Underground diaphragm wall grooving slurry and mud cake sampling equipment and use method thereof

Abstract

The invention provides underground diaphragm wall grooving slurry and mud cake sampling equipment and a using method thereof.The underground diaphragm wall grooving slurry and mud cake sampling equipment comprises a shell, a plurality of hanging rings are arranged at the top of the shell, and a first sampling hole is formed in the side face of the shell; a plurality of slurry sampling mechanisms are arranged at the bottom end of the shell and sample slurry from the bottom of the shell; a mud cake sampling mechanism is arranged in the shell and samples mud cakes from the side face of the shell. A counterweight connecting groove is formed in the top of the shell, and a plurality of counterweight blocks are arranged in the counterweight connecting groove. The underground diaphragm wall grooving mud and mud cake sampling device can conveniently sample underground diaphragm wall grooving mud and mud cakes, the sampling operation is simple, and the sampling efficiency is higher; the mud cake and mud sampling device can sample mud cakes and mud at different positions and heights, the sampling process can be completed at a time, the sampling efficiency is higher, different sampling requirements can be met, and the adaptive capacity is better.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling mud and mud skin for trenching of ground-connected wall, and in particular to a sampling device for sampling mud and mud skin for trenching of ground-connected wall and a method of using the same. Background Art

[0002] Underground continuous wall, also known as ground-connected wall, is a key technology for deep foundation pit support and anti-seepage structure, and is widely used in high-rise buildings, subway tunnels and water conservancy projects.

[0003] The core construction steps of a ground-anchored wall include trenching, mud walling, reinforcement cage installation, and concrete pouring. The mud walling protects the trench walls through the hydrostatic pressure of the mud and the formation of a mud crust, preventing collapse. Mud properties (such as specific gravity, viscosity, and pH) and mud crust thickness directly influence trench wall stability.

[0004] Currently, mud and mud skin testing during ground-connected wall construction primarily relies on manual sampling: operators use manual samplers to extract mud samples at different depths, resulting in delayed detection and uncertainty about sample representativeness. Mud skin thickness is measured visually or with simple tools, which results in high error rates and lacks real-time data feedback. Furthermore, sampling devices are limited in functionality and lack integrated capabilities. To address these issues, the present invention proposes a device for sampling mud and mud skin in ground-connected wall trenches and a method for its use. Summary of the Invention

[0005] The main purpose of the present invention is to provide a ground-connected wall trough mud and mud skin sampling device and a use method thereof, so as to solve the problem of inconvenience in sampling mud and mud skin.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A device for sampling mud and mud skin in a ground-connected wall trench, comprising a housing, a top of which is provided with a plurality of hanging rings, and a side of which is provided with a first sampling hole; The bottom of the shell is provided with a number of mud sampling mechanisms, which sample mud from the bottom of the shell; A mud skin sampling mechanism is arranged in the shell, and the mud skin sampling mechanism samples the mud skin from the side of the shell.

[0007] In a preferred solution, a counterweight connecting groove is provided on the top of the shell, and a plurality of counterweight blocks are provided in the counterweight connecting groove.

[0008] In a preferred embodiment, the mud sampling mechanism includes a plurality of second sampling holes provided at the bottom of the housing; A plurality of connecting pipes are provided at the bottom of the inner wall of the housing, and the connecting pipes are connected to the second sampling holes; A valve is provided in the connecting pipe; It also includes a sampling barrel, one end of which is provided with a fixed tube and the other end of which is threadedly connected with a sampling cap; A one-way valve is provided in the fixed pipe; The fixed pipe is provided with a plug-in pipe, which is plugged into the interior of the connecting pipe; The inner wall of the connecting pipe is provided with an L-shaped mounting groove; The outer wall of the plug-in tube is provided with a mounting block, which is slidably connected to the inside of the mounting groove.

[0009] In a preferred embodiment, a push plate is provided on a side of the housing away from the first sampling hole, and a plurality of guide rods are provided on a side of the push plate close to the housing, and the guide rods pass through the housing; A fixing sleeve is provided on the inner side of the shell, and a transmission rod is provided on the side of the push plate close to the shell, and the transmission rod slides and extends into the interior of the fixing sleeve; The transmission rod is a square rod; The fixing sleeve is provided with a motor, the output shaft of the motor is provided with a threaded rod, the threaded rod is located inside the transmission rod, and the threaded rod is threadedly connected to the transmission rod.

[0010] In the preferred solution, a movable frame is provided in the housing, and the mud skin sampling mechanism is provided in the movable frame; The movable frame includes a slide rail provided at the bottom of the inner wall of the shell; The output end of the slide rail is provided with a sliding shell; A guide sleeve is provided on the inner wall of the outer shell, and one end of the sliding shell is slidably connected to the inside of the guide sleeve; The mud skin sampling mechanism is located inside the sliding shell; An operating hole is provided on the top of the sliding shell; An opening is provided on one side of the sliding shell close to the first sampling hole for the mud skin sampling mechanism to extend and take samples.

[0011] In the preferred solution, a fixing seat is provided in the sliding shell; Sampling cylinders are provided on both sides of the fixing seat, one end of the sampling cylinder is opened, the opening is a cone, and the opening is aligned with the first sampling hole; The inner wall of the shell is provided with a guide sleeve, which is communicated with the first sampling hole.

[0012] In a preferred embodiment, a hole is provided in the fixing seat; a lighting lamp is provided on one side of the fixing seat; a plurality of connecting blocks are provided on the inner wall of the sliding shell, and the connecting blocks are provided with fixing plates; there are two fixing plates, which are located at both ends of the hole provided in the fixing seat; and a gap is provided between the fixing plates and the fixing seat; The mud skin sampling mechanism also includes two rotating wheels arranged between the two fixed plates, and the two rotating wheels are connected by a conveyor belt transmission; The conveyor belt surface is provided with a number of positioning rings, which are rotatably connected to a movable shaft through a bearing. Both ends of the movable shaft pass through the gap between the fixed plate and the fixed seat, and a limit plate is provided at the end of the movable shaft; A fixing ring is provided at one end of the limit plate away from the movable shaft, a balancing block is provided on one side of the fixing ring, and the other side of the fixing ring is threadedly connected to the sampling tube; A stabilizing block is provided at the bottom of the limiting plate; and one of the rotating wheels is provided with a rotating shaft.

[0013] In a preferred embodiment, the other rotating wheel is provided with a one-way shaft; The one-way shaft includes a fixed shaft fixedly connected to the rotating wheel, and a one-way bearing is provided between the fixed shaft and the fixed plate; A damping shaft is provided at one end of the fixed shaft away from the rotating wheel; the damping shaft is connected to the fixed shaft for damping rotation; The damping shaft is provided with a gear; A guide plate is provided on the inner side of the guide sleeve, and guide grooves are provided on both sides of the sliding shell, and the guide plate passes through the guide grooves; A rack is provided at the bottom of the guide plate, and the rack is meshed with the gear; The rack is only long enough to allow the gear to turn 90°.

[0014] A method for using a device for sampling mud and mud skin in a trench of a ground-connected wall, comprising the following steps: S1. Use a crane to lift the sampling equipment into the ground-connected wall groove; S2, descending to the first detection depth to sample mud and mud skin; S3, descend to the next testing depth and take samples of mud and mud skin; S4, repeat S3 until all detection depth sampling is completed; S5. The crane lifts the sampling equipment back to its original position and extracts the sample.

[0015] In a preferred solution, the sampling equipment is provided with multiple groups of mud and mud skin sampling structures, and the groups of mud and mud skin sampling structures are marked, and different groups of mud and mud skin sampling structures sample mud and mud skin at different depths; The sampling device is equipped with a counterweight to enable the sampling device to move downward stably in the mud.

[0016] The present invention provides a device for sampling mud and mud skin in a trench of a ground-connected wall and a method for using the same. By adopting the above scheme, the following beneficial effects are achieved: 1. It is convenient to sample the mud and mud skin in the ground-connected wall groove. The sampling operation is simple and the sampling efficiency is higher.

[0017] 2. It can sample mud skin and mud at different positions and heights, and the sampling process can be completed at one time. Not only is the sampling efficiency higher, but it can also adapt to different sampling needs and has better adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of the internal top view structure of the present invention; Figure 4 It is a structural schematic diagram of the mud sampling mechanism of the present invention; Figure 5 It is a schematic cross-sectional view of the mud sampling mechanism of the present invention; Figure 6 It is a schematic diagram of the internal structure of the movable frame of the present invention; Figure 7 This is a front view of the internal structure of the movable frame of the present invention; Figure 8 It is a left side view of the movable frame of the present invention.

[0019] In the picture: Shell 1, lifting ring 101, first sampling hole 102, guide sleeve 103, counterweight block 2, counterweight connecting groove 201, mud sampling mechanism 3, sampling barrel 301, fixed pipe 302, connecting pipe 303, valve 304, second sampling hole 305, one-way valve 306, plug-in tube 307, mounting groove 308, mounting block 309, sampling cover 310, push plate 401, guide rod 402, fixed sleeve 403, motor 404, transmission rod 405, movable frame 5, slide rail 501, Sliding shell 502, operating hole 503, fixed seat 504, connecting block 505, fixed plate 506, lighting lamp 507, guide sleeve 6, mud skin sampling mechanism 7, conveyor belt 701, positioning ring 721, movable shaft 722, limit plate 723, fixed ring 703, balance block 731, sampling tube 704, stabilizing block 705, rotating wheel 706, rotating shaft 707, one-way shaft 708, fixed shaft 781, damping shaft 782, one-way bearing 783, rack 709, gear 710. DETAILED DESCRIPTION

[0020] In the embodiments of the present application, Figure 1 、 2 As shown in Figure 3, a ground-connected wall trough mud and mud skin sampling equipment includes a shell 1, and a plurality of lifting rings 101 are provided on the top of the shell 1. The lifting rings 101 are used for lifting and connecting the crane hook and the lifting rope; preferably, the top plate of the shell 1 is a detachable plate, which is connected by existing bolts or snaps when in use.

[0021] A plurality of mud sampling mechanisms 3 are provided at the bottom of the shell 1 , and the mud sampling mechanisms 3 sample mud from the bottom of the shell 1 ; a first sampling hole 102 is provided on the side of the shell 1 ; a mud skin sampling mechanism 7 is provided inside the shell 1 , and the mud skin sampling mechanism 7 samples mud skin from the side of the shell 1 .

[0022] When in use, the shell 1 is lifted into the ground-connected wall groove that needs to be inspected by the existing crane equipment, and then gradually lowered. During the lowering process, mud and mud skin sampling are carried out through the mud sampling mechanism 3 and the mud skin sampling mechanism 7. The operation is simple and the efficiency is higher.

[0023] In a further embodiment, a counterweight connection slot 201 is provided on the top of the housing 1, and a plurality of counterweight blocks 2 are provided in the counterweight connection slot 201. Thus, when the overall weight of the device of the present application is insufficient and cannot be lowered into the mud, counterweight blocks 2 can be added to increase the overall weight.

[0024] In a further preferred embodiment, Figure 4 and 5 As shown, the mud sampling mechanism 3 includes a plurality of second sampling holes 305 provided at the bottom of the outer shell 1; a plurality of connecting pipes 303 are provided at the bottom of the inner wall of the outer shell 1, and the connecting pipes 303 are connected to the second sampling holes 305; a valve 304 is provided in the connecting pipe 303; the valve 304 is preferably a solenoid valve; or the valve 304 can be replaced by a mud pump, depending on actual needs.

[0025] It also includes a sampling barrel 301, one end of which is provided with a fixed tube 302, and the other end is threadedly connected to a sampling cover 310; the sampling cover 310 is preferably provided with an air hole connected to the interior of the sampling barrel 301 to ensure that mud can enter smoothly without being affected by air pressure.

[0026] A one-way valve 306 is provided in the fixed pipe 302 so that mud can only enter the sampling barrel 301 through the one-way valve 306 and cannot flow out through the one-way valve 306 ; the fixed pipe 302 is provided with a plug-in tube 307 which is plugged into the interior of the connecting pipe 303 .

[0027] The inner wall of the connecting tube 303 is provided with an L-shaped mounting groove 308; the outer wall of the plug-in tube 307 is provided with a mounting block 309, which is slidably connected to the interior of the mounting groove 308. During the plug-in process, the mounting block 309 is first aligned with the mounting groove 308, then the sampling barrel 301 is lowered to allow the plug-in tube 307 to enter the connecting tube 303, and the mounting block 309 slides into the mounting groove 308. After sliding into the bottom of the mounting groove 308, the sampling barrel 301 is rotated to move the mounting block 309 to the inside of the mounting groove 308, completing the connection. Otherwise, the mounting block 309 can be disassembled. The operation is simple and convenient.

[0028] During use, the equipment moves into the mud, and after reaching the sampling height, one of the valves 304 or the mud pump is started. After the valve 304 is opened, it is affected by the hydraulic pressure and, through the communicating vessel principle (the mud pump is affected by negative pressure), the mud enters the sampling barrel 301 through the connecting pipe 303, the plug-in pipe 307 and the fixed pipe 302. After the sampling is completed, the valve 304 or the mud pump can be closed, and then the equipment is continued to move downward to sample at another sampling position through another mud sampling mechanism 3, so that mud at different heights can be sampled.

[0029] In a further embodiment, Figure 2 and 3 As shown, a push plate 401 is provided on the side of the housing 1 away from the first sampling hole 102. Several guide rods 402 are provided on the side of the push plate 401 closer to the housing 1. The guide rods 402 extend through the housing 1 and guide the sliding of the push plate 401. A fixed sleeve 403 is provided on the inner side of the housing 1. A transmission rod 405 is provided on the side of the push plate 401 closer to the housing 1. The transmission rod 405 slides and extends into the interior of the fixed sleeve 403. The transmission rod 405 is a square rod to prevent rotation. The fixed sleeve 403 is equipped with a motor 404, which is preferably a conventional servo motor or stepper motor, controlled and connected using conventional methods. The output shaft of the motor 404 is provided with a threaded rod, which is located inside the transmission rod 405 and is threadedly connected to the transmission rod 405. During use, the starting motor 404 drives the threaded rod to rotate, thereby driving the transmission rod 405 to slide, which can drive the push plate 401 to slide. The push plate 401 rests against the side wall of the ground-connected wall groove, so that the side of the shell 1 with the first sampling hole 102 is close to the other side wall, which makes it convenient for the mud skin sampling mechanism 7 to sample the wall skin at the first sampling hole 102.

[0030] In a further preferred embodiment, Figure 2 、 3 , 6, 7 and 8, a movable frame 5 is provided in the housing 1, and a mud skin sampling mechanism 7 is provided in the movable frame 5; Specifically, the movable frame 5 includes a slide rail 501 provided at the bottom of the inner wall of the outer shell 1, and the slide rail 501 is preferably an existing electric slide rail; the output end of the slide rail 501 is provided with a sliding shell 502; the inner wall of the outer shell 1 is provided with a guide sleeve 6, and one end of the sliding shell 502 is slidably connected to the inside of the guide sleeve 6; the mud skin sampling mechanism 7 is located inside the sliding shell 502; the sliding shell 502 is provided with an opening on the side close to the first sampling hole 102 for extending the mud skin sampling mechanism 7 for sampling. When mud skin sampling is required, the sliding shell 502 is driven to slide by the slide rail 501, and the mud skin sampling mechanism 7 is driven to approach and pass through the first sampling hole 102, and then it can be extended into the mud skin for mud skin sampling, and vice versa, it can be retracted, which is simple to operate and convenient for mud skin sampling. An operating hole 503 is provided on the top of the sliding shell 502 for taking out the sampled mud skin.

[0031] In a further embodiment, a fixed seat 504 is provided within the sliding shell 502; sampling tubes 704 are provided on both sides of the fixed seat 504, one end of which is opened with a conical opening, and the opening is aligned with the first sampling hole 102; a guide sleeve 103 is provided on the inner wall of the housing 1, and the guide sleeve 103 is connected to the first sampling hole 102. When the sliding shell 502 slides, it drives the sampling tube 704 to slide, and the sampling tube 704 slides out of the first sampling hole 102 and can be inserted into the mud skin. The mud skin enters the sampling tube 704, and sampling is completed. Then, the mud skin slides away from the sampling tube 704, and the sampling tube 704 can drive the sampled mud skin back into the housing 1. When sampling, preferably, the sliding shell 502 and the slide rail 501 are both tilted so that the sampling end of the sampling tube 704 opens upward, so that the movement trajectory of the sampling tube 704 during sampling is tilted upward, thereby ensuring that the mud skin enters the sampling tube 704 and ensuring stable sampling.

[0032] In the preferred embodiment, a hole is provided in the fixing seat 504; a lighting lamp 507 is provided on one side of the fixing seat 504; a plurality of connecting blocks 505 are provided on the inner wall of the sliding shell 502, and the connecting blocks 505 are provided with fixing plates 506; there are two fixing plates 506, which are located at both ends of the hole provided in the fixing seat 504; a gap is formed between the fixing plates 506 and the fixing seat 504; the shape of the gap is as follows: Figure 7 As shown, it is a shape similar to a playground track, which is the movement trajectory of the sampling tube 704.

[0033] Preferably, a plurality of sampling tubes 704 are provided, and the mud skin sampling mechanism 7 also includes two rotating wheels 706 arranged between the two fixed plates 506, and the two rotating wheels 706 are connected by a conveyor belt 701. The rotating wheels 706 can choose whether to use a roller motor according to actual use requirements; a plurality of positioning rings 721 are provided on the surface of the conveyor belt 701, and the positioning rings 721 are rotatably connected to a movable shaft 722 through bearings, and both ends of the movable shaft 722 pass through the gap between the fixed plate 506 and the fixed seat 504, and a limit plate 723 is provided at the end of the movable shaft 722; so that the movable shaft 722 can rotate while following the movement of the conveyor belt 701.

[0034] A fixing ring 703 is provided at one end of the limiting plate 723 away from the movable shaft 722, a balancing block 731 is provided on one side of the fixing ring 703, and the other side of the fixing ring 703 is threadedly connected to the sampling tube 704; a stabilizing block 705 is provided at the bottom of the limiting plate 723; when in use, the stabilizing block 705 is a counterweight lead block, and when in use, the stabilizing block 705 is always located below the movable shaft 722 due to the influence of gravity, so that when the movable shaft 722 moves following the belt 701, the sampling tube 704 can always maintain its angle to ensure stable sampling.

[0035] One of the rotating wheels 706 is provided with a rotating shaft 707; the rotating shaft 707 can be connected to the motor output shaft, can be connected to a manual handle, or can be connected to no external structure, depending on actual needs.

[0036] In a further embodiment, another rotating wheel 706 is provided with a one-way shaft 708. Specifically, the one-way shaft 708 includes a fixed shaft 781 fixedly connected to the rotating wheel 706, and a one-way bearing 783 is provided between the fixed shaft 781 and the fixed plate 506, so that the fixed shaft 781, the rotating wheel 706, and the conveyor belt 701 can only rotate in one direction. A damping shaft 782 is provided at the end of the fixed shaft 781 away from the rotating wheel 706. The damping shaft 782 is connected to the fixed shaft 781 for damping rotation. The damping shaft 782 adopts an existing damping structure. When in use, the damping shaft 782 can rotate with the fixed shaft 781. At the same time, when the fixed shaft 781 is stuck, the force of the damping shaft 782's rotation operates the damping force, and the damping shaft 782 can rotate normally relative to the fixed shaft 781. Specifically, the existing structure can be used.

[0037] A gear 710 is mounted on the damping shaft 782. A guide plate is mounted on the inner side of the guide sleeve 6, and a guide groove is formed on both sides of the sliding housing 502, through which the guide plate passes. A rack 709 is mounted on the bottom of the guide plate. Rack 709 remains stationary, following the guide sleeve 6, and meshes with gear 710. The length of rack 709 only allows gear 710 to rotate 90°. This application uses 90° as an example. The specific rotation angle depends on actual usage requirements and the distance between adjacent sampling tubes 704.

[0038] During use, when the sliding shell 502 moves toward the first sampling hole 102, the gear 710 is affected by the rack 709 to rotate normally, and drives the damping shaft 782 to rotate. At this time, the fixed shaft 781 is affected by the one-way bearing 783 and cannot rotate. The damping shaft 782 rotates relative to the fixed shaft 781 until the sampling tube 704 is inserted into the mud skin to complete the sampling. After the sampling is completed, the sliding shell 502 is reset. During the sampling process, the gear 710 moves along the rack 709 and drives it to rotate 90°, so that the fixed shaft 781 can be driven to rotate 90° through the damping shaft 782, thereby driving the rotating wheel 706 and the conveyor belt 701 to rotate, and finally the sampling tube 704 that has been sampled is turned away, and the unsampled one is turned to the position aligned with the first sampling hole 102, so that multiple samplings can be performed to meet different sampling needs.

[0039] When the sliding housing 502 moves to the rightmost position, the gear 710 and the rack 709 are in a non-engaged state.

[0040] In a further embodiment, a method for using a device for sampling mud and mud skin in a trenching process for a ground-connected wall comprises the following steps: S1. Use a crane to lift the sampling equipment into the ground-connected wall groove; The sampling equipment is provided with multiple groups of mud and mud skin sampling structures, which are marked. Different groups of mud and mud skin sampling structures sample mud and mud skin at different depths. The sampling device is equipped with a counterweight to enable the sampling device to move steadily downward in the mud; S2, descending to the first detection depth to sample mud and mud skin; S3, descend to the next testing depth and take samples of mud and mud skin; S4, repeat S3 until all detection depth sampling is completed; S5. The crane lifts the sampling equipment back to its original position and extracts the sample.

[0041] Through the above method, it is convenient for users to sample mud and mud skin at different heights and positions in the ground-connected wall groove, which is simple to operate and more efficient.

[0042] In this application, the power supply and control equipment all adopt the existing control equipment and power supply used in the ground-connected wall construction site. The power supply can be provided by a diesel generator or a construction site power supply. The control equipment is preferably a controller with a control panel. The ground-connected wall trough mud and mud skin sampling equipment of this application is connected to the power supply and control equipment through power lines and signal lines. The power lines and signal lines are reserved with sufficient length. The position of the mud skin and mud sampling is set by the control equipment, or manually controlled by the switch, such as sampling operations are performed when descending 2, 2.5 and 3 meters, and the descent height is controlled by a crane.

[0043] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A device for sampling mud and mud skin in a trench of a ground-connected wall, characterized by: It comprises a housing (1), a top of the housing (1) is provided with a plurality of hanging rings (101), and a side of the housing (1) is provided with a first sampling hole (102); A plurality of mud sampling mechanisms (3) are provided at the bottom of the housing (1), and the mud sampling mechanisms (3) sample mud from the bottom of the housing (1); A mud skin sampling mechanism (7) is provided in the housing (1), and the mud skin sampling mechanism (7) samples mud skin from the side of the housing (1).

2. The slurry and mud skin sampling equipment for trenching of ground-connected wall according to claim 1, characterized in that: A counterweight connection groove (201) is provided on the top of the housing (1), and a plurality of counterweight blocks (2) are provided in the counterweight connection groove (201).

3. The slurry and mud skin sampling equipment for trenching of ground-connected wall according to claim 1, characterized in that: The mud sampling mechanism (3) comprises a plurality of second sampling holes (305) provided at the bottom of the housing (1); A plurality of connecting pipes (303) are provided at the bottom of the inner wall of the housing (1), and the connecting pipes (303) are in communication with the second sampling hole (305); A valve (304) is provided in the connecting pipe (303); It also includes a sampling barrel (301), one end of the sampling barrel (301) is provided with a fixed tube (302), and the other end is threadedly connected to a sampling cover (310); A one-way valve (306) is provided in the fixed pipe (302); The fixed tube (302) is provided with a plug-in tube (307), and the plug-in tube (307) is plugged into the interior of the connecting tube (303); The inner wall of the connecting pipe (303) is provided with a mounting groove (308), and the mounting groove (308) is L-shaped; The outer wall of the plug-in tube (307) is provided with a mounting block (309), and the mounting block (309) is slidably connected to the inside of the mounting groove (308).

4. The slurry and mud skin sampling equipment for trenching of ground-connected wall according to claim 1, characterized in that: A push plate (401) is provided on a side of the housing (1) away from the first sampling hole (102), and a plurality of guide rods (402) are provided on a side of the push plate (401) close to the housing (1), and the guide rods (402) pass through the housing (1); A fixing sleeve (403) is provided on the inner side of the housing (1), and a transmission rod (405) is provided on the side of the push plate (401) close to the housing (1), and the transmission rod (405) slides and extends into the interior of the fixing sleeve (403); The transmission rod (405) is a square rod; The fixing sleeve (403) is provided with a motor (404), and the output shaft of the motor (404) is provided with a threaded rod, the threaded rod is located inside the transmission rod (405), and the threaded rod is threadedly connected to the transmission rod (405).

5. The slurry and mud skin sampling equipment for trenching of ground-connected wall according to claim 1, characterized in that: A movable frame (5) is provided in the housing (1), and a mud skin sampling mechanism (7) is provided in the movable frame (5); The movable frame (5) includes a slide rail (501) provided at the bottom of the inner wall of the housing (1); The output end of the slide rail (501) is provided with a slide housing (502); A guide sleeve (6) is provided on the inner wall of the outer shell (1), and one end of the sliding shell (502) is slidably connected to the inside of the guide sleeve (6); The mud skin sampling mechanism (7) is located inside the sliding shell (502); An operating hole (503) is provided on the top of the sliding shell (502); An opening is provided on one side of the sliding shell (502) close to the first sampling hole (102) for the mud skin sampling mechanism (7) to extend and sample.

6. The device for sampling mud and mud skin for trenching of ground-connected wall according to claim 5, characterized in that: A fixing seat (504) is provided in the sliding shell (502); Sampling cylinders (704) are provided on both sides of the fixing seat (504), one end of the sampling cylinder (704) is opened, the opening is a cone, and the opening is aligned with the first sampling hole (102); A guide sleeve (103) is provided on the inner wall of the housing (1), and the guide sleeve (103) is communicated with the first sampling hole (102).

7. The slurry and mud skin sampling equipment for trenching of ground-connected wall according to claim 6, characterized in that: A hole is provided in the fixing seat (504); a lighting lamp (507) is provided on one side of the fixing seat (504); a plurality of connecting blocks (505) are provided on the inner wall of the sliding shell (502), and the connecting blocks (505) are provided with fixing plates (506); there are two fixing plates (506), which are located at both ends of the hole provided in the fixing seat (504); and a gap is provided between the fixing plates (506) and the fixing seat (504); The mud skin sampling mechanism (7) further comprises two rotating wheels (706) disposed between the two fixed plates (506), and the two rotating wheels (706) are connected by a transmission belt (701); The surface of the conveyor belt (701) is provided with a plurality of positioning rings (721), and the positioning rings (721) are rotatably connected to a movable shaft (722) through a bearing. Both ends of the movable shaft (722) pass through the gap between the fixed plate (506) and the fixed seat (504), and a limit plate (723) is provided at the end of the movable shaft (722); A fixing ring (703) is provided at one end of the limiting plate (723) away from the movable shaft (722), a balancing block (731) is provided on one side of the fixing ring (703), and the other side of the fixing ring (703) is threadedly connected to the sampling tube (704); A stabilizing block (705) is provided at the bottom of the limiting plate (723); and one of the rotating wheels (706) is provided with a rotating shaft (707).

8. The device for sampling mud and mud skin for trenching of ground-connected wall according to claim 7, characterized in that: Another rotating wheel (706) is provided with a one-way shaft (708); The one-way shaft (708) includes a fixed shaft (781) fixedly connected to the rotating wheel (706), and a one-way bearing (783) is provided between the fixed shaft (781) and the fixed plate (506); A damping shaft (782) is provided at one end of the fixed shaft (781) away from the rotating wheel (706); the damping shaft (782) is connected to the fixed shaft (781) for damping rotation; The damping shaft (782) is provided with a gear (710); A guide plate is provided on the inner side of the guide sleeve (6), and guide grooves are provided on both sides of the sliding shell (502), and the guide plate passes through the guide grooves; A rack (709) is provided at the bottom of the guide plate, and the rack (709) is engaged with a gear (710); The length of the rack (709) only allows the gear (710) to rotate 90°.

9. A method for using the ground-connected wall trenching mud and mud skin sampling device according to any one of claims 1 to 8, characterized in that: The steps include: S1. Use a crane to lift the sampling equipment into the ground-connected wall groove; S2, descending to the first detection depth to sample mud and mud skin; S3, descend to the next testing depth and take samples of mud and mud skin; S4, repeat S3 until all detection depth sampling is completed; S5. The crane lifts the sampling equipment back to its original position and extracts the sample.

10. The method for using the ground-connected wall trenching mud and mud skin sampling device according to claim 9, characterized in that: The sampling equipment is provided with multiple groups of mud and mud skin sampling structures, which are marked. Different groups of mud and mud skin sampling structures sample mud and mud skin at different depths. The sampling device is equipped with a counterweight to enable the sampling device to move downward stably in the mud.

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