A smart borehole excavation device for measuring roadbed compaction using the sand cone method.

Abstract

This invention provides an intelligent drilling device for measuring the compaction degree of roadbed using the sand cone method. Belonging to the technical field of sand cone method for measuring roadbed compaction degree, its structure includes a mobile vehicle. A lifting crossbeam is laterally arranged on the upper front side of the mobile vehicle, and two first telescopic joints are vertically arranged on the left and right sides of the lifting crossbeam. An intelligent drilling device is vertically arranged at the lower end between the two first telescopic joints. Multiple suction hoses connect the intelligent drilling device to a negative pressure suction device, thus constituting an intelligent drilling device for measuring the compaction degree of roadbed using the sand cone method. After drilling the measuring hole on the roadbed surface, this intelligent drilling device can intelligently scrape away any components that might stick to soil, ensuring that all soil generated during drilling is extracted and collected into the negative pressure suction device. This facilitates subsequent sand cone method measurements and comparisons, eliminating the need for manual soil collection by workers, saving time and labor, and demonstrating a high degree of automation.

Description

Technical Field

[0001] This invention relates to an intelligent drilling device for measuring the compaction degree of roadbed using the sand cone method, belonging to the technical field of measuring the compaction degree of roadbed using the sand cone method. Background Technology

[0002] The sand cone method is a fundamental testing method for measuring subgrade compaction. The process involves first digging a cylindrical hole of a specific diameter and depth in the ground and collecting the excavated soil. Then, using a sand cone device, sand is poured into the hole according to requirements. The subgrade compaction degree is calculated based on parameters such as the mass of the poured sand, the mass of the excavated soil, and the dimensions of the cylindrical hole.

[0003] Existing drilling devices still require manual collection of soil after drilling cylindrical holes. During drilling, most soil is discharged to the top periphery of the substrate, but residual soil remains on the drill bit, requiring manual cleaning and collection. A small amount of soil also remains at the bottom of the cylindrical hole, unable to be carried out by the drill bit's reciprocating motion, also requiring manual cleaning and collection. Furthermore, when collecting soil from the substrate, the presence of a standard circular hole in the center of the substrate for auxiliary positioning causes soil to easily flow out, making the collection of all soil after drilling very troublesome, time-consuming, and labor-intensive. Incomplete collection of discharged soil can also occur, affecting the accuracy of subsequent sand-filling measurements. To address these shortcomings, this invention proposes an intelligent drilling device for measuring roadbed compaction using the sand-filling method. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an intelligent drilling device for measuring the compaction degree of roadbed using the sand cone method, so as to solve the existing problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an intelligent hole-drilling device for measuring the compaction degree of roadbed using the sand-filling method, the structure of which includes a mobile vehicle, and a lifting crossbeam is laterally arranged on the upper front side of the mobile vehicle, and two first expansion joints are vertically arranged on the left and right sides of the lifting crossbeam, and an intelligent hole-drilling device is vertically arranged between the two first expansion joints at the lower end, and a negative pressure suction device is connected to the intelligent hole-drilling device through multiple suction hoses; the front side of the mobile vehicle is provided with an operating platform for electrically connecting to the first expansion joints, the intelligent hole-drilling device, and the negative pressure suction device.

[0006] The intelligent drilling device includes a material collection bucket assembly. A material suction component is movably fitted inside the middle of the material collection bucket assembly cavity for cleaning and suctioning the inner wall and bottom of the bucket. A drilling component is vertically installed at the right end of the material collection bucket assembly cavity for descending through the middle of the bottom surface of the material collection bucket assembly to dig a hole in the roadbed. A material suction component is vertically installed at the left end of the material collection bucket assembly cavity for descending through the middle of the bottom surface of the material collection bucket assembly to clean and suction the soil remaining at the bottom of the hole in the roadbed. A drill bit cleaning component is horizontally installed on the right side of the material collection bucket assembly, extending to the left and flexibly abutting against the lower end of the drilling component to clean residual soil.

[0007] A further improvement is that the material collection tank assembly consists of a material collection tank body and a tank cover. The bottom center of the material collection tank body has a drill bit through hole, and the top surface of the drill bit through hole is provided with an annular material collection protrusion. The top surface of the tank cover has a square channel for lateral displacement of the drilling assembly and the in-hole suction assembly to prevent jamming. The tank wall of the material collection tank body has multiple suction tube openings, cleaning telescopic openings, and installation openings.

[0008] A further improvement is that the in-bucket suction assembly includes two second telescopic joints, and a lifting plate is horizontally arranged at the lower end between the two second telescopic joints. A rotating disk is arranged around the bottom surface of the lifting plate, and a first suction head is arranged on the bottom surface of the rotating disk. A motor for driving the first suction head to reciprocate at 45° is engaged with the right side of the top surface of the first suction head.

[0009] A further improvement is that a first lifting opening is provided through the center of the top surface of the lifting plate, and multiple suction tube channels are provided in a circular array around the top surface of the lifting plate, with each suction tube channel being arc-shaped.

[0010] A further improvement is that the first suction head includes a first rotating plate, and the bottom surface of the first rotating plate is provided with a plurality of first suction nozzles arranged in a circular array. The upper end of each first suction nozzle moves through the suction tube channel. Two first wire brushes are provided on the left and right sides of each first suction nozzle for scraping apart the soil material collected at the lower periphery of the material collection barrel. The periphery of the first rotating plate is provided with an annular brush that rotates and cleans against the inner wall of the material collection barrel. An arc-shaped rack is provided on one side of the top surface of the first rotating plate. The motor is provided with a drive gear that meshes with the arc-shaped rack. A second lifting port is provided through the center of the top surface of the first rotating plate and is perpendicularly aligned with the first lifting port.

[0011] A further improvement is that the drilling assembly includes a support, on which a third expansion joint is laterally arranged, and a first transverse sliding seat is laterally arranged on the left side of the third expansion joint. A fourth expansion joint for lateral displacement through a square channel is vertically arranged on the first transverse sliding seat, and a drill and a drill bit are vertically arranged on the bottom surface of the fourth expansion joint. The diameter of the drill bit is 2-3 mm smaller than the inner diameter of the annular polymer flange.

[0012] A further improvement is that the in-hole suction assembly includes a fifth telescopic device that is laterally fitted into the installation opening, and a second transverse sliding seat is laterally arranged on the right side of the fifth telescopic device, and a sixth telescopic device that passes through the square channel for lateral displacement is vertically arranged on the second transverse sliding seat, and an in-hole cleaning assembly is arranged on the bottom surface of the sixth telescopic device.

[0013] A further improvement is that the in-hole cleaning assembly includes a second rotating plate, and the bottom surface of the second rotating plate is provided with a plurality of second suction nozzles in a circular array, and two second wire brush strips are provided on the left and right sides of each second suction nozzle. A rotator for driving the second rotating plate to reciprocate 90° is connected to the center of the top surface of the second rotating plate. The diameter of the second rotating plate is 2-3 mm smaller than the inner diameter of the annular material protrusion.

[0014] A further improvement is that the drill bit cleaning assembly includes a retraction seat that is horizontally installed on the outside of the cleaning telescopic opening, and a seventh telescopic device is horizontally arranged on the right side of the retraction seat. A shrinkage groove communicating with the cleaning telescopic opening is opened in the middle of the left side of the retraction seat. A high-elasticity steel wire brush head is horizontally arranged at the left end of the seventh telescopic device and fitted into the shrinkage groove. The length of the steel wire on the high-elasticity steel wire brush head is 10-15mm longer than the radius of the drill bit.

[0015] A further improvement is that the mobile vehicle, negative pressure suction device, drill, and drill bit are existing technologies, and their structures will not be described in detail here.

[0016] A further improvement is that the negative pressure feeder has a built-in collection box.

[0017] A further improvement is that the two second telescopic devices are servo telescopic devices, and the extension stroke is 1cm each time the servo descends, and the servo interval time is 6-10s.

[0018] The beneficial effects of this invention are:

[0019] This invention provides an intelligent excavation device for measuring roadbed compaction using the sand-filling method. The device comprises a material-collecting bucket assembly, an in-bucket suction component, a drilling component, a hole-filling suction component, and a drill bit cleaning component. Combined with a mobile vehicle, a lifting crossbeam, a first expansion joint, a negative pressure suction device, and an operating platform, this intelligent excavation device is used for measuring roadbed compaction using the sand-filling method. The first expansion joint assists the intelligent excavation device in vertical lifting and lowering, allowing it to lightly contact the roadbed surface, facilitating subsequent alignment and excavation of the measurement hole. The drilling component has lateral displacement and lifting functions, allowing its lower end to pass through the center of the bottom surface of the material-collecting bucket assembly to excavate the measurement hole. The drilling component can also repeatedly lift and lower to pull the soil from the measurement hole to the bottom periphery of the material-collecting bucket assembly for temporary storage. The drill bit cleaning component assists in the process. After the drilling assembly completes the excavation, the system automatically scrapes away any residual soil adhering to it, causing it to fall into the material collection bucket. This ensures that no soil remains after the drilling assembly resets. The negative pressure suction device simultaneously extracts the temporarily stored soil and residual soil from the bottom of the measuring hole within the material collection bucket, aided by the suction components inside the bucket and the hole itself. Both the suction components inside the bucket and the hole have lifting, rotating, and scraping functions, making soil extraction more convenient and preventing issues like soil not being easily extracted or incomplete extraction. After drilling the measuring hole on the roadbed surface, this intelligent excavation device can also intelligently scrape away any components that might stick to soil, ensuring that all soil generated during excavation is collected by the negative pressure suction device. This facilitates subsequent sand-filling measurement and comparison, eliminating the need for manual soil collection by workers, saving time and labor, and demonstrating a high degree of automation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an intelligent hole-drilling device for measuring the compaction degree of roadbed using the sand-filling method according to the present invention;

[0021] Figure 2 This is a schematic diagram of the intelligent hole-drilling device of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal suction assembly structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the polymer barrel assembly structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the top surface structure of the bucket lid of the present invention;

[0025] Figure 6 This is a schematic diagram of the top structure of the lifting plate of the present invention;

[0026] Figure 7 This is a schematic diagram of the bottom structure of the first suction head of the present invention;

[0027] Figure 8 This is a schematic diagram of the top surface structure of the first suction head of the present invention;

[0028] Figure 9 This is a schematic diagram of the drilling assembly structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the in-hole suction assembly structure of the present invention;

[0030] Figure 11 This is a schematic diagram of the drill bit cleaning assembly structure of the present invention. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Please see Figures 1-11 This invention provides an intelligent drilling device for measuring the compaction degree of roadbed using the sand cone method. Its structure includes a mobile vehicle 1, with a lifting crossbeam 2 horizontally arranged on the upper front side of the mobile vehicle 1. Two first expansion joints 3 are vertically arranged on the left and right sides of the lifting crossbeam 2. An intelligent drilling device 4 is vertically arranged between the two first expansion joints 3 at its lower end. Multiple suction hoses connect the intelligent drilling device 4 to a negative pressure suction device 5. An operating platform 6 is provided on the front side of the mobile vehicle 1 for electrical connection with the first expansion joints 3, the intelligent drilling device 4, and the negative pressure suction device 5. The intelligent drilling device 4 includes a material collection bucket assembly 41, with the material collection bucket assembly 41 having a central cavity... The movable sleeve is equipped with an in-bucket suction component 42 for cleaning and suctioning the inner wall and bottom of the material collection bucket assembly 41. A drilling component 43 is vertically installed at the right end of the cavity of the material collection bucket assembly 41 for descending through the middle of the bottom surface of the material collection bucket assembly 41 to dig a hole in the roadbed surface. A hole suction component 44 is vertically installed at the left end of the cavity of the material collection bucket assembly 41 for descending through the middle of the bottom surface of the material collection bucket assembly 41 to clean and suction the soil remaining at the bottom of the hole in the roadbed surface. A drill bit cleaning component 45 is horizontally installed on the right side of the material collection bucket assembly 41 for extending to the left and flexibly abutting against the lower end of the drilling component 43 to clean the residual soil.

[0033] The material collection bucket assembly 41 consists of a material collection bucket body 411 and a bucket cover 412. The material collection bucket body 411 has a drill bit through hole 413 in the middle of the bottom of the bucket. The top surface of the drill bit through hole 413 is provided with an annular material collection protrusion 414. The top surface of the bucket cover 412 has a square channel 415 for the drilling assembly 43 and the in-hole suction assembly 44 to move laterally and prevent jamming. The bucket wall of the material collection bucket body 411 has a plurality of suction tube through holes 416, cleaning telescopic through holes 417 and installation through holes 418 respectively.

[0034] The in-bucket suction assembly 42 includes two second telescopic members 421, and a lifting plate 422 is horizontally arranged at the lower end between the two second telescopic members 421. A rotating disk 423 is arranged around the bottom surface of the lifting plate 422. A first suction head 424 is arranged on the bottom surface of the rotating disk 423. A motor 425 for driving the first suction head 424 to reciprocate at 45° is driven on the right side of the top surface of the first suction head 424.

[0035] The lifting plate 422 has a first lifting opening 4221 through the center of its top surface, and multiple suction tube channels 4222 are arranged in a circular array around the top surface of the lifting plate 422, and each suction tube channel 4222 is arc-shaped.

[0036] The first suction head 424 includes a first rotating plate 4241, and a plurality of first suction nozzles 4242 are arranged in a circular array on the bottom surface of the first rotating plate 4241. The upper end of each first suction nozzle 4242 moves through the suction tube passage 4222. Two first wire brushes 4243 are provided on the left and right sides of each first suction nozzle 4242 for scraping apart the soil material collected at the lower periphery of the cavity of the material collection barrel body 411. The periphery of the first rotating plate 4241 is provided with an annular brush 4244 that rotates and cleans against the inner wall of the material collection barrel body 411. An arc-shaped rack 4245 is provided on one side of the top surface of the first rotating plate 4241. The motor 425 is provided with a drive gear that meshes with the arc-shaped rack 4245. A second lifting port 4246 is provided through the middle of the top surface of the first rotating plate 4241 and is perpendicularly aligned with the first lifting port 4221.

[0037] The drilling assembly 43 includes a support 431, on which a third telescopic device 432 is laterally arranged, and a first transverse sliding seat 433 is laterally arranged on the left side of the third telescopic device 432. A fourth telescopic device 434 is vertically arranged on the first transverse sliding seat 433, which passes through the square channel 415 for lateral displacement. A drill 435 and a drill bit 436 are vertically arranged on the bottom surface of the fourth telescopic device 434. The diameter of the drill bit 436 is 2-3 mm smaller than the inner diameter of the annular polymer flange 414.

[0038] The in-hole suction assembly 44 includes a fifth telescopic member 441 that is laterally fitted into the installation opening 418. A second transverse shift seat 442 is laterally arranged on the right side of the fifth telescopic member 441, and a sixth telescopic member 443 that passes through the square channel 415 and makes a transverse displacement is vertically arranged on the second transverse shift seat 442. An in-hole cleaning assembly 444 is arranged on the bottom surface of the sixth telescopic member 443.

[0039] The in-hole cleaning assembly 444 includes a second rotating plate 4441, and a plurality of second suction nozzles 4442 are arranged in a ring array on the bottom surface of the second rotating plate 4441. Two second wire brush strips 4443 are arranged on the left and right sides of each second suction nozzle 4442. A rotator 4444 for driving the second rotating plate 4441 to reciprocate 90° is connected to the center of the top surface of the second rotating plate 4441. The diameter of the second rotating plate 4441 is 2-3 mm smaller than the inner diameter of the annular material convex edge 414.

[0040] The drill bit cleaning assembly 45 includes a retraction seat 451 that is horizontally installed on the outside of the cleaning telescopic opening 417. A seventh telescopic device 452 is horizontally arranged on the right side of the retraction seat 451, and a contraction groove 453 communicating with the cleaning telescopic opening 417 is opened in the middle of the left side of the retraction seat 451. A high-elasticity steel wire brush head 454 is horizontally arranged at the left end of the seventh telescopic device 452 and is fitted into the contraction groove 453. The length of the steel wire on the high-elasticity steel wire brush head 454 is 10-15 mm longer than the radius of the drill bit 436.

[0041] Working principle:

[0042] When excavating a measurement hole in the roadbed, the intelligent excavation device 4 is first moved to the location above the ground to be measured by the mobile vehicle 1. Then, the two first expansion joints 3 are lowered, causing the bottom of the aggregate bucket assembly 41 to lightly touch the ground. Then, when the intelligent excavation device 4 is excavating the measurement hole, the third expansion joint 432 on the drilling assembly 43 is first operated to extend to the left. After passing through the first transverse moving seat 433, the fourth expansion joint 434, the drill 435, and the drill bit 436 are moved laterally to the left. At this time, the drill bit 436 is vertically aligned with the center points of the first lifting through-hole 4221, the second lifting through-hole 4246, the annular aggregate protrusion 414, and the drill bit through-hole 413. Then, the fourth expansion joint 3 is lowered to the left to lower the bottom of the aggregate bucket assembly 41. The device 434 descends and the drill 435 is activated to rotate the drill bit 436. The rotating drill bit 436 descends and passes through the first lifting opening 4221, the second lifting opening 4246, the annular material-gathering flange 414, and the drill bit through hole 413 in sequence to dig a measuring hole in the ground. The soil generated during drilling will be guided upward through the drill bit 436 to the lower periphery of the inner cavity of the material-gathering barrel body 411. The annular material-gathering flange 414 plays a role in preventing soil from flowing back into the measuring hole. After the measuring hole is dug, the fourth expansion joint 434 needs to lift and lower the rotating drill bit 436 multiple times to pull the soil out of the measuring hole to the lower periphery of the inner cavity of the material-gathering barrel body 411.

[0043] After the drilling assembly 43 has completed drilling, the drill bit 436 needs to rise to the horizontal position of the drill bit cleaning assembly 45 and assist in reciprocating up and down. Meanwhile, the seventh telescopic device 452 drives the high-elasticity steel wire brush head 454 to extend and flexibly abut against the drill bit 436 to sweep away the soil adhering to the drill bit 436 to the lower periphery of the inner cavity of the material collection bucket body 411. After completion, the drill bit cleaning assembly 45 first retracts to reset, and then the drilling assembly 43 rises to reset.

[0044] At this point, a small amount of soil will remain at the bottom of the borehole and will not be completely removed by the drill bit 436 during the material pulling process. This needs to be suctioned out by the borehole suction assembly 44 under negative pressure. First, the fifth expansion joint 441 extends to the right, and then the second transverse sliding seat 442 causes the sixth expansion joint 443 and the borehole cleaning assembly 444 to move laterally to the right. This ensures that the borehole cleaning assembly 444 is vertically aligned with the center points of the first lifting port 4221, the second lifting port 4246, the annular material-gathering flange 414, and the drill bit through-hole 413. Then... The six telescopic devices 443 drive the hole cleaning component 444 to descend vertically into the bottom of the measuring hole. At this time, the second wire brush 4443 will insert into the residual soil at the bottom of the measuring hole. Then, the rotary device 4444 drives the second rotary plate 4441 to rotate 90° back and forth, so that each second wire brush 4443 scrapes and loosens the residual soil, making it easier for the negative pressure suction device 5 to suck up the residual soil at the bottom of the measuring hole through each reciprocating second suction nozzle 4442 and collect it into the collection box built into the negative pressure suction device 5.

[0045] When the in-hole suction assembly 44 is operating, the synchronous in-bucket suction assembly 42 also performs negative pressure suction on the soil material pulled out during the excavation of the lower periphery of the inner cavity of the material collection bucket body 411. First, the two second expansion joints 421 are servo-driven to descend, and each descent extends by 1cm with an interval of 10s, so that the lifting plate 422, rotating disk 423, first suction head 424, and motor 425 are servo-driven to descend intermittently. Then, the motor 425 drives the first suction head 424 to rotate 45° back and forth, so that each first wire brush 4243 scrapes the soil material accumulated at the lower periphery of the inner cavity of the material collection bucket body 411 in layers with a thickness of 1cm. The loose, easily reciprocating first suction nozzles 4242 use negative pressure to scrape loose soil layer by layer into the collection box built into the negative pressure suction device 5. Meanwhile, the annular brush 4244 also uses a reciprocating rotation to scrape away the residual soil adhering to the inner wall of the aggregate bucket 411. Finally, with the coordinated operation of the negative pressure suction device 5, the in-hole suction component 44, and the in-bucket suction component 42, all the accumulated soil in the aggregate bucket 411 and the residual soil at the bottom of the measuring hole are extracted by negative pressure into the collection box built into the negative pressure suction device 5. This allows the staff to remove the soil from the collection box for subsequent comparison of the roadbed compaction degree measured by the sand filling method.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intelligent drilling device for measuring the compaction degree of roadbed using the sand cone method, characterized in that: Its structure includes a mobile vehicle, and a lifting crossbeam is horizontally arranged on the upper front side of the mobile vehicle. Two first telescopic devices are vertically arranged on the left and right sides of the lifting crossbeam. An intelligent hole-digging device is vertically arranged at the lower end between the two first telescopic devices. A negative pressure suction device is connected to the intelligent hole-digging device through multiple suction hoses. An operating platform for electrical connection with the first telescopic devices, the intelligent hole-digging device, and the negative pressure suction device is arranged on the front side of the mobile vehicle. The intelligent drilling device includes a material collection bucket assembly. A material suction component is movably fitted inside the middle of the material collection bucket assembly cavity for cleaning and suctioning the inner wall and bottom of the bucket. A drilling component is vertically installed at the right end of the material collection bucket assembly cavity for descending through the middle of the bottom surface of the material collection bucket assembly to dig a hole in the roadbed. A material suction component is vertically installed at the left end of the material collection bucket assembly cavity for descending through the middle of the bottom surface of the material collection bucket assembly to clean and suction the soil remaining at the bottom of the hole in the roadbed. A drill bit cleaning component is horizontally installed on the right side of the material collection bucket assembly for extending to the left and flexibly abutting against the lower end of the drilling component to clean residual soil. The material collection tank assembly consists of a material collection tank body and a tank cover. The bottom center of the material collection tank body has a drill bit through hole, and the top surface of the drill bit through hole is provided with an annular material collection protrusion. The top surface of the tank cover has a square channel for the drilling assembly and the in-hole suction assembly to move laterally and prevent jamming. The tank wall of the material collection tank body has multiple suction tube openings, cleaning telescopic openings and installation openings. The in-bucket suction assembly includes two second telescopic joints, and a lifting plate is horizontally arranged at the lower end between the two second telescopic joints. A rotating disk is arranged around the bottom surface of the lifting plate, and a first suction head is arranged on the bottom surface of the rotating disk. A motor for driving the first suction head to reciprocate at 45° is engaged on the right side of the top surface of the first suction head. The top surface of the lifting plate has a first lifting opening through the center, and the top surface of the lifting plate has multiple suction tube channels arranged in a circular array around the periphery, and each suction tube channel is arc-shaped. The first suction head includes a first rotating plate, and a plurality of first suction nozzles are arranged in a circular array on the bottom surface of the first rotating plate. The upper end of each first suction nozzle moves through the suction tube channel. Two first wire brushes are provided on the left and right sides of each first suction nozzle for scraping apart the soil material collected at the lower periphery of the material collection barrel. The periphery of the first rotating plate is provided with a ring brush that rotates and cleans against the inner wall of the material collection barrel. An arc-shaped rack is provided on one side of the top surface of the first rotating plate. The motor is provided with a drive gear that meshes with the arc-shaped rack. A second lifting port is opened through the middle of the top surface of the first rotating plate and is perpendicularly aligned with the first lifting port. The two second telescopic devices are servo telescopic devices, and the extension stroke is 1cm each time the servo descends, and the servo interval time is 6-10s; The in-hole suction assembly includes a fifth telescopic device that is horizontally fitted into the installation opening. A second transverse shift seat is horizontally arranged on the right side of the fifth telescopic device, and a sixth telescopic device that passes through the square channel and makes transverse displacement is vertically arranged on the second transverse shift seat. An in-hole cleaning assembly is arranged on the bottom surface of the sixth telescopic device. The in-hole cleaning assembly includes a second rotating plate, and a plurality of second suction nozzles are arranged in a ring array on the bottom surface of the second rotating plate. Two second wire brush strips are arranged on the left and right sides of each second suction nozzle. A rotator for driving the second rotating plate to reciprocate 90° is connected to the center of the top surface of the second rotating plate. The diameter of the second rotating plate is 2-3 mm smaller than the inner diameter of the annular material protrusion. The drill bit cleaning assembly includes a retractable seat that is horizontally installed on the outside of the cleaning telescopic opening. A seventh telescopic device is horizontally arranged on the right side of the retractable seat, and a shrinkage groove communicating with the cleaning telescopic opening is opened in the middle of the left side of the retractable seat. A high-elasticity steel wire brush head is horizontally arranged at the left end of the seventh telescopic device and fitted into the shrinkage groove. The length of the steel wire on the high-elasticity steel wire brush head is 10-15mm longer than the radius of the drill bit.

2. The intelligent drilling device for measuring roadbed compaction using the sand cone method according to claim 1, characterized in that: The drilling assembly includes a support, on which a third expansion joint is laterally arranged, and a first transverse sliding seat is laterally arranged on the left side of the third expansion joint. A fourth expansion joint for lateral displacement through a square channel is vertically arranged on the first transverse sliding seat, and a drill and a drill bit are vertically arranged on the bottom surface of the fourth expansion joint. The diameter of the drill bit is 2-3 mm smaller than the inner diameter of the annular polymer flange.

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