A collapsible loess stratum deep hole detection device

Abstract

The application relates to a collapsible loess stratum deep hole detection device, belonging to the geological detection technical field, which comprises a sampling rod and a sampling assembly, the sampling assembly comprises a first sampling head and a second sampling head, one end of the first sampling head is connected with the sampling rod, an opening is arranged at the end of the first sampling head away from the sampling rod, a partition plate is arranged in the first sampling head, the first sampling head is divided into a containing cavity and a first sampling cavity by the partition plate, the second sampling head is located in the containing cavity, a first drive is connected between the second sampling head and the first sampling head, a one-way door is arranged at the opening of the first sampling head close to the second sampling head, the opening direction of the one-way door is away from the containing cavity, a guide ring is arranged at the end of the second sampling head away from the opening, a guide surface is formed between the second sampling head and the first drive, and the guide surface is used for guiding the one-way door when the second sampling head enters the containing cavity. The application has the effects of conveniently sampling the soil layer in the deep hole and conveniently observing the soil layer structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geological detection, in particular to a collapsible loess stratum deep hole detection device. BACKGROUND

[0002] Collapsible loess refers to soil that, under the action of overlying soil self-weight stress, or under the action of self-weight stress and additional stress, causes significant additional deformation due to the destruction of soil structure after being soaked. Collapsible loess is rapidly destroyed under a certain pressure after being soaked, and significant additional subsidence occurs.

[0003] In related technologies, when engineering construction is carried out on a collapsible loess foundation, the possible damage to the engineering caused by additional settlement due to foundation collapse needs to be considered, so it is necessary to drill a deep hole in the soil layer before construction, and a sampling rod is inserted into the deep hole for sampling. The sampling rod is a hollow cylindrical insertion rod.

[0004] In view of the above related technologies, the inventors believe that in the sampling process, the loess sample is prone to falling when the sampling rod is extracted, and the soil layer is prone to being damaged when the sampling rod is inserted into the soil layer, which is not convenient for observing the soil layer structure. SUMMARY

[0005] In order to facilitate sampling of the soil layer in the deep hole and observing the soil layer structure, the present application provides a collapsible loess stratum deep hole detection device.

[0006] The collapsible loess stratum deep hole detection device provided by the present application adopts the following technical scheme:

[0007] A collapsible loess stratum deep hole detection device, comprising a sampling rod and a sampling assembly, the sampling assembly comprising a first sampling head and a second sampling head, the first sampling head being connected to the sampling rod at one end, the first sampling head being provided with an opening at an end away from the sampling rod, the opening end of the first sampling head being provided with an inwardly inclined taper, the first sampling head being provided with a partition plate inside, the partition plate dividing the first sampling head into an accommodating cavity and a first sampling cavity from top to bottom, the second sampling head being located in the accommodating cavity, the second sampling head being connected to the first sampling head by a first drive, the second sampling head being provided with an opening at an end away from the first drive and the opening facing one of the side walls of the first sampling head, the first sampling head being provided with a one-way door at the opening close to the second sampling head, the opening direction of the one-way door being away from the accommodating cavity, the first drive being used to push the second sampling head to extend out of the one-way door and insert into the side wall of the deep hole, the second sampling head being provided with a guide ring at an end away from the opening, the guide ring forming a guide surface between the second sampling head and the first drive, the guide surface being used to guide the one-way door when the second sampling head enters the accommodating cavity.

[0008] By adopting the above technical solution, the sampling component is placed into the deep hole using a sampling rod, with the opening of the first sampling head facing the bottom of the deep hole. After the sampling rod is pressed and inserted for sampling, the first drive is activated. The first drive drives the second sampling head to extend out of the one-way gate and insert into the side wall of the deep hole. After the second sampling head takes a sample, the first drive is activated again, which drives the second sampling head to retract. When the second sampling head is retracted, the guide ring guides the one-way gate, reducing the possibility of the second sampling head getting stuck outside the one-way gate. When the second sampling head samples the side wall of the deep hole, it can reduce the compaction of the soil layer by the sampling component when sampling collapsible loess, increasing the possibility of preserving the soil structure. This makes it easier to sample the soil layer in the deep hole and to observe the soil structure.

[0009] Optionally, the second sampling head is rotatably connected to the first drive. The end of the second sampling head away from the first drive is provided with multiple serrations. The second sampling head is cylindrical. The second sampling head is provided with a second drive, which is used to drive the second sampling head to rotate. The rotation direction of the second sampling head is horizontal rotation.

[0010] By adopting the above technical solution, when the second sampling head samples the sidewall of the deep hole, the first drive drives the serrated end of the second driving head to contact the soil layer, and the second drive is activated. The second drive drives the second sampling head to rotate. While rotating, the first drive continues to push the second sampling head until the sampling is completed. The second drive reduces the possibility of compacting the soil layer when the second sampling head samples the soil layer of the deep hole sidewall.

[0011] Optionally, a connecting sleeve is provided between the second sampling head and the first drive. One end of the connecting sleeve is rotatably connected to the output end of the first drive, and the other end is connected to the second sampling head. The second drive includes a traction rope and a fixing block. The traction rope is wrapped around the periphery of the connecting sleeve. One end of the fixing block is connected to the side wall of the connecting sleeve, and the other end is connected to the traction rope. Both ends of the traction rope extend out of the sampling rod away from the first sampling head.

[0012] By adopting the above technical solution, when rotating the second sampling head, hold both ends of the traction rope and pull it back and forth. The traction rope drives the second sampling head to rotate in the forward or reverse direction, and the soil layer on the side wall of the deep hole is sampled in a rotating manner.

[0013] Optionally, the bottom of the first sampling head is provided with an observation component, which includes an observation tube. One end of the observation tube is detachably connected to the first sampling head, and the other end is detachably connected to a transparent cover plate.

[0014] By adopting the above technical solution, when it is necessary to image and observe the soil layer in the deep hole, the camera can be placed in the observation tube, the camera lens can be fixed inside the observation tube with the transparent cover plate facing it, and the observation component can be placed into the deep hole for observation using a sampling rod.

[0015] Optionally, the sampling rod includes a first lifting rod and a second lifting rod, both of which are hollow. The first lifting rod and the second lifting rod are coaxially arranged and slidably connected. A fixing member is provided on the first lifting rod to fix the first lifting rod and the second lifting rod.

[0016] By adopting the above technical solution, the first lifting rod and the second lifting rod are slidably connected and fixed, which facilitates the adjustment of the length of the sampling rod.

[0017] Optionally, the second lifting rod is sleeved on the outer periphery of the first lifting rod. The first lifting rod has a first placement cavity, and the second lifting rod has a second placement cavity near the first placement cavity. The end of the first placement cavity near the second lifting rod is connected to the end of the second placement cavity near the first lifting rod. A magnetic block is provided on the side wall of the second placement cavity away from the first placement cavity. The fixing component includes a limiting block and a pull rope. The limiting block is located in the first placement cavity and can slide laterally along the first placement groove. The limiting block is smaller than or equal to the size of the first placement cavity. The pull rope is connected to the end of the limiting block away from the second placement cavity.

[0018] By adopting the above technical solution, when removing the sampling component, pulling the rope upwards causes the limiting block to disengage from the magnetic block, and the limiting block to fully enter the first placement cavity. Continuing to pull the rope upwards causes the first lifting rod to rise upwards under the pull of the rope until the bottom end of the second lifting rod abuts against the top of the first sampling head. The second lifting rod rises along with the first sampling head. The first and second lifting rods are pulled out in sections, shortening the stroke of the lifting sampling rod and facilitating the extraction of the sampling rod from the deep hole.

[0019] Optionally, the first lifting rod is provided with a lifting ring, the peripheral sidewall of the lifting ring is connected to the inner sidewall of the first sampling ring, and a lifting rope is connected to the lifting ring.

[0020] By adopting the above technical solution, when the first lifting rod and the second lifting rod are released from their fixed positions, the lifting rope is pulled up, and the lifting rope drives the first lifting rod to rise until the sampling component is taken out of the deep hole, which facilitates the removal of the sampling component.

[0021] Optionally, the opening at the end of the first sampling head away from the first lifting rod is smaller than the opening at the end of the first sampling head near the first lifting rod, and the end of the first sampling head near the first lifting rod is provided with multiple guide vanes, one end of which extends out of the peripheral sidewall of the first sampling head.

[0022] By adopting the above technical solution, the end of the guide vane extending from the peripheral sidewall of the first sampling head can extend into the inner sidewall of the deep hole. The guide vane limits the first sampling head, improves the stability of the first sampling head in the deep hole, and facilitates the second sampling head to sample the inner sidewall of the deep hole.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By setting a first sampling head and a second sampling head, and the second sampling head being connected to the first sampling head via a first drive, the first sampling head samples the soil layer on the bottom wall of the deep hole, and the first drive drives the second sampling head to sample the soil layer on the side wall of the deep hole. The second sampling head can reduce the compaction of the coating in the vertical direction during sampling, thereby facilitating the sampling of the soil layer in the deep hole and facilitating the observation of the soil layer structure.

[0025] 2. By setting a second drive, the second drive rotates the second sampling head, which facilitates the insertion of the second sampling head into the inner wall of the deep hole during sampling, further reducing the compaction of the soil layer by the second sampling head and improving the preservation rate of the soil structure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a deep-hole detection device for collapsible loess strata according to an embodiment of this application.

[0027] Figure 2 This is a three-dimensional sectional view of a deep-hole detection device for collapsible loess strata according to an embodiment of this application.

[0028] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0029] Figure 4 This is a partial three-dimensional sectional view of a deep-hole detection device for collapsible loess strata according to an embodiment of this application.

[0030] Figure 5 This is a three-dimensional cross-sectional view from another perspective of a deep-hole detection device for collapsible loess strata according to an embodiment of this application.

[0031] Figure 6 This is a three-dimensional sectional view of the sampling component and the observation component in an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Sampling rod; 11. First lifting rod; 111. First placement cavity; 112. Lifting ring; 113. Lifting rope; 12. Second lifting rod; 121. Second placement cavity; 122. Magnetic block; 2. Sampling assembly; 21. First sampling head; 211. Partition plate; 212. Receiving cavity; 213. First sampling cavity; 22. Second sampling head; 221. Guide ring; 222. Guide surface; 23. First drive; 24. Second drive; 241. Traction rope; 242. Fixing block; 25. Connecting sleeve; 3. Fixing component; 31. Limiting block; 32. Pull rope; 4. One-way door; 41. Retaining ring; 5. Observation assembly; 51. Observation cylinder; 52. Transparent cover plate; 6. Guide leaf. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0034] This application discloses a deep-hole testing device for collapsible loess strata, referring to... Figure 1 It includes a sampling rod 1 and a sampling component 2. The sampling component 2 is connected to one end of the sampling rod 1. During sampling, the sampling component 2 is inserted into the deep hole through the sampling rod 1 for sampling and testing.

[0035] Reference Figure 2 and Figure 3 The sampling rod 1 includes a first lifting rod 11 and a second lifting rod 12. Both the first lifting rod 11 and the second lifting rod 12 are hollow cylindrical rods. The first lifting rod 11 and the second lifting rod 12 are coaxially arranged. The second lifting rod 12 is sleeved on the outer periphery of the first lifting rod 11 and can slide up and down. The first lifting rod 11 is provided with a fixing member 3, which is used to fix the first lifting rod 11 and the second lifting rod 12.

[0036] Furthermore, referring to Figure 3 , Figure 4 and Figure 5 The fixing component 3 includes a limiting block 31 and a pull rope 32. A first placement cavity 111 is provided on the first lifting rod 11, and a second placement cavity 121 is provided on the second lifting rod 12 near the first placement cavity 111. The limiting block 31 is located in the first placement cavity 111 and can slide laterally along the first placement groove. The limiting block 31 is less than or equal to the size of the first placement cavity 111. In this embodiment, the size of the limiting block 31 is the same as the size of the first placement cavity 111, and the limiting block 31 is a magnetic metal block. In this embodiment, it is an iron block. The pull rope 32 is welded to the end of the limiting block 31 away from the second placement cavity 121. When the first lifting rod 11 and the second lifting rod 12 are in the extended state, the end of the first placement cavity 111 near the second lifting rod 12 is connected to the end of the second placement cavity 121 near the first lifting rod 11. A magnetic block 122 is attached to the side wall of the second placement cavity 121 away from the first placement cavity 111. The limiting block 31 is attracted into the second placement cavity 121 under the action of the magnetic block 122. The size and length of the limiting block 31 are greater than the size of the second placement cavity 121. When the limiting block 31 is located in the second placement cavity, the end near the pull rope 32 can also be located in the first placement cavity 111, so that the limiting block 31 limits and fixes the first lifting rod 11 and the second lifting rod 12. When the limiting block 31 is released from fixing the first lifting rod 11 and the second lifting rod 12, the pull rope 32 is pulled to make the limiting block 31 completely enter the first placement cavity 111.

[0037] Reference Figure 3 , Figure 4 and Figure 5The first lifting rod 11 is also connected to a lifting ring 112. The peripheral wall of the lifting ring 112 is welded to the inner wall of the first sampling ring. A lifting rope 113 is welded to the lifting ring 112. When the lifting rope 113 is pulled upward, it can drive the first lifting rod 11 upward, thereby facilitating the lifting of the first lifting rod 11 to the outside of the deep hole. The pull rope 32, the lifting rope 113, and the traction rope 241 are all steel wire ropes.

[0038] Specifically, refer to Figure 5 and Figure 6 The sampling assembly 2 includes a first sampling head 21 and a second sampling head 22. One end of the first sampling head 21 is welded to the end of the first lifting rod 11 away from the second lifting rod 12. The end of the first sampling head 21 near the first lifting rod 11 is conical, and the end of the first sampling head 21 away from the first lifting rod 11 is cylindrical. The end of the first sampling head 21 away from the first lifting rod 11 has an opening, and the opening end of the first sampling head 21 has an inwardly inclined tapering end, and the opening end of the first sampling head 21 has a cutting edge. The edge and the cutting edge facilitate the insertion of the first sampling head 21 into the soil layer. A partition 211 is welded to the top of the cylindrical end of the first sampling head 21. The partition 211 divides the inside of the first sampling head 21 into a receiving cavity 212 and a first sampling cavity 213. The second sampling head 22 is located in the receiving cavity 212. A first drive 23 is connected between the second sampling head 22 and the first sampling head 21. The first drive 23 is fixedly connected to the receiving cavity 212 of the first sampling head 21 by a fixing plate. The first drive 23 is a cylinder.

[0039] Reference Figure 5 and Figure 6 The second sampling head 22 is rotatably connected to the first drive 23. The end of the second sampling head 22 away from the first drive 23 has an opening and the opening is far away from the first drive 23. The first sampling head 21 has a one-way door 4 near the opening of the second sampling head 22. The one-way door 4 is rotatably connected to the first sampling head 21 through a rotating shaft. A torsion spring is sleeved on the rotating shaft. One end of the torsion spring is welded to the rotating shaft and the other end is welded to the one-way door 4. The first sampling head 21 has a sampling port near the one-way door 4. A retaining ring 41 is integrally formed on the side of the sampling port near the first sampling head 21. This reduces the possibility of the one-way door 4 being subjected to external force and entering the receiving cavity 212, so that the opening direction of the one-way door 4 is far away from the receiving cavity 212.

[0040] Reference Figure 6The second sampling head 22 has multiple serrations at the end away from the first drive 23. The second sampling head 22 is cylindrical. A connecting sleeve 25 is provided between the second sampling head 22 and the first drive 23. One end of the connecting sleeve 25 is rotatably connected to the output end of the first drive 23 through a bearing, and the other end is welded to the end face of the second sampling head 22 away from its opening. A second drive 24 is connected between the second sampling head 22 and the first drive 23. The second drive 24 is used to drive the second sampling head 22 to rotate. The rotation direction of the second sampling head 22 is horizontal rotation.

[0041] Specifically, refer to Figure 6 The second drive 24 includes a traction rope 241 and a fixing block 242. The traction rope 241 is wound around the periphery of the connecting sleeve 25. One end of the fixing block 242 is welded to the side wall of the connecting sleeve 25, and the other end is welded to the traction rope 241. Both ends of the traction rope 241 extend out of the upper surface of the second lifting rod 12. The first drive 23 is used to push the second sampling head 22 out of the side wall of the one-way door 4 inserted into the deep hole. In order to reduce the possibility that the second sampling head 22 gets stuck between the one-way door 4 and the first sampling head 21, a guide ring 221 is welded to the end of the second sampling head 22 away from its opening. One end of the one-way ring is welded to the end of the second sampling head 22 near the connecting sleeve 25, and the other end is welded to the peripheral side wall of the connecting sleeve 25. The guide ring 221 forms a guide surface 222 between the second sampling head 22 and the first drive 23. The guide surface 222 is a conical surface that is inclined from the second sampling head 22 toward the connecting sleeve 25. The guide surface 222 is used to guide the one-way door 4 when the second sampling head 22 enters the receiving cavity 212.

[0042] As an alternative implementation, the second drive 24 can also be a motor. In this embodiment, in order to promptly sense the sampling status of the second sampling head 22 during sampling, the second drive 24 is configured to be installed with a traction rope 241 and a fixing block 242.

[0043] Reference Figure 6 The bottom of the first sampling head 21 is also provided with an observation component 5, which includes an observation cylinder 51. One end of the observation cylinder 51 is threadedly connected to the first sampling head 21, and the other end is threadedly connected to a transparent cover plate 52 through a fixing ring. Four guide vanes 6 are welded to one end of the first sampling head 21 near the first lifting rod 11. One end of each of the four guide vanes 6 extends out of the peripheral sidewall of the first sampling head 21 and is set as a spike. The four guide vanes 6 are arranged circumferentially along the axial direction of the first sampling head 21, and the ends of the four guide vanes 6 near the first sampling head 21 are welded to the top surface of the first sampling head 21.

[0044] The implementation principle of a deep-hole testing device for collapsible loess strata in this application embodiment is as follows: When sampling the soil layer in the deep hole, the first lifting rod 11 and the second lifting rod 12 are fixed using the fixing component 3. After fixing, the sampling component 2 is placed into the deep hole. When the open end of the first sampling head 21 abuts against the bottom wall of the deep hole, the top of the second lifting rod 12 is pushed to insert the first sampling head 21 into the soil layer. The first drive 23 is activated, and the first drive 23 drives the second sampling head 22 to extend out of the one-way gate 4 and abut against the side wall of the deep hole. The traction rope 241 is repeatedly pulled. 41 drives the connecting sleeve 25 to rotate, and the connecting sleeve 25 drives the second sampling head 22 to rotate, so that the second sampling head 22 can sample the side wall of the deep hole. After sampling, the second sampling head 22 is retracted, and the pull rope 32 is pulled. The pull rope 32 pulls the limiting block 31 into the first placement cavity 111. The lifting rope 113 is pulled upward to lift the first lifting rod 11 first. During the lifting process, the first lifting rod 11 drives the second lifting rod 12 to move upward together with the first lifting rod 11 until the sampling component 2 is taken out of the deep hole, so as to facilitate the sampling of the soil layer in the deep hole and the observation of the soil layer structure.

[0045] 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 deep-hole testing device for collapsible loess strata, characterized in that: The sample assembly includes a sampling rod (1) and a sampling component (2). The sampling component (2) includes a first sampling head (21) and a second sampling head (22). One end of the first sampling head (21) is connected to the sampling rod (1). The end of the first sampling head (21) away from the sampling rod (1) has an opening. The opening end of the first sampling head (21) has an inwardly inclined constriction. A partition (211) is provided inside the first sampling head (21). The partition (211) divides the inside of the first sampling head (21) into a receiving cavity (212) and a first sampling cavity (213). The second sampling head (22) is located inside the receiving cavity (212). A first drive (23) is connected between the second sampling head (22) and the first sampling head (21). The first sampling head (21) has an opening at one end away from the first drive (23) and the opening faces one of the side walls of the first sampling head (21). The first sampling head (21) has a one-way door (4) at the opening near the second sampling head (22). The opening direction of the one-way door (4) is away from the receiving cavity (212). The first drive (23) is used to push the second sampling head (22) out of the one-way door (4) and insert it into the side wall of the deep hole. The second sampling head (22) has a guide ring (221) at one end away from its opening. The guide ring (221) forms a guide surface (222) between the second sampling head (22) and the first drive (23). The guide surface (222) is used to guide the one-way door (4) when the second sampling head (22) enters the receiving cavity (212). The second sampling head (22) is rotatably connected to the first drive (23). The end of the second sampling head (22) away from the first drive (23) is provided with multiple serrations. The second sampling head (22) is cylindrical. The second sampling head (22) is provided with a second drive (24). The second drive (24) is used to drive the second sampling head (22) to rotate. The rotation direction of the second sampling head (22) is horizontal rotation. A connecting sleeve (25) is provided between the second sampling head (22) and the first drive (23). One end of the connecting sleeve (25) is rotatably connected to the output end of the first drive (23), and the other end is connected to the second sampling head (22). The second drive (24) includes a traction rope (241) and a fixing block (242). The traction rope (241) is wrapped around the periphery of the connecting sleeve (25). One end of the fixing block (242) is connected to the side wall of the connecting sleeve (25), and the other end is connected to the traction rope (241). Both ends of the traction rope (241) extend out of the sampling rod (1) away from the first sampling head (21).

2. The deep-hole testing equipment for collapsible loess strata according to claim 1, characterized in that: The first sampling head (21) is provided with an observation component (5) at the bottom. The observation component (5) includes an observation tube (51). One end of the observation tube (51) is detachably connected to the first sampling head (21), and the other end is detachably connected to a transparent cover plate (52).

3. The deep-hole testing equipment for collapsible loess strata according to claim 1, characterized in that: The sampling rod (1) includes a first lifting rod (11) and a second lifting rod (12). Both the first lifting rod (11) and the second lifting rod (12) are hollow. The first lifting rod (11) and the second lifting rod (12) are coaxially arranged and can be slidably connected. The first lifting rod (11) is provided with a fixing member (3), which is used to fix the first lifting rod (11) and the second lifting rod (12).

4. The deep-hole testing equipment for collapsible loess strata according to claim 3, characterized in that: The second lifting rod (12) is sleeved on the outer periphery of the first lifting rod (11). The first lifting rod (11) has a first placement cavity (111). The second lifting rod (12) has a second placement cavity (121) near the first placement cavity (111). The end of the first placement cavity (111) near the second lifting rod (12) is connected to the end of the second placement cavity (121) near the first lifting rod (11). The side wall of the second placement cavity (121) away from the first placement cavity (111) is provided with a magnetic block (122). The fixing member (3) includes a limiting block (31) and a pull rope (32). The limiting block (31) is located in the first placement cavity (111). The limiting block (31) can slide laterally along the first placement groove. The limiting block (31) is smaller than or equal to the size of the first placement cavity (111). The pull rope (32) is connected to the end of the limiting block (31) away from the second placement cavity (121).

5. The deep-hole testing equipment for collapsible loess strata according to claim 4, characterized in that: The first lifting rod (11) is provided with a lifting ring (112), the peripheral sidewall of the lifting ring (112) is connected to the inner sidewall of the first sampling ring, and a lifting rope (113) is connected to the lifting ring (112).

6. The deep-hole testing equipment for collapsible loess strata according to claim 3, characterized in that: The opening at the end of the first sampling head (21) away from the first lifting rod (11) is smaller than the opening at the end of the first sampling head (21) close to the first lifting rod (11). The end of the first sampling head (21) close to the first lifting rod (11) is provided with multiple guide vanes (6), and one end of the guide vane (6) extends out of the peripheral sidewall of the first sampling head (21).

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