An in-situ soil sampling device and method for ecological geological survey

Abstract

The application belongs to the technical field of geological exploration sampling equipment, in particular to an ecological geological survey undisturbed soil sampling device and a sampling method, which comprises a drilling pipe with open ends, the open end of the drilling pipe is designed as a conical shape, one end of the drilling pipe is connected with a driving cover through threads, and the driving cover is connected with a driving device; further comprising a segmented sampling assembly, the segmented sampling assembly is installed in the drilling pipe, and the segmented sampling assembly is used for segmenting and intercepting soil samples; a lifting assembly, the lifting assembly cooperates with the drilling pipe and the segmented sampling assembly, and is used for tightening a belt, the segmented sampling assembly is arranged, the movement of the belt and the elastic film is used to segment the soil in multiple sample tubes, so that the undisturbed soil is divided into multiple segments, the deformation of the elastic film is used to separate the multiple segments of the undisturbed soil, thereby reducing the distortion probability of the undisturbed soil and enhancing the real reference value of the test results.

Description

Technical Field

[0001] This invention belongs to the technical field of geological exploration and sampling equipment, specifically a device and method for sampling undisturbed soil in ecological geological surveys. Background Technology

[0002] Currently, my country is vigorously promoting the construction of ecological civilization. At the same time, in order to improve the understanding of the interaction between ecosystems and the geological environment and support the utilization of land space and the protection and restoration of ecosystems, new requirements have been put forward for geological survey work. In ecological geological surveys, collecting undisturbed soil samples from weathering zones, vadose zones, parent materials, and soils, and measuring parameters such as bulk density, water content, and electrical conductivity of the undisturbed soil samples, is one of the important means to analyze local landform changes in detail.

[0003] When sampling undisturbed soil in multi-layered geological environments such as weathering zones, vadose zones, and parent materials, drilling is usually used. Under the action of external power, the sampler is inserted into the ground, and the soil layer is sampled using the inner cavity of the sampler to form a cylindrical soil sample. However, in actual operation, it has been found that when the soil structure is relatively loose, the porosity is large, and the content of non-cohesive soil is high, the soil and sand are easily mixed and disturbed during the soil sample extraction process. In addition, the soil at the bottom of the sampler is easy to fall off, resulting in poor sample integrity and poor preservation of the structure between multiple soil layers.

[0004] In related technologies, in order to reduce disturbance to the sample during the sampling process and enhance the integrity of the sample, the sampler is usually modified so that its bottom closes after sampling, thereby completely removing the sample from the inner cavity of the sampler. However, after the sample is removed, due to the lack of control over the sample, the multiple soil layers on the vertical surface are easily subjected to external forces before the sample is tested, resulting in soil mixing, water evaporation, and transfer, which leads to inaccurate undisturbed soil samples and a decline in the credibility of the samples, which is not conducive to accurate analysis and understanding of local geological characteristics. In view of this, the present invention proposes an undisturbed soil sampling device and sampling method for ecological geological surveys to solve the above-mentioned technical problems.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the present invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes an undisturbed soil sampling device and sampling method for ecological geological surveys.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the present invention provides an original soil sampling device for ecological geological survey, which includes a drilling pipe with openings at both ends. One end of the drilling pipe has a constricted opening design, and the other end is connected to a drive cover by a thread. The drive cover is externally connected to a drive device. It also includes a segmented sampling component, which is installed inside the drilling pipe and is used to extract soil samples in segments. The segmented sampling assembly includes multiple sample tubes, all of which are thin-walled transparent tubes with openings at both ends, and the diameter of the sample tubes is larger than the diameter of the constricted end of the drill tube. An elastic membrane is fixedly installed on two adjacent sample tubes. The elastic membrane is made of an elastic film. The sample tube is fixedly installed on the outer wall of the sample tube, the end of the strap is located inside the extension tube, and the middle of the strap extends to the outside of the elastic membrane. The drilling tube is provided with a groove corresponding to the extension tube. A tightening block is slidably installed in the inner cavity of the extension tube, and all the straps are fixedly connected to the tightening block; The cutting channel is formed by the gaps between the ends of multiple sample tubes connected by an elastic membrane. In the initial state, the middle part of the strap is aligned with the cutting channel. The lifting assembly, which works in conjunction with the drilling pipe and the segmented sampling assembly, is used to tighten the strap.

[0008] Specifically, the elastic membrane and the extension tube are symmetrically installed on both sides of the sample tube, and the elastic membrane and the extension tube are arranged alternately. The two ends of the strap extend into two adjacent extension tubes respectively.

[0009] Specifically, the elastic membrane has a through hole in the middle, the through hole is parallel to the cutting channel, and the strap passes through the through hole in the middle.

[0010] Specifically, the extension tube is the same length as the sample tube, one end of the extension tube has a slot, and the other end is fixedly installed with a block. Two adjacent extension tubes are connected by the slot and the block.

[0011] Specifically, adhesive strips are fixedly installed at both ends of the elastic membrane. The adhesive strips are designed to be parallel to the through holes, and release paper is pasted on the surface of the adhesive strips in the initial state.

[0012] Specifically, the sample tube is engraved with scale lines, which are used to assist in the adhesion of the elastic film.

[0013] Specifically, the lifting assembly includes a linkage rope, which is fixedly connected to the tightening block; The top cover is slidably installed inside the drilling pipe, and the top cover is sleeved on the top of the sample tube. The linkage rope is fixedly connected to the top cover. A top rod is engaged with the top cover. The top rod has a T-shaped design on the side away from the top cover. A one-way groove is provided on the drive cover. The one-way groove has a sloping side and a straight side. The end of the top rod away from the top cover is engaged with the one-way groove.

[0014] Specifically, each tightening block is provided with a connecting groove, and the linkage rope is fixedly installed with equally spaced locking beads. The diameter of the locking beads is larger than the diameter of the connecting groove. The extension tube is fixedly installed with inclined spring pieces, which are located on the movement path of the locking beads.

[0015] Specifically, the push rod is made of a spring telescopic rod, used to match the distance between the sample tube and the drive cover.

[0016] A method for undisturbed soil sampling in ecological geological surveys, comprising the following steps: A1: Mark the sampling location, then transport the sampling equipment to the sampling location, manually connect multiple sample tubes and extension tubes to each other, insert the card block into the card slot during connection, so that multiple sample tubes are connected into a whole. A2: The staff manually peels off the release paper on the surface of the adhesive strip and sticks the elastic film onto the sample tube. When sticking, the edge of the elastic film is aligned with the scale on the sample tube. A3: Place the top cover on the sample tube port at the top, then align the linkage rope fixed on the top cover with the connecting groove on the tightening block, and manually press the linkage rope to press it into the connecting groove. A4: Insert the assembled sample tube, top cap, and top rod into the inner cavity of the drilling tube, with the top rod away from the constricted end of the drilling tube. Then, thread the drilling tube to the drive cover and insert the drilling tube into the sampling position under the push of the drive device. A5: When the drilling tube reaches the preset depth, manually rotate the drive cover. Under the action of friction between the drive cover and the top rod, the top rod and the top cover will rotate, thereby pulling the linkage rope, tightening block, strap, and elastic membrane to cut off multiple sample tubes. A6: Remove the drill pipe from underground, loosen the connection between the drive cover and the drill pipe, and then remove the combination of the top cover and sample tube, transport it to the testing station, thus completing the original soil sampling operation.

[0017] The beneficial effects of this invention are as follows: 1. The present invention discloses an undisturbed soil sampling device and method for ecological geological surveys. By setting up a segmented sampling component, after drilling, the soil in multiple sample tubes is divided into multiple segments by the movement of the strap and elastic membrane, thus dividing the undisturbed soil into multiple segments. At the same time, the deformation of the elastic membrane is used to separate the multiple segments of undisturbed soil. During transportation, the presence of the elastic membrane can effectively avoid the chance of interaction and mixing between multiple segments of undisturbed soil. At the same time, the presence of the elastic membrane can also prevent the flow of moisture, easily evaporable and volatile substances in the undisturbed soil between multiple segments, thereby reducing the chance of distorted undisturbed soil and enhancing the true reference value of the test results.

[0018] 2. The undisturbed soil sampling device and sampling method for ecological geological surveys described in this invention adopts an adhesive connection method to fix the elastic membrane to the sample tube. This not only makes the operation more convenient and efficient, but also allows staff to expose the sampling channel by peeling off the elastic membrane after the undisturbed soil is collected in the sample tube and transported to the testing site, thereby enabling sampling and testing from the sampling channel and further enhancing the ease of use of the equipment. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a partial structural diagram of the present invention; Figure 2 This is a perspective view of the sample tube of the present invention; Figure 3 This is a partial structural diagram of the lifting component; Figure 4 This is a cross-sectional view of the extension tube; Figure 5 It is a 3D diagram of the elastic membrane; Figure 6 This is an overall sectional view of the present invention; Figure 7 It is an assembly drawing of the push rod and the drive cover; Figure 8 This is a flowchart of the method of the present invention; In the diagram: 1. Drilling tube; 11. Drive cover; 12. One-way groove; 2. Sample tube; 21. Elastic membrane; 22. Strap; 23. Extension tube; 24. Slide groove; 25. Tightening block; 26. Cutting channel; 3. Through hole; 4. Slot; 41. Locking block; 42. Adhesive strip; 5. Linkage rope; 51. Top cover; 52. Top rod; 53. Connecting groove; 54. Locking bead; 55. Spring piece. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 8 As shown, the present invention provides an undisturbed soil sampling device for ecological geological surveys, comprising a drilling pipe 1 with openings at both ends. One end of the drilling pipe 1 has a constricted opening design, and the other end is connected to a drive cover 11 via a threaded connection. The drive cover 11 is externally connected to a drive device. It also includes a segmented sampling component, which is installed inside the drilling pipe 1 and is used to extract soil samples in segments. The segmented sampling assembly includes multiple sample tubes 2, all of which are thin-walled transparent tubes with openings at both ends, and the diameter of the sample tube 2 is larger than the diameter of the constricted end of the drill tube 1. Elastic membrane 21 is fixedly installed on two adjacent sample tubes 2. The elastic membrane 21 is made of elastic film. The sample tube 2 has a strap 22 and an extension tube 23. The extension tube 23 is fixedly installed on the outer wall of the sample tube 2. The end of the strap 22 is located inside the extension tube 23, and the middle of the strap 22 extends to the outside of the elastic membrane 21. The drilling tube 1 has a groove 24 corresponding to the extension tube 23. Tightening block 25: Tightening block 25 is slidably installed in the inner cavity of extension tube 23, and all straps 22 are fixedly connected to tightening block 25; Cutting channel 26: After multiple sample tubes 2 are connected by elastic membrane 21, the gaps between their ends form cutting channel 26. In the initial state, the middle part of the strap 22 is aligned with cutting channel 26. The lifting assembly, which works in conjunction with the drilling pipe 1 and the segmented sampling assembly, is used to tighten the strap 22; In ecological geological surveys, it is often necessary to conduct shallow drilling sampling at multiple points in the survey area to obtain undisturbed soil samples. These samples are then transported to a testing institution for physicochemical property analysis of the undisturbed soil, which includes multiple layers of soil such as weathering zone, vadose zone, and parent material. This analysis provides a reference for the ecological geological survey. During the undisturbed soil sampling process, a segmented sampling assembly is first assembled, then inserted into the drill pipe 1. The drive cover 11 and the drill pipe 1 are then threaded together. The external drive equipment is then activated, and driven by the equipment, the drive cover 11 and the drill pipe 1 drill into the soil layer. In the process of assembling the component into segments, multiple sample tubes 2 are removed and coaxially aligned. Then, an elastic membrane 21 is used to sequentially fix and connect the multiple sample tubes 2, ensuring that there is a uniform interval between them, forming the cutting channel 26. After the sample tubes 2 are assembled, they are filled into the inner cavity of the drilling tube 1. Since one end of the drilling tube 1 is constricted and the diameter of the constricted portion is smaller than the diameter of the sample tubes 2, after filling, the drive cover 11 is reattached to the end of the drilling tube 1. Under the push of an external drive device, the drilling tube... 1. Drilling deeper into the soil layer. During drilling, the soil in the opening of the drilling pipe 1 moves into the inner cavity of the drilling pipe 1 and then enters the sample tube 2. As the drilling depth increases, the amount of soil collected in the sample tube 2 gradually increases. In this invention, there is a depth mark on the outer wall of the drilling pipe 1. Therefore, when the drilling depth of the drilling pipe 1 reaches the preset depth, drilling stops and the lifting assembly is activated. The lifting assembly operates, driving the tightening block 25 to move inside the extension tube 23. The movement of the tightening block 25 pulls on the strap 22, and the middle of the strap 22 is located outside the elastic membrane 21. Therefore, the strap 22 pulls the elastic membrane 21 into the interception channel 26. During the movement, the strap 22 and the elastic membrane 21 separate the soil in the interception channel 26. On the one hand, the soil in the sample tube 2 is separated from the soil outside. On the other hand, the soil in multiple sample tubes 2 is separated. After the soil is separated, the driving device is used to take the drilling tube 1 out from the ground. After the driving cover 11 is separated from the drilling tube 1, the sample tube 2 in the inner cavity of the drilling tube 1 is taken out and directly transported to the sample tube 2 connected as one piece, thus completing the original soil sampling operation.

[0023] This invention, by setting up a segmented sampling component, after drilling is completed, uses the movement of the strap 22 and the elastic membrane 21 to segment the soil in multiple sample tubes 2, causing the undisturbed soil to be divided into multiple segments. At the same time, the deformation of the elastic membrane 21 is used to separate the multiple segments of undisturbed soil. During transportation, the presence of the elastic membrane 21 can effectively avoid the chance of interaction and mixing between the multiple segments of undisturbed soil. At the same time, the presence of the elastic membrane 21 can also prevent the flow of moisture, easily evaporable and volatile substances in the undisturbed soil between the multiple segments of undisturbed soil, thereby reducing the chance of distortion of the undisturbed soil and enhancing the true reference value of the test results.

[0024] In a preferred embodiment of the present invention, the elastic membrane 21 and the extension tube 23 are symmetrically installed on both sides of the sample tube 2, and the elastic membrane 21 and the extension tube 23 are arranged alternately. The two ends of the strap 22 extend into the two adjacent extension tubes 23 respectively. By symmetrically distributing the elastic membrane 21 and extension tube 23 on both sides of the sample tube 2, and alternating between the elastic membrane 21 and extension tube 23, when the lifting assembly pulls the tightening block 25, the two tightening blocks 25 simultaneously pull the two ends of the strap 22, causing the two straps 22 to move from both sides of the cutting channel 26 toward the middle of the sample tube 2. During this process, the elastic membrane 21 deforms and moves simultaneously with the straps 22. When the two straps 22 converge in the middle of the sample tube 2, they block the cutting channel 26, thus preventing the two straps from moving. The two elastic membranes 21 work simultaneously, moving from both sides of the sample tube 2 toward the center, which can accelerate the sealing efficiency of the cutting channel 26. The two elastic membranes 21 work together to seal half of the cutting channel 26, reducing the deformation of the elastic membranes 21. On the other hand, when there are stones or hard objects in the cutting channel 26, the two elastic membranes 21 work separately. When the movement of the strap 22 is hindered, the cutting channel 26 can be cut and separated as much as possible, enhancing the separation effect of the elastic membranes 21 on both sides of the cutting channel 26.

[0025] In a preferred embodiment of the present invention, the elastic membrane 21 has a through hole 3 in the middle, the through hole 3 is parallel to the cutting channel 26, and the strap 22 passes through the through hole 3 in the middle; By setting a through hole 3 and extending the strap 22 through the through hole 3, the strap 22 and the elastic membrane 21 are tightly bonded. When the strap 22 is subjected to tension, the strap 22 can drive the elastic membrane 21 to move. During equipment assembly, the extension tube 23, the tightening block 25, the strap 22 and the elastic membrane 21 are in a connected state. After the sample tube 2 is docked, it is only necessary to fix the elastic membrane 21 on the sample tube 2, which reduces the difficulty of assembling the sampling equipment.

[0026] In a preferred embodiment of the present invention, the extension tube 23 is the same length as the sample tube 2, one end of the extension tube 23 is provided with a slot 4, and the other end is fixedly installed with a block 41. Two adjacent extension tubes 23 are connected by the slot 4 and the block 41. When connecting two sample tubes 2, insert the locking block 41 on the adjacent extension tube 23 into the locking slot 4, thereby locking the multiple extension tubes 23 into a whole. The sample tubes 2 fixed in the middle of the extension tubes 23 are arranged at equal intervals under the support of the extension tubes 23, making it easy for the staff to fix the two ends of the elastic membrane 21 to the two adjacent sample tubes 2 respectively, further enhancing the convenience of sample tube 2 assembly. Moreover, when the sampling equipment is not assembled, the separate design of multiple sample tubes 2 can reduce the convenience of transportation and storage of sampling equipment components.

[0027] In a preferred embodiment of the present invention, adhesive strips 42 are fixedly installed at both ends of the elastic membrane 21. The adhesive strips 42 are designed to be parallel to the through hole 3. In the initial state, release paper is pasted on the surface of the adhesive strips 42. During assembly, the release paper on the adhesive strip 42 is torn off, and then the elastic membrane 21 is pressed onto the sample tube 2. Under the adhesive action of the adhesive strip 42, the elastic membrane 21 is fixed to the sample tube 2. The elastic membrane 21 and the sample tube 2 are fixedly connected by an adhesive method, which is not only convenient and easy to operate, but also allows the staff to expose the sampling channel 26 by peeling off the elastic membrane 21 after the undisturbed soil is collected in the sample tube 2 and transported to the testing site. This further enhances the convenience of using the equipment. It should be noted that the elastic membrane 21 and the adhesive strip 42 used in this invention are both transparent materials, so it is easy for the staff to directly observe the undisturbed soil collected in the sample tube 2.

[0028] In a preferred embodiment of the present invention, the sample tube 2 is engraved with scale lines, which are used to assist in the adhesion of the elastic film 21; The graduation lines are evenly distributed at both ends of the sample tube 2. When it is necessary to attach the elastic membrane 21 to the sample tube 2, the staff aligns the edge of the elastic membrane 21 with the graduation lines and then presses the elastic membrane 21 onto the sample tube 2. The presence of the graduation lines can effectively enhance the standardization of the installation of the elastic membrane 21. At the same time, in actual application, due to the difference in soil environment in the area to be sampled, the staff can choose to pull the elastic membrane 21 when attaching it after roughly estimating the looseness of the surface soil, so that the edge of the elastic membrane 21 is aligned with different graduation lines. This causes the elastic membrane 21 to undergo elastic deformation after being fixed, thereby increasing the tension of the elastic membrane 21. When the original soil enters the inner cavity of the sample tube 2, the taut elastic membrane 21 can prevent the soil from flowing outward from the interception channel 26.

[0029] In a preferred embodiment of the present invention, the lifting assembly includes a linkage rope 5, which is fixedly connected to the tightening block 25. Top cover 51, which is slidably installed inside the drilling tube 1, and is sleeved on the top of the sample tube 2; the linkage rope 5 is fixedly connected to the top cover 51. Top rod 52 is engaged with the top cover 51. The top rod 52 has a T-shaped design on the side away from the top cover 51. The drive cover 11 has a one-way groove 12 with a sloping side and a straight side. The end of the top rod 52 away from the top cover 51 is engaged with the one-way groove 12. Once the drilling pipe 1 has reached the expected depth when inserted into the ground, it is important to understand that the driving equipment used in this invention provides a driving force perpendicular to the ground to the driving cover 11, such as an impact drilling machine. The operator manually rotates the driving cover 11. When the driving cover 11 rotates, the top rod 52, which is engaged with the driving cover 11 through the one-way groove 12, rotates synchronously. The top cover 51, which is engaged with the bottom end of the top rod 52, rotates accordingly. When the top cover 51 rotates, it pulls the linkage rope 5. Since the linkage rope 5 and the tightening block 25 are fixedly connected, the linkage rope 5 pulls multiple tightening blocks 25 to move synchronously, thereby creating a pulling force on the strap 22. This causes the strap 22 to pull the elastic membrane 21, dividing and separating the cutting channel 26.

[0030] In a preferred embodiment of the present invention, each of the tightening blocks 25 is provided with a connecting groove 53, and the linkage rope 5 is fixedly installed with equally spaced locking beads 54, the diameter of the locking beads 54 being larger than the diameter of the connecting groove 53, and the extension tube 23 is fixedly installed with inclinedly arranged spring pieces 55, the spring pieces 55 being located on the movement path of the locking beads 54. After assembling sample tube 2, the top cover 51 is placed on the top of the uppermost sample tube 2. Then, the linkage rope 5 fixed to the top cover 51 is pulled into the extension tube 23, and the linkage rope 5 is pressed into the connecting groove 53 on the tightening block 25. When the linkage rope 5 pulls the tightening block 25 to move, the diameter of the retaining bead 54 on the linkage rope 5 is larger than the diameter of the connecting groove 53, causing the tightening block 25 to move synchronously when the linkage rope 5 moves. At the same time, the retaining bead 54 on the linkage rope 5 pushes the spring piece 55 during the movement, causing the spring piece 55 to undergo elastic deformation and the retaining bead... 54 passes over the spring 55, and after the strap 22 and elastic membrane 21 have separated the cutting channel 26, the operator rotates the drive cover 11 again, so that the drive cover 11 is tightly connected to the drilling tube 1. Then, under the drive of the drive device, the drilling tube 1 is pulled out. During this process, due to the tilted setting of the spring 55, when the locking bead 54 pushes the spring 55 in the opposite direction, the gap between the spring 55 closes, which causes the linkage rope 5 to be unable to move in the opposite direction, thereby maintaining the tension of the tightening block 25 on the strap 22 and maintaining the separation of the elastic membrane 21 from the inner cavity of the adjacent sample tube 2.

[0031] In a preferred embodiment of the present invention, the top rod 52 is made of a spring telescopic rod and is used to match the distance between the sample tube 2 and the drive cover 11. The diameter of the sample tube 2 is larger than the diameter of the constricted end of the drill tube 1. After the assembled sample tube 2 and top cover 51 are placed into the drilling tube 1, the bottom end of the sample tube 2 is restricted by the constricted end of the drilling tube 1. Then, the push rod 52 is engaged with the top of the top cover 51. Next, the drive cover 11 is screwed onto the drilling tube 1. The threaded connection causes the drive cover 11 to connect with the drilling tube 1. During this process, the push rod 52, under the action of its internal spring, is inserted into the one-way groove 12. At this time, the rotation direction of the drive cover 11 is opposite to the direction of the inclined surface of the one-way groove 12. Therefore, when the drive cover 11 rotates, the top end of the one-way groove 12 contacts the inclined surface of the one-way groove 12. Under the action of the inclined surface, the push rod 52... The compression and disengagement from the one-way groove 12 are achieved. When the drive cover 11 rotates in the opposite direction, the push rod 52 comes into direct contact with the one-way groove 12, causing the drive cover 11 to push the push rod 52 to rotate, thereby pulling the linkage rope 5. At the same time, the presence of the push rod 52 allows for the elastic adjustment of the distance between the top cover 51 and the drive cover 11. Within the extension and retraction range of the push rod 52, the number of sample tubes 2 can be flexibly adjusted, thereby adjusting the overall length of the assembled sample tubes 2. Through the elastic extension and retraction of the push rod 52, the top end of the assembled sample tube 2 is limited. In conjunction with the narrowing of the drill tube 1, the assembled sample tube 2 is fixed.

[0032] A method for undisturbed soil sampling in ecological geological surveys, comprising the following steps: A1: Mark the sampling location, then transport the sampling equipment to the sampling location, manually connect multiple sample tubes 2 and extension tubes 23 to each other, and insert the card block 41 into the card slot 4 during connection to connect multiple sample tubes 2 into a whole. A2: The staff manually peels off the release paper on the surface of the adhesive strip 42 and sticks the elastic film 21 onto the sample tube 2. When sticking, the edge of the elastic film 21 is aligned with the scale line on the sample tube 2. A3: Place the top cover 51 on the sample tube 2 port at the top, then align the linkage rope 5 fixedly connected to the top cover 51 with the connecting groove 53 on the tightening block 25, manually press the linkage rope 5 to press the linkage rope 5 into the connecting groove 53. A4: Insert the assembled sample tube 2, top cover 51, and top rod 52 into the inner cavity of the drilling tube 1, with the top rod 52 away from the constricted end of the drilling tube 1. Then, thread the drilling tube 1 to the drive cover 11. Under the push of the drive device, insert the drilling tube 1 into the sampling position. A5: When the drilling tube 1 reaches the preset depth, manually rotate the drive cover 11. Under the action of friction between the drive cover 11 and the top rod 52, the top rod 52 and the top cover 51 will rotate, thereby pulling the linkage rope 5, tightening block 25, strap 22 and elastic membrane 21, and cutting off multiple sample tubes 2. A6: Remove the drilling pipe 1 from underground, loosen the connection between the drive cover 11 and the drilling pipe 1, and then remove the combination of the top cover 51 and the sample tube 2 and transport it to the testing station to complete the sampling of the original soil.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An undisturbed soil sampling device for ecological geological survey, comprising a drilling pipe (1) with openings at both ends, wherein one end of the drilling pipe (1) is designed with a constricted opening and the other end is connected to a drive cover (11) by a thread, and the drive cover (11) is externally connected to a drive device. Its features are: It also includes a segmented sampling component, which is installed inside the drilling pipe (1) and is used to segment the soil sample. The segmented sampling assembly includes multiple sample tubes (2), all of which are thin-walled transparent tubes with openings at both ends, and the diameter of the sample tubes (2) is larger than the diameter of the constricted end of the drilling tube (1). Elastic membrane (21): An elastic membrane (21) is fixedly installed on two adjacent sample tubes (2). The elastic membrane (21) is made of elastic film. The sample tube (2) has a strap (22) and an extension tube (23). The extension tube (23) is fixedly installed on the outer wall of the sample tube (2). The end of the strap (22) is located inside the extension tube (23), and the middle part of the strap (22) extends to the outside of the elastic membrane (21). The drilling tube (1) has a groove (24) corresponding to the extension tube (23). Tightening block (25): Tightening block (25) is slidably installed in the inner cavity of the extension tube (23), and the straps (22) are all fixedly connected to the tightening block (25); Cutting channel (26): After multiple sample tubes (2) are connected by an elastic membrane (21), the gap between their ends constitutes the cutting channel (26). In the initial state, the middle part of the strap (22) is aligned with the cutting channel (26). The extension tube (23) is the same length as the sample tube (2). One end of the extension tube (23) is provided with a slot (4) and the other end is fixedly installed with a block (41). Two adjacent extension tubes (23) are connected by the slot (4) and the block (41). Both ends of the elastic membrane (21) are fixedly installed with adhesive strips (42). The adhesive strips (42) are designed to be parallel to the through hole (3). In the initial state, the surface of the adhesive strips (42) is covered with release paper. The lifting assembly, which works in conjunction with the drilling pipe (1) and the segmented sampling assembly, is used to tighten the strap (22); The lifting assembly includes a linkage rope (5), which is fixedly connected to the tightening block (25); Top cover (51), the top cover (51) is slidably installed inside the drilling pipe (1), the top cover (51) is sleeved on the top of the sample tube (2), and the linkage rope (5) is fixedly connected to the top cover (51); Top rod (52), the top cover (51) is snapped with top rod (52), the top rod (52) is T-shaped on the side away from the top cover (51), the drive cover (11) is provided with a one-way groove (12), the one-way groove (12) is designed with a sloping side and a straight side, the end of the top rod (52) away from the top cover (51) is snapped with the one-way groove (12); Each tightening block (25) is provided with a connecting groove (53). The linkage rope (5) is fixedly installed with equally spaced locking beads (54). The diameter of the locking beads (54) is larger than the diameter of the connecting groove (53). The extension tube (23) is fixedly installed with inclined spring pieces (55). The spring pieces (55) are located on the movement path of the locking beads (54).

2. The undisturbed soil sampling device for ecological geological surveys according to claim 1, characterized in that: The elastic membrane (21) and the extension tube (23) are symmetrically installed on both sides of the sample tube (2), and the elastic membrane (21) and the extension tube (23) are arranged alternately. The two ends of the strap (22) extend into the two adjacent extension tubes (23).

3. The undisturbed soil sampling device for ecological geological surveys according to claim 2, characterized in that: The elastic membrane (21) has a through hole (3) in the middle, the through hole (3) is parallel to the cutting channel (26), and the strap (22) passes through the through hole (3) in the middle.

4. The undisturbed soil sampling device for ecological geological surveys according to claim 3, characterized in that: The sample tube (2) has scale lines engraved on it, which are used to assist in the adhesion of the elastic film (21).

5. The undisturbed soil sampling device for ecological geological surveys according to claim 4, characterized in that: The top rod (52) is made of a spring telescopic rod and is used to match the distance between the sample tube (2) and the drive cover (11).

6. A method for sampling undisturbed soil in ecological geological surveys, characterized in that: The undisturbed soil sampling method for ecological geological surveys is applicable to the undisturbed soil sampling device for ecological geological surveys described in any one of claims 1-5. Includes the following steps: A1: Mark the sampling location, then transport the sampling equipment to the sampling location, manually connect multiple sample tubes (2) and extension tubes (23) to each other, and insert the card block (41) into the card slot (4) during connection so that multiple sample tubes (2) are connected into a whole. A2: The staff manually peels off the release paper on the surface of the adhesive strip (42) and sticks the elastic film (21) onto the sample tube (2). When sticking, the edge of the elastic film (21) is aligned with the scale on the sample tube (2). A3: Place the top cover (51) on the sample tube (2) port at the top, then align the linkage rope (5) fixedly connected to the top cover (51) with the connecting groove (53) on the tightening block (25), manually press the linkage rope (5) to press the linkage rope (5) into the connecting groove (53); A4: Insert the assembled sample tube (2), top cover (51), and top rod (52) into the inner cavity of the drilling tube (1), with the top rod (52) away from the constricted end of the drilling tube (1). Then connect the drilling tube (1) to the drive cover (11) by thread. Under the push of the drive device, insert the drilling tube (1) into the sampling position. A5: When the drilling tube (1) reaches the preset depth, manually rotate the drive cover (11). Under the action of friction between the drive cover (11) and the top rod (52), the top rod (52) and the top cover (51) will rotate, thereby pulling the linkage rope (5), tightening block (25), strap (22), and elastic membrane (21) to cut off multiple sample tubes (2). A6: Take the drilling pipe (1) out from underground, loosen the connection between the drive cover (11) and the drilling pipe (1), and then take out the combination of the top cover (51) and the sample tube (2) and transport it to the testing station to complete the original soil sampling operation.

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