Soil hole drawing device and working method thereof

Abstract

The invention discloses a soil hole drawing device and a working method thereof. A supporting part is used as a supporting structure in the pre-burying process; the bamboo slip cylinder is wrapped outside the supporting part; lubricating liquid is coated between the bamboo slip cylinder and the supporting part during embedding; the connecting part is used for pulling out the supporting part from the interior of soil during hole drawing, at the moment, due to the fact that friction force between the bamboo slip cylinder and the supporting part is small, and the outer surface of the bamboo slip cylinder adsorbs surrounding soil with high water content, the bamboo slip cylinder can be kept at the original position in the pulling-out process, and after the supporting part is pulled out, the supporting part can be pulled out; the supporting part is not in direct contact with surrounding soil, so that the stability of the surrounding soil is not influenced by the hole drawing; and after completion, stripping each bamboo slip strip of the bamboo slip cylinder from the inner wall of the hole in sequence and taking out the bamboo slip strip, thereby finally forming the required hole. According to the method, holes can be rapidly formed in the soil with high water content from the inner direction and the outer direction according to requirements under the condition that the soil layer stability is not damaged, and the corresponding requirements are met.

Description

Technical Field

[0001] The present invention belongs to the field of soil testing, and specifically relates to a soil hole extraction device and a working method thereof, which are mainly used for quickly generating holes in water-containing soil simulation tests. Background Art

[0002] Karst collapse is influenced by numerous factors and has an extremely complex mechanism. Karst collapse simulation tests can be used to study and observe the geological hazards of deep urban karst collapse, which are induced by human engineering activities and natural conditions. During karst collapse tests, holes are created to lower probes through the holes to observe the development of karst caves and to simulate the impact of urban tunnels on karst. Because the test soil has high moisture content and high viscosity, creating holes directly through excavation or drilling can affect the geological stability of the test caves and soil, thereby affecting the accuracy of the observation data.

[0003] There are also some soil extraction equipment currently available, such as the application number: 2021108477080, titled: A soil sampling device for saline-alkali soil pollution remediation equipment and its drilling method, which sucks the soil into the collection shell through an elliptical suction hole, a drilling tube, and a suction tube. Multiple soil samples can be collected by moving the auxiliary soil sampling mechanism. After the drilling tube is screwed into the soil layer to the set depth, the drive motor rotates in the opposite direction, and the soil sampling structure in the main soil sampling mechanism pops out to complete the sampling operation of soil samples at different depths. In addition, the application number is 2016205192549, titled: A multifunctional wetland soil sampling device, which can solve the problem of high water content in wetland soil and soil detachment when the soil sample is extracted.

[0004] However, none of the above existing solutions can quickly generate a test hole in soil with a relatively high moisture content without destroying the stability of the soil layer. Moreover, the above solutions all generate holes from the outside to the inside, and cannot generate holes from the inside to the outside, thus failing to meet the required requirements.

[0005] Therefore, how to provide a new drilling device and method that can quickly generate holes from both internal and external directions as needed in soil with relatively high moisture content without destroying the stability of the soil layer is the research direction required by the present invention. Summary of the Invention

[0006] In response to the problems existing in the above-mentioned prior art, the present invention provides a soil hole-drilling device and a working method thereof, which can quickly generate holes from both internal and external directions as needed in soil with a relatively high moisture content without destroying the stability of the soil layer, thereby meeting corresponding needs. At the same time, the device has a simple structure and is easy to operate.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: a soil hole extraction device, comprising a support part, a bamboo tube and a connecting part,

[0008] The support portion includes a support end group and a support bar. The support end group includes two support discs. The two support discs are coaxially arranged and fixedly connected by the support bar.

[0009] The bamboo tube includes a plurality of bamboo strips, which are evenly distributed outside the support portion, and adjacent bamboo strips are connected by soft wires, so that the bamboo tube wraps the outside of the support portion;

[0010] The connecting part is connected to one end of the supporting part. When in use, the supporting part and the bamboo tube are pre-buried in the soil. The supporting part is pulled out from the soil through the connecting part, and then the bamboo tube is taken out to realize soil drilling.

[0011] Furthermore, the device includes a drive unit and a fixed bracket. The drive unit is a through-type guide rail motor, comprising a motor body and a drive screw. The motor body is mounted on the fixed bracket, and the drive screw passes through the motor body. One end of the drive screw is connected to the connecting portion. When extracting the hole, the motor body drives the connecting portion outward via the drive screw, thereby extracting the support portion from the soil. Other methods can be used to apply an outward pulling force to the connecting portion, but the above method is preferred because it ensures stable outward movement of the support portion from the soil, ensuring the quality of the hole formed.

[0012] Furthermore, the supporting parts and bamboo tubes are both multiple, with adjacent bamboo tubes connected by flexible wires. Adjacent supporting parts can be connected or disconnected via detachable connectors, which include a connector kit and a connector plug, each of which is fixed to the surface of the supporting disc of two adjacent supporting parts. This connection method for the bamboo tubes facilitates subsequent removal, while the connection method for the supporting parts facilitates quick connection and disconnection.

[0013] Furthermore, the connection kit includes two sector blocks, each of which has an arc-shaped groove on its side; the connection plug-in includes two arc blocks, a gap is left between the arc blocks and the surface of the support disc, and one end of the arc block is fixed to the surface of the support disc through a connecting plate, so that the surface of the arc block is parallel to the surface of the support disc; when the two support parts are connected, the two arc blocks are respectively inserted into the arc grooves of the two sector blocks by rotating the two support parts relative to each other to achieve connection; when disassembling and separating, the two arc blocks are removed from the arc grooves of the two sector blocks by reverse rotation to achieve separation. Other structures of detachable connectors can be used, and the above structure is preferred, which can ensure fast and stable connection and disassembly between adjacent support parts and is easy to operate.

[0014] Furthermore, a lubricant is applied between the support portion and the bamboo tube to reduce the friction between the two contact parts. In this way, when the support portion is subsequently extracted from the soil, the bamboo tube remains in the soil to ensure the stability of the hole.

[0015] Furthermore, the support bar is an arc piece, and its arc diameter is the same as the diameter of the support disc; and the number of support bars is not less than 2, and multiple support bars are evenly distributed along the circumference of the support disc, and the curvature of each support bar should be less than 1 / 2π; the length of the support part is greater than 0.2 meters and not more than 0.5 meters; the bamboo slips are arc-shaped long strips made of arc-shaped bamboo boards, and the number is not less than 8, and the inner diameter of the bamboo slip tube is the same as the outer diameter of the support disc.

[0016] Furthermore, the connecting part includes a connecting shaft and a connecting sleeve, one end of the connecting shaft is equipped with a connecting plug-in for detachable connection with the support part; the other end of the connecting shaft is coaxially connected to the transmission screw through the connecting sleeve.

[0017] Furthermore, the fixing bracket includes at least three legs, and the height of the legs should be less than the length of the transmission screw and greater than the length of a single support portion, so as to ensure smooth operation of the hole extraction.

[0018] The working method of the soil drilling device to form holes from the inside out is as follows:

[0019] Step 1: Preparing the soil drilling device: Before using the soil drilling device, coaxially secure at least two support parts with detachable connectors and apply lubricant to the outside of each support part. Then, sleeve a bamboo tube onto the outside of each support part, and connect adjacent bamboo tubes with flexible wires. Pre-bury the support part and bamboo tube combination into the desired position in the soil test bench. Then, fill the soil test bench until it reaches the desired position, with one end of one of the support parts exposed from the soil.

[0020] Step 2: Hole extraction: When extracting the hole, coaxially connect the connecting part to one end of the supporting part exposed to the soil, then apply a pulling force to the connecting part to move the two supporting parts outward until the two supporting parts are completely extracted from the soil; during this process, the hole is gradually formed from the inside of the soil to the outside;

[0021] Step 3: Forming the hole: After the hole is drawn, the bamboo tube is attached to the inner wall of the hole. Finally, the bamboo strips of the bamboo tube are manually peeled off the inner wall of the hole and the bamboo tube is pulled out. Since adjacent bamboo tubes are connected by soft wires, each bamboo tube can be pulled out of the hole in turn, and finally the required hole is made.

[0022] The working method of the soil drilling device to form holes from the outside to the inside is as follows:

[0023] Step 1: Preparation before drilling: Before using the soil drilling device, select at least two support parts and apply lubricant to the outside of each support part. Then, set a bamboo tube on the outside of each support part, and make sure that adjacent bamboo tubes are not connected to each other. Pre-bury each support part and bamboo tube combination into the desired position in the soil test bench, leaving adjacent support parts unconnected and maintaining a spacing of 0.5 to 1 cm. Then, fill the soil test bench until it reaches the desired position. After filling, the end of the support part closest to the outside of the soil must be exposed to the soil.

[0024] Step 2: Drilling: When drilling, the connecting part is coaxially connected to one end of the supporting part exposed to the soil, and then a pulling force is applied to the connecting part to drive the supporting part to move outward until the supporting part is completely pulled out of the soil; thereby, a hole is formed at the position where the supporting part was originally embedded; after the hole is drilled, the bamboo tube of the supporting part is attached to the inner wall of the hole, and finally, the bamboo strips of the bamboo tube are manually peeled off the inner wall of the hole, and the bamboo tube is pulled out;

[0025] Step 3: Continue to pump holes to form holes: Then coaxially connect the connecting part to one end of the deeper support part, and repeat the pumping work in step 2 to form the second section of holes. Repeat this process. In this process, holes are gradually formed from the outside of the soil to the inside, and finally the required holes are made.

[0026] Compared with the prior art, the present invention adopts a method of combining the support part, the bamboo tube and the connecting part, which has the following advantages:

[0027] 1. The support part of the present invention is composed of a support disc and a support bar, which is used as a support structure during the pre-embedding process, leaving space inside the bamboo tube for subsequent hole extraction; the bamboo tube is composed of a plurality of bamboo strips connected by soft wires, which are wrapped around the outside of the support part; and a lubricating liquid is applied between the bamboo tube and the support part during pre-embedding to reduce the friction between the two; the connecting part is used to connect with one end of the support part through the connecting part and apply a pulling force outward to pull the support part out from the soil. At this time, since the friction between the bamboo tube and the support part is small, and the outer surface of the bamboo tube is adsorbed by the surrounding soil with a high water content, the bamboo tube can maintain its original position during the extraction of the support part. In this way, when the support part is extracted to form a preliminary hole, since the support part is not in direct contact with the surrounding soil, the hole extraction will not affect the stability of the surrounding soil; after completion, the individual bamboo strips of the bamboo tube are peeled off the inner wall of the hole in turn to reduce the adsorption force between the bamboo strips and the surrounding soil with a high water content, and then the bamboo tube is removed, thereby finally forming the desired hole.

[0028] 2. The present invention can gradually form holes from the inside of the soil to the outside as needed without destroying the stability of the soil layer in soil with a relatively high moisture content, or gradually form holes from the soil surface to the inside. Only the same equipment is required to meet the two hole-forming processes, thereby meeting the test requirements.

[0029] 3. The present invention has a simple structure, is easy to operate, and has good stability during the construction process, so it has wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the combination of the support portion and the bamboo tube in the present invention;

[0032] Figure 3 It is a structural schematic diagram of the support portion in the present invention;

[0033] (a) and (b) are three-dimensional schematic diagrams in different directions respectively;

[0034] Figure 4 It is a structural schematic diagram of the bamboo tube in the present invention;

[0035] Figure 5 It is a structural schematic diagram of the connecting portion of the present invention;

[0036] Figure 6 This is a schematic diagram of the installation of the connecting part, the driving part and the fixing bracket in the present invention;

[0037] Figure 7 It is a schematic diagram of the present invention using a soil hole pumping device to perform hole pumping.

[0038] In the figure: 1-support part, 11-connection kit, 12-support disc, 13-support bar, 14-connection plug-in, 2-bamboo tube, 21-bamboo bar, 3-connection part, 31-connection shaft, 32-connection sleeve, 4-driving part, 41-transmission screw, 42-motor body, 5-fixed bracket, 6-soil bin test bench. DETAILED DESCRIPTION

[0039] The present invention will be further described below.

[0040] like Figure 1 and 2 As shown, a soil hole extraction device includes a support portion 1, a bamboo tube 2 and a connecting portion 3, wherein the support portion 1 includes a support end group and a support bar 13, and the support end group includes two support discs 12, which are coaxially arranged and fixedly connected by the support bar 13; Figure 4As shown, the bamboo tube 2 comprises multiple bamboo strips 21 evenly distributed outside the support portion 1. Adjacent bamboo strips 21 are connected by a flexible cord, allowing the bamboo tube 2 to wrap around the support portion 1. A connecting portion 3 is connected to one end of the support portion 1. During use, the support portion 1 and bamboo tube 2 are pre-buried in the soil. The support portion 1 is extracted from the soil via the connecting portion 3, and then the bamboo tube 2 is removed to extract the soil hole. There are multiple support portions 1 and bamboo tubes 2, each connected by a flexible cord. Adjacent support portions 1 are connected or disconnected via a detachable connector, comprising a connecting sleeve 11 and a connecting plug 14, each secured to the support disc surface of two adjacent support portions 1. This connection method for the bamboo tubes 2 facilitates subsequent removal, while the connection method for the support portions 1 facilitates quick connection and disconnection between the two. A lubricant is applied between the support portion 1 and bamboo tube 2 to reduce friction at the contact point between them. In this way, when the supporting part 1 is subsequently pulled out from the soil, the bamboo tube 2 remains in the soil to ensure the stability of the hole.

[0041] In order to facilitate the extraction of holes, a driving part 4 and a fixed bracket 5 are also included. The driving part 4 is a through-type guide rail motor, which is an existing device including a motor body 42 and a transmission screw 41. The motor body 42 is mounted on the fixed bracket 5. The transmission screw 41 passes through the motor body 42. One end of the transmission screw 41 is connected to the connecting part 3. When the hole is extracted, the motor body 42 drives the connecting part 3 to move outward through the transmission screw 41, thereby extracting the support part 1 from the soil. Other methods can be used to apply an outward pulling force to the connecting part 3. The above method is preferred. This method can ensure that the support part 1 moves stably outward from the soil, ensuring the quality of the hole formed. Figure 3 As shown, the connection kit 11 includes two sector blocks, each of which has an arc-shaped groove on the side; the connection plug-in 14 includes two arc blocks, with a gap between the arc blocks and the surface of the support disc, and one end of the arc block is fixed to the surface of the support disc through a connecting plate, so that the surface of the arc block is parallel to the surface of the support disc; when the two support parts 1 are connected, the two arc blocks are respectively inserted into the arc grooves of the two sector blocks by rotating the two support parts 1 relative to each other to achieve connection; when disassembling and separating, the two arc blocks are removed from the arc grooves of the two sector blocks by reverse rotation to achieve separation. Other structures of detachable connectors can be used, and the above structure is preferred, which can ensure fast and stable connection and disassembly between adjacent support parts 1 and is easy to operate.

[0042] As an improvement of the present invention, the support bar 13 is an arc piece, and its arc diameter is the same as the diameter of the support disc 12; and the number of support bars is not less than 2, and multiple support bars 13 are evenly distributed along the circumference of the support disc 12, and the arc of each support bar 13 should be less than 1 / 2π; the length of the support portion 1 is greater than 0.2 meters and not more than 0.5 meters; and the diameter of the support disc 12 is not more than 0.2m; the bamboo strips 2 are arc-shaped long strips made of arc-shaped bamboo boards, and the number is not less than 8, and the inner diameter of the bamboo tube 2 is the same as the outer diameter of the support disc 12. Figure 5 As shown, the connecting portion 3 includes a connecting shaft 31 and a connecting sleeve 32. One end of the connecting shaft 31 is equipped with a connecting plug 14 for detachable connection with the support portion 1; the other end of the connecting shaft 31 is coaxially connected to the transmission screw 41 through the connecting sleeve 32. Figure 6 As shown, the fixing bracket 5 includes at least three legs, and the height of the legs should be less than the length of the transmission screw 41 and greater than the length of a single support portion 1. This can ensure the smooth progress of the hole extraction work.

[0043] like Figure 7 As shown, the working method of the soil hole pumping device to form holes from the inside out is as follows:

[0044] Step 1: Preparation before drilling: Before using the soil drilling device, fix at least two support parts 1 coaxially through detachable connectors, apply lubricant to the outside of each support part 1, then sleeve a bamboo tube 2 on the outside of each support part 1, and connect adjacent bamboo tubes 2 with soft wires; pre-bury the support part 1 and bamboo tube 2 combination into the soil test bench 6 at the desired position, and then fill the soil test bench 6 until it reaches the desired position. After filling, one end of one of the support parts 1 must be exposed from the soil;

[0045] Step 2: Hole extraction: When extracting holes, the fixed bracket 5 is fixed to the outer surface of the soil or the outer surface of the soil bin test bench 6, and the connecting part 3 is coaxially connected to one end of the support part 1 exposed to the soil. The driving part 4 is started to apply a pulling force to the connecting part 3 outward, and then the connecting part 3 drives the two support parts 1 to move outward until the two support parts 1 are completely extracted from the soil at one time. In this process, the hole is gradually formed from the inside of the soil to the outside (that is, when the support part 1 at the deepest position moves, the hole begins to form at its original position, and then the hole continues to form gradually from the inside to the outside as the extraction progresses).

[0046] Step 3: Forming the hole: After the hole is drawn, the bamboo tube 2 fits against the inner wall of the hole. Finally, the individual bamboo strips of the bamboo tube 2 are manually peeled off from the inner wall of the hole, and the bamboo tube 2 is pulled out. Since adjacent bamboo tubes 2 are connected by soft wires, each bamboo tube 2 can be pulled out of the hole in turn, and the desired hole is finally made.

[0047] The working method of the soil drilling device to form holes from the outside to the inside is as follows:

[0048] Step 1: Preparation before drilling: Before using the soil drilling device, select at least two support parts 1 and apply lubricating fluid to the outside of each support part 1. Then, set a bamboo tube 2 on the outside of each support part 1, and adjacent bamboo tubes 2 are not connected to each other; each support part 1 and bamboo tube 2 combination is pre-buried in the desired position in the soil bin test bench 6, with adjacent support parts 1 not connected to each other and maintaining a distance of 0.5 to 1 cm. Then, fill the soil bin test bench 6 with soil until it reaches the desired position, and after filling, the end of the support part 1 closest to the outside of the soil must be exposed to the soil;

[0049] Step 2: Drilling: When drilling, the fixing bracket 5 is fixed to the outer surface of the soil or the outer surface of the soil bin test bench 6, and the connecting part 3 is coaxially connected to the end of the support part 1 exposed to the soil. The driving part 4 is started, which applies a pulling force to the connecting part 3, so that the connecting part 3 drives the support part 1 to move outward until the support part 1 is completely extracted from the soil; thereby, a hole is formed at the originally embedded position of the support part 1; after the hole is drilled, the bamboo tube 2 of the support part 1 is attached to the inner wall of the hole, and finally, the individual bamboo strips 21 of the bamboo tube 2 are manually peeled off the inner wall of the hole, and the bamboo tube 2 is extracted;

[0050] Step 3, continue to pump holes to form holes: then coaxially connect the connecting part 3 to one end of the deeper support part 1 (or replace the longer connecting part 3 with the deep support part 1 as needed, for example, prepare connecting parts with a length of N times the length of the support part + 0.1 meters, N is a natural number and N is less than or equal to the number of buried support parts, so that different lengths of connecting parts 3 can be used to pump holes according to different depths), and repeat the pumping work of step 2 to form the second section of holes, and repeat this process. In this process, the holes are gradually formed from the outside to the inside of the soil (that is, the first section of the hole is closest to the outer surface of the soil, and then when each support part 1 is pulled out inward in turn, the holes are gradually formed from the outside to the inside), and finally the required holes are made.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A soil drilling device, characterized in that: It includes a supporting part, a bamboo tube and a connecting part. The support portion includes a support end group and a support bar. The support end group includes two support discs. The two support discs are coaxially arranged and fixedly connected by the support bar. The bamboo tube includes a plurality of bamboo strips, which are evenly distributed outside the support portion, and adjacent bamboo strips are connected by soft wires, so that the bamboo tube wraps the outside of the support portion; The connecting part is connected to one end of the supporting part. When in use, the supporting part and the bamboo tube are pre-buried in the soil. The supporting part is pulled out from the soil through the connecting part, and then the bamboo tube is taken out to realize soil drilling.

2. The soil drilling device according to claim 1, characterized in that: It also includes a driving part and a fixed bracket. The driving part is a through-type guide rail motor, which includes a motor body and a transmission screw. The motor body is installed on the fixed bracket. The transmission screw passes through the motor body. One end of the transmission screw is connected to the connecting part. When the hole is extracted, the motor body drives the connecting part to move outward through the transmission screw, and then the support part is pulled out of the soil.

3. The soil drilling device according to claim 1, characterized in that: There are multiple support parts and bamboo tubes, and adjacent bamboo tubes are connected by soft wires; adjacent support parts are connected or separated by detachable connecting parts, and the detachable connecting parts include a connecting kit and a connecting plug-in, which are respectively fixed on the support disc surfaces of two adjacent support parts.

4. The soil drilling device according to claim 3, characterized in that: The connection kit includes two sector blocks, each of which has an arc-shaped groove on its side; the connection plug-in includes two arc blocks, a gap is left between the arc blocks and the surface of the support disc, and one end of the arc block is fixed to the surface of the support disc through a connecting plate, so that the surface of the arc block is parallel to the surface of the support disc; when the two supporting parts are connected, the two arc blocks are respectively inserted into the arc grooves of the two sector blocks through relative rotation of the two supporting parts to achieve connection; when disassembling and separating, the two arc blocks are taken out of the arc grooves of the two sector blocks through reverse rotation to achieve separation.

5. The soil drilling device according to claim 1, characterized in that: Lubricating liquid is applied between the support portion and the bamboo tube to reduce the friction between the contact portions.

6. The soil drilling device according to claim 1, characterized in that: The support bar is an arc piece, and its arc diameter is the same as the diameter of the support disc; and the number of support bars is not less than 2, and multiple support bars are evenly distributed along the circumference of the support disc, and the curvature of each support bar should be less than 1 / 2π; the length of the support part is greater than 0.2 meters and not more than 0.5 meters; the bamboo slips are arc-shaped long strips made of arc-shaped bamboo boards, and the number is not less than 8, and the inner diameter of the bamboo slip tube is the same as the outer diameter of the support disc.

7. The soil drilling device according to claim 4, characterized in that: The connecting part includes a connecting shaft and a connecting sleeve. One end of the connecting shaft is equipped with a connecting plug for detachably connecting with the supporting part; the other end of the connecting shaft is coaxially connected to the transmission screw through the connecting sleeve.

8. A soil drilling device according to claim 2, characterized in that: The fixing bracket includes at least three legs, and the height of the legs should be less than the length of the transmission screw and greater than the length of a single supporting part.

9. A method for forming holes from the inside out using the soil drilling device according to any one of claims 1 to 8, characterized in that: The specific steps are: Step 1: Preparing the soil drilling device: Before using the soil drilling device, coaxially secure at least two support parts with detachable connectors and apply lubricant to the outside of each support part. Then, sleeve a bamboo tube onto the outside of each support part, and connect adjacent bamboo tubes with flexible wires. Pre-bury the support part and bamboo tube combination into the desired position in the soil test bench. Then, fill the soil test bench until it reaches the desired position, with one end of one of the support parts exposed from the soil. Step 2: Hole extraction: When extracting the hole, coaxially connect the connecting part to one end of the supporting part exposed to the soil, then apply a pulling force to the connecting part to move the two supporting parts outward until the two supporting parts are completely extracted from the soil; during this process, the hole is gradually formed from the inside of the soil to the outside; Step 3: Forming the hole: After the hole is drawn, the bamboo tube is attached to the inner wall of the hole. Finally, the bamboo strips of the bamboo tube are manually peeled off the inner wall of the hole and the bamboo tube is pulled out. Since adjacent bamboo tubes are connected by soft wires, each bamboo tube can be pulled out of the hole in turn, and finally the required hole is made.

10. A method for forming holes from outside to inside using the soil drilling device according to any one of claims 1 to 8, characterized in that: The specific steps are: Step 1: Preparation before drilling: Before using the soil drilling device, select at least two support parts and apply lubricant to the outside of each support part. Then, set a bamboo tube on the outside of each support part, and make sure that adjacent bamboo tubes are not connected to each other. Pre-bury each support part and bamboo tube combination into the desired position in the soil test bench, leaving adjacent support parts unconnected and maintaining a spacing of 0.5 to 1 cm. Then, fill the soil test bench until it reaches the desired position. After filling, the end of the support part closest to the outside of the soil must be exposed to the soil. Step 2: Drilling: When drilling, the connecting part is coaxially connected to one end of the supporting part exposed to the soil, and then a pulling force is applied to the connecting part to drive the supporting part to move outward until the supporting part is completely pulled out of the soil; thereby, a hole is formed at the position where the supporting part was originally embedded; after the hole is drilled, the bamboo tube of the supporting part is attached to the inner wall of the hole, and finally, the bamboo strips of the bamboo tube are manually peeled off the inner wall of the hole, and the bamboo tube is pulled out; Step 3: Continue to pump holes to form holes: Then coaxially connect the connecting part to one end of the deeper support part, and repeat the pumping work in step 2 to form the second section of holes. Repeat this process. In this process, holes are gradually formed from the outside of the soil to the inside, and finally the required holes are made.

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