阅读说明：本技术 一种岩土工程勘察用钻探装置及使用方法 (Drilling device for geotechnical engineering investigation and using method ) 是由 潘泽真 于 2021-08-10 设计创作，主要内容包括：本发明提出一种岩土工程勘察用钻探装置及使用方法,该装置包括基座板,基座板顶部设有移动箱,移动箱内设有检测腔以及钻探腔；检测腔内设有信息采集装置,信息采集装置包括第一切换转盘,设于第一切换转盘上的三个卷扬机,以及分别设于三个卷扬机执行端的土壤硬度信息采集部件,土壤采样部件以及气体收集部件；钻探腔内设有钻地装置,钻地装置包括升降板,设于升降板底部的自伸缩钻头卡接部件,设于自伸缩钻头卡接部件下方的第二切换转盘,设于第二切换转盘上的多个钻头部件,以及设于钻探腔内壁的钻头淋洗保护部件。本发明是一种便于选取合适钻探探头,便于根据地下气体信息对钻探探头进行保护,便于对不同深度的地质进行取样的钻探装置。(The invention provides a drilling device for geotechnical engineering investigation and a using method thereof, wherein the device comprises a base plate, the top of the base plate is provided with a movable box, and a detection cavity and a drilling cavity are arranged in the movable box; an information acquisition device is arranged in the detection cavity, and comprises a first switching turntable, three winches arranged on the first switching turntable, and a soil hardness information acquisition part, a soil sampling part and a gas collection part which are respectively arranged at the execution ends of the three winches; the drilling cavity is internally provided with an earth drilling device which comprises a lifting plate, a self-telescopic drill bit clamping part arranged at the bottom of the lifting plate, a second switching turntable arranged below the self-telescopic drill bit clamping part, a plurality of drill bit parts arranged on the second switching turntable, and a drill bit leaching protection part arranged on the inner wall of the drilling cavity. The drilling device is convenient for selecting a proper drilling probe, protecting the drilling probe according to underground gas information and sampling geology at different depths.)

1. The drilling device for geotechnical engineering investigation comprises a base plate (10) and is characterized in that a plurality of driving wheels (11) and supporting driving cylinders (12) are arranged at the bottom of the base plate (10), a working through hole (13) is formed in the top of the base plate (10), a moving box (14) is arranged at the top of the base plate (10), moving driving components (15) fixed on the base plate (10) are symmetrically arranged on two sides of the moving box (14), the moving box (14) is internally divided into a detection cavity (16) and a drilling cavity (17) from left to right through a partition plate, and the moving driving components (15) are used for moving one of the detection cavity (16) and the drilling cavity (17) to the position right above the working through hole (13);

an information acquisition device (20) is arranged in the detection cavity (16), the information acquisition device (20) comprises a first switching rotary table (21) arranged in the detection cavity (16), a first stepping motor (22) arranged at the top of the movable box (14) and used for driving the first switching rotary table (21) to rotate, three winches (23) arranged on the first switching rotary table (21) and having execution ends penetrating through the first switching rotary table (21), and a soil hardness information acquisition part (24), a soil sampling part (25) and a gas collection part (26) which are respectively arranged at the execution ends of the three winches (23);

be equipped with in probing chamber (17) and bore ground device (30), it includes sliding connection to bore ground device (30) the lifter plate (31) of probing chamber (17) inner wall is located from flexible drill bit joint part (32) of lifter plate (31) bottom, locates second step motor (33) of removal case (14) outer wall are located second step motor (33) execution end just is located second switching carousel (34) from flexible drill bit joint part (32) lower part locate a plurality of drill bit parts (35) on second switching carousel (34) and locate probing chamber (17) inner wall just is located drill bit drip washing protection part (36) of second switching carousel (34) below.

2. The drilling apparatus for geotechnical engineering investigation of claim 1, wherein, said moving driving part (15) comprises a slide rail (151) disposed on said base plate (10), a slide block (152) slidably connected to the inner wall of said slide rail (151), a driving motor (153) disposed on said base plate (10) and located at one end of said slide rail (151), and a first lead screw (154) disposed at the execution end of said driving motor (153) and screw-connected to said slide block (152), said slide block (152) is connected to the outer wall of said movable box (14).

3. The drilling apparatus for geotechnical investigation according to claim 1, wherein said soil hardness information collecting member (24) comprises a housing tube (241) provided at an execution end of one of the winches (23), a tapered weight block (242) provided at a bottom of said housing tube (241), a first hydraulic cylinder (243) provided at a top of an inner wall of said housing tube (241), a pressure sensor (244) provided at an execution end of said first hydraulic cylinder (243), and a needle bar (245) provided at a bottom of said pressure sensor (244), said needle bar (245) penetrating through said tapered weight block (242).

4. The drilling apparatus for geotechnical investigation according to claim 1, wherein said soil sampling member (25) comprises a connecting plate (251) disposed at an actuating end of one of the windlasses (23), a hopper receiving box (252) disposed at a bottom of said connecting plate (251), a telescopic cylinder (253) disposed at a bottom of said connecting plate (251), an L-shaped feeding plate (254) disposed at an actuating end of said telescopic cylinder (253), a first driving motor (255) disposed at a sidewall of said L-shaped feeding plate (254), and an auger (256) disposed at an actuating end of said first driving motor (255).

5. The drilling device for geotechnical engineering investigation of claim 1, wherein said gas collecting component (26) comprises a collecting box (261) arranged at the executing end of one winch (23), an elastic air bag (262) arranged in the collecting box (261), an electric cylinder (263) arranged on the outer wall of the collecting box (261) and connected with the elastic air bag (262) by the executing end penetrating through the collecting box (261), and a gas detecting sensor (264) arranged in the elastic air bag (262), wherein the elastic air bag (262) is communicated with an air inlet pipe (265) and an air outlet pipe (266) penetrating through the collecting box (261), and the air inlet pipe (265) and the air outlet pipe (266) are respectively provided with an air inlet check valve (2651) and an air outlet check valve (2661).

6. The drilling device for geotechnical engineering investigation according to claim 1, wherein the top of the movable box (14) is provided with a lifting driving component (37), the lifting driving component (37) comprises a second transmission motor (371) symmetrically arranged on the top of the movable box (14), and a second lead screw (372) with one end connected with an execution end of the second transmission motor (371) and the other end rotatably connected with the bottom of the inner wall of the drilling cavity (17), and the second lead screw (372) is connected with the lifting plate (31) through a nut.

7. The drilling apparatus for geotechnical engineering investigation of claim 1, wherein said self-expandable bit-engaging member (32) comprises an outer sleeve (321) disposed at the bottom of said lifting plate (31), a second hydraulic cylinder (322) disposed at the top of the inner wall of said outer sleeve (321), an anti-rotation engaging tube (323) disposed at the actuating end of said second hydraulic cylinder (322), and an electromagnetic block (324) disposed at the top of the inner wall of said anti-rotation engaging tube (323).

8. A drilling device for geotechnical investigation according to claim 1, characterized in that, said bit member (35) includes a fixed box (351) for clamping said second switching turntable (34), and a third transmission motor (352) disposed in said fixed box (351), and an actuating end of said third transmission motor (352) penetrates through the fixed box (351) and is connected with the bit (353).

9. The drilling apparatus for geotechnical investigation according to claim 1, characterized in that, said bit leaching protection member (36) includes a leaching ring (361) provided on the inner wall of said drilling chamber (17), and a feeding pipe (362) communicating with said leaching ring (361) and extending to the outside of the moving box (14).

10. A use method of a drilling device for geotechnical engineering investigation is characterized by comprising the following steps:

the method comprises the following steps: the soil hardness information acquisition part 24 is used for collecting hardness information, the PLC receives the hardness information and triggers the second stepping motor 33 to drive the second switching turntable 34 to rotate so as to switch the corresponding drill bit part 35 to be right below the self-telescopic drill bit clamping part 32, and drilling can be carried out after the self-telescopic drill bit clamping part 32 is connected with the drill bit part 35;

step two: after drilling unit depth, forming a first drill hole, resetting the ground drilling device 30, detecting the bottom of the first drill hole by the soil hardness information acquisition component 24 to switch a proper drill bit component 35, simultaneously sampling soil by the soil sampling component 25, acquiring underground gas information data by the gas collection component 26, receiving the underground gas information data by the PLC, and triggering the drill bit to wash the protection component 36 when the underground gas information data is abnormal;

step three: the self-expansion drill bit clamping component 32 drives the drill bit component 35 to drill the first drilled hole continuously, at the moment, the drill bit leaching protection component 36 leaches the protection liquid for the drill bit component 35, and the ground drilling device 30 resets after the unit depth of drilling so as to repeatedly collect hardness information and gas information data.

Technical Field

The invention relates to the technical field of geotechnical engineering, in particular to a drilling device for geotechnical engineering investigation and a using method thereof.

Background

Geotechnical engineering is to solve the problems of rock and soil engineering, including foundation and foundation, slope and underground engineering. In geotechnical engineering investigation, drilling is often required to obtain geological information. When carrying out geotechnical engineering investigation, geotechnical engineering investigation drilling equipment is indispensable instrument.

The prior patent (application number: 201921482414.7) provides a drilling device for geotechnical engineering investigation, which comprises a fixed bottom plate, wherein a corrugated pipe is fixedly connected to the middle of the top end of the fixed bottom plate, a movable plate is fixedly connected to the top end of the corrugated pipe, a damping spring positioned inside the corrugated pipe is fixedly connected to the bottom of the movable plate, a motor is fixedly mounted at the top of the movable plate, supporting arms are fixedly connected to the left end and the right end of the top of the fixed bottom plate, anti-skid rings are sleeved outside the supporting arms, and a motor control key is fixedly mounted at the top of the left supporting arm. The drilling device has the advantages of small volume, light weight and convenience in carrying.

However, in the above device, it is inconvenient to select a suitable drilling probe according to soil hardness information, and it is inconvenient to protect the drilling probe according to underground gas information, and it is inconvenient to sample geologies of different depths.

Disclosure of Invention

Based on this, the present invention provides a drilling device for geotechnical engineering investigation and a method for using the same, so as to solve the technical problems in the background art.

The invention provides a drilling device for geotechnical engineering investigation, which comprises a base plate, wherein the bottom of the base plate is provided with a plurality of driving wheels and supporting driving cylinders, the top of the base plate is provided with a working through hole, the top of the base plate is provided with a movable box, two sides of the movable box are symmetrically provided with movable driving parts fixed on the base plate, the movable box is internally divided into a detection cavity and a drilling cavity by a partition plate from left to right, and the movable driving parts are used for moving one of the detection cavity and the drilling cavity to the position right above the working through hole;

an information acquisition device is arranged in the detection cavity and comprises a first switching rotary table arranged in the detection cavity, a first stepping motor arranged at the top of the mobile box and used for driving the first switching rotary table to rotate, three winches arranged on the first switching rotary table and provided with execution ends penetrating through the first switching rotary table, and a soil hardness information acquisition part, a soil sampling part and a gas collection part which are respectively arranged at the execution ends of the three winches;

the utility model discloses a drilling device, including boring, drilling chamber, drilling chamber, drilling chamber, drilling chamber.

Preferably, the movable driving part comprises a slide rail arranged on the base plate, a slide block connected with the inner wall of the slide rail, a driving motor arranged on the base plate and positioned at one end of the slide rail, and a first lead screw arranged at the execution end of the driving motor and connected with a nut, wherein the slide block is connected with the outer wall of the movable box. In the present preferred embodiment, the stable movement of the moving box is achieved by moving the driving part.

Preferably, the soil hardness information acquisition component comprises an outer cover pipe arranged at one winch execution end, a conical weight block arranged at the bottom of the outer cover pipe, a first hydraulic cylinder arranged at the top of the inner wall of the outer cover pipe, a pressure sensor arranged at the execution end of the first hydraulic cylinder, and a needle rod arranged at the bottom of the pressure sensor, wherein the needle rod penetrates through the conical weight block. In the preferred embodiment, the soil hardness information collecting component is used for facilitating the collection of the hardness information of the land.

Preferably, the soil sampling part comprises a connecting plate arranged at one winch execution end, a funnel receiving box arranged at the bottom of the connecting plate, a telescopic cylinder arranged at the bottom of the connecting plate, an L-shaped feeding plate arranged at the execution end of the telescopic cylinder, a first transmission motor arranged on the side wall of the L-shaped feeding plate, and a packing auger arranged at the execution end of the first transmission motor. In the preferred embodiment, the soil sampling component is used for conveniently collecting soil substances in different depths in the drilled hole.

Preferably, the gas collecting component comprises a collecting box arranged at the execution end of one winch, an elastic air bag arranged in the collecting box, an electric cylinder arranged on the outer wall of the collecting box and provided with an execution end penetrating through the collecting box to be connected with the elastic air bag, and a gas detection sensor arranged in the elastic air bag, wherein the elastic air bag is communicated with an air inlet pipe and an air outlet pipe penetrating through the collecting box, and the air inlet pipe and the air outlet pipe are respectively provided with an air inlet check valve and an air outlet check valve. In the preferred embodiment, the collection of gas within the drilled hole is facilitated by a gas collection member.

Preferably, the top of the mobile box is provided with a lifting driving part, the lifting driving part comprises a second transmission motor symmetrically arranged at the top of the mobile box, and a second lead screw, one end of the second lead screw is connected with an execution end of the second transmission motor, the other end of the second lead screw is rotatably connected with the bottom of the inner wall of the drilling cavity, and the second lead screw is connected with a lifting plate. In the preferred embodiment, the lifting plate is stably lifted and lowered by the lifting driving part.

Preferably, the self-expansion drill bit clamping part comprises an outer sleeve arranged at the bottom of the lifting plate, a second hydraulic cylinder arranged at the top of the inner wall of the outer sleeve, an anti-rotation clamping pipe arranged at the execution end of the second hydraulic cylinder, and an electromagnetic block arranged at the top of the inner wall of the anti-rotation clamping pipe. In the preferred embodiment, the connection of the drill bit components for drilling is facilitated by self-retracting drill bit engagement members.

Preferably, the drill bit part comprises a fixed box for clamping the second switching turntable and a third transmission motor arranged in the fixed box, and the execution end of the third transmission motor penetrates through the fixed box to be connected with the ground drilling head. In the preferred embodiment, earth boring is accomplished by a drill bit member.

Preferably, the drill rinsing protection component comprises a rinsing ring arranged on the inner wall of the drilling cavity, and a feeding pipe communicated with the rinsing ring and extending to the outside of the mobile box. In the preferred embodiment, the protective liquid is conveniently washed by the protective component.

The invention also provides a using method of the drilling device for geotechnical engineering investigation, which specifically comprises the following steps:

the method comprises the following steps: the soil hardness information acquisition part is used for collecting hardness information, the PLC receives the hardness information and triggers the second stepping motor to drive the second switching turntable to rotate so as to switch the corresponding drill bit part to be right below the self-telescopic drill bit clamping part, and drilling can be carried out after the self-telescopic drill bit clamping part is connected with the drill bit part;

step two: after the unit depth is drilled, a first drill hole is formed, the ground drilling device is reset, the soil hardness information acquisition component can perform in-detection on the bottom of the first drill hole to switch a proper drill bit component, meanwhile, the soil sampling component performs soil sampling, the gas collection component performs underground gas information data acquisition, the PLC receives the underground gas information data, and triggers the drill bit to rinse the protection component when the underground gas information data is abnormal;

step three: the self-telescopic drill bit clamping component drives the drill bit component to continue drilling the first drilled hole, the drill bit leaching protection component leaches the protection liquid for the drill bit component at the moment, the ground drilling device resets after the unit depth of drilling, and hardness information collection and gas information data collection can be repeatedly carried out.

Compared with the prior art, the invention has the beneficial effects that:

according to the drilling device for geotechnical engineering investigation, a suitable drilling probe can be conveniently selected according to soil hardness information through the soil hardness information acquisition component and the second switching turntable; the drilling probe is conveniently protected according to underground gas information through the gas collecting component and the drill bit leaching protection component; the soil sampling component is convenient for sampling geologies at different depths;

realize the stable removal of removal case through removing the driver part, be convenient for collect the hardness information in soil through soil hardness information acquisition part, be convenient for gather the soil property of the different degree of depth in the probing hole through soil sampling part, be convenient for collect the gas in the probing hole through gas collection part, realize the stable lift of lifter plate through lift driver part, be convenient for connect the drill bit part through from flexible drill bit joint part, in order to carry out the probing, realize boring through the drill bit part, be convenient for drip washing protective solution to the drill bit through drill bit drip washing protective component.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention as set forth above.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is an axonometric view of the overall structure of a drilling device for geotechnical engineering investigation proposed by the present invention;

FIG. 2 is an exploded view of the overall structure of a drilling apparatus for geotechnical engineering investigation according to the present invention;

FIG. 3 is an exploded view of an information collecting apparatus of a drilling apparatus for geotechnical engineering investigation according to the present invention;

FIG. 4 is an exploded view of a structure of an earth-boring device in a drilling apparatus for geotechnical engineering investigation in accordance with the present invention;

fig. 5 is a plan view of an overall structure of a drilling apparatus for geotechnical engineering investigation according to the present invention;

FIG. 6 is a sectional view showing the structure of an information collecting apparatus in a boring apparatus for geotechnical engineering investigation according to the present invention;

fig. 7 is a structural sectional view of an earth-boring device in a drilling apparatus for geotechnical engineering investigation in accordance with the present invention;

fig. 8 is a structural sectional view of a gas collecting member in a drilling apparatus for geotechnical engineering investigation in accordance with the present invention.

Description of the main symbols:

10. a base plate; 11. a drive wheel; 12. supporting the driving cylinder; 13. a working through hole; 14. a mobile box; 15. a movement driving part; 151. a slide rail; 152. a slider; 153. a drive motor; 154. a first lead screw; 16. a detection chamber; 17. a drilling cavity; 20. an information acquisition device; 21. a first switching dial; 22. a first stepper motor; 23. a winch; 24. a soil hardness information acquisition component; 241. an outer shroud tube; 242. a conical weight block; 243. a first hydraulic cylinder; 244. a pressure sensor; 245. a needle bar; 25. a soil sampling component; 251. a connecting plate; 252. a funnel receiving box; 253. a telescopic cylinder; 254. an L-shaped feed plate; 255. a first drive motor; 256. a packing auger; 26. a gas collection member; 261. a collection box; 262. an elastic air bag; 263. an electric cylinder; 264. a gas detection sensor; 265. an air inlet pipe; 2651. an air inlet check valve; 266. an exhaust pipe; 2661. an exhaust check valve; 30. an earth-boring device; 31. a lifting plate; 32. a self-telescoping drill bit engagement member; 321. an outer sleeve; 322. a second hydraulic cylinder; 323. the anti-rotation clamping pipe is connected; 324. an electromagnetic block; 33. a second stepping motor; 34. a second switching dial; 35. a drill bit member; 351. a fixed box; 352. a third drive motor; 353. drilling a ground head; 36. leaching the protective component by using the drill bit; 361. leaching a ring; 362. a feed pipe; 37. a lifting drive member; 371. a second drive motor; 372. and a second screw rod.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 8, the present invention provides a drilling apparatus for geotechnical engineering investigation, which comprises a base plate 10, a plurality of driving wheels 11 and a supporting driving cylinder 12 provided at the bottom of the base plate 10.

The top of the base plate 10 is provided with a work through hole 13, and the top of the base plate 10 is provided with a movable box 14. The movable driving member 15 fixed to the base plate 10 is symmetrically provided on both sides of the movable box 14, and the movable box 14 is divided into a detection chamber 16 and a drilling chamber 17 on the left and right by a partition. Wherein the movement driving means 15 is adapted to move one of the detection chamber 16 and the drilling chamber 17 directly above the working through hole 13.

The moving driving part 15 includes a slide rail 151 disposed on the base plate 10, a slider 152 slidably connected to an inner wall of the slide rail 151, a driving motor 153 disposed on the base plate 10 and located at one end of the slide rail 151, and a first lead screw 154 disposed at an execution end of the driving motor 153 and connected to the slider 152 by a nut, wherein the slider 152 is connected to an outer wall of the moving box 14.

In this embodiment, the entire apparatus is moved to the position to be drilled by the driving wheels 11, and the support driving cylinders 12 are supported. The detection cavity 16 is moved to the position right above the working through hole 13 by moving the driving part 15, and the first switching rotary disc 21 is driven to rotate by the first stepping motor 22 so as to switch the soil hardness information acquisition part 24 to the working position. In addition, the soil hardness information collecting part 24 is driven by the winch 23 to contact the ground surface for hardness information collection, and the PLC controller receives the hardness information collection and triggers the second stepping motor 33 to drive the second switching turntable 34 to rotate, so as to switch the corresponding drill bit part 35 to be right below the self-telescopic drill bit clamping part 32. At this time, the drilling chamber 17 is moved to a position just above the working through hole 13 by the movement driving member 15, and drilling is performed after the drill member 35 is connected to the extendable drill engaging member 32.

After drilling a unit depth, a first borehole is formed, the earth-boring device 30 is reset, and the soil hardness information acquisition component 24 can perform detection on the bottom of the first borehole to switch the appropriate drill bit component 35. Meanwhile, the soil sampling part 25 can sample soil, the gas collecting part 26 can collect underground gas information data, and the PLC receives the underground gas information data and triggers the drill bit rinsing protection part 36 when the underground gas information data is abnormal.

The self-telescopic drill bit clamping component 32 drives the drill bit component 35 to drill the first drilled hole, at the moment, the drill bit leaching protection component 36 leaches the protection liquid for the drill bit component 35, the ground drilling device 30 resets after the unit depth of drilling, and hardness information collection and gas information data collection can be repeatedly carried out, so that the drill bit component 35 can be conveniently switched and protected.

Further, when the moving driving part 15 works, the execution end of the driving motor 153 drives the first lead screw 154 to rotate, the first lead screw 154 drives the sliding block 152 to move, and the sliding block 152 drives the moving box 14 to move.

The soil hardness information detection device comprises an information acquisition device 20, wherein the information acquisition device 20 comprises a first switching rotary table 21 arranged in the detection cavity 16, a first stepping motor 22 arranged at the top of the movable box 14 and used for driving the first switching rotary table 21 to rotate, three winches 23 arranged on the first switching rotary table 21 and having execution ends penetrating through the first switching rotary table 21, a soil hardness information acquisition part 24, a soil sampling part 25 and a gas collection part 26, wherein the soil hardness information acquisition part 24, the soil sampling part 25 and the gas collection part 26 are respectively arranged at the execution ends of the three winches 23.

Specifically, the soil hardness information collecting member 24 includes a housing tube 241 provided at an executing end of one of the winding machines 23, a tapered weight block 242 provided at a bottom of the housing tube 241, a first hydraulic cylinder 243 provided at a top portion of an inner wall of the housing tube 241, a pressure sensor 244 provided at an executing end of the first hydraulic cylinder 243, and a needle bar 245 provided at a bottom portion of the pressure sensor 244. Wherein the needle bar 245 extends through the tapered weight block 242.

In addition, the soil sampling component 25 includes a connection board 251 disposed at an execution end of one of the windlasses 23, a funnel receiving box 252 disposed at a bottom of the connection board 251, a telescoping cylinder 253 disposed at a bottom of the connection board 251, an L-shaped feeding board 254 disposed at an execution end of the telescoping cylinder 253, a first transmission motor 255 disposed at a side wall of the L-shaped feeding board 254, and an auger 256 disposed at an execution end of the first transmission motor 255.

The gas collecting member 26 includes a collecting box 261 provided at an execution end of one of the winding machines 23, an elastic air bag 262 provided in the collecting box 261, an electric cylinder 263 provided on an outer wall of the collecting box 261 and having an execution end penetrating the collecting box 261 and connected to the elastic air bag 262, and a gas detecting sensor 264 provided in the elastic air bag 262. The elastic air bag 262 is connected to an air inlet pipe 265 and an air outlet pipe 266 which are inserted into the collecting box 261, and the air inlet pipe 265 and the air outlet pipe 266 are provided with an air inlet check valve 2651 and an air outlet check valve 2661, respectively.

It should be noted that, in this embodiment, the first stepping motor 22 drives the first switching turntable 21 to rotate so as to switch one of the soil hardness information collecting part 24, the soil sampling part 25 and the gas collecting part 26 to the working position, and the winch 23 facilitates to lower the device for working.

Further, when the soil hardness information acquisition component 24 works, the tapered weight block 242 contacts the ground, the first hydraulic cylinder 243 drives the needle rod 245 to be inserted into the ground, the pressure sensor 244 transmits pressure data to the PLC, and the PLC acquires hardness information after calculation and analysis.

Further, when the soil sampling component 25 works, the telescopic cylinder 253 drives the L-shaped feeding plate 254 to move to contact with the wall of the detection drilling hole, the first transmission motor 255 drives the packing auger 256 to rotate, and the packing auger 256 rotates to move the soil sample into the funnel receiving box 252 through the L-shaped feeding plate 254 so as to finish sampling.

Further, when the gas collecting member 26 is operated, the electric cylinder 263 pulls the elastic airbag 262, the elastic airbag 262 expands, the underground gas enters the elastic airbag 262 through the air inlet pipe 265, and the gas detecting sensor 264 acquires the underground gas information data.

In addition, an earth boring device 30 is provided in the boring cavity 17. Specifically, the earth boring device 30 includes a lifting plate 31 slidably connected to the inner wall of the drilling chamber 17, a self-expanding bit engaging member 32 disposed at the bottom of the lifting plate 31, a second stepping motor 33 disposed on the outer wall of the movable box 14, a second switching turntable 34 disposed at an execution end of the second stepping motor 33 and located below the self-expanding bit engaging member 32, a plurality of bit members 35 disposed on the second switching turntable 34, and a bit rinsing protection member 36 disposed on the inner wall of the drilling chamber 17 and located below the second switching turntable 34.

In the present embodiment, the lifting drive member 37 is provided on the top of the movable box 14. Specifically, the lifting driving component 37 includes a second transmission motor 371 symmetrically disposed on the top of the movable box 14, and a second lead screw 372 having one end connected to the execution end of the second transmission motor 371 and the other end rotatably connected to the bottom of the inner wall of the drilling cavity 17, wherein the second lead screw 372 is connected to the lifting plate 31 through a nut.

The self-expansion bit fastening part 32 comprises an outer sleeve 321 arranged at the bottom of the lifting plate 31, a second hydraulic cylinder 322 arranged at the top of the inner wall of the outer sleeve 321, an anti-rotation fastening pipe 323 arranged at the execution end of the second hydraulic cylinder 322, and an electromagnetic block 324 arranged at the top of the inner wall of the anti-rotation fastening pipe 323.

The drill bit part 35 comprises a fixed box 351 clamped with the second switching turntable 34 and a third transmission motor 352 arranged in the fixed box 351, and an execution end of the third transmission motor 352 penetrates through the fixed box 351 to be connected with a drill bit 353. In addition, the bit washout protector 36 includes a washout ring 361 provided on the inner wall of the drilling chamber 17, and a feed pipe 362 communicating with the washout ring 361 and extending to the outside of the traveling box 14.

It should be noted that, in this embodiment, when the self-retracting bit engaging member 32 is connected to the bit member 35, the second driving motor 371 drives the second lead screw 372 to rotate, the second lead screw 372 drives the lifting plate 31 to descend, at this time, the rotation-preventing engaging pipe 323 engages the fixing box 351, the electromagnetic block 324 magnetically attracts the fixing box 351, the third driving motor 352 drives the bit 353 to rotate, so as to drill the ground, and the second hydraulic cylinder 322 can drive the bit member 35 to move down continuously, so as to increase the drilling depth.

Further, when the bit leaching protection component 36 works, a protection liquid can be injected into the leaching ring 361 through the feeding pipe 362, and the protection liquid protects the self-telescopic bit clamping component 32 and the outer wall of the bit component 35.

There will also be provided in accordance with the above embodiments a method of using a drilling apparatus for geotechnical engineering investigation, comprising the steps of:

the method comprises the following steps: the soil hardness information acquisition part 24 is used for collecting hardness information, the PLC receives the hardness information and triggers the second stepping motor 33 to drive the second switching turntable 34 to rotate so as to switch the corresponding drill bit part 35 to be right below the self-telescopic drill bit clamping part 32, and drilling can be carried out after the self-telescopic drill bit clamping part 32 is connected with the drill bit part 35;

step two: after drilling unit depth, forming a first drill hole, resetting the ground drilling device 30, detecting the bottom of the first drill hole by the soil hardness information acquisition component 24 to switch a proper drill bit component 35, simultaneously sampling soil by the soil sampling component 25, acquiring underground gas information data by the gas collection component 26, receiving the underground gas information data by the PLC, and triggering the drill bit to wash the protection component 36 when the underground gas information data is abnormal;

step three: the self-telescopic drill bit clamping component 32 drives the drill bit component 35 to drill the first drilled hole, at the moment, the drill bit leaching protection component 36 leaches the protection liquid for the drill bit component 35, the ground drilling device 30 resets after the unit depth of drilling, and hardness information collection and gas information data collection can be repeatedly carried out, so that the drill bit component 35 can be conveniently switched and protected.

The specific process of the invention is as follows:

the model of the PLC is 'OSM-RPLC', the model of the pressure sensor 244 is 'NF-103B', and the model of the gas detection sensor 264 is 'TCS 208F'.

The device is integrally moved to a position to be drilled through a driving wheel 11, a driving cylinder 12 is supported, a detection cavity 16 is moved to a position right above a working through hole 13 through a moving driving part 15, a first stepping motor 22 drives a first switching rotary table 21 to rotate so as to switch a soil hardness information acquisition part 24 to a working position, the soil hardness information acquisition part 24 is driven by a winch 23 to be in contact with the ground for hardness information collection, a PLC (programmable logic controller) receives the hardness information collection and triggers a second stepping motor 33 to drive a second switching rotary table 34 to rotate so as to switch a corresponding drill bit part 35 to a position right below a self-telescopic drill bit clamping part 32, at the moment, the moving driving part 15 moves a drilling cavity 17 to a position right above the working through hole 13, and the self-telescopic drill bit clamping part 32 is connected with the drill bit part 35 for drilling;

after drilling unit depth, forming a first drill hole, resetting the ground drilling device 30, detecting the bottom of the first drill hole by the soil hardness information acquisition component 24 to switch a proper drill bit component 35, simultaneously sampling soil by the soil sampling component 25, acquiring underground gas information data by the gas collection component 26, receiving the underground gas information data by the PLC, and triggering the drill bit to wash the protection component 36 when the underground gas information data is abnormal;

the self-telescopic drill bit clamping component 32 drives the drill bit component 35 to drill the first drilled hole continuously, at the moment, the drill bit leaching protection component 36 leaches the protection liquid for the drill bit component 35, the ground drilling device 30 resets after drilling for a unit depth, and hardness information collection and gas information data collection can be repeatedly carried out, so that the drill bit component 35 can be switched and protected conveniently;

when the moving driving part 15 works, the execution end of the driving motor 153 drives the first screw rod 154 to rotate, the first screw rod 154 drives the sliding block 152 to move, and the sliding block 152 drives the moving box 14 to move;

the first stepping motor 22 drives the first switching rotary table 21 to rotate so as to switch one of the soil hardness information collecting part 24, the soil sampling part 25 and the gas collecting part 26 to a working position, and the winch 23 is convenient for putting down the device for working;

when the soil hardness information acquisition component 24 works, the conical weight block 242 contacts the bottom surface, the first hydraulic cylinder 243 drives the needle rod 245 to be inserted into the bottom surface, the pressure sensor 244 transmits pressure data to the PLC, and the PLC acquires hardness information after calculation and analysis;

when the soil sampling component 25 works, the telescopic cylinder 253 drives the L-shaped feeding plate 254 to move to contact with the wall of the detection drilled hole, the first transmission motor 255 drives the packing auger 256 to rotate, and the packing auger 256 rotates to move the soil sample into the funnel receiving box 252 through the L-shaped feeding plate 254 so as to finish sampling;

when the gas collecting component 26 works, the electric cylinder 263 pulls the elastic air bag 262, the elastic air bag 262 expands, underground gas enters the elastic air bag 262 through the air inlet pipe 265, and the gas detection sensor 264 acquires underground gas information data;

when the self-expansion drill bit clamping part 32 is connected with the drill bit part 35, the second transmission motor 371 drives the second screw rod 372 to rotate, the second screw rod 372 drives the lifting plate 31 to descend, the self-rotation preventing clamping pipe 323 is clamped with the fixed box 351 at the moment, the electromagnetic block 324 magnetically attracts the fixed box 351, the third transmission motor 352 drives the drill bit 353 to rotate so as to drill the ground, and the second hydraulic cylinder 322 can drive the drill bit part 35 to continuously move downwards so as to increase the drilling depth;

when the drill rinsing protection component 36 works, a protection liquid can be injected into the rinsing ring 361 through the feeding pipe 362, and the protection liquid protects the self-telescopic drill clamping component 32 and the outer wall of the drill component 35.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.