Installation tools and methods for hoisting frames, water-stop steel sleeves at the entrance and exit of jacking pipes

Abstract

This invention discloses a hoisting frame, a fixture for installing a water-stop steel sleeve at the entrance and exit of a jacking pipe, and an installation method thereof. The fixture includes a ground anchor, a winch, a wire rope, a pre-embedded pipe, and a hoisting frame. The hoisting frame includes a universal joint, a support frame, a transverse sliding rail with an elongated hole, a fastening nut, and a telescopic arm assembly. The support frame is connected between the universal joint and the transverse sliding rail. The telescopic arm assembly is connected to the transverse sliding rail. The fastening nut is connected to an internal and external threaded joint. The pre-embedded pipe is embedded in the pit wall. The ground anchor is connected to the ground surface at the top of the pit. The winch and hoisting frame are connected to the ground anchor. One end of the wire rope is connected to the winch, and the other end passes through the hoisting frame and the pre-embedded pipe to connect to the water-stop steel sleeve. The fixture disclosed in this invention is convenient to install and adjust, and the installation method is simple to operate, has high installation accuracy and efficiency, and the installation process is more labor-saving and safer.

Description

Technical Field

[0001] This invention relates to the field of trenchless pipe jacking construction technology, specifically to a hoisting frame, a tooling for installing a water-stop steel sleeve at the pipe jacking inlet and outlet, including the hoisting frame, and an installation method thereof. Background Technology

[0002] Water-stop steel sleeves are important water-stopping devices at the construction openings during pipe jacking construction.

[0003] There are two existing methods for installing water-stop steel sleeves at the entrance and exit of the pipe jacking project: one is to erect a support frame below the installation location of the steel sleeve and fix it in sections to the upper support structure (wall); the other is to drill cores into the already poured support structure (wall). The existing methods have the following drawbacks: 1. Due to the large weight of the water-stop steel sleeve at the entrance, the support frame is prone to deformation, resulting in a high risk factor and difficulty in installing and fixing the water-stop steel sleeve, leading to low construction accuracy; 2. It requires additional temporary facilities such as scaffolding and concrete core drilling, resulting in low installation efficiency, long construction period, and high costs. Summary of the Invention

[0004] The present invention aims to provide an easily adjustable lifting frame;

[0005] Another objective of this invention is to provide an installation tool for a water-stop steel sleeve at the entrance and exit of a jacking pipe, which is labor-saving, safe, easy to operate, and has high installation accuracy and efficiency.

[0006] The present invention also aims to provide an installation method based on the above-mentioned installation fixture for the water-stop steel sleeve at the entrance and exit of the jacking pipe, so as to solve the installation problem of the water-stop steel sleeve at the entrance and exit of the jacking pipe.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a lifting frame, including a universal joint, a support frame, a transverse slide rail with an elongated hole, a fastening nut, and a telescopic arm assembly. The telescopic arm assembly includes a pulley, a connecting lug, a wire rope limiting component, an inner sleeve, an outer sleeve, and a hand-tightening screw. One end of the outer sleeve has an inner sleeve insertion interface, and the outer wall of the other end has a groove. The end face of the groove has an internal and external threaded joint. One end of the inner sleeve is inserted into the outer sleeve, and the other end is connected to one end of the connecting lug. The pulley and the wire rope limiting component are both connected to the connecting lug. The hand-tightening screw is connected to the internal and external threaded joint, and one end of the hand-tightening screw is rotatably connected to the end of the inner sleeve.

[0009] The support frame is connected between the universal joint and the transverse slide rail;

[0010] The telescopic arm assembly is connected to the transverse slide rail via the slide groove, and the internal and external threaded joint passes through the elongated hole on the transverse slide rail;

[0011] The fastening nut is connected to the external thread of the internal and external threaded joint.

[0012] Preferably, the support frame is provided with a base, the base has a hole, and the base is connected to the lower part of the support frame. The base includes a plate, a pipe or other support that can increase the contact surface between the lower part of the support frame and the bottom surface.

[0013] Preferably, the number of telescopic arm assemblies is two.

[0014] The present invention also provides an installation fixture for a water-stop steel sleeve at the entrance and exit of a jacking pipe, comprising a ground anchor, a winch, a wire rope, a pre-embedded pipe, and the aforementioned hoisting frame, wherein the pre-embedded pipe is embedded in the foundation pit wall; the ground anchor is located away from the foundation pit wall and connected to the ground surface at the top of the well; the winch is connected to the ground anchor; the hoisting frame is connected to the ground anchor via the universal joint; one end of the wire rope is connected to the winch, and the other end passes through the hoisting frame and the pre-embedded pipe to connect the water-stop steel sleeve.

[0015] Preferably, a tensioner is connected to the wire rope.

[0016] Preferably, the tooling further includes a positioning pin, which is inserted into a hole on the base.

[0017] Preferably, the embedded pipe is a steel pipe.

[0018] This invention also provides a method for installing a water-stop steel sleeve using the aforementioned installation tool for the water-stop steel sleeve at the entrance and exit of the jacking pipe, which includes the following steps:

[0019] 1) Tooling layout,

[0020] A. During the construction of the foundation pit retaining wall, two pre-embedded pipes are buried inside the foundation pit retaining wall;

[0021] B. Measure and find the midpoint of the line connecting the centers of the upper ends of the two pre-embedded pipes;

[0022] C. Determine the fixed position of the ground anchor on the top of the well, such that the distance between the part of the ground anchor used to connect with the universal joint and the midpoint of the line connecting the center of the pipe opening is equal to the midpoint of the adjustable length range of the hoisting frame;

[0023] D. After the ground anchor is fixed to the ground at the top of the well, connect the ground anchor to the winch and the hoisting frame respectively, so that the midpoint of the line connecting the center of the hole on the base and the center of the pipe opening coincides with the line connecting the universal joint. Then connect one end of the wire rope to the winch and the other end of the wire rope through the pulley and the pre-embedded pipe.

[0024] E. Adjust the length and left and right position of the telescopic arm assembly so that the part of the wire rope after passing through the pulley falls vertically into the pre-embedded pipe;

[0025] 2) Lifting of the water-stop steel sleeve: The water-stop steel sleeve is pre-set with rope holes or lifting lugs for connecting the lifting rope and the wire rope. During the lifting, the water-stop steel sleeve is lifted into the foundation pit by a crane and placed close to the foundation pit wall where the pre-embedded pipe is buried, so that the water-stop steel sleeve is directly below the installation position. Then, the wire rope passing through the pre-embedded pipe is connected to the lifting lug on the water-stop steel sleeve. The winch is slowly started so that the wire rope bears the weight of the water-stop steel sleeve. At the same time, the crane lifting rope is released to lower the hook until the water-stop steel sleeve is completely lifted by the wire rope.

[0026] 3) Position the water-stop steel sleeve at the required elevation. Start the winch to lift the steel wire rope and raise the water-stop steel sleeve. When the water-stop steel sleeve is lifted to near the installation position, adjust the tensioner to precisely adjust the elevation of the water-stop steel sleeve and ensure that the water-stop steel sleeve is at the required height.

[0027] 4) Horizontal positioning of the water-stop steel sleeve: Measure the deviation between the centerline of the two pre-embedded pipes and the center of the water-stop steel sleeve. Based on the deviation, adjust the tensioners on the two steel wire ropes respectively so that the center of the water-stop steel sleeve coincides with the midpoint of the line connecting the centerlines of the two pre-embedded pipes, and position the water-stop steel sleeve in the pre-installation position.

[0028] 5) Concrete pouring for the foundation pit wall: Fix the positioned water-stop steel sleeve to the foundation pit wall reinforcement mesh, then splice the wall formwork, and set a concrete pouring funnel on the formwork to ensure that the space around the water-stop steel sleeve is filled with concrete and vibrated to compact it. After the concrete around the water-stop steel sleeve has set, remove the wall formwork and remove the concrete from the concrete pouring funnel.

[0029] 6) Tooling removal: Cut the wire rope near the upper end of the pre-embedded pipe, then remove the universal joint and winch from the ground anchor, and remove the tooling for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe.

[0030] Preferably, after step D is completed, a positioning pin is driven into the hole on the base.

[0031] Preferably, the number of concrete pouring funnel openings in step 5) is 2.

[0032] Preferably, the distance between the two concrete pouring funnel openings is 50cm to 200cm.

[0033] Preferably, after step 5), the exposed parts of the water-stop steel sleeve are coated with anti-rust paint.

[0034] Due to the adoption of the above technical solutions, the advantages of this invention are as follows:

[0035] 1. The hoisting frame provided by the present invention can be connected to the ground anchor through the universal joint at one end (using conventional methods such as bolts). After that, the midpoint of the line connecting the center of the hole on the base and the center of the pipe opening is aligned with the line connecting the universal joint, the hoisting frame can be positioned. In addition, positioning nails can be driven into the hole to enhance the stability of the hoisting frame. The connection and positioning are simple.

[0036] 2. The hoisting frame provided by the present invention can adjust the lateral position of the telescopic arm assembly by loosening and tightening the fastening nut, and adjust the extension length of the telescopic arm assembly by tightening the hand screw. The operation and adjustment are simple and convenient.

[0037] 3. The installation tool for the water-stop steel sleeve at the entrance and exit of the jacking pipe provided by this invention is used in the installation process. After the water-stop steel sleeve to be installed is lowered into the foundation pit, the elevation and horizontal positioning of the water-stop steel sleeve do not require the participation of a crane, the erection of a support below the installation position of the steel sleeve, the drilling of the already poured foundation pit wall, or the laborious movement and adjustment of the water-stop steel sleeve position by personnel. This invention can mainly be achieved by the operator adjusting the winch to quickly raise the water-stop steel sleeve to the vicinity of the installation position, and then using a tensioner to complete the fine adjustment of the elevation and horizontal position of the water-stop steel sleeve. It is labor-saving, safe, simple to operate, and has high installation accuracy and efficiency.

[0038] 4. In the installation of the water-stop steel sleeve, the present invention adopts a method of slowly starting the winch so that the steel wire rope on it bears the weight of the water-stop steel sleeve until the water-stop steel sleeve is completely lifted by the steel wire rope, and then the crane hook and the crane are removed, making the transition process stable and safe. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and therefore should not be regarded as a limitation on the scope. Moreover, the same reference numerals are used to denote the same parts throughout the drawings.

[0040] In the attached diagram:

[0041] Figure 1 A side view schematic diagram of the transition state of the water-stop steel sleeve provided in the installation embodiment of the present invention, from being hoisted by the hoisting rope of a crane to being hoisted by the wire rope connected to a winch;

[0042] Figure 2A front view of the water-stop steel sleeve provided in the installation embodiment of the present invention after it has been hoisted to the installation position by a steel wire rope connected to a winch;

[0043] Figure 3 In order to be in Figure 2 A side view of the steel sleeve with the protective wall template installed on the outer end;

[0044] Figure 4 for Figure 3 A front view schematic diagram showing the positional relationship between the wall protection formwork, the water-stop steel sleeve, and the foundation pit wall;

[0045] Figure 5 A three-dimensional schematic diagram of the hoisting frame provided for an installation embodiment of the present invention;

[0046] Figure 6 This is a cross-sectional view of the telescopic arm assembly and the fastening nut provided in the installation embodiment of the present invention.

[0047] In the diagram: 1. Ground anchor; 2. Winch; 3. Wire rope; 4. Tensioner; 5. Lifting frame; 51. Universal joint; 52. Base; 53. Support frame; 54. Horizontal slide rail; 541. Long hole; 55. Telescopic boom assembly; 551. Pulley; 552. Shaft; 553. Connecting lug; 554. Inner sleeve; 555. Outer sleeve; 556. Slide groove; 557. Internal and external threaded joint; 558. Fastening nut; 559. Hand-tightening screw; 6. Lifting rope; 7. Embedded pipe; 8. Water-stop steel sleeve; 81. Lifting lug; 9. Hole; 10. Pit wall protection; 20. Wall protection formwork; 21. Concrete pouring funnel opening; 30. Well top surface; 40. Pit bottom; 50. Positioning nail; 60. Wire rope limiter. Detailed Implementation

[0048] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] Example of telescopic boom assembly (55):

[0050] See Figure 5 , Figure 6The telescopic boom assembly (55) provided in this embodiment of the invention consists of two components. Each telescopic boom assembly (55) includes a pulley (551), a connecting lug (553), a wire rope limiting component (60), an inner sleeve (554), an outer sleeve (555), and a hand-tightening screw (559). One end of the outer sleeve (555) is provided with an inner sleeve insertion interface, and the outer wall of the other end is provided with a groove (556). The end face of the end where the groove (556) is located is provided with internal and external threads. The connector (557) is inserted into the outer sleeve (555) at one end and connected to the connecting lug (553) at the other end. The pulley (551) and the wire rope limiting member (60) are both connected to the connecting lug (553). The hand screw (559) is threaded into the internal and external threaded connector (557) and one end of the hand screw (559) is rotatably connected to the end of the inner sleeve (554).

[0051] Example of hoisting frame (5):

[0052] See Figure 1 , Figure 5 , Figure 6 The hoisting frame (5) provided in this embodiment of the invention includes a universal joint (51), a support frame (53), a transverse slide rail (54) with an elongated hole (541), a fastening nut (558), and a telescopic arm assembly (55). The lower part of the support frame (53) is connected to a base (52), the base (52) has a hole (9), and the support frame (53) is connected between the universal joint (51) and the transverse slide rail (54).

[0053] The telescopic arm assembly (55) is connected to the transverse slide rail (54) via the slide groove (556), and the internal and external threaded joint (557) passes through the elongated hole (541) on the transverse slide rail (54).

[0054] The fastening nut (558) is connected to the external thread of the internal and external threaded joint (557).

[0055] Example of installation tooling for water-stop steel sleeves at the inlet and outlet of the jacking pipe:

[0056] See Figure 1 , Figure 5The installation fixture for the water-stop steel sleeve at the entrance and exit of the jacking pipe provided in this embodiment of the invention includes a ground anchor (1), a winch (2), a wire rope (3), a tensioner (4) connected to the wire rope (3), a pre-embedded pipe (7), a hoisting frame (5), and a positioning nail (50). The pre-embedded pipe (7) is embedded in the foundation pit wall (10); the ground anchor (1) is away from the foundation pit wall (10) and connected to the ground surface (30) at the top of the well; the winch (2) is connected to the ground anchor (1); the hoisting frame (5) is connected to the ground anchor (1) through the universal joint (51); the positioning nail (50) is inserted into the hole (9) on the lower base (52) of the hoisting frame (5); one end of the wire rope (3) is connected to the winch (2), and the other end passes through the hoisting frame (5) and the pre-embedded pipe (7) and is used to connect the water-stop steel sleeve (8).

[0057] Example of installation method for water-stop steel sleeve at the inlet and outlet of the jacking pipe:

[0058] The embodiment of the method for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe provided by the present invention is based on the aforementioned embodiment of the installation tooling for the water-stop steel sleeve at the entrance and exit of the jacking pipe. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, it includes the following steps:

[0059] 1) Tooling layout,

[0060] A. During the construction of the foundation pit retaining wall (10), two pre-embedded pipes (7) are buried in the foundation pit retaining wall (10);

[0061] B. Use a ruler or other tools to measure and find the midpoint of the line connecting the centers of the upper ends of the two pre-embedded pipes (7), and mark it;

[0062] C. Determine the fixed position of the ground anchor (1) on the ground surface (30) at the top of the well, such that the distance between the part of the ground anchor (1) used to connect with the universal joint (51) and the midpoint of the line connecting the center of the pipe opening is equal to the median length of the adjustable length range of the hoisting frame (5). For example, if the adjustable length range of the hoisting frame (5) is 3m to 5m, then its median length is 4m.

[0063] D. After the ground anchor (1) is fixed to the ground surface (30) at the top of the well, the ground anchor (1) is connected to the winch (2) and the hoisting frame (5) respectively, so that the midpoint of the line connecting the center of the hole (9) on the base (52) and the center of the pipe opening coincides with the line connecting the universal joint (51). Then, one end of the wire rope (3) is connected to the winch (2), and the other end of the wire rope (3) passes through the wire rope limiting piece (60) and the pre-embedded pipe (7).

[0064] E. Insert positioning pins (50) into the holes (9) on the base (52) to further prevent the lifting frame (5) from shifting;

[0065] F. Adjust the length and left and right position of the telescopic arm assembly (55) so that the part of the wire rope (3) after passing through the pulley (551) falls vertically into the pre-embedded pipe (7);

[0066] 2) Lifting of the water-stop steel sleeve (8): The water-stop steel sleeve (8) is lifted into the foundation pit by a crane and placed close to the foundation pit wall (10) where the pre-embedded pipe (7) is buried, so that the water-stop steel sleeve (8) is located about 50cm directly below the installation position. Then, the steel wire rope (3) passing through the pre-embedded pipe (7) is connected to the lifting lug (81) on the water-stop steel sleeve (8). The winch (2) is slowly started so that the steel wire rope (3) bears the weight of the water-stop steel sleeve (8). At the same time, the crane lifting rope (6) is released to lower the hook until the water-stop steel sleeve (8) is completely lifted by the steel wire rope (3).

[0067] 3) Position the water-stop steel sleeve (8) at the elevation, turn on the winch (2) to act on the wire rope (3) to lift the water-stop steel sleeve (8), and when the water-stop steel sleeve (8) is lifted to about 5cm directly below the positioning height, adjust the tensioner (4) and use the level to accurately adjust the elevation of the water-stop steel sleeve (8) to ensure that the water-stop steel sleeve (8) is at the required height;

[0068] 4) Horizontal positioning of the water-stop steel sleeve (8): Use a total station to measure the deviation between the centerline of the two pre-embedded pipes (7) and the center of the water-stop steel sleeve (8). According to the deviation, adjust the tensioners (4) on the two steel wire ropes (3) respectively so that the center of the water-stop steel sleeve (8) coincides with the midpoint of the line connecting the centerlines of the two pre-embedded pipes (7), and position the water-stop steel sleeve (8) in the pre-installation position.

[0069] 5) Concrete pouring for the foundation pit retaining wall (10): Fix the positioned water-stop steel sleeve (8) to the steel mesh of the foundation pit retaining wall (10), then splice the retaining wall template (20), and set two concrete pouring funnel openings (21) at 150cm intervals on the retaining wall template (20) to ensure that the space around the water-stop steel sleeve (8) is filled with concrete and vibrated to compact it. After the concrete around the water-stop steel sleeve (8) has set, remove the retaining wall template (20) and remove the concrete from the concrete pouring funnel openings (21).

[0070] 6) Apply anti-rust paint. After removing the concrete from the concrete pouring funnel opening (21), apply anti-rust paint to the exposed parts of the installed water-stop steel sleeve (8).

[0071] 7) Tooling removal: Cut the wire rope (3) from the position near the upper end of the pre-embedded pipe (7), and then remove the universal joint (51) and winch (2) from the ground anchor (1) to remove the tooling for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe.

[0072] Methods for adjusting the length and position of the telescopic boom assembly (55):

[0073] See Figure 1 By adjusting the length and position of the telescopic arm assembly (55) disclosed in this invention, the portion of the wire rope (3) used for hoisting the water-stop steel sleeve (8) after passing through the pulley (551) can be vertically lowered into the pre-embedded pipe (7). This ensures that during the installation and adjustment of the water-stop steel sleeve (8), friction between the wire rope (3) and the pre-embedded pipe (7) is reduced, preventing damage to the tooling and related construction objects, and ensuring a safe and smooth installation process. See also Figure 5 , Figure 6 The adjustment method is as follows:

[0074] The telescopic arm assembly (55) can be adjusted by turning the hand screw (559) on the internal and external threaded joint (557) with one hand. As the hand screw (559) gradually enters the outer sleeve (555), the inner sleeve (554) is gradually pushed out of the outer sleeve (555) by the hand screw (559), thereby extending the telescopic arm assembly (55). When the length of the telescopic arm assembly (55) needs to be shortened, the hand screw (559) can be turned in the opposite direction.

[0075] To adjust the left and right position of the telescopic boom assembly (55), first loosen the fastening nut (558) on the internal and external threaded joint (557) to release the limitation of the telescopic boom assembly (55) on the transverse slide rail (54). Then, push and pull the outer sleeve (555) by hand to adjust the left and right position of the telescopic boom assembly (55) on the transverse slide rail (54). After the position of the telescopic boom assembly (55) is determined, the fastening nut (558) on the internal and external threaded joint (557) can be tightened again in the opposite direction to loosening, thereby repositioning the telescopic boom assembly (55).

[0076] The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A method for installing water-stop steel sleeves at the inlet and outlet of a jacking pipe, characterized in that: Based on the installation tooling for the water-stop steel sleeve at the entrance and exit of the pipe jacking tunnel. The installation equipment for the water-stop steel sleeve at the entrance and exit of the jacking pipe includes a ground anchor (1), a winch (2), a wire rope (3), a pre-embedded pipe (7), and a hoisting frame (5). The hoisting frame (5) includes a universal joint (51), a support frame (53), a transverse slide rail (54) with an elongated hole (541), a fastening nut (558), and a telescopic arm assembly (55). The telescopic arm assembly (55) includes a pulley (551), a connecting lug (553), a wire rope limiting component (60), an inner sleeve (554), an outer sleeve (555), and a hand-tightening screw (559). One end of the outer sleeve (555) has an inner sleeve insertion interface, and the outer wall of the other end has a sliding groove (556). The end face of the slide (556) is provided with an internal and external threaded joint (557); one end of the inner sleeve (554) is inserted into the outer sleeve (555), and the other end is connected to one end of the connecting ear (553); the pulley (551) and the wire rope limiting member (60) are both connected to the connecting ear (553); the hand-tightening screw (559) is threaded into the internal and external threaded joint (557), and one end of the hand-tightening screw (559) is rotatably connected to the end of the inner sleeve (554); The support frame (53) is connected between the universal joint (51) and the transverse slide rail (54); The lower part of the support frame (53) is connected to a base (52), and the base (52) is provided with a hole (9); The telescopic arm assembly (55) is connected to the transverse slide rail (54) via the slide groove (556), and the internal and external threaded joint (557) passes through the elongated hole (541) on the transverse slide rail (54). The fastening nut (558) is connected to the external thread of the internal and external threaded joint (557); The pre-embedded pipe (7) is embedded in the foundation pit retaining wall (10); the ground anchor (1) is away from the foundation pit retaining wall (10) and connected to the ground surface (30) at the top of the well; the winch (2) is connected to the ground anchor (1); the hoisting frame (5) is connected to the ground anchor (1) through the universal joint (51); one end of the wire rope (3) is connected to the winch (2), and the other end passes through the hoisting frame (5) and the pre-embedded pipe (7) and is used to connect the water-stop steel sleeve (8). Includes the following steps: 1) Tooling layout, A. During the construction of the foundation pit retaining wall (10), two pre-embedded pipes (7) are buried in the foundation pit retaining wall (10); B. Measure and find the midpoint of the line connecting the center of the upper end of the two pre-embedded pipes (7); C. Determine the fixed position of the ground anchor (1) on the top ground (30) of the well, such that the distance between the part of the ground anchor (1) used to connect with the universal joint (51) and the midpoint of the line connecting the center of the pipe opening is equal to the midpoint of the adjustable length range of the hoisting frame (5); D. After the ground anchor (1) is fixed to the ground surface (30) at the top of the well, the ground anchor (1) is connected to the winch (2) and the hoisting frame (5) respectively, so that the midpoint of the line connecting the center of the hole (9) on the base (52) and the center of the pipe opening coincides with the line connecting the universal joint (51). Then, one end of the wire rope (3) is connected to the winch (2), and the other end of the wire rope (3) passes through the wire rope limiting piece (60) and the pre-embedded pipe (7). E. Adjust the length and left and right position of the telescopic arm assembly (55) so that the part of the wire rope (3) after passing through the pulley (551) falls vertically into the pre-embedded pipe (7); 2) Lifting of the water-stop steel sleeve (8): The water-stop steel sleeve (8) is lifted into the foundation pit by a crane and placed close to the foundation pit wall (10) where the pre-embedded pipe (7) is buried, so that the water-stop steel sleeve (8) is located directly below the installation position. Then, the steel wire rope (3) passing through the pre-embedded pipe (7) is connected to the lifting lug (81) on the water-stop steel sleeve (8). The winch (2) is slowly started so that the steel wire rope (3) bears the weight of the water-stop steel sleeve (8). At the same time, the crane lifting rope (6) is released to lower the hook until the water-stop steel sleeve (8) is completely lifted by the steel wire rope (3). 3) Position the water-stop steel sleeve (8) at the elevation, turn on the winch (2) to act on the wire rope (3) to lift the water-stop steel sleeve (8), and when the water-stop steel sleeve (8) is lifted to near the installation position, adjust the tensioner (4) to accurately adjust the elevation of the water-stop steel sleeve (8) to ensure that the water-stop steel sleeve (8) is at the required height. 4) Horizontally position the water-stop steel sleeve (8), measure the deviation between the center axis of the two pre-embedded pipes (7) and the center of the water-stop steel sleeve (8), and adjust the tensioners (4) on the two steel wire ropes (3) according to the deviation so that the center of the water-stop steel sleeve (8) coincides with the midpoint of the line connecting the center axis of the two pre-embedded pipes (7), and position the water-stop steel sleeve (8) in the pre-installation position; 5) Concrete pouring for the foundation pit retaining wall (10): Fix the positioned water-stop steel sleeve (8) to the steel mesh of the foundation pit retaining wall (10), then splice the retaining wall formwork (20), and set the concrete pouring funnel opening (21) on the retaining wall formwork (20) to ensure that the space around the water-stop steel sleeve (8) is filled with concrete and vibrated to compact it. After the concrete around the water-stop steel sleeve (8) has set, remove the retaining wall formwork (20) and remove the concrete from the concrete pouring funnel opening (21). 6) Remove the tooling, cut the wire rope (3) from the position near the upper end of the pre-embedded pipe (7), then remove the universal joint (51) and winch (2) from the ground anchor (1), and remove the tooling for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe.

2. The method for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe as described in claim 1, characterized in that: The number of telescopic arm assemblies (55) is 2.

3. The method for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe as described in claim 1, characterized in that: A tensioner (4) is connected to the wire rope (3).

4. The method for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe as described in claim 1, characterized in that: It also includes a positioning pin (50), which is inserted into a hole (9) on the base (52).

5. The method for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe as described in claim 1, characterized in that: After step D is completed, a positioning pin (50) is driven into the hole (9) on the base (52).

6. The method for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe as described in claim 1, characterized in that: The number of concrete pouring funnel openings (21) in step 5) is 2.

7. The method for installing the water-stop steel sleeve at the entrance and exit of the jacking pipe as described in claim 1, characterized in that: After step 5) is completed, the exposed parts of the water-stop steel sleeve (8) are coated with anti-rust paint.

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