Sampling method for geological and geotechnical investigation strength test

Abstract

The invention relates to the related technical field of geological mineral products, in particular to a geological geotechnical investigation strength test sampling method, a conical drill bit is arranged at the end of a sampling rod, and a conical combined plugging piece is in threaded connection with an inner cavity of the conical drill bit in the axial direction of the sampling rod; the movement of the plugging piece is driven by a control mechanism arranged in the inner cavity of the sampling rod; the device further comprises a clamping piece arranged in an inner cavity of the control mechanism, when the plugging piece moves upwards relative to the conical drill bit, a through groove allowing the clamping piece to move is formed in the end of the conical drill bit, and after the through groove allowing the clamping piece to move is formed in the end, penetrating into the earth surface, of the conical drill bit, the clamping piece is controlled to move downwards and conduct clamping; the rock-soil sampling device can be used for sampling rock-soil at different depths, rock-soil at the specified depth can be accurately sampled in the sampling process, surface rock-soil and deep rock-soil are prevented from being mixed together in the drilling process, and the accuracy of a strength test result is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of geology and mineral resources, and specifically to a sampling method for geological geotechnical exploration strength test. Background Art

[0002] Geotechnical strength exploration tests are generally carried out for the purpose of mineral exploitation, and are the general term for various tests on rocks and soils.

[0003] Geotechnical exploration test projects play a crucial role in mineral exploitation, which is mainly reflected in the following aspects: ‌Mine safety and stability‌: Geotechnical engineering research can help evaluate and predict the geological conditions of mines, ensuring the stability and safety of mines. Through geotechnical exploration, geological environment data of mine slopes can be obtained, and effective treatment measures can be formulated to improve the stability and strength of slopes, reducing the occurrence of geological disasters such as landslides and collapses.

[0004] ‌Optimizing mine design‌: During the mine design and operation process, geotechnical engineers can provide ground engineering support to help optimize mine design and reduce unnecessary waste and risks. For example, in open-pit mining, the design of the slope angle directly affects the ore extraction efficiency and cost. Geotechnical engineers can determine the optimal slope angle through rock mechanics principles, thereby improving the economic benefits of the mine.

[0005] ‌Coping with complex geological conditions‌: After the exploitation of mineral resources, the geological environment will change significantly, and the geotechnical stability and strength of slopes may decrease, making it easy to occur geological disasters such as landslides, collapses, and debris flows. Through geotechnical exploration and treatment, the occurrence frequency of these disasters can be effectively reduced, ensuring the safety environment of mining operations. Specifically, it is divided into sampling tests for separating geotechnical specimens from the parent body and in-situ tests directly carried out on the geotechnical body. In geological geotechnical exploration, geotechnical sampling is required before the strength test. The collection of geotechnical samples is an important link in geotechnical engineering exploration, which provides basic data and materials for subsequent laboratory tests and field tests.

[0006] Existing geotechnical sampling devices generally use the method of drilling with a conical drill bit. While the motor and hydraulic rod control the drill bit to descend, it rotates at high speed to break through the rock layer surface. When facing sampling requirements at different depths, the drilling method of the drill bit is likely to mix the geotechnical materials on the surface of the geotechnical body with those in the deep layer, resulting in the inability to distinguish the sampled geotechnical materials, and there is a possibility of errors in the geotechnical strength test. Summary of the Invention

[0007] The purpose of the present invention is to provide a sampling method for geological geotechnical exploration strength test to solve the problems raised in the above background art.

[0008] To achieve the above object, the present invention provides the following technical solutions: A sampling method for geological geotechnical exploration strength test, comprising the following steps: Step 1: Determine the sampling area according to needs; Step 2: Use a sampling device to obtain geotechnical samples at different depths in the specified sampling area; Step 3: Conduct physical property tests and chemical composition analyses on the collected geotechnical samples; Step 4: Use a laboratory testing method to conduct compression tests and shear tests on the geotechnical samples to obtain soil mechanical parameters.

[0009] For the sampling method for geological geotechnical exploration strength test as described above: When the sampling device samples, according to different drilling depths, geotechnical materials at different depths can be obtained, and the mixing of surface and deep geotechnical materials in the sample is avoided during sampling.

[0010] For the sampling method for geological geotechnical exploration strength test as described above: The sampling device includes a receiving seat, a rotating cylinder is rotatably provided on the receiving seat, and when the rotating cylinder rotates, it can control the sampling rod arranged inside the rotating cylinder to move downward for drilling operations; For the sampling method for geological geotechnical exploration strength test as described above: A conical drill bit is provided at the end of the sampling rod, a plugging member in a conical combination is threadedly connected along the axial direction of the sampling rod inside the cavity of the conical drill bit, and the movement of the plugging member is driven by a control mechanism arranged inside the cavity of the sampling rod; It further includes a clamping member arranged inside the control mechanism. When the plugging member moves upward relative to the conical drill bit, a through groove for the clamping member to move is formed at the end of the conical drill bit.

[0011] For the sampling method for geological geotechnical exploration strength test as described above: The rotating cylinder is rotationally connected to a first driving shaft rotatably arranged on the receiving seat through a first gear set, and the first driving shaft is driven to rotate by a first motor fixedly installed on the receiving seat.

[0012] For the sampling method for geological geotechnical exploration strength test as described above: A first lead screw fixedly connected to the receiving seat is arranged inside the rotating cylinder, the first lead screw is arranged along the axial direction of the rotating cylinder and is threadedly connected to the sampling rod.

[0013] For the sampling method for geological geotechnical exploration strength test as described above: The control mechanism includes a telescopic cylinder rotatably arranged on the receiving seat, the telescopic cylinder is arranged along the axial direction of the sampling rod and is rotationally connected to the sampling rod, and a positioning cylinder that always abuts against the plugging member is arranged at the end of the telescopic cylinder; It further includes a limiting cylinder slidably arranged at the end of the telescopic cylinder, and a plurality of protrusions respectively fixed to the plugging member are arranged radially on the limiting cylinder.

[0014] The geological and geotechnical exploration strength test sampling method as described above: The telescopic cylinder includes a fixed cylinder and a movable rod slidably connected to the fixed cylinder. The fixed cylinder is rotatably connected to the receiving seat. One end of the movable rod away from the fixed cylinder is rotatably connected to the sampling rod. The fixed cylinder is rotatably connected to a second drive shaft rotatably provided on the receiving seat through a second gear set, and the second drive shaft is driven to rotate by a second motor fixedly installed on the receiving seat.

[0015] The geological and geotechnical exploration strength test sampling method as described above: The clamping member includes a screw rod. A plurality of clamping jaws are radially provided at the end of the screw rod. The clamping jaws are hinged to a threaded sleeve threadedly installed on the screw rod through a connecting rod. The lifting and rotation of the screw rod are controlled by a pushing member provided inside the telescopic cylinder.

[0016] The geological and geotechnical exploration strength test sampling method as described above: The pushing member includes a plugging cylinder provided inside the telescopic cylinder and rotatably connected to the receiving seat. A plugging rod is slidably provided at the end of the plugging cylinder. One end of the plugging rod away from the plugging cylinder is fixed to the screw rod; It further includes a connecting cylinder provided inside the plugging cylinder and rotatably connected to the receiving seat. A chute is formed inside the connecting cylinder. A lifting rod is arranged along the axial direction of the connecting cylinder. A first ball adapted to the chute is movably provided on the inner wall of the lifting rod; The rotation of the plugging cylinder and the connecting cylinder is respectively controlled by an intermittent driving member provided on the receiving seat.

[0017] The geological and geotechnical exploration strength test sampling method as described above: The intermittent driving member includes a first drive shaft and a second drive shaft rotatably provided on the receiving seat. The first drive shaft is connected to the connecting cylinder through a first bevel gear set. The second drive shaft is connected to the plugging cylinder through a second bevel gear set; It further includes a second lead screw rotatably provided on the receiving seat. The rotation of the second lead screw is driven by a third motor fixedly provided on the receiving seat. A connecting hoop threadedly connected to the second lead screw is sleeved on the first drive shaft and the second drive shaft.

[0018] Compared with the prior art, the beneficial effects of the present invention are: By controlling the rotation of the rotary drum, the sampling rod is driven to descend and rotate to break through the surface layer of rock and soil. The drilling depth of the sampling rod is adjusted according to different rotation frequencies. During the process of drilling soil, when the drilling work stops, the drive control mechanism works to drive the sealing member to rotate relative to the conical drill bit, and the sealing member retracts into the conical drill bit. After a through groove for the clamping member to move is formed at the end of the conical drill bit, the clamping member is controlled to move down to the position of the through groove, and then the clamping member performs a clamping action to achieve sampling of rock and soil at different depths. Moreover, during the sampling process, the rock and soil at the specified depth can be accurately sampled, avoiding the mixing of surface rock and soil and deep rock and soil during the drilling process, and further increasing the accuracy of the strength test results. Description of the Drawings

[0019] Figure 1 It is a schematic flow chart of the sampling method for the strength test of geological rock and soil exploration.

[0020] Figure 2 It is a schematic structural diagram in the sampling method for the strength test of geological rock and soil exploration.

[0021] Figure 3 It is a schematic structural diagram of the rotary drum and the sampling rod in the sampling method for the strength test of geological rock and soil exploration.

[0022] Figure 4 It is a schematic structural diagram of the first lead screw and the sampling rod in the sampling method for the strength test of geological rock and soil exploration.

[0023] Figure 5 It is a schematic structural diagram of the sampling rod and the conical drill bit in the sampling method for the strength test of geological rock and soil exploration.

[0024] Figure 6 It is a schematic structural diagram of the drill-shaped drill bit and the sealing member in the sampling method for the strength test of geological rock and soil exploration.

[0025] Figure 7 It is a schematic structural diagram of the clamping member in the sampling method for the strength test of geological rock and soil exploration.

[0026] Figure 8 It is a schematic structural diagram of the pushing member in the sampling method for the strength test of geological rock and soil exploration.

[0027] Figure 9 It is a schematic structural diagram of the connecting cylinder and the lifting rod in the sampling method for the strength test of geological rock and soil exploration.

[0028] Figure 10 It is a schematic structural diagram of the rotary drum and the telescopic cylinder in the sampling method for the strength test of geological rock and soil exploration.

[0029] Figure 11 It is a schematic structural diagram of the intermittent driving member in the sampling method for the strength test of geological rock and soil exploration.

[0030] In the figure: 1. Connecting seat; 2. Rotary drum; 201. Guide block; 3. First lead screw; 4. Sampling rod; 401. Guide groove; 5. Tapered drill bit; 6. Plugging plate; 7. Telescopic cylinder; 8. Limiting cylinder; 801. Protrusion; 9. Positioning cylinder; 10. Inserting rod; 11. Inserting cylinder; 12. Screw; 13. Threaded sleeve; 14. Connecting rod; 15. Claw; 16. Guide rod; 17. Lifting rod; 1701. First ball; 18. Connecting cylinder; 1801. Chute; 19. First motor; 20. Second motor; 21. First drive shaft; 22. First gear set; 23. Second drive shaft; 24. Second gear set; 25. Third motor; 26. Second lead screw; 27. First transmission shaft; 2701. First limiting groove; 28. Second transmission shaft; 2801. Second limiting groove; 29. Connecting hoop; 30. First bevel gear set; 31. Second bevel gear set. Detailed implementation manners

[0031] The following will describe various exemplary embodiments, features, and aspects of the present application in detail with reference to the drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0032] The special term "exemplary" herein means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" herein does not have to be construed as superior to or better than other embodiments.

[0033] In addition, for better illustration of the present application, numerous specific details are given in the following detailed embodiments. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some instances, methods, means, and elements well known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0034] Please refer to Figures 1 to 11 , in an embodiment of the present invention, a method for sampling the strength test of geological rock and soil includes the following steps: Step 1: Determine the sampling area according to needs; Step 2: Use the sampling device to obtain rock and soil samples at different depths in the specified sampling area; Step 3: Conduct physical property tests and chemical composition analyses on the collected rock and soil samples; Step 4: Conduct compression tests and shear tests on the rock and soil samples by using chemical analysis methods to obtain soil mechanical parameters.

[0035] When the sampling device samples, different depths of rock and soil can be obtained according to different drilling depths, and the mixing of surface and deep rock and soil in the sample during sampling can be avoided.

[0036] The sampling device includes a receiving seat 1, a rotating cylinder 2 is rotatably arranged on the receiving seat 1, and when the rotating cylinder 2 rotates, it can control the sampling rod 4 arranged inside the rotating cylinder 2 to move downward for drilling operation; A conical drill bit 5 is arranged at the end of the sampling rod 4, a plugging member in a conical combination is threadedly connected along the axial direction of the sampling rod 4 in the inner cavity of the conical drill bit 5, and the movement of the plugging member is driven by a control mechanism arranged in the inner cavity of the sampling rod 4; It further includes a clamping member arranged in the inner cavity of the control mechanism. When the plugging member moves upward relative to the conical drill bit 5, a through groove for the clamping member to move is formed at the end of the conical drill bit 5.

[0037] Specifically, when formally drilling the rock and soil, by controlling the rotation of the rotating cylinder 2, the sampling rod 4 is driven to descend and rotate to break the surface layer of the rock and soil. According to different rotation frequencies, the drilling depth of the sampling rod 4 is adjusted. During the process of drilling soil, when the drilling work stops, the control mechanism is driven to work, driving the plugging member to rotate relative to the conical drill bit 5, and the plugging member retracts into the conical drill bit 5. After a through groove for the clamping member to move is formed at the end of the conical drill bit 5, the clamping member is controlled to move downward to the position of the through groove, and then the clamping member performs a clamping action to realize the sampling of rock and soil at different depths, and during the sampling process, the rock and soil at the specified depth can be accurately sampled, avoiding the mixing of surface rock and soil and deep rock and soil during the drilling process, and further increasing the accuracy of the strength test results.

[0038] As a further solution of the present invention, please refer to Figure 2 and Figure 3 , the rotating cylinder 2 is rotationally connected to a first driving shaft 21 rotatably arranged on the receiving seat 1 through a first gear set 22, and the first driving shaft 21 is driven to rotate by a first motor 19 fixedly installed on the receiving seat 1.

[0039] A first lead screw 3 fixedly connected to the receiving seat 1 is arranged in the rotating cylinder 2. The first lead screw 3 is arranged along the axial direction of the rotating cylinder 2 and is threadedly connected to the sampling rod 4.

[0040] Preferably, at least one set of guide blocks 201 are formed on the inner wall of the rotating cylinder 2, and guide grooves 401 slidably matched with the guide blocks 201 are arranged on the sampling rod 4.

[0041] When drilling in the soil, the first motor 19 is started to work. The output shaft of the first motor 19 is fixedly connected to the first drive shaft 21 to meet the requirement of the rotation of the first drive shaft 21. When the first drive shaft 21 rotates, under the transmission of the first gear set 22, the rotating cylinder 2 is driven to rotate. Under the action of the guide groove 401 and the guide block 201, when the rotating cylinder 2 rotates, the sampling rod 4 is driven to rotate synchronously. In cooperation with the threaded connection between the sampling rod 4 and the first lead screw 3, when the rotating cylinder 2 rotates, the sampling rod 4 is driven to rotate and move up and down synchronously.

[0042] As a further solution of the present invention, please refer to Figure 3 and Figure 5 , the control mechanism includes a telescopic cylinder 7 rotatably arranged on the receiving seat 1. The telescopic cylinder 7 is arranged along the axial direction of the sampling rod 4 and is rotatably connected to the sampling rod 4. A positioning cylinder 9 that always abuts against a plurality of the blocking members is arranged at the end of the telescopic cylinder 7; It further includes a limiting cylinder 8 slidably arranged at the end of the telescopic cylinder 7. A plurality of protrusions 801 respectively fixed to the blocking members are arranged radially on the limiting cylinder 8.

[0043] The telescopic cylinder 7 includes a fixed cylinder and a movable rod slidably connected to the fixed cylinder. The fixed cylinder is rotatably connected to the receiving seat 1. One end of the movable rod away from the fixed cylinder is rotatably connected to the sampling rod 4. The fixed cylinder is rotatably connected to a second drive shaft 23 rotatably arranged on the receiving seat 1 through a second gear set 24, and the second drive shaft 23 is driven to rotate by a second motor 20 fixedly installed on the receiving seat 1.

[0044] Preferably, the blocking members include a plurality of blocking plates 6 respectively threadedly connected to the inner wall of the conical drill bit 5. The plurality of blocking plates 6 are combined into a conical structure and are hollow.

[0045] Preferably, a positioning cylinder 9 is arranged at the end of the telescopic cylinder 7. A circular curved surface arranged in an inclined structure is formed on the positioning cylinder 9, and the inclined curved surface is always in contact with the inner curved surface of the blocking plate 6.

[0046] Specifically, after the sampling rod 4 breaks through the rock and soil and penetrates deep into the ground surface, the first motor 19 stops working. At this time, the second motor 20 is controlled to work. The output shaft of the second motor 20 is fixed to the second drive shaft 23. Thus, when the output shaft rotates, it drives the second drive shaft 23 to rotate synchronously. Under the transmission of the second gear set 24, when the second drive shaft 23 rotates, it drives the telescopic cylinder 7 to rotate synchronously, so that the limiting cylinder 8 drives a plurality of sealing plates 6 to rotate relative to the conical drill bit 5. Under the cooperation of the thread and the thread groove, when the sealing plate 6 rotates relative to the conical drill bit 5, it moves along a direction parallel to the inclined surface, so that the sealing plate 6 always keeps in contact with the inner surface of the conical drill bit 5, ensuring that a through groove for the clamping member to move is formed at the bottom of the conical drill bit 5, which is convenient for the clamping member to sample the rock and soil.

[0047] As a further solution of the present invention, please refer to Figure 7 , the clamping member includes a screw rod 12. A plurality of clamping claws 15 are arranged radially at the end of the screw rod 12. The clamping claws 15 are hinged to a threaded sleeve 13 threadedly installed on the screw rod 12 through a connecting rod 14. The lifting and rotation of the screw rod 12 are controlled by a pushing member arranged on the inner upper part of the telescopic cylinder 7.

[0048] The pushing member includes a plugging cylinder 11 arranged inside the telescopic cylinder 7 and rotatably connected to the receiving seat 1. A plugging rod 10 is slidably arranged at the end of the plugging cylinder 11. One end of the plugging rod 10 away from the plugging cylinder 11 is fixed to the screw rod 12; It further includes a connecting cylinder 18 arranged inside the plugging cylinder 11 and rotatably connected to the receiving seat 1. A chute 1801 is formed inside the connecting cylinder 18. A lifting rod 17 is arranged along the axial direction of the connecting cylinder 18. A first ball 1701 adapted to the chute 1801 is movably arranged on the inner wall of the lifting rod 17; The rotation of the plugging cylinder 11 and the connecting cylinder 18 are respectively controlled by an intermittent driving member arranged on the receiving seat 1.

[0049] Preferably, at least one group of strip-shaped grooves is formed on the inner wall of the plugging cylinder 11. A strip-shaped block slidably matched with the strip-shaped grooves is arranged on the plugging rod 10. Under the limiting action of the strip-shaped grooves and the strip-shaped blocks, the sliding connection between the plugging rod 10 and the plugging cylinder 11 is realized. When the lifting rod 17 performs a lifting action, it drives the plugging rod 10 to move relative to the plugging cylinder 11. When the plugging cylinder 11 rotates, it drives the plugging rod 10 to move along with it without interfering with the lifting rod 17.

[0050] Preferably, at least one group of guide rods 16 fixed to the receiving seat 1 is arranged inside the telescopic cylinder 7. The threaded sleeve 13 is slidably connected to the guide rods 16.

[0051] As a further solution of the present invention, please refer to Figure 10 andFigure 11 The intermittent driving member includes a first transmission shaft 27 and a second transmission shaft 28 rotatably arranged on the receiving seat 1. The first transmission shaft 27 is connected to the connecting cylinder 18 through a first bevel gear set 30, and the second transmission shaft 28 is connected to the plug-in cylinder 11 through a second bevel gear set 31; It further includes a second lead screw 26 rotatably arranged on the receiving seat 1. The rotation of the second lead screw 26 is driven by a third motor 25 fixedly arranged on the receiving seat 1. A connecting hoop 29 threadedly connected to the second lead screw 26 is sleeved on the first transmission shaft 27 and the second transmission shaft 28.

[0052] Preferably, a first limiting groove 2701 is formed on the first transmission shaft 27. The first limiting groove 2701 is divided into an A thread groove, a B horizontal groove, and a C thread groove.

[0053] Preferably, a second limiting groove 2801 is formed on the second transmission shaft 28. The second limiting groove 2801 is divided into a D horizontal groove, an E thread groove, and an F horizontal groove.

[0054] Preferably, three collar rings are formed on the connecting hoop 29. One of the collar rings is threadedly connected to the second lead screw 26. A second ball that is slidably matched with the first limiting groove 2701 is movably arranged on the inner wall of the collar ring sleeved on the first transmission shaft 27, and a third ball that is slidably matched with the second limiting groove 2801 is movably arranged on the inner wall of the collar ring sleeved on the second transmission shaft 28.

[0055] In the initial state, the second ball is located in the A thread groove, and the third ball is located in the D horizontal groove. After a through groove is formed at the bottom of the conical drill bit 5, the third motor 25 is started to work. The output shaft of the third motor 25 is fixed to the second lead screw 26, so that when the output shaft rotates, it drives the second lead screw 26 to rotate synchronously. When the second lead screw 26 rotates, it drives the connecting hoop 29 to perform a linear motion along the direction parallel to the axis of the second lead screw 26, so that the second ball and the third ball move relative to the first transmission shaft 27 and the second transmission shaft 28 respectively. When the second ball moves, it exerts pressure on the A thread groove to drive the first transmission shaft 27 to rotate. At this time, the third ball moves to the D horizontal groove, and the second transmission shaft 28 does not rotate. The connecting hoop 29 continues to move until the second ball moves to the B horizontal groove and the third ball moves to the E thread groove. At this time, the second transmission shaft 28 rotates to meet the intermittent rotation requirements of the first transmission shaft 27 and the second transmission shaft 28.

[0056] When the first transmission shaft 27 rotates, driven by the first bevel gear set 30, the connecting cylinder 18 is driven to rotate synchronously. In cooperation with the transmission between the chute 1801 and the first ball 1701, when the connecting cylinder 18 rotates, the lifting rod 17 moves up and down relative to the connecting cylinder 18. After the clamping jaw 15 moves down to the through groove position, the first transmission shaft 27 stops rotating. At this time, the second transmission shaft 28 rotates. Driven by the second bevel gear set 31, the inserting cylinder 11 and the inserting rod 10 are driven to rotate. At this time, the screw rod 12 rotates relative to the lifting rod 17, so that the threaded sleeve 13 moves linearly along the axial direction of the screw rod 12. When the threaded sleeve 13 moves, under the action of the connecting rod 14, the clamping jaw 15 is squeezed, so that a plurality of clamping jaws 15 perform clamping actions synchronously, so as to realize the sampling of rock and soil, and the rock and soil at a specified depth can be accurately sampled during the sampling process, avoiding the mixing of surface rock and soil and deep rock and soil during the drilling process.

[0057] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. 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 included in the present invention. Any reference signs in the claims should not be construed as limiting the claimed rights.

[0058] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those 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 those skilled in the art.

Claims

1. A sampling method for geological and geotechnical exploration strength tests, characterized in that, It includes the following steps: Step 1: Determine the sampling area according to needs; Step 2: Use the sampling device to obtain geotechnical samples at different depths in the specified sampling area; Step 3: Conduct physical property tests and chemical composition analyses on the collected geotechnical samples; Step 4: Conduct compression tests and shear tests on the geotechnical samples using chemical analysis methods to obtain soil mechanical parameters.

2. The geological and geotechnical exploration strength test sampling method according to claim 1, wherein, When the sampling device samples, according to different drilling depths, it can obtain geotechnical materials at different depths and avoid the mixing of surface and deep geotechnical materials in the sample during sampling.

3. A method for sampling geological and geotechnical exploration strength tests according to claim 1, characterized in that, The sampling device includes a receiving seat (1), a rotating cylinder (2) is rotatably arranged on the receiving seat (1), and when the rotating cylinder (2) rotates, it can control the sampling rod (4) arranged inside the rotating cylinder (2) to move downward for drilling; A conical drill bit (5) is arranged at the end of the sampling rod (4), a plugging member in a conical combination is threadedly connected along the axial direction of the sampling rod (4) in the inner cavity of the conical drill bit (5), and the movement of the plugging member is driven by a control mechanism arranged in the inner cavity of the sampling rod (4); It also includes a clamping member arranged in the inner cavity of the control mechanism. When the plugging member moves upward relative to the conical drill bit (5), a through groove for the clamping member to move is formed at the end of the conical drill bit (5); The control mechanism includes a telescopic cylinder (7) rotatably arranged on the receiving seat (1), the telescopic cylinder (7) is arranged along the axial direction of the sampling rod (4) and is rotatably connected to the sampling rod (4), and a positioning cylinder (9) that always abuts against the plugging member is arranged at the end of the telescopic cylinder (7); It also includes a limiting cylinder (8) slidably arranged at the end of the telescopic cylinder (7), and a plurality of protrusions (801) respectively fixed to the plugging member are arranged radially on the limiting cylinder (8); The telescopic cylinder (7) includes a fixed cylinder and a movable rod slidably connected to the fixed cylinder. The fixed cylinder is rotatably connected to the receiving seat (1), one end of the movable rod away from the fixed cylinder is rotatably connected to the sampling rod (4), the fixed cylinder is rotatably connected to a second drive shaft (23) rotatably arranged on the receiving seat (1) through a second gear set (24), and the second drive shaft (23) is driven to rotate by a second motor (20) fixedly installed on the receiving seat (1); The clamping member includes a screw rod (12), a plurality of clamping jaws (15) are arranged radially at the end of the screw rod (12), the clamping jaws (15) are hinged to a threaded sleeve (13) threadedly installed on the screw rod (12) through a connecting rod (14), and the lifting and rotation of the screw rod (12) are controlled by a pushing member arranged in the telescopic cylinder (7); The pushing member includes a plugging cylinder (11) arranged inside the telescopic cylinder (7) and rotatably connected to the receiving seat (1), a plugging rod (10) is slidably arranged at the end of the plugging cylinder (11), and one end of the plugging rod (10) away from the plugging cylinder (11) is fixed to the screw rod (12); It further includes a connecting cylinder (18) disposed inside the plugging cylinder (11) and rotatably connected to the receiving seat (1). A chute (1801) is formed inside the connecting cylinder (18). A lifting rod (17) is arranged along the axial direction of the connecting cylinder (18). A first ball (1701) adapted to the chute is movably arranged on the inner wall of the lifting rod (17).

4. A method for sampling in a geological geotechnical exploration strength test according to claim 3, characterized in that, The rotating cylinder (2) is rotatably connected to a first driving shaft (21) rotatably arranged on the receiving seat (1) through a first gear set (22), and the first driving shaft (21) is driven to rotate by a first motor (19) fixedly installed on the receiving seat (1).

5. A method for sampling in a geological geotechnical exploration strength test according to claim 4, characterized in that, A first lead screw (3) fixedly connected to the receiving seat (1) is arranged inside the rotating cylinder (2). The first lead screw (3) is arranged along the axial direction of the rotating cylinder (2) and is threadedly connected to the sampling rod (4).

6. A method for sampling in a geological geotechnical exploration strength test according to claim 3, characterized in that, The rotation of the plugging cylinder (11) and the connecting cylinder (18) is respectively controlled by an intermittent driving member arranged on the receiving seat (1).

7. A method for sampling in a geological geotechnical exploration strength test according to claim 5, characterized in that, The intermittent driving member includes a first transmission shaft (27) and a second transmission shaft (28) rotatably arranged on the receiving seat (1). The first transmission shaft (27) is connected to the connecting cylinder (18) through a first bevel gear set (30), and the second transmission shaft (28) is connected to the plugging cylinder (11) through a second bevel gear set (31).

8. A method for sampling in a geological geotechnical exploration strength test according to claim 7, characterized in that, It further includes a second lead screw (26) rotatably arranged on the receiving seat (1). The rotation of the second lead screw (26) is driven by a third motor (25) fixedly arranged on the receiving seat (1). A connecting hoop (29) threadedly connected to the second lead screw (26) is sleeved on the first transmission shaft (27) and the second transmission shaft (28).

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