Intelligent hole digging device for measuring roadbed compaction degree through sand filling method

Abstract

The invention provides an intelligent hole digging device for measuring the compaction degree of a roadbed through a sand filling method, and belongs to the technical field of measurement of the compaction degree of the roadbed through the sand filling method. The intelligent hole digging device structurally comprises a moving vehicle, a lifting transverse frame is transversely arranged at the upper end of the front side face of the moving vehicle, and two first expansion pieces are vertically arranged on the left side and the right side of the lifting transverse frame; an intelligent hole digging device is vertically arranged at the lower end between the two first expansion pieces, and the intelligent hole digging device is connected with a negative pressure material suction device through a plurality of material suction hoses, so that the intelligent hole digging device for measuring the compaction degree of the roadbed through the sand filling method is formed. All mechanism parts which can adhere to soil materials can be intelligently scraped and swept, so that all the soil materials generated during hole digging can be extracted and collected into the negative pressure material suction device by negative pressure, subsequent sand filling method measurement and comparison use is facilitated, workers do not need to manually collect the soil materials, time and labor are saved, and the automation degree is high.

Description

Technical Field

[0001] The present invention relates to an intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method, and belongs to the technical field of measuring the compaction degree of subgrade by the sand replacement method. Background Art

[0002] Measuring the compaction degree of subgrade by the sand replacement method is a basic detection method for subgrade detection. During detection, it is necessary to first dig a cylindrical hole with a certain diameter and depth on the ground, collect the excavated soil, and then use a sand filling device to fill the cylindrical hole with bright sand according to requirements. The compaction degree of the subgrade is calculated based on parameters such as the mass of the filled bright sand, the mass of the excavated soil, and the size of the cylindrical hole.

[0003] For the existing hole-digging device, after drilling the cylindrical hole, the collection of soil materials still adopts manual collection. During the drilling process, most of the soil materials will be exported to the peripheral edge of the top surface of the base plate, but there will still be residual soil materials sticking to the drill bit of the hole-digging device that need to be manually cleaned and collected. There will also be a small amount of soil materials remaining at the bottom of the cylindrical hole that cannot be taken out when the drill bit reciprocates upward, and manual cleaning and collection are still required. Moreover, when the soil materials on the base plate are recycled, since a standard round hole is provided in the middle of the base plate to assist in positioning drilling, the soil materials are likely to flow out from the standard round hole, making the collection operation of all the soil materials after hole-digging very troublesome, time-consuming and laborious, and it is also easy to have the problem that the discharged soil materials are not collected in place, affecting the accuracy of subsequent measurement by the sand replacement method. In view of the above deficiencies, the present invention proposes an intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method. Summary of the Invention

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to provide an intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method to solve the existing problems.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions: An intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method, its structure includes a mobile vehicle, and a lifting cross frame is horizontally arranged at the upper end of the front side of the mobile vehicle, and two first telescopic devices are vertically arranged on the left and right sides of the lifting cross frame. A smart hole-digging device is vertically arranged at the lower end between the two first telescopic devices. The smart hole-digging device is connected to a negative pressure suction device through a plurality of suction hoses. An operating platform for electrically connecting the first telescopic device, the smart hole-digging device, and the negative pressure suction device is arranged on the front side of the mobile vehicle; The intelligent hole-digging device includes a material collecting bucket group. In the middle of the cavity of the material collecting bucket group, there is a bucket inner material suction component that is movably sleeved and used for cleaning the inner barrel wall and the inner barrel bottom of the material collecting bucket group and sucking materials. And vertically arranged at the right end of the cavity of the material collecting bucket group is a drilling component that is used to descend through the middle of the bottom surface of the material collecting bucket group to dig holes in the roadbed ground. Vertically arranged at the left end of the cavity of the material collecting bucket group is a hole inner material suction component that is used to descend through the middle of the bottom surface of the material collecting bucket group to clean and suck the soil materials remaining at the bottom of the hole in the roadbed ground. Horizontally arranged on the right side of the material collecting bucket group is a drill bit cleaning component that is used to extend leftward and is movably and softly abutted against the lower end of the drilling component to clean the remaining soil materials.

[0006] Further improved, the material collecting bucket group is composed of a material collecting bucket body and a bucket cover. In the middle of the bottom of the material collecting bucket body, there is a drill bit through-hole. The circumferential edge of the top surface of the drill bit through-hole is provided with an annular material collecting convex edge. Horizontally opened on the top surface of the bucket cover is a square channel used to prevent the drilling component and the hole inner material suction component from being stuck during lateral displacement. On the barrel wall of the material collecting bucket body, there are respectively opened a plurality of straw pipe through-holes, cleaning telescopic through-holes and installation through-holes.

[0007] Further improved, the bucket inner material suction component includes two second telescopic devices. Horizontally arranged at the lower end between the two second telescopic devices is a lifting plate. And the circumferential edge of the bottom surface of the lifting plate is provided with a rotating disk. The bottom surface of the rotating disk is provided with a first material suction head. On the right side of the top surface of the first material suction head, there is a motor that is drivingly engaged to drive the first material suction head to rotate reciprocally by 45°.

[0008] Further improved, a first lifting through-hole is vertically opened in the middle of the top surface of the lifting plate. And a plurality of straw pipe moving channels are arranged in a circular array along the circumferential edge of the top surface of the lifting plate. And each straw pipe moving channel is arc-shaped.

[0009] Further improved, the first material suction head includes a first rotating plate. A plurality of first material suction nozzles are sleeved in a circular array on the bottom surface of the first rotating plate. And the upper end of each first material suction nozzle movably passes through the straw pipe moving channel. On the left and right sides of each first material suction nozzle, there are two first steel wire brush strips used to scrape and disperse layer by layer the soil materials collected along the circumferential edge at the lower end of the cavity of the material collecting bucket body. The circumferential edge of the first rotating plate is provided with an annular brush that is softly abutted against the inner barrel wall of the material collecting bucket body for rotary cleaning. On one side of the top surface of the first rotating plate, there is an arc-shaped rack. And on the motor, there is a driving gear that is engaged with the arc-shaped rack. Vertically opened in the middle of the top surface of the first rotating plate is a second lifting through-hole that is vertically aligned with the first lifting through-hole.

[0010] Further improved, the drilling assembly includes a support, on which a third telescopic device is horizontally arranged, and a first transverse moving seat is horizontally arranged on the left side of the third telescopic device. A fourth telescopic device vertically arranged on the first transverse moving seat transversely displaces through a square channel, and a drilling device and a drill bit part are vertically arranged on the bottom surface of the fourth telescopic device. The diameter of the drill bit part is 2-3 mm smaller than the inner diameter of the annular material collecting convex edge.

[0011] Further improved, the in-hole material suction assembly includes a fifth telescopic device horizontally sleeved in the installation through-hole, and a second transverse moving seat is horizontally arranged on the right side of the fifth telescopic device. A sixth telescopic device vertically arranged on the second transverse moving seat transversely displaces through a square channel, and an in-hole cleaning assembly is arranged on the bottom surface of the sixth telescopic device.

[0012] Further improved, the in-hole cleaning assembly includes a second rotating plate, and a plurality of second suction nozzles are sleeved on the bottom surface of the second rotating plate in an annular array. Two second wire brush strips are arranged beside the left and right sides of each second suction nozzle. A rotator for driving the second rotating plate to reciprocally rotate by 90° is drivingly connected to the middle 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 collecting convex edge.

[0013] Further improved, the drill bit cleaning assembly includes a retraction seat horizontally installed outside the cleaning telescopic through-hole, and a seventh telescopic device is horizontally arranged on the right side of the retraction seat. A contraction groove communicating with the cleaning telescopic through-hole is opened in the middle of the left side surface of the retraction seat. A highly elastic wire brush head sleeved in the contraction groove is horizontally arranged at the left end of the seventh telescopic device. The length of the wire on the highly elastic wire brush head is 10-15 mm longer than the radius of the drill bit part.

[0014] Further improved, the mobile vehicle, the negative pressure material suction device, the drilling device and the drill bit part are of the prior art, and the structures will not be described in detail one by one here.

[0015] Further improved, a collection box is built in the negative pressure material suction device.

[0016] Further improved, the two second telescopic devices are servo telescopic devices, and the stroke of each servo descending extension is 1 cm, and the servo intermittent time is 6-10 s.

[0017] The beneficial effects of the present invention are: The present invention provides an intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method. Through the structural combination design of the intelligent hole-digging device composed of a material collecting bucket group, a material suction component inside the bucket, a drilling component, a material suction component inside the hole, and a drill bit cleaning component, and a mobile vehicle, a lifting cross frame, a first telescopic device, a negative pressure material suction device, and an operating platform, an intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method is formed. Among them, the first telescopic device assists the intelligent hole-digging device to perform vertical lifting and gently adhere to the gap of the subgrade, facilitating the subsequent alignment and hole-digging measurement operation of the intelligent hole-digging device. And the drilling component has functions of lateral displacement and lifting, facilitating the lower end of the drilling component to pass through the middle of the bottom surface of the material collecting bucket group to dig a measurement hole in the subgrade surface, and the drilling component can also lift and lower repeatedly to pull out the soil material in the measurement hole to the peripheral bottom of the cavity of the material collecting bucket group for temporary storage. And the drill bit cleaning component is used to assist the lower end of the drilling component after the hole is dug to automatically scrape and sweep the adhered residual soil material into the material collecting bucket group, so that after the drilling component is reset, there will be no remaining soil material. Among them, the negative pressure material suction device assists the material suction component inside the bucket and the material suction component inside the hole to synchronously perform negative pressure extraction of the temporarily stored and accumulated soil material at the lower end of the cavity of the material collecting bucket group and the residual soil material at the bottom of the measurement hole. And both the material suction component inside the bucket and the material suction component inside the hole have functions such as lifting, rotating, and scraping, making the extraction of soil material by the negative pressure material suction device more convenient, and there will be no problems of immovable or incomplete negative pressure extraction of soil material. After the intelligent hole-digging device finishes drilling the measurement hole in the subgrade bottom surface, it can also intelligently scrape and sweep each mechanism component that will adhere to the soil material, so that the soil material generated during hole-digging can be completely extracted by negative pressure and collected into the negative pressure material suction device, facilitating the subsequent comparison and use of the sand replacement method, without the need for manual collection of soil material by workers, saving time and effort, and having a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method according to the present invention; Figure 2 It is a schematic structural diagram of the intelligent hole-digging device of the present invention; Figure 3 It is a schematic structural diagram of the material suction component inside the bucket of the present invention; Figure 4 It is a schematic structural diagram of the material collecting bucket group of the present invention; Figure 5 It is a schematic structural diagram of the top surface of the bucket cover of the present invention; Figure 6 It is a schematic structural diagram of the top surface of the lifting plate of the present invention; Figure 7 It is a schematic structural diagram of the bottom surface of the first material suction head of the present invention; Figure 8 It is a schematic structural diagram of the top surface of the first material suction head of the present invention; Figure 9 It is a schematic structural diagram of the drilling component of the present invention; Figure 10Schematic structural diagram of the in-hole material suction component of the present invention; Figure 11 Schematic structural diagram of the drill bit cleaning component of the present invention. Detailed implementation manners

[0019] To make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0020] Please refer to Figures 1 - 11 , the present invention provides an intelligent hole-digging device for measuring the compactness of subgrade by the sand replacement method: its structure includes a mobile vehicle 1, and a lifting cross frame 2 is horizontally arranged at the upper end of the front side of the mobile vehicle 1, and two first telescopic devices 3 are vertically arranged on the left and right sides of the lifting cross frame 2. A smart hole-digging device 4 is vertically arranged at the lower end between the two first telescopic devices 3. The smart hole-digging device 4 is connected to a negative pressure material suction device 5 through a plurality of material suction hoses. An operating platform 6 for electrically connecting the first telescopic device 3, the smart hole-digging device 4, and the negative pressure material suction device 5 is arranged on the front side of the mobile vehicle 1. The smart hole-digging device 4 includes a material collecting bucket group 41, and a bucket inner material suction component 42 for cleaning the inner barrel wall and inner barrel bottom of the material collecting bucket group 41 and performing material suction operations is movably sleeved in the middle of the cavity of the material collecting bucket group 41. A drilling component 43 for descending through the middle of the bottom surface of the material collecting bucket group 41 to dig holes in the subgrade ground is vertically arranged at the right end of the cavity of the material collecting bucket group 41. An in-hole material suction component 44 for descending through the middle of the bottom surface of the material collecting bucket group 41 to clean and suck the soil material remaining at the bottom of the hole in the subgrade ground is vertically arranged at the left end of the cavity of the material collecting bucket group 41. A drill bit cleaning component 45 for extending leftward and movably and softly abutting against the lower end of the drilling component 43 to clean the remaining soil material is horizontally arranged on the right side surface of the material collecting bucket group 41.

[0021] The material collecting bucket group 41 is composed of a material collecting bucket body 411 and a bucket cover 412. A drill bit through hole 413 is opened in the middle of the bottom of the material collecting bucket body 411. An annular material collecting convex edge 414 is arranged along the circumference of the top surface of the drill bit through hole 413. A square channel 415 for preventing the drilling component 43 and the in-hole material suction component 44 from being stuck during horizontal displacement is horizontally opened on the top surface of the bucket cover 412. A plurality of suction pipe through holes 416, cleaning telescopic through holes 417, and installation through holes 418 are respectively opened on the barrel wall of the material collecting bucket body 411.

[0022] The bucket inner material suction component 42 includes two second telescopic devices 421. A lifting plate 422 is horizontally arranged at the lower end between the two second telescopic devices 421. A rotating disk 423 is arranged along the circumference of the bottom surface of the lifting plate 422. A first material suction head 424 is arranged on the bottom surface of the rotating disk 423. A motor 425 for driving the first material suction head 424 to perform a 45° reciprocating rotation is meshed with the right side of the top surface of the first material suction head 424.

[0023] A first lifting through hole 4221 is formed through the middle of the top surface of the lifting plate 422. A plurality of suction pipe running tracks 4222 are arranged along the circumference of the top surface of the lifting plate 422 in an annular array, and each of the suction pipe running tracks 4222 is arc-shaped.

[0024] The first suction head 424 includes a first rotating plate 4241. A plurality of first suction nozzles 4242 are sleeved on the bottom surface of the first rotating plate 4241 in an annular array. The upper ends of the first suction nozzles 4242 pass through the suction pipe running tracks 4222 movably. On the left and right sides of each of the first suction nozzles 4242, there are two first wire brush strips 4243 for scraping and dispersing the soil layers converging along the lower circumference of the cavity of the material collecting barrel body 411. An annular brush 4244 is arranged along the circumference of the first rotating plate 4241 for rotatably cleaning by being in soft contact with the inner barrel wall of the material collecting barrel body 411. An arc-shaped rack 4245 is arranged on one side of the top surface of the first rotating plate 4241. A driving gear meshing with the arc-shaped rack 4245 is arranged on the motor 425. A second lifting through hole 4246 perpendicular to and aligned with the first lifting through hole 4221 is formed through the middle of the top surface of the first rotating plate 4241.

[0025] The drilling assembly 43 includes a support 431. A third telescopic device 432 is arranged horizontally on the support 431. A first transverse moving seat 433 is arranged horizontally on the left side of the third telescopic device 432. A fourth telescopic device 434 vertically arranged on the first transverse moving seat 433 passes through the square channel 415 for horizontal displacement. A drilling device 435 and a drill bit part 436 are vertically arranged on the bottom surface of the fourth telescopic device 434. The diameter of the drill bit part 436 is 2 - 3 mm smaller than the inner diameter of the annular material collecting convex edge 414.

[0026] The in-hole suction component 44 includes a fifth telescopic device 441 horizontally sleeved in the installation through hole 418. A second transverse moving seat 442 is arranged horizontally on the right side of the fifth telescopic device 441. A sixth telescopic device 443 vertically arranged on the second transverse moving seat 442 passes through the square channel 415 for horizontal displacement. A hole cleaning component 444 is arranged on the bottom surface of the sixth telescopic device 443.

[0027] The hole cleaning component 444 includes a second rotating plate 4441. A plurality of second suction nozzles 4442 are sleeved on the bottom surface of the second rotating plate 4441 in an annular array. On the left and right sides of each of the second suction nozzles 4442, there are two second wire brush strips 4443. A rotator 4444 for driving the second rotating plate 4441 to rotate reciprocally by 90° is drivingly connected to the middle 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 collecting convex edge 414.

[0028] The drill cleaning assembly 45 includes a retraction seat 451 horizontally installed outside the cleaning telescopic through - hole 417. A seventh telescopic device 452 is horizontally arranged on the right side of the retraction seat 451. A contraction groove 453 communicating with the cleaning telescopic through - hole 417 is opened in the middle of the left side surface of the retraction seat 451. A highly elastic steel wire brush head 454 sleeved in the contraction groove 453 is horizontally arranged at the left end of the seventh telescopic device 452. The length of the steel wire on the highly elastic steel wire brush head 454 is 10 - 15 mm longer than the radius of the drill bit part 436.

[0029] Working principle: When measuring holes in the subgrade, first, the intelligent hole - digging device 4 is moved to the position above the ground to be measured by the mobile vehicle 1. Then, it descends through two first telescopic devices 3, driving the bottom surface of the material - gathering bucket group 41 to gently contact the ground. When the intelligent hole - digging device 4 digs the measuring hole, first, the third telescopic device 432 on the drilling assembly 43 extends to the left. Passing through the first transverse movement seat 433, the fourth telescopic device 434, the drill 435, and the drill bit part 436 are displaced horizontally to the left. At this time, the drill bit part 436 is vertically aligned with the central points of the first lifting through - hole 4221, the second lifting through - hole 4246, the annular material - gathering convex edge 414, and the drill bit through - hole 413. Then, it descends through the fourth telescopic device 434, and the drill 435 is started to rotate the drill bit part 436. The rotating drill bit part 436 descends in turn through the first lifting through - hole 4221, the second lifting through - hole 4246, the annular material - gathering convex edge 414, and the drill bit through - hole 413 to perform the operation of digging the measuring hole on the ground. The soil material generated during drilling will be guided upward through the drill bit part 436 to the lower - peripheral edge of the inner cavity of the material - gathering bucket body 411. The annular material - gathering convex edge 414 plays a role in preventing the soil material from flowing back into the measuring hole. When the measuring hole is dug, the fourth telescopic device 434 needs to lift and lower the rotating drill bit part 436 multiple times to guide the soil material in the measuring hole out and into the lower - peripheral edge of the inner cavity of the material - gathering bucket body 411.

[0030] When the drilling assembly 43 finishes digging the hole, the drill bit part 436 needs to rise to the horizontal position of the drill cleaning assembly 45 and assist in reciprocating lifting and lowering. The seventh telescopic device 452 drives the highly elastic steel wire brush head 454 to extend and gently contact the drill bit part 436 to sweep away the soil material sticking to the drill bit part 436 into the lower - peripheral edge of the inner cavity of the material - gathering bucket body 411. After completion, the drill cleaning assembly 45 first retracts and resets initially, and then the drilling assembly 43 rises and resets initially.

[0031] At this time, there will still be a small amount of soil remaining at the bottom of the measurement hole that has not been completely exported by the drill bit part 436 during the pulling of the guiding material. It is necessary to perform negative pressure suction treatment through the in-hole suction component 44. First, the fifth telescopic device 441 extends to the right, and through the second transverse movement seat 442, the sixth telescopic device 443 and the in-hole cleaning component 444 are horizontally displaced to the right, so that the in-hole cleaning component 444 is vertically aligned with the central points of the first lifting through-hole 4221, the second lifting through-hole 4246, the annular material gathering convex edge 414, and the drill bit through-hole 413. Then, the sixth telescopic device 443 drives the in-hole cleaning component 444 to vertically descend into the bottom of the measurement hole. At this time, the second wire brush strip 4443 will be inserted into the remaining soil at the bottom of the measurement hole. Then, the rotator 4444 drives the second rotating plate 4441 to perform a 90° reciprocating rotation, so that each second wire brush strip 4443 scrapes and loosens the remaining soil, facilitating the negative pressure suction device 5 to suck the remaining soil at the bottom of the measurement hole through each reciprocatingly rotating second suction nozzle 4442 and collect it into the collection box built into the negative pressure suction device 5.

[0032] When the in-hole suction component 44 is operating, the in-barrel suction component 42 also performs negative pressure suction treatment on the soil pulled out during the excavation of the lower peripheral edge of the inner cavity of the material gathering barrel body 411. First, the two second telescopic devices 421 servo-descend, and in a way that each descent extension stroke is 1 cm and the intermittent time is 10 s, the lifting plate 422, the rotating disk 423, the first suction head 424, and the motor 425 as a whole servo-intermittently descend. Then, the motor 425 drives the first suction head 424 to perform a 45° reciprocating rotation, so that each first wire brush strip 4243 scrapes and loosens the soil accumulated on the lower peripheral edge of the inner cavity of the material gathering barrel body 411 layer by layer with a thickness of 1 cm, facilitating each reciprocatingly rotating first suction nozzle 4242 to suck the layer-by-layer scraped and loosened soil into the collection box built into the negative pressure suction device 5 through negative pressure. The annular brush 4244 will also use a reciprocating rotation method to scrape and clean the remaining soil adhered to the inner barrel wall of the material gathering barrel body 411. Finally, with the coordinated cooperation of the negative pressure suction device 5, the in-hole suction component 44, and the in-barrel suction component 42, all the accumulated soil in the material gathering barrel body 411 and the remaining soil at the bottom of the measurement hole are taken to the collection box built into the negative pressure suction device 5 by negative pressure extraction, facilitating the staff to take out the soil in the collection box for subsequent comparison in the sand replacement method for measuring the subgrade compaction degree.

[0033] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0034] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative style of the specification is only for clarity. A person skilled in the art should regard 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 a person skilled in the art.

Claims

1. An intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method, characterized in that: Its structure includes a mobile vehicle, and a lifting cross-frame is horizontally arranged at the upper end of the front side of the mobile vehicle. Two first telescopic devices are vertically arranged on the left and right sides of the lifting cross-frame. A smart hole-drilling device is vertically arranged at the lower end between the two first telescopic devices. The smart hole-drilling device is connected to a negative-pressure suction device through multiple suction hoses. An operating platform for electrically connecting to the first telescopic device, the smart hole-drilling device, and the negative-pressure suction device is arranged on the front side of the mobile vehicle. The smart hole-drilling device includes a material-gathering bucket group. A bucket inner suction component for cleaning the inner barrel wall and bottom of the material-gathering bucket group and performing suction operations is movably sleeved in the middle of the cavity of the material-gathering bucket group. A drilling component for descending through the middle of the bottom surface of the material-gathering bucket group to drill holes in the roadbed ground is vertically arranged at the right end of the cavity of the material-gathering bucket group. A hole inner suction component for descending through the middle of the bottom surface of the material-gathering bucket group to clean and suck the soil remaining at the bottom of the hole in the roadbed ground is vertically arranged at the left end of the cavity of the material-gathering bucket group. A drill bit cleaning component for extending leftward and movably and softly abutting against the lower end of the drilling component to clean the remaining soil is horizontally arranged on the right side surface of the material-gathering bucket group.

2. The intelligent hole-digging device for measuring the subgrade compaction degree by the sand replacement method according to claim 1, wherein: The material-gathering bucket group is composed of a material-gathering bucket body and a bucket cover. A drill bit through-hole is opened in the middle of the bottom of the material-gathering bucket body. An annular material-gathering convex edge is arranged along the circumference of the top surface of the drill bit through-hole. A square channel for preventing the drilling component and the hole inner suction component from being stuck during horizontal displacement is horizontally opened on the top surface of the bucket cover. A plurality of suction pipe through-holes, cleaning telescopic through-holes, and installation through-holes are respectively opened on the barrel wall of the material-gathering bucket body.

3. The intelligent digging device for measuring the compaction degree of subgrade by the sand replacement method according to claim 2, characterized in that: The bucket inner suction component includes two second telescopic devices. A lifting plate is horizontally arranged at the lower end between the two second telescopic devices. A rotating disk is arranged along the circumference of the bottom surface of the lifting plate. A first suction head is arranged on the bottom surface of the rotating disk. A motor for driving the first suction head to perform a 45° reciprocating rotation is drivingly engaged with the right side of the top surface of the first suction head.

4. The intelligent digging device for measuring the compaction degree of subgrade by the sand replacement method according to claim 3, characterized in that: A first lifting through-hole is vertically opened in the middle of the top surface of the lifting plate. A plurality of suction pipe walking channels are arranged in an annular array along the circumference of the top surface of the lifting plate, and each suction pipe walking channel is arc-shaped.

5. The intelligent excavation device for measuring the compaction degree of subgrade by the sand replacement method according to claim 4, characterized in that: The first suction head includes a first rotating plate. A plurality of first suction nozzles are sleeved in an annular array on the bottom surface of the first rotating plate. The upper end of each first suction nozzle movably passes through the suction pipe walking channel. Two first wire brush strips for scraping and dispersing the soil gathered along the circumference of the lower end of the cavity of the material-gathering bucket body layer by layer are arranged beside the left and right sides of each first suction nozzle. An annular brush for rotatably cleaning and softly abutting against the inner barrel wall of the material-gathering bucket body is arranged along the circumference of the first rotating plate. An arc-shaped rack is arranged on one side of the top surface of the first rotating plate. A driving gear engaged with the arc-shaped rack is arranged on the motor. A second lifting through-hole vertically aligned with the first lifting through-hole is vertically opened in the middle of the top surface of the first rotating plate.

6. The intelligent digging device for measuring the compaction degree of subgrade by the sand replacement method according to claim 5, characterized in that: The drilling component includes a support. A third telescopic device is horizontally arranged on the support. A first transverse moving seat is horizontally arranged on the left side of the third telescopic device. A fourth telescopic device for horizontally displacing through the square channel is vertically arranged on the first transverse moving seat. A drilling device and a drill bit part are vertically arranged on the bottom surface of the fourth telescopic device. The diameter of the drill bit part is 2-3 mm smaller than the inner diameter of the annular material-gathering convex edge.

7. The intelligent digging device for measuring the compaction degree of subgrade by the sand replacement method according to claim 6, wherein: The in-hole material suction assembly includes a fifth telescopic device horizontally sleeved in the installation through-hole, and a second transverse moving seat is horizontally arranged on the right side of the fifth telescopic device. A sixth telescopic device that performs horizontal displacement through the square channel is vertically arranged on the second transverse moving seat, and an in-hole cleaning assembly is arranged on the bottom surface of the sixth telescopic device.

8. An intelligent hole-digging device for measuring the compaction degree of subgrade by the sand replacement method according to claim 7, characterized in that: The in-hole cleaning assembly includes a second rotating plate, and a plurality of second suction nozzles are sleeved on the bottom surface of the second rotating plate in an annular array. Two second wire brush strips are arranged beside the left and right sides of each second suction nozzle. The middle part of the top surface of the second rotating plate is drivingly connected with a rotator for driving the second rotating plate to perform a 90° reciprocating rotation. The diameter of the second rotating plate is 2-3 mm smaller than the inner diameter of the annular material gathering convex edge.

9. The intelligent digging device for measuring the compaction degree of subgrade by the sand replacement method according to claim 8, characterized in that: The drill bit cleaning assembly includes a retraction seat horizontally installed outside the cleaning telescopic through-hole, and a seventh telescopic device is horizontally arranged on the right side of the retraction seat. A contraction groove communicating with the cleaning telescopic through-hole is opened in the middle of the left side surface of the retraction seat. A highly elastic wire brush head sleeved in the contraction groove is horizontally arranged at the left end of the seventh telescopic device, and the length of the wire on the highly elastic wire brush head is 10-15 mm longer than the radius of the drill bit part.

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