A rock and soil strength testing device for geological survey engineering

Abstract

The present invention relates to the technical field of rock and soil strength testing, and provides a rock and soil strength testing device for geological survey engineering, including a soil puncture test module and an angle adjustment module. The soil puncture test module includes a puncture rod, a puncture head, a hydraulic drive rod, a rotating part, a sampling part and a driving part. The hydraulic drive rod and the driving part are both connected to the puncture rod, one end of the puncture rod is fixedly connected to the rotating part, and a sampling hole and a first through hole are respectively provided at both ends of a sealed cavity inside the puncture head. The rotating part is rotatably connected in the sealed cavity, the puncture rod is fixedly connected to the rotating part, and a release core in the sampling part is located in the sampling cylinder. The first rotating shaft and the push rod in the angle adjustment module are both fixedly connected to the movable frame, the push rod is plugged into the first through hole and the sampling cylinder, the first rotating shaft is connected to the mobile vehicle body, and the hydraulic drive rod and the rotating part are both connected to the movable frame. The device has the characteristics of diverse functions and high sampling efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of rock and soil strength testing, in particular to a rock and soil strength testing device for geological survey engineering. Background Art

[0002] Geological exploration engineering refers to obtaining information on natural conditions such as underground soil, rock, hydrology, and climate through systematic geological surveys and experimental research to evaluate foundation bearing capacity, soil stability, and other geological conditions related to engineering construction. Geotechnical strength tests are used to evaluate the physical and mechanical properties of rock and soil, especially its bearing capacity and stability.

[0003] A search revealed publication number CN117144877B, which discloses a geological and geotechnical strength testing device. The device comprises a mobile testing machine with a downward pressure device mounted on its upper side. The upper side of the mobile testing machine is rotatably connected to a tray, which has a telescopic guide trough on one side. The end of the trough, facing away from the tray, is equipped with a coring device. This design demonstrates that by rotating the tray, the coring device can be positioned at different locations and depths within the mobile testing machine, enabling convenient sampling of core columns within a specified range. This allows for comprehensive comparison to determine the geological conditions of the sampled cores.

[0004] Geotechnical strength tests include soil penetration test, unconfined compressive strength test, triaxial shear test and direct shear test. Among them, soil penetration test can be performed directly at the geological site, unconfined compressive strength test and triaxial shear test need to be performed in the laboratory, and the integrity of the sample needs to be ensured, while direct shear test requires the sample to be divided into several parts before the test. Although the geological and geotechnical exploration strength test device in the existing technology can automatically obtain core column samples of different orientations and depths, it still has the following defects: (1) When the core column samples are sampled at the geological site, the soil penetration test cannot be performed simultaneously; (2) During the soil penetration test at a certain depth, the core column samples at that depth cannot be automatically divided into several parts, and thus the direct shear test cannot be performed on the core column samples separately. Summary of the Invention

[0005] The purpose of the present invention is to provide a rock and soil strength testing device for geological exploration engineering, aiming to solve the problems existing in the existing geological and rock and soil exploration strength testing devices.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a rock and soil strength testing device for geological survey engineering, comprising a mobile vehicle body and:

[0007] Soil penetration test module, the soil penetration test module includes a penetration rod, a penetration head, a hydraulic drive rod, a rotating member, a sampling member and a drive part. The hydraulic drive rod and the drive part are both connected to the penetration rod. One end of the penetration rod is fixedly connected to the rotating member. A sealing cavity is provided inside the penetration head. An injection hole and a first through hole are respectively provided at both ends of the sealing cavity. The rotating member is rotatably connected inside the sealing cavity. The penetration rod is fixedly connected to the rotating member;

[0008] The sampling member includes a release core and a sampling cylinder. Side ears and ear grooves are respectively provided on the inner sides of the release core and the sampling cylinder. The side ears are slidably connected in the ear grooves;

[0009] Angle adjustment module, the angle adjustment module includes a movable frame, a first rotating shaft and a top rod. The first rotating shaft and the top rod are both fixedly connected to the movable frame. The top rod is inserted and connected in the first through hole and the sampling cylinder. The first rotating shaft is connected to the moving vehicle body. The hydraulic drive rod and the rotating member are both connected to the movable frame.

[0010] As a further solution of the present invention, the angle adjustment module further includes a second driving member and a first transmission gear. The second driving member and the first transmission gear are respectively fixedly connected to the moving vehicle body and the first transmission gear. The second driving member is in transmission connection with the first transmission gear.

[0011] As a further solution of the present invention, it further includes a support assembly. The support assembly includes a support frame, a second rotating shaft, a second transmission gear, a support rod, a movable rod and a C-shaped frame. The support frame and the second transmission gear are both fixedly connected to the second rotating shaft. The second rotating shaft is connected to the moving vehicle body. The support rod and the C-shaped frame are respectively slidably connected to the support frame and the moving vehicle body. The movable rod is hinged between the C-shaped frame and the support rod.

[0012] As a further solution of the present invention, a second through hole is provided at one end of the sampling cylinder背离进样孔的一端设置有第二通孔,所述进样孔、第二通孔和第一通孔的孔径一致,所述进样孔的孔径不大于取样筒的内径。

[0013] As a further solution of the present invention, an assembly hole is provided at one end of the penetration head背离进样孔的一端设置有装配孔,所述密封腔中心位置固定连接有螺柱,所述螺柱端部螺纹连接有螺母。

[0014] As a further solution of the present invention, the rotating member includes a central tube, end caps, accommodation holes and second flange caps. The two end caps are fixedly connected to both ends of the central tube. The central tube is movably sleeved on the surface of the stud. The second flange cap is fixedly connected to the end cap. The nut is movably connected between the end cap and the second flange cap. Accommodation holes are provided on the surface of the end cap. The sampling cylinder is embedded in the accommodation holes.

[0015] As a further solution of the present invention, the end of the hydraulic drive rod is fixedly connected to a movable plate, one end of the puncture rod is rotatably connected to the surface of the movable plate, the other end of the puncture rod is fixedly connected to a first flange cover, and the second flange cover is fixedly connected to the first flange cover.

[0016] As a further solution of the present invention, the driving part includes a first driving member and a transmission tube, the first driving member and the transmission tube are both connected to the movable frame, the first driving member is in transmission connection with the transmission tube, the surface of the puncture rod and the inner wall of the transmission tube are respectively provided with ribs and rib grooves, the puncture rod passes through the transmission tube, and the ribs are slidably connected to the rib grooves.

[0017] As a further solution of the present invention, side blades are symmetrically provided on the side walls of the puncture head, a calibration port is provided at one end of the movable frame, and the side blades pass through the calibration port.

[0018] As a further solution of the present invention, it also includes a displacement sensor, an angle sensor and a control display panel. The surface of the movable plate is provided with a displacement sensor, the surfaces of the transmission tube and the first rotating shaft are both provided with angle sensors, and the surface of the movable body is provided with a control display panel.

[0019] The beneficial effects of the present invention are as follows: the present application can not only automatically perform soil penetration tests on rock and soil with different inclination angles, but also can collect soil samples of the same length into different sampling tubes by rotating and cutting the soil samples during the soil penetration test. The sealed cavity can smooth the cross-section of the soil sample cut off at the end of the sampling tube, which is used to improve the profile or end surface quality of the soil sample. After the sampling is completed, the soil sample can be automatically squeezed out from different sampling tubes, and it has the characteristics of diverse functions and high sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a perspective view of the present invention.

[0021] Figure 2 It is an exploded view of the present invention.

[0022] Figure 3 This is an exploded view of the soil penetration test module according to an embodiment of the present invention.

[0023] Figure 4 2 is a cross-sectional view of a puncture head according to an embodiment of the present invention.

[0024] Figure 5 2 is a cross-sectional view of a rotating member according to an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the disassembly of the sampling component according to an embodiment of the present invention.

[0026] Figure 7This is a cross-sectional view of the puncture head, rotating part and sampling part according to an embodiment of the present invention.

[0027] Figure 8 This is a three-dimensional diagram of an angle adjustment module according to an embodiment of the present invention.

[0028] Figure 9 This is an assembly diagram of the angle adjustment module and the support assembly according to an embodiment of the present invention.

[0029] Figure 10 It is a first planar cross-sectional view of the present invention.

[0030] Figure 11 Schematic diagram of a partial plan view of a soil penetration test module according to an embodiment of the present invention.

[0031] Figure 12 It is a second planar schematic diagram of the present invention.

[0032] Reference numerals: 1-mobile body, 11-track wheel;

[0033] 2- soil puncture test module, 21- puncture rod, 211- first flange cover, 212- rib, 22- puncture head, 221- sealing chamber, 222- sampling hole, 223- first through hole, 224- assembly hole, 225- stud, 2251- nut, 226- side cutter body, 23- hydraulic drive rod, 231- movable plate, 24- rotating part, 241- center tube, 242- end cover, 243- receiving hole, 244- second flange cover, 25- sampling part, 251- release core, 2511- side ear, 252- sampling tube, 2521- ear groove, 2522- second through hole, 26- driving part, 261- first driving part, 262- transmission tube;

[0034] 3-angle adjustment module, 31-movable frame, 32-first rotating shaft, 33-second driving member, 34-first transmission gear, 35-elevator, 36-calibration port;

[0035] 4-support assembly, 41-support frame, 42-second rotating shaft, 43-second transmission gear, 44-support rod, 45-movable rod, 46-shaped frame;

[0036] 5-displacement sensor, 6-angle sensor, 7-control display panel. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0039] See also Figures 1 to 11 In one embodiment of the present invention, a rock and soil strength testing device for geological survey engineering includes a mobile body 1, with crawler wheels 11 installed on both sides of the bottom of the mobile body 1, and further includes:

[0040] The soil puncture test module 2 includes a puncture rod 21, a puncture head 22, a hydraulic drive rod 23, a rotating member 24, a sampling member 25, and a driving unit 26. The hydraulic drive rod 23 and the driving unit 26 are both connected to the puncture rod 21. One end of the puncture rod 21 is fixedly connected to the rotating member 24. A sealed cavity 221 is provided inside the puncture head 22. A sampling hole 222 and a first through hole 223 are respectively provided at both ends of the sealed cavity 221. The rotating member 24 is rotatably connected in the sealed cavity 221. The puncture rod 21 is fixedly connected to the rotating member 24.

[0041] The sampling member 25 includes a release core 251 and a sampling tube 252. Side ears 2511 and ear grooves 2521 are respectively provided on both sides of the release core 251 and the inner side of the sampling tube 252. The side ears 2511 are slidably connected in the ear grooves 2521.

[0042] The angle adjustment module 3 includes a movable frame 31, a first rotating shaft 32 and a push rod 35. The first rotating shaft 32 and the push rod 35 are fixedly connected to the movable frame 31. The push rod 35 is plugged into the first through hole 223 and the sampling tube 252. The first rotating shaft 32 is connected to the mobile body 1. The hydraulic drive rod 23 and the rotating part 24 are both connected to the movable frame 31.

[0043] See also Figure 8 and Figure 10 Furthermore, the angle adjustment module 3 also includes a second driving member 33 and a first transmission gear 34. The second driving member 33 includes a second driving motor and a second driving gear. The second driving motor is connected to the second driving gear. The second driving motor and the first transmission gear 34 are respectively fixedly connected to the mobile body 1 and the first transmission gear 34. The second driving gear is in transmission connection with the first transmission gear 34.

[0044] See also Figure 8 and Figure 9Furthermore, side blades 226 are symmetrically provided on the side walls of the puncture head 22, and a calibration port 36 is provided at one end of the movable frame 31. The side blades 226 pass through the calibration port 36. The side blades 226 and the calibration port 36 cooperate with each other to calibrate the deflection angle of the puncture head 22, and to determine whether angular deviation occurs during the soil puncture test of the puncture head 22. In addition, in the process of the puncture head 22 entering the soil, the two sets of symmetrically provided side blades 226 are used to ensure force balance, thereby preventing the puncture head 22 from having angular deviation, and thus ensuring that after the sampling is completed, the push rod 35 can be accurately inserted into the first through hole 223.

[0045] See also Figures 7 to 9 Furthermore, the driving part 26 includes a first driving member 261 and a transmission tube 262, both of which are connected to the movable frame 31, and the first driving member 261 is transmission-connected to the transmission tube 262, and the surface of the puncture rod 21 and the inner wall of the transmission tube 262 are respectively provided with ribs 212 and rib grooves, and the puncture rod 21 passes through the transmission tube 262, and the ribs 212 are slidingly connected to the rib grooves.

[0046] In an embodiment of the present invention, the end of the hydraulic drive rod 23 is fixedly connected to the movable plate 231, one end of the puncture rod 21 is rotatably connected to the surface of the movable plate 231, and a second through hole 2522 is provided at the end of the sampling cylinder 252 away from the injection hole 222. The apertures of the injection hole 222, the second through hole 2522 and the first through hole 223 are consistent, and the aperture of the injection hole 222 is not larger than the inner diameter of the sampling cylinder 252.

[0047] A displacement sensor 5 is provided on the surface of the movable plate 231 , angle sensors 6 are provided on the surfaces of the transmission tube 262 and the first rotating shaft 32 , a pressure sensor is provided on the hydraulic drive rod 23 , and a control display panel 7 is provided on the surface of the mobile body 1 .

[0048] The puncture rod 21 is a cylindrical rod with a diameter of 1-5 cm and a length of 30 cm-100 cm. The puncture head 22 is conical in shape and is usually made of wear-resistant metal materials (such as stainless steel or alloy) to enhance its durability and corrosion resistance. The injection hole 222 is set on the conical surface of the puncture head 22. Figure 7 and Figure 11, the length of the injection hole 222 is 1 / 4 or 1 / 3 of the length of the sampling cylinder 252. The length of the release core 251 is not less than the length of the injection hole 222. When the side ear 2511 moves to the end of the ear groove 2521, the release core 251 completely enters the injection hole 222, so that it can be used to completely extrude the soil sample from the injection hole 222. The apertures of the second through hole 2522 and the first through hole 223 are 1 cm. The front end diameter of the ejector rod 35 is 0.8 - 1 cm, the root end diameter is 2 - 3 cm, and the length of the ejector rod 35 is 15 - 18 cm. Since the aperture of the first through hole 223 is small and the release core 251 can block from the inside of the sampling cylinder 252, the probability that soil particles enter the sampling cylinder 252 from the first through hole 223 is relatively small and will not affect sampling.

[0049] Please refer to Figure 9 , Figure 10 and Figure 12 , in an embodiment of the present invention, it further includes a support assembly 4. The support assembly 4 includes a support frame 41, a second rotating shaft 42, a second transmission gear 43, a support rod 44, a movable rod 45 and a U-shaped frame 46. The support frame 41 and the second transmission gear 43 are both fixedly connected to the second rotating shaft 42. The second rotating shaft 42 is connected to the moving vehicle body 1. The support rod 44 and the U-shaped frame 46 are respectively slidably connected to the support frame 41 and the moving vehicle body 1. The movable rod 45 is hinged between the U-shaped frame 46 and the support rod 44. The ends of the U-shaped frame 46 and the support rod 44 are both sharpened to improve the grip force.

[0050] In an embodiment of the present invention, when a geotechnical strength test needs to be carried out on the vertical surface of a geological tunnel, a mine tunnel or a foundation pit, first, the second driving member 33 and the first transmission gear 34 are used to control the movable frame 31 to rotate around the first rotating shaft 32. The rotating first rotating shaft 32 drives the support frame 41 and the support rod 44 to rotate in the opposite direction around the second rotating shaft 42 through the first transmission gear 34 and the second transmission gear 43. Although the piercing head 22 needs to complete the geotechnical strength test on the vertical surface of the geological tunnel, the mine tunnel or the foundation pit at a relatively large inclination angle, the movable rod 45 hinged between the support rod 44 and the U-shaped frame 46 can, on the one hand, drive the support rod 44 to slide along the support frame 41, and on the other hand, drive the U-shaped frame 46 to slide towards the ground, which not only expands the support angle of the support rod 44 but also increases the depth of the U-shaped frame 46 inserted into the ground, thereby improving the grip force and stability of the device.

[0051] Please refer to Figures 4 to 7 , in an embodiment of the present invention, an assembly hole 224 is provided at one end of the piercing head 22背离 the injection hole 222. A stud 225 is fixedly connected to the center position of the sealing cavity 221. A nut 2251 is threadedly connected to the end of the stud 225.

[0052] Please refer to Figures 5 to 7 Furthermore, the rotating member 24 includes a center tube 241, an end cover 242, a receiving hole 243 and a second flange cover 244. The two end covers 242 are fixedly connected to the two ends of the center tube 241. The center tube 241 is movably sleeved on the surface of the stud 225. The second flange cover 244 is fixedly connected to the end cover 242. The nut 2251 is movably connected between the end cover 242 and the second flange cover 244. The surface of the end cover 242 is provided with a receiving hole 243, and the sampling tube 252 is embedded in the receiving hole 243.

[0053] See also Figure 2 and Figure 11 Furthermore, the other end of the puncture rod 21 is fixedly connected to the first flange cover 211 , and the second flange cover 244 is fixedly connected to the first flange cover 211 .

[0054] In an embodiment of the present invention, the fixed connection between the second flange cover 244 and the first flange cover 211 enables the rotating member 24 and the sampling tube 252 to rotate synchronously with the puncture rod 21. Since the second flange cover 244 can seal the assembly hole 224, soil will not enter the sealing cavity 221. A sealing ring or sealing gasket can also be provided between the second flange cover 244 and the assembly hole 224 to further improve the sealing effect.

[0055] Working principle: First, the mobile body 1 is moved to the specified position using the track wheel 11, and then the second driving member 33 and the first transmission gear 34 are used to control the movable frame 31 to rotate around the first rotating shaft 32, which is used to calibrate the puncture angle of the puncture head 22, thereby ensuring that the puncture angle is vertically inserted into the geological soil. Then, the hydraulic drive rod 23 is used to control the puncture head 22 to slowly insert into the geological soil at a constant pressure. The penetration depth of the puncture head 22 is monitored in real time according to the displacement sensor 5, and the pressure parameters are obtained using the pressure sensor at the hydraulic drive rod 23. Then, the mobile body 1 is used to change different test positions for testing, and the penetration depth data and pressure parameters are organized into tables or charts. The relationship between the force required for puncture and the puncture depth is analyzed, and the compressive strength of the soil is calculated based on the experimental data.

[0056] During the soil strength test, driven by the squeezing force, the soil sample enters the sampling cylinder 252 through the sampling hole 222 (because the release core 251 is located in the sampling hole 222 in the initial state, the squeezing force will drive the release core 251 to move back into the sampling cylinder 252). The penetration depth of the puncture head 22 is monitored in real time by the displacement sensor 5. When it is confirmed that the soil sample is completely filled in the sampling cylinder 252 according to the penetration depth, the release core 251 moves to the other end of the sampling cylinder 252, and the first driving member 261 is used to control the transmission tube 262, the puncture rod 21, and the rotating member 24 to rotate around the stud 225 as the axis. 90 degrees or 120 degrees, on the one hand, is used to cut off the soil sample filled between the sampling hole 222 and the sampling cylinder 252, and on the other hand, is used to adjust the other sampling cylinder 252 to a position aligned with the sampling hole 222. Since the sampling cylinder 252 is in sliding contact with the surface of the sealing cavity 221, on the one hand, it can seal the end of the sampling cylinder 252 to prevent the sample from falling, and on the other hand, the sealing cavity 221 can smooth the cross-section of the soil sample cut off at the end of the sampling cylinder 252, which is used to improve the profile or end surface quality of the soil sample, so as to facilitate the subsequent unconfined compressive strength test and triaxial shear test of the soil sample in the laboratory.

[0057] The above method can achieve the purpose of layered sampling of soil samples at different depths. After the sampling is completed, the hydraulic drive rod 23 is used to control the puncture head 22 to reset. During the reset process, the relatively moving push rod 35 is inserted into the sampling cylinder 252 from the first through hole 223 and the second through hole 2522, and the pressure is directly applied to the release core 251. The release core 251 is used to squeeze the soil sample inside the sampling cylinder 252. Since a part of the soil sample is filled in the sampling hole 222, the length of the soil sample squeezed out for the first time is the longest. The hydraulic drive rod 23 and the first through hole 2522 are used to control the puncture head 22 to reset. The driving member 261 controls the reciprocating movement of the puncture head 22 and the alignment of different sampling cylinders 252 with the sampling holes 222 in sequence, thereby achieving the purpose of automatically squeezing out the soil samples inside different sampling cylinders 252. When collecting samples, the user can directly put a plastic bag or other sealed container on the end of the puncture head 22 to collect soil samples of different depths squeezed out from the sampling holes 222 in sequence. It has the characteristics of sampling soil at different depths along the axis of the puncture head 22 and automatically squeezing out soil samples at different depths, thereby improving the work efficiency of soil sampling and testing.

[0058] In summary, the present application can not only automatically perform soil penetration tests on rock and soil with different inclination angles, but also can collect soil samples of the same length into different sampling tubes 252 by rotating and cutting the soil samples during the soil penetration test. The sealed cavity 221 can smooth the cross-section of the soil sample cut off at the end of the sampling tube 252 to improve the profile or end face quality of the soil sample. After the sampling is completed, the soil sample can be automatically squeezed out from different sampling tubes 252, and it has the characteristics of diverse functions and high sampling efficiency.

[0059] When the present application conducts a geotechnical strength test on the facade of a geological tunnel, mine or foundation pit, when adjusting the inclination angle of the puncture head 22, the support angle of the support rod 44 and the depth of the U-shaped frame 46 inserted into the ground will increase synchronously, preventing the mobile body 1 from shaking, deflecting or tilting during the puncture test, and having the characteristics of strong grip and high stability.

[0060] For those skilled in the art, although several embodiments and examples of the present invention have been described, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the invention.

[0061] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A rock and soil strength testing device for geological survey engineering, comprising a mobile vehicle (1), characterized in that: Also includes: A soil puncture test module (2) is provided. The soil puncture test module (2) comprises a puncture rod (21), a puncture head (22), a hydraulic drive rod (23), a rotating member (24), a sampling member (25) and a driving unit (26). The hydraulic drive rod (23) and the driving unit (26) are both connected to the puncture rod (21). One end of the puncture rod (21) is fixedly connected to the rotating member (24). A sealed cavity (221) is provided inside the puncture head (22). A sampling hole (222) and a first through hole (223) are provided at both ends of the sealed cavity (221). The rotating member (24) is rotatably connected in the sealed cavity (221). The puncture rod (21) is fixedly connected to the rotating member (24). The sampling member (25) comprises a release core (251) and a sampling barrel (252), and side ears (2511) and ear grooves (2521) are respectively provided on both sides of the release core (251) and the inner side of the sampling barrel (252), and the side ears (2511) are slidably connected in the ear grooves (2521); An angle adjustment module (3), the angle adjustment module (3) comprising a movable frame (31), a first rotating shaft (32), a push rod (35), a second driving member (33) and a first transmission gear (34), the first rotating shaft (32) and the push rod (35) being fixedly connected to the movable frame (31), the push rod (35) being plugged into and connected to the first through hole (223) and the sampling cylinder (252), the first rotating shaft (32) being connected to the mobile vehicle body (1), the hydraulic driving rod (23) and the rotating member (24) being connected to the movable frame (31), the second driving member (33) and the first transmission gear (34) being fixedly connected to the mobile vehicle body (1) and the first transmission gear (34), respectively, and the second driving member (33) being transmission-connected to the first transmission gear (34); The side wall of the puncture head (22) is symmetrically provided with a side blade body (226), one end of the movable frame (31) is provided with a calibration port (36), and the side blade body (226) passes through the calibration port (36); When it is confirmed that the soil sample is completely filled in the sampling tube (252) according to the penetration depth, the release core (251) moves to the other end of the sampling tube (252), and the first driving member (261) is used to control the transmission tube (262), the piercing rod (21), and the rotating member (24) to rotate 90 degrees or 120 degrees with the stud (225) as the axis. On the one hand, it is used to cut off the soil sample filled between the injection hole (222) and the sampling tube (252), and on the other hand, it is used to adjust another sampling tube (252) to a position aligned with the injection hole (222). The sampling tube (252) is in sliding contact with the surface of the sealing cavity (221). On the one hand, it can play a role in sealing the end of the sampling tube (252) to prevent the sample from falling, and on the other hand, the sealing cavity (221) can smooth the cross section of the soil sample cut off at the end of the sampling tube (252).

2. A rock and soil strength testing device for geological survey engineering according to claim 1, characterized in that: It further includes a support component (4), and the support component (4) includes a support frame (41), a second rotating shaft (42), a second transmission gear (43), a support rod (44), a movable rod (45) and a U-shaped frame (46). The support frame (41) and the second transmission gear (43) are both fixedly connected to the second rotating shaft (42), the second rotating shaft (42) is connected to the moving vehicle body (1), the support rod (44) and the U-shaped frame (46) are respectively slidably connected to the support frame (41) and the moving vehicle body (1), and the movable rod (45) is hinged between the U-shaped frame (46) and the support rod (44).

3. A rock and soil strength testing device for geological survey engineering according to claim 2, characterized in that: One end of the sampling cylinder (252) facing away from the sample injection hole (222) is provided with a second through hole (2522). The apertures of the sample injection hole (222), the second through hole (2522) and the first through hole (223) are the same, and the aperture of the sample injection hole (222) is not larger than the inner diameter of the sampling cylinder (252).

4. A rock and soil strength testing device for geological survey engineering according to claim 3, characterized in that: One end of the puncture head (22) facing away from the sample injection hole (222) is provided with an assembly hole (224). A stud (225) is fixedly connected to the central position of the sealing cavity (221), and a nut (2251) is threadedly connected to the end of the stud (225).

5. A rock and soil strength testing device for geological survey engineering according to claim 4, characterized in that: The rotating member (24) includes a central tube (241), end caps (242), a receiving hole (243) and a second flange cover (244). The two end caps (242) are fixedly connected to both ends of the central tube (241). The central tube (241) is movably sleeved on the surface of the stud (225). The second flange cover (244) is fixedly connected to the end cap (242). The nut (2251) is movably connected between the end cap (242) and the second flange cover (244). A receiving hole (243) is provided on the surface of the end cap (242), and the sampling cylinder (252) is embedded in the receiving hole (243).

6. A rock and soil strength testing device for geological survey engineering according to claim 5, characterized in that: One end of the hydraulic drive rod (23) is fixedly connected with a movable plate (231). One end of the puncture rod (21) is rotatably connected to the surface of the movable plate (231). The other end of the puncture rod (21) is fixedly connected with a first flange cover (211), and the second flange cover (244) is fixedly connected to the first flange cover (211).

7. A rock and soil strength testing device for geological survey engineering according to claim 6, characterized in that: The driving part (26) includes a first driving member (261) and a transmission tube (262). The first driving member (261) and the transmission tube (262) are both connected to the movable frame (31). The first driving member (261) is in transmission connection with the transmission tube (262). Ribs (212) and rib grooves are respectively provided on the surface of the puncture rod (21) and the inner wall of the transmission tube (262). The puncture rod (21) penetrates through the transmission tube (262), and the ribs (212) are slidably connected with the rib grooves.

8. A rock and soil strength testing device for geological survey engineering according to claim 7, characterized in that: It further includes a displacement sensor (5), an angle sensor (6) and a control display panel (7). A displacement sensor (5) is provided on the surface of the movable plate (231). Angle sensors (6) are provided on the surfaces of the transmission tube (262) and the first rotating shaft (32). A control display panel (7) is provided on the surface of the moving vehicle body (1).

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