testing the internal temperature field of an asphalt pavement structure according to claim 6, characterized in that: The fixing portion (26) is a bolt that slides through the support plate (24) and the column (22), and the support plate (24) and the column (22) are fixedly connected by the bolt.

8. The device for testing the internal temperature field of an asphalt pavement structure according to claim 7, characterized in that: A one-way valve (19) is installed at the bottom of the fixed shell (11).

9. The device for testing the internal temperature field of an asphalt pavement structure according to claim 8, characterized in that: A plurality of limiting rods (20) are fixedly connected to the bottom of the containing shell (1).

10. A method for testing the internal temperature field of an asphalt pavement structure, comprising the device for testing the internal temperature field of an asphalt pavement structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When paving an asphalt road, the housing (1) is pre-buried in the asphalt, and the height of the temperature sensor (3) is slightly lower than the height required for the test; S2. After the asphalt road is flattened and dried, the staff transports the device body (2) to the pre-buried position of the containment shell (1), and starts the drilling unit (27) to drill a hole, so that the drill bit penetrates the containment shell (1); S3, then the drill bit is lifted and the top plate (23) is rotated so that the adjustment part (28) is located directly above the asphalt road opening; S4, the electric push rod (281) works, driving the feeding tube (283) to be inserted into the containing shell (1), until the electromagnet (2882) contacts the magnetic plate (6), and the electromagnet (2882) is started to work, so that the electromagnet (2882) adsorbs the magnetic plate (6); S5, the electric push rod (281) contracts, driving the magnetic plate (6), the slide plate (4) and the temperature sensor (3) to move upward, and the depth of the feeding pipe (283) inserted into the asphalt road is observed through the scale line (284). When the depth of the feeding pipe (283) inserted into the asphalt road plus the fixed distance between the magnetic plate (6) and the temperature sensor (3) is equal to the depth of the temperature sensor (3) required for the experiment, the electric push rod (281) stops; S6, the asphalt pump (286) works to transport asphalt into the feeding pipe (283), the asphalt enters the containing shell (1) through the discharge port (287), and moves to the temperature sensor (3) through the through hole (5), so that the containing shell (1) is filled with asphalt; S7, the electromagnet (2882) is powered off, and the electric push rod (281) continues to contract, so that the feeding pipe (283) moves upward and leaves the asphalt pavement, and waits for the asphalt in the containing shell (1) to dry, and then the internal temperature of the asphalt pavement can be tested by reading the data acquisition instrument.

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