Sampling device for geotechnical survey

Abstract

The invention relates to the technical field of geological survey, and particularly discloses a geotechnical survey sampling device which comprises a vertically-arranged and hollow sampling column and a plurality of sampling assemblies arranged on the sampling column. The plurality of sampling assemblies are distributed along the vertical direction; the sampling assembly comprises a pair of samplers respectively arranged on two opposite sides of the sampling column, and a driving device arranged in the sampling column; the sampler comprises a first connecting plate hinged to the outer wall of the sampling column, a second connecting plate hinged to the outer wall of the sampling column, and a sampling box simultaneously hinged to the first connecting plate and the second connecting plate; the second connecting plate is arranged above the first connecting plate, the first connecting plate and the second connecting plate are equal in length and parallel to each other, and an opening of the sampling box faces upwards; the first connecting plate is hinged to the outer wall of the sampling column through a horizontally-arranged rotating shaft, and the driving device is used for driving the first connecting plate to rotate with the rotating shaft as the circle center. According to the sampling device for the geotechnical survey, disclosed by the invention, sampling operation can be efficiently carried out on geotechnical samples with different depths in a drill hole.

Description

Technical Field

[0001] The present invention relates to the technical field of geological exploration, and more particularly, to a geotechnical exploration sampling device. Background Art

[0002] Underground geotechnical sampling is an important part of geological exploration, which plays an important role in understanding underground structures, underground geotechnical properties, analyzing geological origins, and utilizing geothermal resources. Conventional geological exploration sampling methods mainly include drilling sampling method, excavation sampling method, ultrasonic sampling method, resistivity sampling method, seismic exploration method, chemical analysis method, etc. These methods all have good effects according to different actual situations.

[0003] For a geological environment where the main body is geotechnical and resources (such as geothermal resources) need to be taken at a relatively deep depth (such as a depth greater than 1000 meters), the drilling sampling method is more suitable. The drilling sampling method mainly involves first drilling through a drilling device. After drilling to a certain depth, a sampler is used to take out the samples at a certain depth. However, for the case of multi-depth sampling (taking geotechnical samples at multiple depths at the same drilling position for analysis), the operation is relatively cumbersome, and it is necessary to frequently switch between drilling and sampling, resulting in poor sampling efficiency. Moreover, samples usually need to be taken and analyzed at different positions in an area. Therefore, the overall sampling will consume a large amount of time. Therefore, a more efficient sampling device can be designed. Summary of the Invention

[0004] The purpose of the present invention is to provide a geotechnical exploration sampling device that can efficiently sample geotechnical samples at different depths in a borehole.

[0005] The present invention is achieved through the following technical solutions: The geotechnical exploration sampling device of the present invention includes a vertically arranged and hollow sampling column, and a plurality of sampling components provided on the sampling column; the plurality of sampling components are distributed along the vertical direction; the sampling component includes a pair of samplers respectively provided on opposite sides of the sampling column, and a driving device provided inside the sampling column; the sampler includes a first connecting plate hinged to the outer wall of the sampling column, a second connecting plate hinged to the outer wall of the sampling column, and a sampling box simultaneously hinged to the first connecting plate and the second connecting plate; the second connecting plate is provided above the first connecting plate, the first connecting plate and the second connecting plate are equal in length and parallel to each other, and the sampling box is arranged with an upward opening; the first connecting plate is hinged to the outer wall of the sampling column through a horizontally arranged rotating shaft, and the driving device is used to drive the first connecting plate to rotate around the rotating shaft.

[0006] Further, the driving device includes a driving tube vertically arranged inside the sampling column and sealed at both ends, a gas supply device communicated with the driving tube, a pressure relief valve arranged on the driving tube, a sliding tube horizontally arranged and communicated with the side of the driving tube, a sliding rod hermetically sliding inside the sliding tube, and a lever horizontally arranged at one end of the sliding rod outside the sampling column; the sliding rod penetrates through the side wall of the sampling column; the first connecting plate is of a hollow structure, and a first through hole is formed on one side of the first connecting plate close to the sampling column; the sliding rod passes through the first through hole, and the lever is arranged inside the first connecting plate.

[0007] Further, the driving device further includes a counterweight block slidably arranged inside the driving tube, a second through hole formed on the counterweight block, and a pair of pull ropes arranged on the upper side of the counterweight block; the pair of pull ropes are respectively connected to the pair of sliding rods.

[0008] Further, the driving device further includes a spring arranged under the counterweight block; the upper end of the spring is connected to the counterweight block, and the lower end of the spring is connected to the inner bottom wall of the driving tube.

[0009] Further, the gas supply device includes a compressed gas cylinder arranged inside the sampling column, a guide pipe arranged at the air outlet of the compressed gas cylinder, and a valve arranged on the guide pipe; the guide pipe is communicated with the driving tube.

[0010] Further, there are a pair of guide pipes, and the pair of guide pipes are both communicated with the driving tube; when the compressed gas cylinder does not supply gas to the driving tube, one of the guide pipes is arranged above the counterweight block, and the other guide pipe is arranged below the counterweight block.

[0011] Further, a limiting ring is fixedly arranged at the upper end inside the driving tube, a sliding block is arranged above the limiting ring, and a top rod is fixedly arranged above the sliding block; the top rod penetrates through the upper end of the driving tube and extends outwards, and the sliding block is located above the sliding tube; one end of the sliding rod inside the sliding tube is provided with a horizontally arranged pull rod, and one end of the pull rod away from the sliding rod is provided with a horizontally arranged collar; when the compressed gas cylinder does not supply gas to the driving tube, the centers of the pair of collars are both located on the axis of the driving tube; the upper end of the top rod penetrates through the lower wall of the driving tube above it and is arranged in the driving tube, and the sliding block and the upper end of the driving tube are magnetically connected; when the driving tube where the sliding block is located does not receive the gas supply from the compressed gas cylinder, the top rod on the sliding block is located below the pair of collars; when the driving tube where the sliding block is located receives the gas supply from the compressed gas cylinder, the top rod on the sliding block is inserted into the pair of collars.

[0012] Further, a cover plate is fixedly provided on the side of the second connecting plate away from the sampling column; when the sampling box approaches the sampling column, the cover plate covers the opening side of the sampling box.

[0013] Further, the sampling box is a vertically arranged flat structure, the side of the sampling box away from the sampling column is arc-shaped, and a cutting edge is provided at the upper end of the side of the sampling box away from the sampling column.

[0014] Further, a hanging ring is provided at the upper end of the sampling column, one side of the sampling column is an opening side, and a sealing plate is hingedly provided on the opening side of the sampling column.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: In the geotechnical exploration sampling device of the present invention, when in use, the connecting rope is fixed on the sampling column, and then the sampling column is sent into a pre-drilled borehole. When the sampling column reaches the deepest part, it starts to be pulled up. During the upward pulling process, when reaching the depth where sampling is required, the sampler is driven to unfold by the driving device, that is, the first connecting plate and the second connecting plate are pushed to rotate outward around the rotating shaft, so that the sampling box moves away from the sampling column and abuts against the inner wall of the borehole. During the whole process, the sampling column does not stop rising. Therefore, when the sampling box is attached to the inner wall of the borehole, a part of the geotechnical material on the inner wall of the borehole will be scraped off and collected in the sampling box, and then the sampling box is arranged close to the sampling column under the action of the first connecting plate and the second connecting plate. When moving to different depths, different sampling components can be used for sampling, and the operation method is exactly the same. Therefore, through this device, geotechnical samples at different depths can be accurately sampled at one time, and geotechnical samples at extremely deep depths can also be sampled, which can effectively improve the sampling efficiency of multi-depth samples and reduce the time consumed in the sampling process. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the geotechnical exploration sampling device provided by the embodiment of the present invention; Figure 2 It is a schematic structural diagram of the interior of the geotechnical exploration sampling device provided by the embodiment of the present invention; Figure 3 It is a schematic structural diagram of one perspective after the sampler of the embodiment of the present invention is unfolded; Figure 4 It is a schematic structural diagram of a second perspective after the sampler of the embodiment of the present invention is unfolded; Figure 5 It is a schematic structural diagram of the interior after the sampler of the embodiment of the present invention is unfolded; Figure 6 It is a schematic structural diagram of one state of the ejector rod provided by the embodiment of the present invention; Figure 7 It is a schematic structural diagram of a second state of the ejector rod provided by the embodiment of the present invention; Figure 8 For Figure 2 An enlarged view of part A in

[0017] Icon: 10 - Sampling column, 11 - Sealing plate, 12 - Hanging ring, 20 - Sampler, 21 - First connecting plate, 22 - Second connecting plate, 23 - Sampling box, 24 - Rotating shaft, 25 - Cover plate, 26 - First through hole, 30 - Driving device, 31 - Driving tube, 32 - Slide tube, 33 - Slide rod, 34 - Pushing rod, 35 - Counterweight, 36 - Pulling rope, 37 - Compressed gas cylinder, 38 - Air duct, 39 - Spring, 310 - Air release valve, 311 - Limiting ring, 312 - Slide block, 313 - Thrust rod, 314 - Pull rod, 315 - Collar, 316 - Second through hole. Detailed implementation mode

[0018] Embodiment The following is further described in conjunction with specific embodiments. As shown in the attached Figure 1 - attached Figure 8 As shown, the geotechnical exploration sampling device of this embodiment includes a vertically arranged and hollow sampling column 10, and a plurality of sampling components arranged on the sampling column 10; the plurality of sampling components are distributed in the vertical direction; the sampling component includes a pair of samplers 20 respectively arranged on opposite sides of the sampling column 10, and a driving device 30 arranged inside the sampling column 10; the sampler 20 includes a first connecting plate 21 hinged to the outer wall of the sampling column 10, a second connecting plate 22 hinged to the outer wall of the sampling column 10, and a sampling box 23 simultaneously hinged to the first connecting plate 21 and the second connecting plate 22; the second connecting plate 22 is arranged above the first connecting plate 21, the first connecting plate 21 and the second connecting plate 22 are equal in length and parallel to each other, and the sampling box 23 is arranged with the opening facing upwards; the first connecting plate 21 is hinged to the outer wall of the sampling column 10 through a horizontally arranged rotating shaft 24, and the driving device 30 is used to drive the first connecting plate 21 to rotate around the rotating shaft 24. Specifically, when in use, the connecting rope is fixed on the sampling column 10, and then the sampling column 10 is sent into a pre - drilled hole. When the sampling column 10 reaches the deepest point, start pulling it upwards. During the upward pulling process, when reaching the depth where sampling is required, the driving device 30 drives the sampler 20 to unfold, that is, pushes the first connecting plate 21 and the second connecting plate 22 to rotate outwards around the rotating shaft 24, so that the sampling box 23 moves away from the sampling column 10 and abuts against the inner wall of the hole (as shown in the attached Figure 3 - attached Figure 5As shown in the figure, the sampling column 10 does not stop rising during the whole process. Therefore, when the sampling box 23 is attached to the inner wall of the borehole, a part of the rock and soil on the inner wall of the borehole will be scraped off and collected in the sampling box 23. Then, under the action of the first connecting plate 21 and the second connecting plate 22, the sampling box 23 is arranged close to the sampling column 10. When moving to different depths, different sampling components can be used for sampling, and the operation method is exactly the same. Therefore, through this device, rock and soil samples at different depths can be accurately sampled at one time, and rock and soil samples at extremely deep depths can also be sampled, which can effectively improve the sampling efficiency of multi-depth samples and reduce the time consumed in the sampling process. It should be noted that the outer wall of the sampling column 10, the first connecting plate 21, the second connecting plate 22 and the sampling box 23 form a parallelogram structure, which can keep the sampling box 23 stable all the time and can better contact with the hole wall for sampling. The driving device 30 can be remotely controlled manually (such as wired or wireless connection control), or started regularly (the speed of the connecting rope needs to be controlled), or started by air pressure (the air pressure at different depths is different). And this device is preferably used for sampling soft soil layers. For pure rock samples with very hard geology, it may not be possible to obtain enough samples. Therefore, it is recommended to first use the seismic survey method to conduct a preliminary survey of the geology, and then determine whether to choose to use this device for sampling according to the actual situation.

[0019] The driving device 30 in this embodiment includes a driving tube 31 vertically arranged inside the sampling column 10 with both ends sealed, a gas supply device communicated with the driving tube 31, a pressure relief valve 310 arranged on the driving tube 31, a sliding tube 32 horizontally arranged and communicated with the side of the driving tube 31, a sliding rod 33 hermetically slidably arranged inside the sliding tube 32, and a lever 34 horizontally arranged at one end of the sliding rod 33 outside the sampling column 10; the sliding rod 33 penetrates through the side wall of the sampling column 10; the first connecting plate 21 is of a hollow structure, and a first through hole 26 is opened on one side of the first connecting plate 21 close to the sampling column 10; the sliding rod 33 is arranged through the first through hole 26, and the lever 34 is arranged inside the first connecting plate 21. Specifically, the gas supply device can instantaneously provide a large amount of compressed gas, and the gas quickly fills the driving tube 31 and pushes the sliding rod 33 to move in the sliding tube 32. The sliding rod 33 pushes the first connecting plate 21 to rotate around the rotating shaft 24 through the lever 34, so as to push the sampling box 23 to the hole wall. When the sampling box 23 contacts the hole wall, at this time the sampling column 10 is still in the rising state. Therefore, within a short period of time when the sampling box 23 contacts the hole wall and moves upward, the sampling box 23 will continuously scrape the geotechnical samples on the hole wall and collect them into the sampling box 23. The gas supply device only provides high-pressure gas for a short period of time. Therefore, the gas in the driving tube 31 and the sliding tube 32 will gradually and slowly be discharged through the pressure relief valve 310. At this time, the sampling box 23, the first connecting plate 21 and the second connecting plate 22 will slowly descend under their own gravity, and the sampling box 23 gradually moves away from the hole wall (sampling cannot be performed at this time). Finally, the sampling box 23 returns to the previous position (close to the sampling column 10), and the sampling operation is completed.

[0020] The driving device 30 in this embodiment further includes a counterweight 35 slidably arranged inside the driving tube 31, a second through hole 316 opened on the counterweight 35, and a pair of pull ropes 36 arranged on the upper side of the counterweight 35; the pair of pull ropes 36 are respectively connected with the pair of sliding rods 33. Specifically, the counterweight 35 can pull the sliding rod 33 through the pull ropes 36, so that the first connecting plate 21, the second connecting plate 22 and the sampling box 23 can return to the position before sampling (i.e., close to the sampling column 10) faster, which can avoid the sampling box 23 contacting the hole wall for a long time during the process of pulling the sampling column 10 to rise, thus affecting the movement of the sampling column 10.

[0021] The driving device 30 in this embodiment further includes a spring 39 arranged under the counterweight 35; the upper end of the spring 39 is connected with the counterweight 35, and the lower end of the spring 39 is connected with the inner bottom wall of the driving tube 31. Specifically, the spring 39 and the counterweight 35 cooperate to improve the falling speed of the sampling box 23.

[0022] The gas supply device in this embodiment includes a compressed gas cylinder 37 disposed inside the sampling column 10, a gas guide pipe 38 disposed at the gas outlet of the compressed gas cylinder 37, and a valve disposed on the gas guide pipe 38; the gas guide pipe 38 is communicated with the driving pipe 31. There are a pair of gas guide pipes 38, and both pairs of gas guide pipes 38 are communicated with the driving pipe 31; when the compressed gas cylinder 37 does not supply gas to the driving pipe 31, one gas guide pipe 38 is disposed above the counterweight 35, and the other gas guide pipe 38 is disposed below the counterweight 35. Specifically, storing high-pressure gas in the compressed gas cylinder 37 can more effectively provide instantaneous high-pressure gas for the driving pipe 31. The opening time of the valve can be preset, and the activation of the valve can be completed by manual remote operation. The reason for arranging the gas guide pipes 38 on both the upper and lower sides of the counterweight 35 is that if the gas guide pipe 38 is only arranged above the counterweight 35, the gas entering the driving pipe 31 from the gas guide pipe 38 will exert a downward force on the counterweight 35. Although this force can be weakened through the second through hole 316, it will still generate a reverse pulling force on the movement of the sliding rod 33, which is not conducive to the sliding rod 33 pushing the sampling box 23 to unfold. Therefore, a gas guide pipe 38 is arranged below the counterweight 35. By introducing some gas below the gas guide pipe 38, the counterweight 35 can be pushed upward, so that the reverse pulling force of the counterweight 35 on the movement of the sliding rod 33 is significantly reduced or even disappears.

[0023] Inside the upper end of the driving pipe 31 in this embodiment, a limiting ring 311 is fixedly arranged. Above the limiting ring 311, a slider 312 is arranged. Above the slider 312, a top rod 313 is fixedly arranged; the top rod 313 passes through the upper end of the driving pipe 31 and extends outward. The slider 312 is located above the sliding pipe 32; at one end of the sliding rod 33 located inside the sliding pipe 32, a horizontally arranged pull rod 314 is provided. At the end of the pull rod 314 away from the sliding rod 33, a horizontally arranged collar 315 is provided; when the compressed gas cylinder 37 does not supply gas to the driving pipe 31, the centers of the pair of collars 315 are both located on the axis of the driving pipe 31; the upper end of the top rod 313 passes through the lower end wall of the driving pipe 31 above it and is arranged in the driving pipe 31. The slider 312 and the upper end of the driving pipe 31 are magnetically connected; when the driving pipe 31 where the slider 312 is located does not receive gas supply from the compressed gas cylinder 37, the top rod 313 on the slider 312 is located below the pair of collars 315; when the driving pipe 31 where the slider 312 is located receives gas supply from the compressed gas cylinder 37, the top rod 313 on the slider 312 is inserted into the pair of collars 315. Specifically, during the sampling process, the uppermost sampling assembly samples first, and then the lower sampling assemblies sample in sequence. After the uppermost sampling assembly finishes sampling, under the pulling force of the counterweight 35 and the spring 39, the sliding rod 33 returns to the position before sampling. At this time, the pair of collars 315 on the pair of sliding rods 33 are inside the driving pipe 31 (as shown in the appendix Figure 6As shown, after a certain period of time, the sampling component below starts sampling. During the sampling process, the compressed gas cylinder 37 fills high-pressure gas into the drive pipe 31. This gas not only pushes the slide bar 33 to move, but also pushes the slider 312 and the ejector rod 313 located above the slide bar 33. The upper end of the ejector rod 313 is located in the drive pipe 31 above it. After the ejector rod 313 moves upward, it will insert into the collar 315 in the sampling component above it (as shown in the appendix Figure 7 As shown), at this time, the slider 312 and the upper end of the drive pipe 31 are attracted together under the action of magnetic force. The slider 312 and the ejector rod 313 will not move downward. Since the ejector rod 313 is inserted into a pair of collars 315, the collars 315 cannot move horizontally anymore, that is, the pull rod 314, the slide bar 33, and the lever 34 cannot move anymore. In this way, by restricting the sampling component above it with the sampling component below, it is ensured that the sampling box 23 in the sampled sampling component will not be affected by various collisions during the upward movement of the sampling column 10 and thus will not unfold, ensuring the normal upward movement of the sampling column 10, preventing it from getting stuck in the drill hole, and also avoiding the situation where the sample in the sampling box 23 spills out.

[0024] On the side of the second connecting plate 22 away from the sampling column 10 in this embodiment, a cover plate 25 is fixedly provided; when the sampling box 23 approaches the sampling column 10, the cover plate 25 covers the opening side of the sampling box 23. Specifically, after sampling, the cover plate 25 can cover the sampling box 23 to prevent the sample from spilling out.

[0025] The sampling box 23 in this embodiment is a vertically arranged flat structure. The side of the sampling box 23 away from the sampling column 10 is arc-shaped, and a cutting edge is provided at the upper end of the side of the sampling box 23 away from the sampling column 10. Specifically, in this way, the sampling box 23 can better fit on the hole wall and effectively scrape the geotechnical samples on the hole wall into the sampling box 23 only.

[0026] At the upper end of the sampling column 10 in this embodiment, a hanging ring 12 is provided. One side of the sampling column 10 is an open side, and a sealing plate 11 is hinged to the open side of the sampling column 10. Specifically, a connecting rope can be connected through the hanging ring 12. The drive device 30 inside the sampling column 10 can be reset by opening the sealing plate 11, such as pulling the ejector rod 313 downward to replenish the compressed gas cylinder 37 with gas, etc.

[0027] In summary, for the geotechnical exploration sampling device of this embodiment, during use, the connecting rope is fixed on the sampling column 10, and then the sampling column 10 is sent into a pre-drilled borehole. When the sampling column 10 reaches the deepest point, it starts to be pulled upwards. During the upward pulling process, when reaching the depth where sampling is required, the sampler 20 is driven to expand by the driving device 30, that is, the first connecting plate 21 and the second connecting plate 22 are pushed to rotate outwards around the rotating shaft 24, so that the sampling box 23 moves away from the sampling column 10 and abuts against the inner wall of the borehole. During the whole process, the sampling column 10 does not stop rising. Therefore, when the sampling box 23 is attached to the inner wall of the borehole, a part of the geotechnical material on the inner wall of the borehole will be scraped off and collected in the sampling box 23, and then the sampling box 23 is arranged close to the sampling column 10 under the action of the first connecting plate 21 and the second connecting plate 22. When moving to different depths, different sampling components can be used for sampling, and the operation method is exactly the same. Therefore, through this device, geotechnical samples at different depths can be accurately sampled at one time, and geotechnical samples at extremely deep depths can also be sampled, which can effectively improve the sampling efficiency of samples at multiple depths and reduce the time consumed in the sampling process.

[0028] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A geotechnical survey sampling device, characterized in that: It comprises a vertically arranged and hollow sampling column (10), and a plurality of sampling components arranged on the sampling column (10); the plurality of sampling components are distributed along the vertical direction; The sampling assembly comprises a pair of samplers (20) respectively arranged on opposite sides of the sampling column (10), and a driving device (30) arranged inside the sampling column (10); The sampler (20) comprises a first connecting plate (21) hinged to the outer wall of the sampling column (10), a second connecting plate (22) hinged to the outer wall of the sampling column (10), and a sampling box (23) hinged to both the first connecting plate (21) and the second connecting plate (22); the second connecting plate (22) is arranged above the first connecting plate (21); the first connecting plate (21) and the second connecting plate (22) are of equal length and parallel to each other; the sampling box (23) is arranged with its opening facing upward; The first connecting plate (21) is hingedly connected to the outer wall of the sampling column (10) via a horizontally arranged rotating shaft (24), and the driving device (30) is used to drive the first connecting plate (21) to rotate with the rotating shaft (24) as the center.

2. The geotechnical survey sampling device according to claim 1, characterized in that: The driving device (30) comprises a driving tube (31) vertically arranged in the sampling column (10) and sealed at both ends, an air supply device connected to the driving tube (31), an air release valve (310) arranged on the driving tube (31), a sliding tube (32) horizontally arranged and connected to the side of the driving tube (31), a sliding rod (33) sealingly slidingly arranged in the sliding tube (32), and a lever (34) horizontally arranged on the sliding rod (33) and located at one end outside the sampling column (10); the sliding rod (33) passes through the side wall of the sampling column (10); The first connecting plate (21) is a hollow structure, and a first through hole (26) is provided on a side of the first connecting plate (21) close to the sampling column (10); the sliding rod (33) is arranged through the first through hole (26), and the shifting rod (34) is arranged inside the first connecting plate (21).

3. The geotechnical survey sampling device according to claim 2, characterized in that: The driving device (30) further comprises a counterweight block (35) slidably disposed in the driving tube (31), a second through hole (316) provided on the counterweight block (35), and a pair of pull ropes (36) disposed on the upper side of the counterweight block (35); the pair of pull ropes (36) are respectively connected to the pair of sliding rods (33).

4. The geotechnical survey sampling device according to claim 3, characterized in that: The driving device (30) further comprises a spring (39) arranged at the lower side of the counterweight block (35); the upper end of the spring (39) is connected to the counterweight block (35), and the lower end of the spring (39) is connected to the inner bottom wall of the driving tube (31).

5. The geotechnical survey sampling device according to claim 3, characterized in that: The gas supply device comprises a compressed gas cylinder (37) arranged inside the sampling column (10), an air guide pipe (38) arranged at the gas outlet of the compressed gas cylinder (37), and a valve arranged on the air guide pipe (38); the air guide pipe (38) is connected to the driving pipe (31).

6. The geotechnical survey sampling device according to claim 5, characterized in that: A pair of the air guide tubes (38) are provided, and both of the pair of air guide tubes (38) are connected to the driving tube (31); When the compressed gas cylinder (37) does not supply gas to the driving tube (31), one of the air guide tubes (38) is arranged above the counterweight block (35), and the other of the air guide tubes (38) is arranged below the counterweight block (35).

7. The geotechnical survey sampling device according to claim 6, characterized in that: A limiting ring (311) is fixedly provided at the upper end of the interior of the driving tube (31), a sliding block (312) is provided on the upper side of the limiting ring (311), and a push rod (313) is fixedly provided on the upper side of the sliding block (312); the push rod (313) passes through the upper end of the driving tube (31) and extends outwards, and the sliding block (312) is located above the sliding tube (32); A horizontally arranged pull rod (314) is provided at one end of the slide rod (33) located inside the slide tube (32), and a horizontally arranged collar (315) is provided at one end of the pull rod (314) away from the slide rod (33); when the compressed gas cylinder (37) does not supply gas to the drive tube (31), the centers of the circles of the pair of collars (315) are both located on the axis of the drive tube (31); The upper end of the push rod (313) passes through the lower end wall of the driving tube (31) located above it and is arranged in the driving tube (31), and the sliding block (312) is connected to the upper end of the driving tube (31) by magnetic attraction; When the driving tube (31) where the slider (312) is located is not supplied with gas from the compressed gas cylinder (37), the push rod (313) on the slider (312) is located at the lower side of the pair of rings (315); when the driving tube (31) where the slider (312) is located is supplied with gas from the compressed gas cylinder (37), the push rod (313) on the slider (312) is inserted into the pair of rings (315).

8. The geotechnical survey sampling device according to claim 1, characterized in that: A cover plate (25) is fixedly provided on the side of the second connecting plate (22) away from the sampling column (10); when the sampling box (23) is close to the sampling column (10), the cover plate (25) covers the opening side of the sampling box (23).

9. The geotechnical survey sampling device according to claim 1, characterized in that: The sampling box (23) is a flat structure arranged vertically, and the side of the sampling box (23) away from the sampling column (10) is arc-shaped, and the upper end of the side of the sampling box (23) away from the sampling column (10) is provided with a cutting edge.

10. The geotechnical survey sampling device according to claim 1, characterized in that: A hanging ring (12) is provided at the upper end of the sampling column (10); one side of the sampling column (10) is an open side; and a sealing plate (11) is hingedly provided on the open side of the sampling column (10).

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