Reducing joint of ultra-deep diaphragm wall joint pipe joint and construction method

Abstract

The invention discloses a variable-diameter joint of an ultra-deep diaphragm wall joint pipe joint and a construction method. The variable-diameter joint comprises a large-diameter bottom pipe, and one end of the large-diameter bottom pipe is matched with a large-diameter insertion rod arranged at one end of a large-diameter joint pipe in an inserted mode through a large-diameter insertion groove; the other end of the large-diameter joint pipe is also connected with a large-diameter slot, the large-diameter slot is matched with the adjacent large-diameter joint pipe in an inserting manner, and a plurality of large-diameter joint pipes form a large-diameter pipe section; the end of the large-diameter pipe section is connected with the large-small-diameter connector, the other end of the large-small-diameter connector is connected with the small-diameter pipe section, and the small-diameter pipe section is formed by connecting a plurality of small-diameter connector pipes. The method solves the problem that in the prior art, the pipe drawing difficulty of the diaphragm wall connector pipe is large, and has the advantages that negative pressure is prevented from being generated at the bottom of the pipe drawing bench in the mode that grouting is actively conducted from the hole opening to the hole bottom, and therefore the pipe drawing difficulty is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-seepage walls, and in particular relates to a reducer joint of an ultra-deep anti-seepage wall joint pipe joint and a construction method. Background Art

[0002] With the development of water conservancy and hydropower, the development of water conservancy and hydropower projects has gradually expanded to the western plateau and canyon basins. The conditions for dam construction are becoming more and more complex, with high mountains and deep valleys, thick covering layers, and complex geological conditions. Generally, an anti-seepage wall is used as the vertical anti-seepage system of the dam. The anti-seepage wall is an underground continuous wall constructed by using mud to protect the wall into a groove, and then pouring concrete or backfilling other anti-seepage materials under the mud. Its function is to achieve an anti-seepage effect. Usually, the anti-seepage wall needs to be divided into multiple different unit slots and unit wall sections, and each unit wall section is connected to form an integral anti-seepage wall through joints or joints. At the joint, the pipe pulling method is often used for operation, that is, before pouring concrete in the first phase of the trough section, joint pipes are placed on both sides of the trough section. After the concrete is initially set, the joint pipes are pulled out by a pipe pulling machine or a crane, thereby forming smooth semi-cylindrical surfaces on both sides of the first phase of the trough section, which is convenient for the construction of the second phase of the trough section and forms a joint surface here; for ultra-deep anti-seepage walls, if the entire joint pipe is made of large diameter, the overall cost and weight will increase. At the same time, as the concrete pouring proceeds, the joint pipe is squeezed toward the side wall, the contact area with the original soil increases, and the friction force also increases accordingly, which brings greater difficulty to the pipe pulling and easily causes pipe casting accidents. Therefore, it is necessary to design a reducer joint and construction method for the joint pipe joint of an ultra-deep anti-seepage wall to solve the above problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a reducer joint for an ultra-deep anti-seepage wall joint pipe joint and a construction method. The method solves the problem of difficulty in pulling out the anti-seepage wall joint pipe in the prior art, and has the characteristics of being able to actively inject grout from the hole mouth to the hole bottom to avoid negative pressure at the bottom of the pipe pulling machine, thereby reducing the difficulty of pulling out the pipe.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A reducer joint for an ultra-deep anti-seepage wall joint pipe joint comprises a large-diameter bottom pipe, one end of the large-diameter bottom pipe is plugged and matched with a large-diameter plug rod arranged at one end of a large-diameter joint pipe through a large-diameter slot; the other end of the large-diameter joint pipe is also connected with a large-diameter slot, plugged and matched with an adjacent large-diameter joint pipe, and multiple sections of large-diameter joint pipes form a large-diameter pipe section; the end of the large-diameter pipe section is connected with a large-diameter connector, the other end of the large-diameter connector is connected with a small-diameter pipe section, and the small-diameter pipe section is formed by connecting multiple sections of small-diameter joint pipes.

[0005] Preferably, the small-diameter joint tube is a hollow floating tube with multiple hollow buoyancy boxes arranged inside; one end of the small-diameter joint tube is connected to a small-diameter slot, and the other end is connected to a small-diameter insertion rod that is plugged into the small-diameter slot of the adjacent small-diameter joint tube.

[0006] Preferably, the large-diameter joint pipe comprises a hollow floating pipe section and a hollow through-pipe section; a plurality of hollow buoyancy boxes are arranged inside the floating pipe section.

[0007] Furthermore, the buoyancy box is a closed hollow space, which can provide buoyancy for the floating pipe and reduce the self-weight of the overall process of the joint pipe; and the through pipe section can increase the deadweight of the joint pipe when it is lowered.

[0008] Preferably, the large-diameter bottom pipe is a hollow through pipe, and a bottom valve is hinged at the other end of the large-diameter bottom pipe.

[0009] Preferably, the large and small diameter connectors are hollow funnel-shaped tubular structures, with the large diameter end connected to a large diameter plug rod that is plugged into a large diameter slot at the end of the large diameter pipe section, and the small diameter end connected to a small diameter slot that is plugged into a small diameter plug rod at the end of the small diameter pipe section.

[0010] Preferably, the outer surfaces of the small-diameter joint pipe, the large-diameter joint pipe, the large-diameter bottom pipe and the large-diameter and small-diameter connectors are all provided with a plurality of placement holes.

[0011] Preferably, the small-diameter joint pipe, the large-diameter joint pipe and the large-diameter and small-diameter connectors are all connected with seamless steel pipes, and the seamless steel pipes include grouting pipes, and the surfaces of the grouting pipes are connected with a plurality of inclination sensors.

[0012] Preferably, through pin holes are provided on both sides of the small-diameter slot and the large-diameter slot, and through pin holes are provided on the surfaces of the small-diameter insertion rod and the large-diameter insertion rod. After the slot and the insertion rod are connected, they are fixed by the pin shaft passing through the pin hole.

[0013] Preferably, the pin shaft includes a rotating shaft, which passes through the pin hole and rotates with the inner wall of the pin hole; through holes are opened at both ends of the rotating shaft, and steel pin rods are inserted in the through holes, and both ends of the steel pin rod are threadedly connected to limit plates.

[0014] Preferably, a construction method of a reducer joint of an ultra-deep anti-seepage wall joint pipe joint comprises the following steps: S1, a hydraulic pipe pulling machine is placed at the hole mouth, and the hydraulic pipe pulling machine includes a jacking platform, a hydraulic jacking device and a temporary shelving base; a steel wire rope is suspended by a car crane and connected to the large-diameter slot of the large-diameter bottom pipe through a lifting tool. After the large-diameter bottom pipe is vertically erected, it is lowered to the hole mouth by the hydraulic pipe pulling machine. After it reaches the predetermined position, a shelving shoulder pole is used to shelve the large-diameter joint pipe section on the hydraulic pipe pulling machine. Similarly, the next large-diameter joint pipe is lifted, and the large-diameter insertion rod of this joint pipe is connected to the large-diameter insertion rod of the upper bottom pipe. The grooves are butted, and the grouting pipe and the inclination sensor inside the pipe section are connected at the same time, and fixed with a pin shaft; the two large-diameter joint pipes that have been butted are lifted, the laying shoulder pole is removed, and the large-diameter joint pipe section composed of the two large-diameter joint pipes is lowered. After reaching the predetermined position, the laying shoulder pole is used to lay the next large-diameter joint pipe on the hydraulic pipe pulling machine, and the subsequent large-diameter joint pipe is lifted, and the above steps are repeated for installation until all large-diameter joint pipes are lowered into the hole; the laying shoulder pole is plugged into the laying hole; S2, use a car crane to hang a steel wire rope to connect it with the small-diameter slot of the large-diameter connector through the lifting tool, lift it to the large-diameter joint pipe at the hole mouth, connect the large-diameter plug rod of the large-diameter connector with the large-diameter slot of the large-diameter joint pipe, connect the grouting pipe and the inclination sensor at the same time, and fix them with a pin shaft; lift the large-diameter connector and the large-diameter joint pipe that have been connected, remove the laying shoulder pole, lower the connected pipe section, and after it reaches the predetermined position, use the laying shoulder pole to place the next section of the small-diameter joint pipe on the hydraulic pipe pulling machine; S3, use a car crane to hang a steel wire rope to connect it to the small-diameter slot of the small-diameter joint pipe through the lifting tooling, and after the small-diameter joint pipe is vertical, connect the small-diameter plug rod of the small-diameter joint pipe with the small-diameter slot of the large-diameter connector, and connect the grouting pipe and the inclination sensor at the same time, and fix them with a pin shaft; lift the pipe section that has been connected, remove the laying shoulder pole, lower the pipe section that has been connected, and after it reaches the predetermined position, use the laying shoulder pole to place the next section of the small-diameter joint pipe on the hydraulic pipe pulling machine, and lift the subsequent small-diameter joint pipes until all small-diameter joint pipes are lowered into the hole; S4, when the concrete is poured to the predetermined height, use the hydraulic pipe pulling machine to pull out the joint pipe section: First, use a laying pole to place the joint pipe section on the jacking platform of the hydraulic pipe pulling machine, and inject grout from the ground through the grouting pipe in the joint pipe section to ensure that there is no negative pressure at the bottom of the pipe. At the same time, start the hydraulic jacking device, lift the joint pipe by 1 to 2 meters, insert a temporary shelving plate at the temporary shelving base, temporarily fix the joint pipe section, then pull out the laying pole, lower the jacking platform to the predetermined position, insert the laying pole into the second shelving hole of the joint pipe, pull out the temporary shelving plate, start the hydraulic jacking device to lift the joint pipe by 1 to 2 meters again, and repeat the above process until each section of the joint pipe is ejected. After pulling out the pin shaft connected to the joint pipe, each section of the ejected joint pipe is lifted to the remaining area by a car crane.

[0015] Furthermore, the lifting tool is composed of two steel wire ropes and an I-shaped steel frame; wherein, the steel wire rope is suspended by a car crane and connected to the slot end of the joint pipe through the I-shaped steel frame of the lifting tool.

[0016] Furthermore, the shoulder pole body is made of a high-strength steel structure, which matches the reserved placement hole of the joint pipe and is used to place the joint pipe on the pipe pulling machine.

[0017] Furthermore, the temporary shelving plate is made of high-strength steel and matches the shelving hole reserved in the joint pipe, so as to temporarily shelve the joint pipe on the temporary shelving base of the pipe pulling machine.

[0018] The beneficial effects of the reducer joint of the ultra-deep anti-seepage wall joint pipe joint and the construction method provided by the present invention are as follows: The several rest holes on each section of the joint pipe can be used as temporary rest holes when the joint pipe is laid down, and can also be used as pulling holes when pulling out, and can also effectively reduce the dead weight of the joint pipe; the large-diameter joint pipe is mainly used for the casting of ultra-deep anti-seepage walls, and the small-diameter joint pipe is used as a pulling pipe. It is connected by a reducer, which reduces the diameter of the upper joint pipe, effectively reduces the weight and friction during the pulling process, reduces the risk of casting pipes, and saves construction costs; the difficulty of pulling pipes can be reduced by actively grouting from the hole mouth to the bottom of the hole to avoid negative pressure at the bottom of the pipe pulling machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the overall structure of the reducer type joint pipe device of the present invention; Figure 2 It is a structural schematic diagram of the small-diameter joint pipe device of the present invention; Figure 3 It is a structural schematic diagram of a large-diameter joint pipe device of the present invention; Figure 4 It is a structural schematic diagram of the large-diameter joint pipe bottom pipe device of the present invention; Figure 5 It is a structural schematic diagram of a large-caliber connecting joint device of the present invention; Figure 6 It is a schematic cross-sectional structure diagram of a reducer type joint pipe device of the present invention; Figure 7 It is a schematic diagram of the lifting operation of the reducer joint pipe of the present invention; Figure 8 It is a schematic diagram of the pull-out work of the reducer joint pipe of the present invention; Fig. 9 It is a schematic diagram of the pin structure of the present invention; Fig.10It is a schematic end view of a large-diameter bottom pipe of the present invention; Fig.11 It is a structural schematic diagram of a shelving shoulder pole and a temporary shelving board of the present invention; In the figure: small-diameter joint pipe 1, small-diameter slot 11, small-diameter plug rod 12, shelving hole 13, buoyancy box 14, large-diameter joint pipe 2, large-diameter plug rod 22, large-diameter bottom pipe 3, large-diameter slot 31, bottom valve 32, large-diameter and small-diameter connector 4, hydraulic pipe pulling machine 5, jacking platform 51, hydraulic jacking device 52, temporary shelving base 53, seamless steel pipe 6, grouting pipe 61, inclination sensor 62, lifting tool 7, steel wire rope 71, I-shaped steel frame 72, shelving pole 8, pin 9, rotating shaft 91, steel pin rod 92, limit plate 93, temporary shelving plate 10. DETAILED DESCRIPTION

[0020] Embodiment 1: like Figure 1 to Figure 11 A reducer joint of an ultra-deep anti-seepage wall joint pipe joint comprises a large-diameter bottom pipe 3, one end of the large-diameter bottom pipe 3 is plugged and matched with a large-diameter plug rod 22 arranged at one end of a large-diameter joint pipe 2 through a large-diameter slot 31; the other end of the large-diameter joint pipe 2 is also connected with a large-diameter slot 31, plugged and matched with an adjacent large-diameter joint pipe 2, and multiple sections of large-diameter joint pipes 2 form a large-diameter pipe section; the end of the large-diameter pipe section is connected with a large-diameter connector 4, the other end of the large-diameter connector 4 is connected to a small-diameter pipe section, and the small-diameter pipe section is formed by connecting multiple sections of small-diameter joint pipes 1.

[0021] Preferably, the small-diameter joint pipe 1 is a hollow floating tube with multiple hollow buoyancy boxes 14 arranged inside; one end of the small-diameter joint pipe 1 is connected to a small-diameter slot 11, and the other end is connected to a small-diameter insertion rod 12 that is plugged into the small-diameter slot 11 of the adjacent small-diameter joint pipe 1.

[0022] Preferably, the large-diameter joint pipe 2 includes a hollow floating pipe section and a hollow through-pipe section; a plurality of hollow buoyancy boxes 14 are arranged inside the floating pipe section.

[0023] Furthermore, the buoyancy box 14 is a closed hollow space, which can provide buoyancy for the floating pipe and reduce the self-weight of the overall process of the joint pipe; and the through pipe section can increase the self-weight of the joint pipe when it is lowered.

[0024] Preferably, the large-diameter bottom pipe 3 is a hollow through pipe, and a bottom valve 32 is hinged at the other end of the large-diameter bottom pipe 3 .

[0025] Preferably, the large-diameter and small-diameter connectors 4 are hollow funnel-shaped tubular structures, with the large-diameter end being connected to a large-diameter plug rod 22 that is plugged into a large-diameter slot 31 at the end of the large-diameter pipe section, and the small-diameter end being connected to a small-diameter slot 11 that is plugged into a small-diameter plug rod 12 at the end of the small-diameter pipe section.

[0026] Preferably, a plurality of placement holes 13 are provided on the outer surfaces of the small-diameter joint pipe 1 , the large-diameter joint pipe 2 , the large-diameter bottom pipe 3 , and the large-diameter and small-diameter connectors 4 .

[0027] Preferably, the small-diameter joint pipe 1 , the large-diameter joint pipe 2 and the large-diameter and small-diameter connectors 4 are all connected with seamless steel pipes 6 , and the seamless steel pipes 6 include grouting pipes 61 , and a plurality of inclination sensors 62 are connected to the surface of the grouting pipes 61 .

[0028] Preferably, through pin holes are provided on both sides of the small-diameter slot 11 and the large-diameter slot 31, and through pin holes are provided on the surfaces of the small-diameter insertion rod 12 and the large-diameter insertion rod 22. After the slots and the insertion rods are connected, they are fixed by passing the pin shaft 9 through the pin holes.

[0029] Preferably, the pin shaft 9 includes a rotating shaft 91, which passes through the pin hole and rotates with the inner wall of the pin hole; through holes are opened at both ends of the rotating shaft 91, and a steel pin rod 92 is inserted into the through hole, and both ends of the steel pin rod 92 are threadedly connected to a limit plate 93.

[0030] Embodiment 2: Preferably, a construction method of a reducer joint of an ultra-deep anti-seepage wall joint pipe joint comprises the following steps: S1, a hydraulic pipe pulling machine 5 is placed at the orifice, and the hydraulic pipe pulling machine 5 includes a jacking platform 51, a hydraulic jacking device 52 and a temporary placement base 53; a steel wire rope 71 is suspended by a car crane and connected to the large-diameter slot 31 of the large-diameter bottom pipe 3 through a lifting tool 7, and the large-diameter bottom pipe 3 is vertically erected, and then lowered to the orifice by the hydraulic pipe pulling machine 5. After reaching the predetermined position, a placement shoulder pole 8 is used to place the large-diameter joint pipe 2 on the hydraulic pipe pulling machine 5, and similarly, the next large-diameter joint pipe 2 is lifted, and the large-diameter insertion rod 22 of this joint pipe is connected to the large-diameter bottom pipe of the previous section. The two large-diameter joint pipes 2 are connected to the slot 31, and the grouting pipe 61 and the inclination sensor 62 inside the pipe section are connected at the same time, and fixed with the pin shaft 9; the two large-diameter joint pipes 2 that have been connected are lifted, the laying shoulder pole 8 is removed, and the large-diameter joint pipe 2 composed of the two large-diameter joint pipes 2 is lowered to the predetermined position, and the next large-diameter joint pipe 2 is laid on the hydraulic pipe pulling machine 5 by the laying shoulder pole 8, and the subsequent large-diameter joint pipe 2 is lifted, and the above steps are repeated for installation until all the large-diameter joint pipes 2 are lowered into the hole; the laying shoulder pole 8 is plugged into the laying hole 13; S2, use a car crane to hang a steel wire rope 71 and connect it to the small-diameter slot 11 of the large-diameter connector 4 through the lifting tool 7, lift it to the large-diameter joint pipe 2 at the orifice, dock the large-diameter plug rod 22 of the large-diameter connector 4 with the large-diameter slot 31 of the large-diameter joint pipe 2, connect the grouting pipe 61 and the inclination sensor 62 at the same time, and fix them with the pin 9; lift the docked large-diameter connector 4 and the large-diameter joint pipe 2, remove the placing shoulder pole 8, lower the connected pipe section, and after it reaches the predetermined position, use the placing shoulder pole 8 to place the next section of the small-diameter joint pipe 1 on the hydraulic pipe pulling machine 5; S3, use a car crane to hang a steel wire rope 71 and connect it to the small-diameter slot 11 of the small-diameter joint pipe 1 through the lifting tool 7, and after the small-diameter joint pipe 1 is vertical, the small-diameter plug rod 12 of the small-diameter joint pipe 1 is connected to the small-diameter slot 11 of the large-diameter connector 4, and the grouting pipe 61 and the inclination sensor 62 are connected at the same time, and fixed with the pin 9; lift the pipe section that has been connected, remove the shelf shoulder pole 8, and lower the pipe section that has been connected to the predetermined position, and use the shelf shoulder pole 8 to place the next section of the small-diameter joint pipe 1 on the hydraulic pipe pulling machine 5, and lift the subsequent small-diameter joint pipes 1 until all the small-diameter joint pipes 1 are lowered into the hole; S4, when the concrete is poured to 50m, use the hydraulic pipe pulling machine 5 to pull out the joint pipe section: First, the joint pipe section is placed on the jacking platform 51 of the hydraulic pipe pulling machine 5 by using a placing shoulder pole 8, and grouting is performed from the ground through the grouting pipe 61 in the joint pipe section to ensure that there is no negative pressure at the bottom of the pipe. At the same time, the hydraulic jacking device 52 is started, and the joint pipe is lifted by 1 to 2 meters. Then, a temporary shelving plate 10 is inserted into the temporary shelving base 53 to temporarily fix the joint pipe section. Then, the placing shoulder pole 8 is pulled out, and after the jacking platform 51 is lowered to a predetermined position, the placing shoulder pole 8 is inserted into the second shelving hole 13 of the joint pipe, and the temporary shelving plate 10 is pulled out. The hydraulic jacking device 52 is started to lift the joint pipe by 1 to 2 meters again, and the above process is repeated until each joint pipe section is ejected. After the pin shaft 9 connected to the joint pipe is pulled out, each ejected joint pipe section is lifted to the remaining area by a car crane.

[0031] Furthermore, the lifting fixture 7 is composed of two steel wire ropes 71 and an I-shaped steel frame 72; wherein, the steel wire rope 71 is suspended by a car crane and connected to the slot end of the joint pipe through the I-shaped steel frame 72 of the lifting fixture 7.

[0032] Furthermore, the main body of the placing shoulder pole 8 is made of a high-strength steel structure, which matches the placing hole 13 reserved in the joint pipe, so as to place the joint pipe on the pipe pulling machine.

[0033] Furthermore, the temporary placement plate 10 is made of high-strength steel and matches the placement hole 13 reserved for the joint pipe, so as to temporarily place the joint pipe on the temporary placement base 53 of the pipe pulling machine.

Claims

1. A reducer joint for an ultra-deep anti-seepage wall joint pipe joint, characterized in that: The invention comprises a large-diameter bottom tube (3), one end of which is plugged into a large-diameter plug rod (22) provided at one end of a large-diameter joint tube (2) through a large-diameter slot (31); the other end of the large-diameter joint tube (2) is also connected to the large-diameter slot (31) and plugged into an adjacent large-diameter joint tube (2); a plurality of sections of large-diameter joint tubes (2) form a large-diameter pipe section; the end of the large-diameter pipe section is connected to a large-diameter connector (4); the other end of the large-diameter connector (4) is connected to a small-diameter pipe section; the small-diameter pipe section is formed by connecting a plurality of sections of small-diameter joint tubes (1).

2. The reducer joint of the ultra-deep anti-seepage wall joint pipe joint according to claim 1, characterized in that: The small-diameter joint pipe (1) is a hollow floating pipe, and a plurality of hollow floating boxes (14) are arranged inside. One end of the small-diameter joint pipe (1) is connected to a small-diameter slot (11), and the other end is connected to a small-diameter plug rod (12) for plugging and matching with the small-diameter slot (11) of an adjacent small-diameter joint pipe (1).

3. The reducer joint of the ultra-deep anti-seepage wall joint pipe joint according to claim 1, characterized in that: The large-diameter joint pipe (2) comprises a hollow floating pipe section and a hollow through-pipe section; a plurality of hollow buoyancy boxes (14) are arranged inside the floating pipe section.

4. The reducer joint of the ultra-deep anti-seepage wall joint pipe joint according to claim 1, characterized in that: The large-diameter bottom pipe (3) is a hollow through pipe; a bottom valve (32) is hingedly connected to the other end of the large-diameter bottom pipe (3).

5. The reducer joint of the ultra-deep anti-seepage wall joint pipe joint according to claim 1, characterized in that: The large-diameter and small-diameter connectors (4) are hollow funnel-shaped tubular structures, with the large-diameter end being connected to a large-diameter plug rod (22) for plugging and fitting with a large-diameter slot (31) at the end of the large-diameter pipe section, and the small-diameter end being connected to a small-diameter slot (11) for plugging and fitting with a small-diameter plug rod (12) at the end of the small-diameter pipe section.

6. The reducer joint of the ultra-deep anti-seepage wall joint pipe joint according to claim 1, characterized in that: The outer surfaces of the small-diameter joint pipe (1), the large-diameter joint pipe (2), the large-diameter bottom pipe (3) and the large-diameter and small-diameter connectors (4) are all provided with a plurality of placement holes (13).

7. The reducer joint of the ultra-deep anti-seepage wall joint pipe joint according to claim 1, characterized in that: The small-diameter joint pipe (1), the large-diameter joint pipe (2) and the large-diameter and small-diameter connectors (4) are all internally connected with seamless steel pipes (6), the seamless steel pipes (6) comprising grouting pipes (61), and the surfaces of the grouting pipes (61) are connected with a plurality of inclination sensors (62).

8. The reducer joint of the ultra-deep anti-seepage wall joint pipe joint according to claim 1, characterized in that: Through pin holes are provided on both sides of the small-diameter slot (11) and the large-diameter slot (31), and through pin holes are provided on the surfaces of the small-diameter plug rod (12) and the large-diameter plug rod (22). After the slot and the plug rod are plugged in, they are fixed by passing a pin shaft (9) through the pin holes.

9. The reducer joint of the ultra-deep anti-seepage wall joint pipe joint according to claim 8, characterized in that: The pin shaft comprises a rotating shaft (91), which passes through the pin hole and rotates with the inner wall of the pin hole; through holes are formed at both ends of the rotating shaft (91), and steel pin rods (92) are inserted into the through holes. Both ends of the steel pin rod (92) are threadedly connected to limit plates (93).

10. The construction method of a reducer joint of an ultra-deep anti-seepage wall joint pipe joint according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, a hydraulic pipe pulling machine (5) is placed at the hole mouth, and the hydraulic pipe pulling machine (5) includes a lifting platform (51), a hydraulic lifting device (52) and a temporary placement base (53); a steel wire rope is suspended by a car crane and connected to the large-diameter slot (31) of the large-diameter bottom pipe through a lifting tool (7), and the large-diameter bottom pipe (3) is vertically placed, and then lowered to the hole mouth by the hydraulic pipe pulling machine (5). After reaching a predetermined position, a placement pole (8) is used to place the large-diameter joint pipe section on the hydraulic pipe pulling machine (5), and similarly, the next large-diameter joint pipe (2) is lifted, and the large-diameter insertion rod (22) of the current joint pipe is connected to the large-diameter slot of the previous bottom pipe. (31) butt joint, and simultaneously connect the grouting pipe (61) and the inclination sensor (62) inside the pipe section, and fix them with a pin shaft (9); lift the two large-diameter joint pipes (2) that have been butt jointed, remove the placing shoulder pole (8), lower the large-diameter joint pipe section composed of the two large-diameter joint pipes (2), and after it reaches a predetermined position, use the placing shoulder pole (8) to place the next large-diameter joint pipe (2) on the hydraulic pipe pulling machine (5), lift the subsequent large-diameter joint pipe (2), and repeat the above steps for installation until all the large-diameter joint pipes (2) are lowered into the hole; the placing shoulder pole (8) is plugged into the placing hole (13); S2, using a car crane to hang a steel wire rope through a lifting tool (7) to connect the small-diameter slot (11) of the large-diameter connector, lifting it to the large-diameter joint pipe (2) at the hole mouth, docking the large-diameter plug rod (22) of the large-diameter connector (4) with the large-diameter slot (31) of the large-diameter joint pipe (2), and connecting the grouting pipe (61) and the inclination sensor (62) at the same time, and fixing them with a pin shaft (9); lifting the docked large-diameter connector (4) and the large-diameter joint pipe (2), removing the placing shoulder pole (8), lowering the connected pipe section to a predetermined position, and using the placing shoulder pole (8) to place the next section of the small-diameter joint pipe (1) on the hydraulic pipe pulling machine (5); S3, using a car crane to hang a steel wire rope to connect it to the small-diameter slot (11) of the small-diameter joint pipe through the lifting tool (7), and after the small-diameter joint pipe (1) is vertically erected, the small-diameter plug rod (12) of the small-diameter joint pipe is connected to the small-diameter slot (11) of the large-diameter and small-diameter connector (4), and the grouting pipe (61) and the inclination sensor (62) are connected at the same time, and fixed with a pin shaft (9); lifting the pipe section that has been connected, removing the laying shoulder pole (8), lowering the pipe section that has been connected to a predetermined position, and using the laying shoulder pole (8) to place the next section of the small-diameter joint pipe (1) on the hydraulic pipe pulling machine (5), and lifting the subsequent small-diameter joint pipes (1) until all the small-diameter joint pipes (1) are lowered into the hole; S4, when the concrete is poured to a predetermined height, the joint pipe section is pulled out using a hydraulic pipe pulling machine (5): First, a placing shoulder pole (8) is used to place the joint pipe section on the lifting platform (51) of the hydraulic pipe pulling machine (5), and grouting is performed from the ground through the grouting pipe (61) in the joint pipe section to ensure that there is no negative pressure at the bottom of the pipe. At the same time, the hydraulic lifting device (52) is started to lift the joint pipe by 1 to 2 meters, and then a temporary shelving plate (10) is inserted into the temporary shelving base (53) to temporarily fix the joint pipe section. Then, the placing shoulder pole (8) is pulled out, and the lifting platform (51) is lowered to a predetermined position. Then, the placing shoulder pole (8) is inserted into the second shelving hole (13) of the joint pipe, and the temporary shelving plate (10) is pulled out. The hydraulic lifting device (52) is started to lift the joint pipe by 1 to 2 meters again. The above process is repeated until each joint pipe section is ejected. After the pin shaft (9) connected to the joint pipe is pulled out, each ejected joint pipe section is lifted to other areas by a truck crane.

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