Soil sampling device and method for geotechnical investigation

Abstract

The application discloses a kind of geotechnical investigation soil sampling device and method, it is related to the technical field of geotechnical investigation, it includes the hollow and the open drill cylinder of upper end, the transmission shaft is rotatably connected in the drill cylinder inner cavity, the drill cylinder inner cavity is provided with the sample storage assembly for storage sample, the sample storage assembly bottom is clamped in transmission shaft, the drill cylinder side wall is opened with the sampling port corresponding to sample storage assembly, the sample storage assembly is provided with handle bar, the handle bar extends drill cylinder, the drill cylinder encapsulates control module, the drill cylinder is located at the position of sampling port and is provided with sampling assembly, the sample storage assembly includes the sample storage cylinder arranged in the drill cylinder, the sample storage cylinder is opened with a plurality of sample storage grooves along its circumference, the sample storage groove cross section is arranged in fan shape, the sample storage groove corresponds to sampling port, the sample storage cylinder is provided with a plurality of closure assemblies for closing sample storage groove.The present application has the effect of continuous sampling, improves sampling efficiency.

Description

Technical Field

[0001] This application relates to the technical field of geotechnical investigation, and in particular to a soil sampling device and method for geotechnical investigation. Background Technology

[0002] During the investigation of high slopes in geotechnical engineering, it is necessary to monitor and evaluate the soil in various regions. The monitoring process can help to keep track of changes in soil composition in various places, and can help to deal with and prevent soil pollution in a timely manner, which is of great significance for protecting land resources. Soil sampling devices are required to collect soil samples during the geological exploration process.

[0003] Chinese Patent No. CN117949240A discloses a soil sampling device and its working method, comprising: a housing, a driving mechanism, a sampling mechanism, and a crushing mechanism; the driving mechanism is disposed within the housing and extends from the housing; the sampling mechanism is disposed on the driving mechanism; the crushing mechanism is disposed on the housing and the sampling mechanism passes through the crushing mechanism; the crushing mechanism is adapted to crush the soil sampled by the sampling mechanism; this achieves soil crushing during soil sampling, preventing soil accumulation within the sampling mechanism and facilitating subsequent removal of the soil from the sampling mechanism.

[0004] However, after the above-mentioned sampling device collects soil, the soil needs to be removed from the sampling mechanism before soil sampling can be carried out at the next survey site. This requires repeated collection and sampling steps, which increases the collection time of operators and affects efficiency. Summary of the Invention

[0005] To improve sampling efficiency, this application provides a soil sampling device and method for geotechnical investigation.

[0006] Firstly, this application provides a soil sampling device for geotechnical investigation, which adopts the following technical solution: A soil sampling device for geotechnical exploration includes a hollow drill cylinder with an open upper end. A drive shaft is rotatably connected to the bottom of the drill cylinder's inner cavity. A sample storage component for storing samples is disposed within the drill cylinder's inner cavity. The bottom of the sample storage component is snapped into the drive shaft. A sampling port corresponding to the sample storage component is opened on the side wall of the drill cylinder. The sample storage component is provided with a handle that extends out of the drill cylinder. A control module is encapsulated in the drill cylinder. A sampling component is disposed at the sampling port position on the drill cylinder. The control module is electrically connected to the sampling component. The sample storage component includes a sample storage cylinder disposed within the drill cylinder. The sample storage cylinder has several sample storage slots opened along its circumference. The sample storage slots have a fan-shaped cross-section and correspond to the sampling port. The sample storage cylinder is provided with several closing components for closing the sample storage slots. When the sample storage cylinder is removed from the drill cylinder, the closing components cooperate with the drill cylinder to close the closing components within the sample storage slots.

[0007] Optionally, the closing assembly includes a closing plate slidably connected to the sample storage cylinder at the sample storage trough. A limiting component for limiting the closing plate is provided at the upper end of the sample storage cylinder and at the sample storage trough. When the sample storage cylinder samples, the limiting component is engaged with the lower end of the closing plate and restricts the closing plate from closing the sample storage trough. A rotating ring is rotatably connected to the upper end of the drill cylinder. A plurality of extension blocks for abutting the closing plate are fixedly connected along the circumference of the inner side of the rotating ring. The plurality of extension blocks are arranged one-to-one with the closing plate and can abut against the upper end of the closing plate. An avoidance groove for the extension blocks to pass through is opened at the position between two adjacent sample storage troughs of the sample storage cylinder.

[0008] Optionally, the sample storage cylinder has a through groove, and the limiting component includes a spring fixedly connected in the through groove. The spring is fixedly connected to a limiting block, and the upper and lower edges of the limiting block are chamfered. The lower end of the closing plate has a limiting groove for the limiting block to engage with, and the upper and lower edges of the limiting groove can abut against the chamfer of the limiting block.

[0009] Optionally, the sampling assembly includes a sampling lever rotatably connected to the side of the sampling port of the drill barrel, and the drill barrel is equipped with a motor that drives the sampling lever to rotate through a rotating shaft structure. The motor is electrically connected to the control module.

[0010] Optionally, a pressure sensor is installed at the upper end of the sampling plate. The pressure sensor is used to detect the pressure exerted by the soil above on its upper end when the sampling plate moves upward and outputs pressure data. An ultrasonic sensor is installed on the side wall of the sampling plate facing the inner cavity of the drill barrel. The ultrasonic sensor is used to detect whether there is soil in the sample storage tank and outputs a detection signal. The pressure sensor and the ultrasonic sensor are electrically connected to the control module, wherein the control module is configured as follows: Acquire the pressure data output by the pressure sensor and the detection signal output by the ultrasonic sensor; Based on the pressure data output by the pressure sensor, when the pressure data meets the preset maximum threshold, the motor controls the sampling baffle to rotate toward the inner cavity of the drill barrel. Based on the detection signal output by the ultrasonic sensor, when the detection signal meets the preset reset conditions, the motor controls the sampling dial to reset.

[0011] Optionally, the upper end of the drive shaft is tapered, and several protruding ridges are fixedly connected to the upper end of the drive shaft. The lower surface of the sample storage cylinder is provided with a groove for the protruding ridges to engage.

[0012] Optionally, the upper surface of the sample storage cylinder is engraved with marking numbers at the location of each sample storage slot.

[0013] Secondly, this application provides a soil sampling method for geotechnical investigation, which adopts the following technical solution: A method for soil sampling in geotechnical investigation, comprising sampling soil using a soil sampling device as described in any of the above descriptions.

[0014] In summary, this application includes the following beneficial technical effects: by rotating the sample storage cylinder, each sample storage tank can be aligned with the sampling port in sequence. Under the action of the sampling component, the soil is pushed into the sample storage tank, thereby enabling continuous sampling at different sampling locations. After all sampling is completed, the closing component can close the sample storage tank, and then the sample storage cylinder can be taken out from the drill cylinder. The operator can take out the soil from all the sample storage tanks in sequence for analysis at one time, thereby improving sampling efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0016] Figure 2 This is a schematic diagram of the internal structure of the sample storage cylinder in an embodiment of this application.

[0017] Figure 3 This is a structural diagram of the control module in an embodiment of this application.

[0018] Figure 4 This is a schematic diagram of the structure of the limiting component in an embodiment of this application.

[0019] Figure 5 This is a schematic diagram of the rotating ring structure in an embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Drill barrel; 11. Drive shaft; 2. Sample storage assembly; 21. Sample storage cylinder; 12. Protruding ridge; 22. Sample storage groove; 23. Sampling port; 24. Handle; 3. Sampling assembly; 4. Control module; 5. Closing assembly; 31. Sampling lever; 32. Motor; 33. Pressure sensor; 34. Ultrasonic sensor; 51. Closing plate; 52. Limiting assembly; 521. Through groove; 522. Spring; 523. Limiting block; 524. Limiting groove; 525. Rotary ring; 526. Extension block; 527. Clearance groove. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0022] This application discloses a soil sampling device for geotechnical investigation.

[0023] Reference Figure 1 , Figure 2 and Figure 3 A soil sampling device for geotechnical exploration includes a hollow drill cylinder 1 with an open upper end. A drive shaft 11 is rotatably connected to the bottom of the drill cylinder 1's inner cavity via a bearing. A sample storage assembly 2 is disposed within the drill cylinder 1, comprising a sample storage cylinder 21 housed within the drill cylinder 1. The upper end of the drive shaft 11 is tapered and integrally formed with several protruding ribs 12. A groove is formed on the lower surface of the sample storage cylinder 21 for engaging the protruding ribs 12, facilitating placement of the sample storage cylinder 21 onto the drive shaft 11. Several sample storage slots 22 are formed along the circumference of the sample storage cylinder 21, with a fan-shaped cross-section. A sampling port 23 is formed on the side wall of the drill cylinder 1, which can correspond to any of the sample storage slots 22. A handle 24 is welded to the upper end of the sample storage cylinder 21, extending from the upper end of the drill cylinder 1. A sampling component 3 is installed at the sampling port 23 in the drill barrel 1. The drill barrel 1 is encapsulated with a control module 4, which is electrically connected to the sampling component 3. The sample storage cylinder 21 is provided with several closing components 5 for closing the sample storage tank 22. When the sample storage cylinder 21 is removed from the drill barrel 1, the closing components 5 cooperate with the drill barrel 1 to close the sample storage tank 22 and prevent soil spillage.

[0024] Reference Figure 1 and Figure 3The sampling assembly 3 includes a sampling deflector 31 hinged to the side of the sampling port 23 of the drill barrel 1. The drill barrel 1 is fitted with a motor 32 that drives the sampling deflector 31 to rotate via a rotating shaft structure. The motor 32 is electrically connected to the control module 4. The sampling deflector 31 can push soil into the sample storage tank 22. A pressure sensor 33 is installed on the upper end of the sampling deflector 31, and an ultrasonic sensor 34 is installed on the side wall of the sampling deflector 31 facing the inner cavity of the drill barrel 1. The pressure sensor 33 and the ultrasonic sensor 34 are electrically connected to the control module 4. The pressure sensor 33 detects the pressure exerted by the soil above the upper end of the sampling deflector 31 when it moves upward and outputs pressure data. The ultrasonic sensor 34 detects whether there is soil in the sample storage tank 22 and outputs a detection signal. The control module 4 is configured as follows: Acquire the pressure data output by pressure sensor 33 and the detection signal output by ultrasonic sensor 34; Based on the pressure data output by the pressure sensor 33, when the pressure data meets the preset maximum threshold (pressure value), the motor 32 controls the sampling baffle 31 to rotate toward the inner cavity of the drill barrel 1. Based on the detection signal output by the ultrasonic sensor 34, when the detection signal meets the preset reset conditions, the motor 32 controls the sampling dial 31 to reset.

[0025] Reference Figure 1 and Figure 2 Specifically, before sampling, the sample storage cylinder 21 is rotated to align any one of the sample storage slots 22 with the sampling port 23, and the sampling baffle 31 is in its initial state (the sampling baffle 31 is set radially along the drill cylinder 1 and the sampling port 23 is not closed). Then, the drill cylinder 1 is inserted into the soil to a suitable depth, but the upper surface of the drill cylinder 1 should be above the soil surface. At this time, the sampling baffle 31 is simultaneously inserted into the soil. Then, during the process of pulling the drill cylinder 1 upward, the soil above the sampling baffle 31 will exert gravity on the pressure sensor 33. When the pressure data detected by the pressure sensor 33 exceeds the preset maximum pressure value, the motor 32 drives the sampling baffle 31 to rotate toward the inner cavity of the drill cylinder 1, pushing the soil from the sampling port into the sample storage slot 22. At this time, the sampling baffle 31 closes the sampling port 23, and the operator can remove the drill cylinder 1 from the soil and transfer it to the next location where sampling is required.

[0026] Secondly, the transmitter of the ultrasonic sensor 34 is installed inside the sampling plate 31, and the receiver of the ultrasonic sensor 34 is installed on the inner wall of the sample storage tank 22. After moving to the next sampling location, the operator can rotate the sample storage cylinder 21 and align the empty sample storage tank 22 with the sampling port 23. The ultrasonic sensor 34 can detect that there is no soil in the sample storage tank 22. At this time, the motor 32 controls the sampling plate 31 to reset and open. The operator inserts the drill cylinder 1 into the soil to change to a new sampling location. The operator repeats the above steps to perform sampling.

[0027] Reference Figure 2 and Figure 4 In order to facilitate the removal of soil from the sample storage cylinder 21 after all sampling sites have been sampled, the closing component 5 includes a closing plate 51 that is longitudinally slidably connected to the upper end of the sample storage cylinder 21 and located at the sample storage trough 22. The closing plate 51 is arc-shaped, and a limiting component 52 for limiting the closing plate 51 is provided at the upper end of the sample storage cylinder 21 and located at the sample storage trough 22. The sample storage cylinder 21 has a transverse groove 521. The limiting component 52 includes a spring 522 fixedly installed in the groove 521. The spring 522 is fixed with a horizontal limiting block 523. The limiting block 523 is slidably connected in the groove 521. One end of the limiting block 523 extends out of the groove 521 and its upper and lower edges are chamfered. The lower end of the closing plate 51 and the side wall facing the sample storage tank 22 have a limiting groove 524 for the limiting block 523 to engage. The upper and lower edges of the limiting groove 524 can abut against the chamfer of the limiting block 523. Thus, during the soil sampling process, the closing plate 51 will not close the sample storage tank 22 under the limiting action of the limiting block 523, and thus will not affect the sampling plate 31 from pushing the soil into the sample storage tank 22.

[0028] Reference Figure 2 , Figure 4 and Figure 5 The upper end of the drill cylinder 1 is rotatably connected to a rotating ring 525 via a bearing. Several extension blocks 526 are fixedly attached to the inner side of the rotating ring 525 along its circumference. The number of extension blocks 526 corresponds one-to-one with the number of closing plates 51, and they abut against the upper end of the closing plates 51. When the sample storage cylinder 21 needs to be removed after sampling at all sampling locations, it can be moved upwards. The lower surfaces of the extension blocks 526 abut against the upper end of the closing plate 51. Because the edge of the limiting groove 524 abuts against the chamfer at the end of the limiting block 523, the limiting block 523 compresses the spring 522, and the limiting block 523 moves out of the limiting groove 524. During the upward movement of the sample storage cylinder 21, the closing plate 51 gradually closes the sample storage tank 22. After the closing plate 51 completely closes the sample storage tank 22, in order to close the sample storage tank... The composite plate 51 can be freed from the restriction of the extension block 526. The sample storage cylinder 21 is provided with a clearance groove 527 between two adjacent sample storage tanks 22, allowing the extension block 526 to pass through. By rotating the rotating ring 525, the extension block 526 can be aligned with the clearance groove 527, and the extension block 526 can be moved away from above the closing plate 51. Then the sample storage cylinder 21 can be smoothly removed from the drill cylinder 1. After that, the operator can slide up each closing plate 51 in sequence to remove the soil from each sample storage tank 22 for soil testing and analysis.

[0029] To facilitate recording the soil samples from different locations, the upper surface of the sample cylinder 21 is marked with numbers at the location of each sample sample 22 (not shown in the figure).

[0030] This application also discloses a soil sampling method for geotechnical investigation.

[0031] A method for soil sampling in geotechnical investigation, which uses the soil sampling device described above to sample the soil.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A soil sampling device for rock and soil exploration, characterized in that: The device includes a hollow drill cylinder (1) with an open top. A drive shaft (11) is rotatably connected to the bottom of the inner cavity of the drill cylinder (1). A sample storage component (2) for storing samples is provided in the inner cavity of the drill cylinder (1). The bottom of the sample storage component (2) is snapped into the drive shaft (11). A sampling port (23) corresponding to the sample storage component (2) is opened on the side wall of the drill cylinder (1). A handle (24) is provided on the sample storage component (2). The handle (24) extends out of the drill cylinder (1). A control module (4) is encapsulated in the drill cylinder (1). A sampling component (3) is provided at the sampling port (23) of the drill cylinder (1). The control module (4) is electrically connected to the sampling component (3). The sample storage component (2) includes a sample storage cylinder (21) disposed in the drill cylinder (1). The sample storage cylinder (21) has several sample storage slots (22) opened along its circumference. The sample storage slots (22) are arranged in a fan shape. The sample storage slots (22) correspond to the sampling port (23). The sample storage cylinder (21) is provided with several closing components (5) for closing the sample storage slots (22). When the sample storage cylinder (21) is taken out from the drill cylinder (1), the closing components (5) cooperate with the drill cylinder (1) to close the closing components (5) in the sample storage slots (22). The closing assembly (5) includes a closing plate (51) slidably connected to the sample storage cylinder (21) at the sample storage tank (22). A limiting assembly (52) for limiting the closing plate (51) is provided at the upper end of the sample storage cylinder (21) and at the sample storage tank (22). When the sample storage cylinder (21) samples, the limiting assembly (52) engages with the lower end of the closing plate (51) and restricts the closing plate (51) from closing the sample storage tank (22). The drill cylinder (1) The upper end is rotatably connected to a rotating ring (525). The inner side of the rotating ring (525) is fixedly connected with a plurality of extension blocks (526) for abutting against the closing plate (51). The plurality of extension blocks (526) are arranged one-to-one with the closing plate (51) and are used to abut against the upper end of the closing plate (51). The sample storage cylinder (21) is provided with a clearance groove (527) for the extension blocks (526) to pass through at the position between two adjacent sample storage tanks (22). The sampling assembly (3) includes a sampling lever (31) rotatably connected to the side of the sampling port (23) of the drill barrel (1). The drill barrel (1) is equipped with a motor (32) that drives the sampling lever (31) to rotate through a rotating shaft structure. The motor (32) is electrically connected to the control module (4). A pressure sensor (33) is installed on the upper end of the sampling plate (31). The pressure sensor (33) is used to detect the pressure exerted by the soil above on the upper end of the sampling plate (31) when it moves upward and outputs pressure data. An ultrasonic sensor (34) is installed on the side wall of the sampling plate (31) facing the inner cavity of the drill barrel (1). The ultrasonic sensor (34) is used to detect whether there is soil in the sample storage tank (22) and outputs a detection signal. The pressure sensor (33) and the ultrasonic sensor (34) are electrically connected to the control module (4), wherein the control module (4) is configured as follows: Acquire the pressure data output by the pressure sensor (33) and the detection signal output by the ultrasonic sensor (34); Based on the pressure data output by the pressure sensor (33), when the pressure data meets the preset maximum threshold, the motor (32) controls the sampling plate (31) to rotate toward the inner cavity of the drill barrel (1); Based on the detection signal output by the ultrasonic sensor (34), when the detection signal meets the preset reset conditions, the motor (32) controls the sampling dial (31) to reset.

2. The soil sampling device for rock and soil exploration according to claim 1, characterized in that: The sample storage cylinder (21) has a through groove (521). The limiting component (52) includes a spring (522) fixedly connected in the through groove (521). The spring (522) is fixedly connected to a limiting block (523). The upper and lower edges of the limiting block (523) are chamfered. The lower end of the closing plate (51) has a limiting groove (524) for the limiting block (523) to engage. The upper and lower edges of the limiting groove (524) are used to abut against the chamfer of the limiting block (523).

3. The soil sampling device for rock and soil exploration according to claim 1, characterized in that: The upper end of the drive shaft (11) is tapered, and several protrusions (12) are fixedly connected to the upper end of the drive shaft (11). The lower surface of the sample storage cylinder (21) is provided with a groove for the protrusions (12) to engage.

4. The soil sampling device for rock and soil exploration according to claim 1, characterized in that: The upper surface of the sample storage cylinder (21) is marked with numbers at the positions of each sample storage tank (22).

5. A soil sampling method for rock and soil investigation, characterized in that: Soil samples are taken using the soil sampling device for geotechnical investigation as described in any one of claims 1-4.

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