CN218766077U - Soil sampling device for geotechnical investigation - Google Patents

Abstract

The utility model provides a soil sampling device for rock and soil survey, which comprises an intelligent adjustment stand, a propulsion device, a transmission box, a power device, a detection device, and a sample storage device, and is characterized in that the intelligent adjustment stand is equipped with The universal level detector, the hydraulic support and the intelligent platform controller, the intelligent platform controller can control the telescopic movement of the hydraulic support in real time according to the detection feedback results of the universal level instrument to adjust the level of the sampling device in real time; the propulsion device can drive The transmission box, the retrieval device and the sample storage device move up and down vertically; the power device is equipped with a motor, helical gear transmission and double-row tapered roller bearings as supports; the retrieval device is arranged with a retrieval device tube, buffer pad, shock absorbing tube and equipped with a drilling probe and a pressure probe; the sample storage device and the retrieval device are detachably threaded; the present invention provides a multi-functional, high-precision, intelligently adjustable Levelness, so as to realize accurate and true rock soil sampling device.

Description

Soil sampling device for geotechnical investigation

technical field

The utility model relates to the technical field of surveying, in particular to a soil sampling device for rock and soil surveying.

Background technique

Before the design and development of construction projects, it is necessary to carry out geotechnical engineering surveys on the construction land to find out the engineering geological conditions, analyze the existing geological problems, make an engineering geological evaluation of the construction area, and then guide the engineering design and construction. The geotechnical investigation process usually uses soil sampling equipment to sample the soil of the construction land, and then issues a geological evaluation report through inspection experiments. Therefore, the biggest factor affecting the accuracy and authenticity of the experiment is the quality of the obtained soil samples.

In the Chinese Patent No. CN211292062U, a construction geotechnical survey and sampling device is described. The device is provided with a movable processing box, and the soil sampling device is fixed inside the processing box, so that the device can be moved more conveniently. While meeting basic soil sampling requirements, it is more convenient for sampling construction personnel to move the device. However, the problem with this device is that the movable rollers cannot adjust the height and angle, and basically can only move on a relatively flat road surface. For most construction lands, when conducting geotechnical surveys, uneven ground is often encountered. In this case, the device cannot be moved conveniently, and because the sampling device is fixed to the processing box, when the processing box is tilted, the sampling device will also tilt, resulting in inaccurate sampling or even sampling failure.

In the Chinese patent No. CN211598537U, a drilling device for geotechnical investigation in building foundation construction is recorded. By setting a support device on the base, the device can support the cavity during the drilling process, thereby improving the drilling efficiency. stability. However, the problem with this device is that the soil sample obtained by using the spiral blade itself has destroyed the soil structure of the soil in the direction perpendicular to the ground, and at the same time, in the process of taking the soil out and transferring it to another container, the content of the soil will be affected. The amount of water, chemical composition, etc. will cause further damage, which will affect the accuracy and authenticity of the inspection.

In the Chinese Patent No. CN215979225U, a drilling device for geotechnical investigation in building foundation construction is recorded. The device is provided with an absorbable support fixing seat structure, which is convenient for fixing the equipment during use, and through the buffer spring Pushing the sliding block and the sliding plate is convenient for buffering during the drilling process and prevents the drilling motor from overheating due to excessive progress. However, the problem with this device is that when the ground is soft, the number of fixing seats is small, so the device cannot be fixed well, and the soil drilled by the spiral blade may be difficult to obtain due to the fluidity of the soil. .

Based on the above existing technologies, it is not difficult to find that the current soil sampling devices usually have the following problems:

1. It cannot satisfy the sampling of uneven ground, and the sampling device is prone to tilt due to the complex geological structure, so that the samples taken cannot truly reflect the soil composition structure perpendicular to the ground.

2. Most of the existing sampling devices excavate the soil through the drilling structure of the drill bit, and then perform sampling, which seriously damages the original geological structure, making the quality of the soil sample difficult to meet the requirements and affecting the accuracy of subsequent experimental analysis.

3. It cannot meet the sampling requirements of different soil properties at the same time. For example, drilling can be used for hard geology, but if drilling is also used for softer geology, the soil structure will be easily damaged, and even it is difficult to take out soil samples due to the fluidity of the soil. At this time, it is more suitable to use pressure drilling. The way.

In order to solve the above technical problems, it is urgent to design a soil sampling device with more comprehensive functions and wider adaptability.

Utility model content

The utility model provides a soil sampling device for geotechnical investigation, which solves the problems in the above-mentioned background technology that it cannot meet the requirements of sample sampling on uneven ground and different soil structures. Ensure the integrity and accuracy of the sample geological structure.

The soil sampling device for geotechnical investigation includes an intelligent adjustment platform, a propulsion device, a transmission box, a power device, a probing device and a sample storage device;

The intelligent adjustment platform includes a horizontal installation plate, a hydraulic support structure, an intelligent platform controller, and a universal level detector. The universal level detector and the universal level detector are fixedly connected to one side of the horizontal installation plate. The intelligent platform controller is fixedly connected with the hydraulic support structure on the other side, and the propulsion device is fixedly connected under the horizontal mounting plate;

The propulsion device includes a propulsion system controller, a first hydraulic propulsion rod, a second hydraulic propulsion rod, a third hydraulic propulsion rod, a fourth hydraulic propulsion rod, a fifth hydraulic propulsion rod, a sixth hydraulic propulsion rod, and a seventh hydraulic propulsion rod. Propelling rod, the eighth hydraulic propelling rod, one end of the eight hydraulic propelling rods is installed on the horizontal mounting plate, and the other end is fixedly connected to the transmission box;

The transmission box includes a first bearing support, a second bearing support, and a motor fixing support. The upper and lower surfaces of the transmission box are respectively installed with the first bearing support and the second bearing support, and The motor fixing support is arranged on the same side of the first bearing support, and the transmission box is equipped with a power device;

The power device includes a motor, a first transmission gear, a second transmission gear, a first bearing, a second bearing, the motor is fixedly mounted on the motor fixed support, the first bearing and the second The bearings are installed in cooperation with the first bearing support and the second bearing support respectively, and the detecting device is installed in cooperation with the first bearing and the second bearing;

The detecting device includes a detecting tube, a drilling probe, a pressure detecting probe, a shock absorbing tube, and a buffer pad. One end of the detecting tube has an inward groove structure, and the buffer pad is located on the The bottom of the groove structure, the outer surface of the shock absorbing tube coincides with the inner wall of the detecting tube, and one end surface of the shock absorbing tube is pressed and fitted with the buffer pad, and the detecting tube has a groove structure One end of the drill probe or the pressure probe is connected;

The sample storage device includes a first end cap of the storage tube, a storage tube, and a second end cap of the storage tube, one end of the storage tube is threadedly connected to the probe tube, and the outer wall surface of the storage tube is connected to the inside of the shock absorbing tube. The wall surface coincides with the installation.

Preferably, the first transmission gear and the second transmission gear are cylindrical helical gears, and the rotation of the cylindrical helical gears is 10.

Preferably, the axes of the first bearing and the second bearing are collinear, and both are double-row tapered roller bearings.

Preferably, the axes of the eight hydraulic propulsion rods are perpendicular to the horizontal mounting plate, and the propulsion system controller is above the horizontal mounting plate.

Preferably, the sample storage device is detachably connected to the detection device, and the first end cap of the storage tube and the second end cap of the storage tube can be installed at both ends of the storage tube in cooperation.

Beneficial effect

The utility model provides a soil sampling device for geotechnical investigation. Has the following beneficial effects:

1. The rock and soil sampling device, aimed at complex potholes, can be adjusted through eight hydraulic supports to ensure the level of the sampling device, and during the sampling process, the universal level detector can detect the level of the sampling device in real time , the universal level detector is connected with the intelligent bench controller. When the sampling device is tilted, the universal level detector transmits the signal to the smart bench controller, and the smart bench controller adjusts the corresponding The tilt compensation of the hydraulic support can realize the intelligent real-time level adjustment of the sampling device, liberate the labor and improve the sampling accuracy.

2. The rock and soil sampling device can be matched with different probe device structures and power devices for different soil structures. When targeting soft soil rock and soil, the pressure probe is connected to the probe tube, and the propulsion device is used to Rock and soil sampling by pressure exploration can avoid damage to the soft soil structure due to vibration. For harder rock and soil, the drilling probe is connected with the probe tube, and the rock and soil samples are drilled and sampled through the motor and propulsion device. For different sampling The demand meets the reasonable power optimization design and improves the energy utilization rate.

3. The rock and soil sampling device can effectively reduce the vibration caused by the sampling process. During the sampling process, the shock-absorbing tube and the buffer pad can effectively absorb the shock, reducing the vibration of the sample storage tube, thus avoiding the soil sample due to vibration. damage to the structure.

4. The sample storage device and the detection device in the rock and soil sampling device are detachably connected. During the sampling process of the device, the soil sample directly enters the sample storage device. After the sampling is completed, the sample can be directly transferred to the sample storage device for testing without Transferring the sampled samples to other storage equipment for the second time can ensure the originality of the samples to the greatest extent, improve the authenticity of subsequent testing experiments, and facilitate the accurate formulation and implementation of construction plans.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model;

Fig. 2 is a sectional view of the utility model;

Fig. 3 is a cross-sectional view of the cooperation position between the retrieval device and the storage tube of the present invention;

Fig. 4 is a fracture sectional view of the sample storage device of the present invention;

Fig. 5 is a schematic diagram of the matching position of the probe tube and the power device.

Main reference signs:

Intelligent adjustment bench-1, horizontal mounting plate-11, first hydraulic support-12a, second hydraulic support-12b, third hydraulic support-12c, fourth hydraulic support-12d, fifth hydraulic support-12e, sixth hydraulic support Hydraulic support-12f, seventh hydraulic support-12g, eighth hydraulic support-12h, intelligent bench controller-13, universal level detector-14, circular through hole 15, propulsion device-2, propulsion system controller -21, the first hydraulic propulsion rod-22, the second hydraulic propulsion rod-23, the third hydraulic propulsion rod-24, the fourth hydraulic propulsion rod-25, the fifth hydraulic propulsion rod-26, the sixth hydraulic propulsion rod-27 , the seventh hydraulic propulsion rod-28, the eighth hydraulic propulsion rod-29, the transmission box-3, the first bearing support-31, the second bearing support-32, the motor fixed support-33, the power unit-4 , motor-41, first transmission gear-42, second transmission gear-43, first bearing-44, second bearing-45, detection device-5, detection tube-51, drilling probe-52, pressure detection Probe-53, shock absorbing tube-54, buffer pad-55, sample storage device-6, storage tube first end cap-61, storage tube-62, storage tube second end cap-63.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The utility model provides a soil sampling device for geotechnical survey, as shown in Fig. 1 , comprising an intelligent adjustment platform 1, a propulsion device 2, a transmission box 3, a power device 4, a detection device 5 and a sample storage device 6.

As shown in Figures 1 and 2, a circular through hole 15 is opened in the center of the horizontal mounting plate 11, and a universal level detector 14 and an intelligent bench controller 13 are fixedly connected to the upper surface of the horizontal mounting plate 11, and The horizontal detector 14 and the intelligent platform controller 13, and the propulsion system controller 21 are located on the upper side of the horizontal mounting plate 11, and the side below the horizontal mounting plate 11 is fixedly connected with a hydraulic support structure 12, and the hydraulic support structure 12 includes eight Hydraulic support, first hydraulic support 12a, second hydraulic support 12b, third hydraulic support 12c, fourth hydraulic support 12d, fifth hydraulic support 12e, sixth hydraulic support 12f, seventh hydraulic support 12g, eighth hydraulic support 12h , the eight hydraulic supports are respectively located in the direction of the eight sides of the regular octagonal horizontal mounting plate 11, and together form an octagonal platform shape, the eight hydraulic supports are connected to the intelligent bench controller 13 for parallel control, and the intelligent bench controller 13 According to the detection result of the universal level detector 14, the eight hydraulic supports are respectively controlled to carry out telescopic movement, and the levelness of the sampling device is adjusted in real time.

As shown in Figure 2, a first hydraulic propulsion rod 22, a second hydraulic propulsion rod 23, a third hydraulic propulsion rod 24, a fourth hydraulic propulsion rod 25, and a fifth hydraulic propulsion rod are vertically installed directly below the horizontal mounting plate 11. 26, the sixth hydraulic propulsion rod 27, the seventh hydraulic propulsion rod 28, the eighth hydraulic propulsion rod 29, the first hydraulic propulsion rod 22, the second hydraulic propulsion rod 23, the third hydraulic propulsion rod 24, the fourth hydraulic propulsion rod 25. The other end of the fifth hydraulic propulsion rod 26, the sixth hydraulic propulsion rod 27, the seventh hydraulic propulsion rod 28, and the eighth hydraulic propulsion rod 29 are fixedly connected to the transmission box 3, and the transmission box 3 is parallel to the horizontal installation plate 11 arrangement, and the first hydraulic propulsion rod 22, the second hydraulic propulsion rod 23, the third hydraulic propulsion rod 24, the fourth hydraulic propulsion rod 25, the fifth hydraulic propulsion rod 26, the sixth hydraulic propulsion rod 27, the seventh hydraulic propulsion rod 28. The eighth hydraulic propulsion rod 29 is connected in series, and the propulsion system controller 21 can control the synchronous telescopic movement of the eight hydraulic propulsion rods, and then drive the transmission box 3 and the exploration device 5 to carry out drilling sampling or pressure testing sampling movement for rock and soil .

As shown in Figure 2, the transmission box body 3 is a shell with a regular octagonal horizontal section, and the center of the transmission box body 3 is provided with a vertical circular hole that is fixedly connected to the first bearing support 31 and the second bearing support 32 respectively. On the same side as the first bearing support 31, a motor fixed support 33 is arranged, and the motor fixed support 33 and the transmission box body 3 are relatively fixedly installed, and the power unit 4 is assembled in the transmission box body 3.

As shown in Figure 2, the motor 41 is fixedly installed on the motor fixed support 33, the main shaft of the motor 41 is connected with the second transmission gear 43 through key cooperation, and the first bearing 44 and the second bearing 45 are connected with the first bearing support 31 respectively. It is mechanically installed with the second bearing support 32, and the detection device 5 is installed in cooperation with the first bearing 44 and the second bearing 45, and the detection tube 51 in the detection device 5 is equipped with the first transmission gear 42, and the first transmission gear The gear 42 and the second transmission gear 43 are installed in gear transmission cooperation.

As shown in Figures 3 and 4, the probe tube 51 is a cylindrical steel pipe as a whole, and there is an inward groove structure at one end of the probe tube 51. The bottom of the groove structure of the probe tube 51, the shock absorbing tube 54 is coaxially matched with the probe tube 51, the outer surface of the shock absorbing tube 54 coincides with the inner wall of the probe tube 51, and one end surface of the shock absorbing tube 54 is in contact with the buffer pad. 55 compression fit, the threaded structure of the storage tube 62 is threadedly connected with the probe tube 51, the outer wall surface of the storage tube 62 coincides with the inner wall surface of the shock absorbing tube 54 and is installed, and one end of the probe tube 51 with a groove structure is connected to the drilling probe 52 (or Pressure probe 53) is connected. The shock-absorbing tube 54 and the buffer pad 55 can effectively reduce the vibration caused by the complex geological structure during the construction and sampling process of the sampling device, and reduce the damage to the soil structure of the rock-soil sample.

As shown in Figures 3 and 4, one end of the storage tube 62 has a threaded structure, and the sample storage device 6 is detachably connected to the detection device 5. After the sampling device finishes sampling, the storage tube 62 is taken out, and the storage tube 62 is removed. The first end cap 61 and the second end cap 63 of the storage tube are installed at both ends of the storage tube 62, so that the sample can be transported together with the storage device 6 for detection, ensuring the authenticity of the sample.

As shown in Figure 5, the first transmission gear 42 and the second transmission gear 43 are cylindrical helical gears, and the rotation of the cylindrical helical gears is 10, which ensures the smoothness of the transmission of the power unit and reduces the sampling process of the sampling device. in the vibration.

As shown in FIG. 5 , the first bearing 44 and the second bearing 45 are double-row tapered roller bearings, and the tapered roller bearings can provide sufficient bidirectional axial force for the probe tube 51 .

Working principle 1: For uniform soft soil, connect the pressure probe 53 to the probe tube 51, place the sampling device in the target sampling area after connection, turn on the intelligent bench controller 13 and the universal level detector 14, For the flatness of the current ground environment, the universal level detector 14 is used to measure the levelness of the current sampling device. If the sampling device is tilted, the universal level detector 14 will feed back the detection results to the intelligent platform controller 13, According to the inclination direction and inclination degree of the sampling device, start the hydraulic support in the corresponding direction and position respectively to compensate the inclination of the sampling device to ensure the levelness of the horizontal installation plate 11, and then start the propulsion system controller 21 to control the first Hydraulic push rod 22, second hydraulic push rod 23, third hydraulic push rod 24, fourth hydraulic push rod 25, fifth hydraulic push rod 26, sixth hydraulic push rod 27, seventh hydraulic push rod 28, eighth hydraulic push rod The propulsion rod 29 extends synchronously, drives the power unit 4 and the extraction device 5 to move synchronously, and the rock and soil samples gradually enter the storage tube 62 to perform pressure exploration and sampling of the rock and soil. During the pressure exploration and sampling process of the exploration device 5, if the The level detector 14 detects that the sampling device is tilted, and the intelligent bench controller 13, according to the tilting direction and degree of the sampling device, starts the hydraulic support in the corresponding direction and position respectively, and compensates the inclination of the sampling device to ensure real-time The levelness of the horizontal installation plate 11 ensures the sampling accuracy. When the pressure probe sampling reaches the required sampling depth, the propulsion system controller 21 controls the propulsion system 2 to move in the opposite direction of the stretching sampling direction. After gradually leaving the ground, the propulsion system control is turned off. 21, turn off the universal level detector 14 and the intelligent bench controller 13, manually take out the storage tube 62 from the exploration device 5 together with the rock and soil samples, and use the first end cap 61 of the storage tube and the second end of the storage tube The cover 63 is connected with the storage tube 62, so that the sample storage device forms an airtight space, which is then transferred for subsequent detection, and the sampling is completed.

Working principle 2: For complex and hard soil, connect the drilling probe 53 to the probe pipe 51, place the sampling device in the target sampling area after connection, turn on the intelligent bench controller 13 and the universal level detector 14, and aim at the current For the flatness of the ground environment, the universal level detector 14 is used to measure the levelness of the current sampling device. If the sampling device is tilted, the universal level detector 14 will feed back the detection results to the intelligent bench controller 13 for sampling. The inclination direction and inclination degree of the device respectively start the hydraulic support in the corresponding direction position, and compensate the inclination of the sampling device to ensure the levelness of the horizontal installation plate 11, and then start the motor 41 and the propulsion system controller 21, the motor 41 The second transmission gear 43 and the first transmission gear drive the exploration device 5 and the drilling probe 52 to rotate, and the propulsion system controller 21 controls the first hydraulic propulsion rod 22, the second hydraulic propulsion rod 23, the third hydraulic propulsion rod 24, the The fourth hydraulic propulsion rod 25, the fifth hydraulic propulsion rod 26, the sixth hydraulic propulsion rod 27, the seventh hydraulic propulsion rod 28, and the eighth hydraulic propulsion rod 29 synchronously extend and move, driving the exploration device 5 and the drilling probe 52 to realize the rotation step by step Sampling rock and soil, the rock and soil samples gradually enter the storage pipe 62, and the rock and soil are drilled and sampled. Since the top of the drilling probe 52 is zigzag, the drilling ability to complex geological structures is greatly increased. During the drilling and sampling process of the exploration device 5 , if the universal level detector 14 detects that the sampling device is tilted, the intelligent bench controller 13, for the tilt direction and degree of the sampling device, respectively starts the hydraulic support at the corresponding direction position, and performs the inclination of the sampling device. Compensation, to ensure the levelness of the horizontal mounting plate 11 in real time, to ensure the sampling accuracy, when the drilling sampling reaches the required sampling depth, the motor 41 is turned off, and the propulsion system controller 21 controls the propulsion system 2 to move in the opposite direction of the stretching sampling direction, and gradually disengages After the ground, close the propulsion system controller 21, close the universal level detector 14 and the intelligent bench controller 13, manually take out the storage tube 62 from the exploration device 5 together with the rock and soil samples, and use the storage tube first end cap 61 and the second end cap 63 of the storage tube are connected with the storage tube 62, so that the sample storage device forms a closed space, and then it is transferred for subsequent detection, and the sampling is completed, and the sampling ends.

The utility model provides a soil sampling device for geotechnical survey, which adopts different sampling probes for different soil structures, plans reasonable power optimization design, and improves energy utilization rate. Moreover, the sample storage device and the detection device in the rock soil sampling device are detachably connected. During the sampling process of the device, the soil sample directly enters the sample storage device. Sampling samples are transferred to other storage equipment for the second time, which can ensure the originality of samples to the greatest extent, improve the authenticity of subsequent testing experiments, and make use of the accurate formulation and precise implementation of construction plans.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", Orientation indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operation, and therefore cannot be construed as a limitation of the utility model.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (4)

1. A soil sampling device for geotechnical investigation, including an intelligent adjustment platform, a propulsion device, a transmission box, a power device, a probe device and a sample storage device; The intelligent adjustment platform includes a horizontal installation plate, a hydraulic support structure, an intelligent platform controller, and a universal level detector. One side of the horizontal installation plate is fixedly connected with the universal level detector and the intelligent The platform controller is fixedly connected with the hydraulic support structure on the other side, and the propulsion device is fixedly connected under the horizontal mounting plate; The propulsion device includes a propulsion system controller, a first hydraulic propulsion rod, a second hydraulic propulsion rod, a third hydraulic propulsion rod, a fourth hydraulic propulsion rod, a fifth hydraulic propulsion rod, a sixth hydraulic propulsion rod, and a seventh hydraulic propulsion rod. Propelling rod, the eighth hydraulic propelling rod, one end of the eight hydraulic propelling rods is installed on the horizontal mounting plate, and the other end is fixedly connected to the transmission box; The transmission box includes a first bearing support, a second bearing support, and a motor fixing support. The upper and lower surfaces of the transmission box are respectively installed with the first bearing support and the second bearing support, and The motor fixing support is arranged on the same side of the first bearing support, and the transmission box is equipped with a power device; The power device includes a motor, a first transmission gear, a second transmission gear, a first bearing, a second bearing, the motor is fixedly mounted on the motor fixed support, the first bearing and the second The bearings are installed in cooperation with the first bearing support and the second bearing support respectively, and the detecting device is installed in cooperation with the first bearing and the second bearing; The detecting device includes a detecting tube, a drilling probe, a pressure detecting probe, a shock absorbing tube, and a buffer pad. One end of the detecting tube has an inward groove structure, and the buffer pad is located on the The bottom of the groove structure, the outer surface of the shock absorbing tube coincides with the inner wall of the detecting tube, and one end surface of the shock absorbing tube is pressed and fitted with the buffer pad, and the detecting tube has a groove structure One end of the drill probe or the pressure probe is connected; The sample storage device includes a first end cap of the storage tube, a storage tube, and a second end cap of the storage tube, one end of the storage tube is threadedly connected to the probe tube, and the outer wall surface of the storage tube is connected to the inside of the shock absorbing tube. The wall surface coincides with the installation; The sample storage device is detachably connected to the detection device, and the first end cap of the storage tube and the second end cap of the storage tube can be fitted together at both ends of the storage tube. 2. A soil sampling device for geotechnical investigation according to claim 1, characterized in that: the first transmission gear and the second transmission gear are cylindrical helical gears, and the rotation of the cylindrical helical gears is 10. 3. A soil sampling device for geotechnical survey according to claim 1, characterized in that: the axis of the first bearing and the second bearing are collinear, and both are double-row tapered roller bearings. 4. A soil sampling device for geotechnical investigation according to claim 1, characterized in that: the axes of the eight hydraulic propulsion rods are perpendicular to the horizontal mounting plate, and the propulsion system controller is mounted on the horizontal mounting plate above.

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