Method for installing water supply and drainage pipeline in pipe jacking pipeline

Abstract

The invention discloses a method for installing a water supply and drainage pipeline in a pipe jacking pipeline, relates to the field of water supply and drainage pipeline construction, and solves the problems that an existing installation method is low in construction efficiency, and construction quality is difficult to guarantee. According to the technical scheme, the method for installing the water supply and drainage pipeline in the pipe-jacking pipeline comprises the steps that the pipe-jacking pipeline is arranged between a first vertical shaft and a second vertical shaft, firstly, a first working platform is installed at the bottom of the first vertical shaft, a track is laid, and a second working platform is installed at the bottom of the second vertical shaft, and a winch is installed; mounting a first water supply and drainage pipeline, sleeving hoops at two ends of the water supply and drainage pipeline respectively, and fixing brackets and rollers at the bottoms of the hoops; then the next section of water supply and drainage pipeline is installed, and the water supply and drainage pipeline to be installed is fixedly connected with the installed water supply and drainage pipeline; and the operation is repeated until all the water supply and drainage pipelines are installed. And finally, sand blasting filling or grouting is conducted on an annular cavity between the pipe jacking pipeline and the water supply and drainage pipeline. The method is used for construction of water supply and drainage pipelines.

Description

Technical Field

[0001] This invention relates to the field of water supply and drainage pipeline construction, and more particularly to a method for laying pipes, specifically a method for installing water supply and drainage pipelines inside a jacking pipe. Background Technology

[0002] In municipal underground pipeline engineering, pipe jacking technology, with its trenchless advantages, can reduce road surface damage and avoid traffic interference, making it a key construction method for traversing complex geological formations. When installing water supply and drainage pipes within pipe jacking systems, both efficiency and reliability must be considered. Due to its performance and cost advantages, ductile iron pipes have become the preferred choice for municipal water supply and drainage pipelines.

[0003] When installing ductile iron pipes as water supply and drainage pipes within a pipe jacking system, the placement and splicing of the ductile iron pipes are typically achieved through manual pushing or simple roller assistance. This construction method presents the following problems: First, a single ductile iron pipe section is 6m long and heavy, making it difficult to move. Manual handling and moving are extremely strenuous, resulting in low construction efficiency and significant safety hazards. Second, precise position control is difficult when splicing two ductile iron pipe sections, easily leading to misalignment or eccentricity. This results in uneven or insufficient compression of the sealing ring at the joint, affecting the sealing performance and creating a potential leakage risk. Third, the lack of stable support and guiding structures during installation leads to high resistance during the sliding process of the ductile iron pipes, and uneven stress on the pipes, making them prone to jamming, scratches on the outer wall of the pipe, and damage to the socket joint.

[0004] In conclusion, in order to ensure the smooth installation of water supply and drainage pipelines while guaranteeing construction safety and quality, it is urgent to develop a method for installing water supply and drainage pipelines inside pipe jacking. Summary of the Invention

[0005] This invention provides a method for installing water supply and drainage pipes inside a jacking pipe, which solves the problems of low construction efficiency and difficulty in ensuring construction quality in existing installation methods.

[0006] The technical solution adopted in this invention is: a method for installing water supply and drainage pipes inside a jacking pipe, wherein a jacking pipe is provided between the first shaft and the second shaft, and the method for installing the water supply and drainage pipes includes the following steps.

[0007] S1. Install a first working platform at the bottom of the first shaft, and lay at least two tracks on the first working platform. Each track is arranged along the direction of the jacking pipe, and one end of each track is smoothly connected to the end of the jacking pipe located in the first shaft. Install a second working platform at the bottom of the second shaft, and install a winch on the second working platform. The winch is located on the central axis of the jacking pipe.

[0008] To minimize the impact of construction, the specific measures are as follows: the pipe jacking system is formed by jacking reinforced concrete pipes, the first shaft is the working shaft for jacking, and the second shaft is the receiving shaft for jacking.

[0009] Specifically: Both the first and second working platforms are steel structure platforms, and the tracks are channel steel. In step S1, the tracks are leveled so that the top surface of the tracks is flush with the inner wall of the jacking pipe.

[0010] S2. Install the first section of water supply and drainage pipe. First, fit a clamp on each end of the water supply and drainage pipe. The bottom of the clamp is fixed with a bracket, and the bracket at the bottom of the clamp is connected to at least two rollers. Then, hoist the water supply and drainage pipe to the first working platform, and place the rollers on the track. Finally, use a winch to introduce the water supply and drainage pipe into the jacking pipe, leaving the rear end of the water supply and drainage pipe in the first vertical shaft.

[0011] S3. To install the next section of water supply and drainage pipe, first, fit a clamp on each end of the water supply and drainage pipe to be installed. The bottom of the clamp is fixed with a bracket, and the bracket at the bottom of the clamp is connected to at least two rollers. Then, hoist the water supply and drainage pipe to be installed onto the first working platform, place the rollers on the track, and fix the clamp at the front end of the water supply and drainage pipe to be installed to the clamp at the rear end of the already installed water supply and drainage pipe. Finally, use a winch to guide the water supply and drainage pipe to be installed into the jacking pipe, leaving the rear end of the water supply and drainage pipe to be installed in the first vertical shaft.

[0012] To better control the position of the water supply and drainage pipes within the jacking pipe, furthermore: in steps S2 and S3, a bracket is fixed to the top of the clamp, and at least one roller is connected to the bracket at the top of the clamp. The diameter of the circumscribed circle corresponding to each roller on the outer periphery of the clamp is not greater than the inner diameter of the jacking pipe.

[0013] To further improve the flexibility of the rollers, the bracket fixed to the clamp is equipped with support legs, which are arranged radially along the clamp. The support legs are adjustable in length, and the rollers are mounted on the support legs. The rollers are swivel casters.

[0014] To further improve the stability of the clamp, in steps S2 and S3, a padding layer is provided between the clamp and the water supply and drainage pipe.

[0015] To facilitate construction and improve construction quality, specifically: in steps S2 and S3, the water supply and drainage pipes are ductile iron pipes, with matching sockets and spigots at both ends, and a sealing ring between the sockets and spigots of two connected ductile iron pipe sections.

[0016] To facilitate the introduction of each section of water supply and drainage pipe into the jacking pipe and avoid damage to the water supply and drainage pipe, further steps are taken: In steps S2 and S3, the rear end of the water supply and drainage pipe is placed on the traction sliding bracket, the traction rope of the winch passes through the jacking pipe and is connected to the traction sliding bracket, and then the water supply and drainage pipe is pushed into the jacking pipe; wherein, the traction sliding bracket includes a base, the bottom surface of the base is provided with wheels adapted to the track, the top surface of the base is fixed with a baffle, the rear end of the water supply and drainage pipe is placed between the base and the baffle, the diameter of the baffle is not less than the outer diameter of the water supply and drainage pipe, a connector is provided at the center of the baffle, and the traction rope is connected to the connector.

[0017] To ensure the stability of the splicing of the two water supply and drainage pipes, in step S3, the clamp at the front end of the water supply and drainage pipe to be installed is fixedly connected to the clamp at the rear end of the installed water supply and drainage pipe by at least two crossbars.

[0018] S4. Repeat step S3 until the installation of all water supply and drainage pipes is completed.

[0019] To further improve the construction quality of water supply and drainage pipelines, in steps S2 to S4, after the water supply and drainage pipelines enter the jacking pipe, the central axis of the water supply and drainage pipelines coincides with the central axis of the jacking pipe.

[0020] S5. The annular cavity between the inner wall of the jacking pipe and the outer wall of the water supply and drainage pipe is filled with sand or grouted.

[0021] The beneficial effects of this invention are as follows: The water supply and drainage pipes are supported by brackets on the outer periphery of the clamps. Rollers are installed on the brackets at the bottom of the clamps. After the water supply and drainage pipes are hoisted into the first vertical shaft, the rollers are placed on the track. Because the track is smoothly connected to the jacking pipe, the water supply and drainage pipes can be quickly, smoothly, and with low resistance introduced into the jacking pipe. This invention reduces the impact on the water supply and drainage pipes during the insertion process, making them less prone to scratches and ensuring the sealing reliability of the pipe connections. The water supply and drainage pipes are introduced into the jacking pipe using a winch, which not only saves labor but also facilitates control over the displacement of the water supply and drainage pipes, ensuring the docking accuracy and construction efficiency. Clamps are fitted at both ends of the water supply and drainage pipes, and the clamps of adjacent sections are fixedly connected, facilitating dynamic alignment and stable connection between adjacent sections. The coaxiality of adjacent sections can be stably controlled within ±5mm. The brackets and rollers on the outer side of the clamps can also control the position of the water supply and drainage pipes within the jacking pipe, making it easier to ensure that the central axis of the water supply and drainage pipe coincides with the central axis of the jacking pipe. The invention relates to a compact structure with strong spatial adaptability, allowing for normal construction regardless of whether the central axis of the jacking pipe is straight or curved. Attached Figure Description

[0022] Figure 1This is a schematic diagram of an embodiment of the present invention.

[0023] Figure 2 yes Figure 1 Enlarged view of the connection between the two sections of water supply and drainage pipes.

[0024] Figure 3 yes Figure 1 A cross-sectional schematic diagram of the location of the clamp on the water supply and drainage pipe.

[0025] Figure 4 yes Figure 1 Enlarged view of the traction sliding bracket.

[0026] Figure 5 yes Figure 4 The right view.

[0027] Reference numerals in the attached drawings: 1. First vertical shaft; 2. Second vertical shaft; 3. Pipeline jacking; 4. Water supply and drainage pipeline; 5. First working platform; 6. Track; 7. Second working platform; 8. Winch; 9. Clamp; 10. Support; 11. Roller; 12. Sealing ring; 13. Traction sliding bracket; 13-1. Base; 13-2. Wheel; 13-3. Baffle; 13-4. Connector; 14. Traction rope; 15. Crossbar. Detailed Implementation

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] like Figure 1 As shown, this invention discloses a method for installing water supply and drainage pipes inside a jacking pipe. The two ends of the jacking pipe 3 are located inside a first vertical shaft 1 and a second vertical shaft 2, respectively; that is, the jacking pipe 3 is located between the first vertical shaft 1 and the second vertical shaft 2. The method for installing water supply and drainage pipes inside the jacking pipe includes the following steps.

[0030] S1. A first working platform 5 is installed at the bottom of the first shaft 1, and at least two tracks 6 are laid on the first working platform 5. For ease of construction, there are generally two tracks 6. Each track 6 is arranged along the direction of the jacking pipe 3, and one end of each track 6 is smoothly connected to the end of the jacking pipe 3 located in the first shaft 1, that is, the roller 11 can smoothly enter the jacking pipe 3 from the first shaft 1 along the track 6. A second working platform 7 is installed at the bottom of the second shaft 2, and a winch 8 is installed on the second working platform 7. The winch 8 is located on the central axis of the jacking pipe 3.

[0031] To minimize the impact of construction, the pipe jacking system 3 is formed by jacking reinforced concrete pipes using a jacking process. The first shaft 1 serves as the working shaft for the jacking, and the second shaft 2 serves as the receiving shaft. The first working platform 5 is erected at the bottom of the first shaft 1, and the second working platform 7 is erected at the bottom of the second shaft 2. Both platforms serve a leveling function and lay the foundation for the subsequent installation of water supply and drainage pipes 4 within the pipe jacking system 3. The first and second working platforms 5 and 7 are generally temporary structures; for ease of dismantling later, both are steel structure platforms. During construction, the bottom of the first and second shafts 1 and 2 are thoroughly cleaned of debris. After checking the stability of the shaft walls, the steel structure platforms are finally erected at the bottom of the shafts. I-beam steel working platforms are preferred.

[0032] At least two tracks 6 are laid on the top surface of the first working platform 5. When the water supply and drainage pipe 4 is introduced into the jacking pipe 3, the tracks 6 play a role in adjusting the posture and position of the water supply and drainage pipe 4, as well as guiding it and reducing movement resistance. There are generally two tracks 6, and each track 6 is arranged along the direction of the jacking pipe 3, that is, the central axis of each track 6 is parallel to the central axis of the jacking pipe 3. One end of each track 6 is smoothly connected to the end of the jacking pipe 3 located in the first vertical shaft 1, that is, the top surface of each track 6 smoothly transitions to the inner wall of the corresponding position of the jacking pipe 3, and the rollers 11 placed on the tracks 6 can smoothly enter the jacking pipe 3 from the first vertical shaft 1 along the tracks 6. The tracks 6 are generally steel rails. Considering that the weight of the water supply and drainage pipe 4 is not too large, the tracks 6 can be made of channel steel. In order to ensure the stability of the water supply and drainage pipe 4 after it is placed on the tracks 6, step S1 also levels the tracks 6, that is, adjusts the tracks 6 to be on a horizontal plane.

[0033] S2. Install the first section of water supply and drainage pipe 4. First, install a clamp 9 at each end of the water supply and drainage pipe 4, such as... Figure 2 and Figure 3 As shown, a bracket 10 is fixed to the bottom of the clamp 9, and at least two rollers 11 are connected to the bracket 10 at the bottom of the clamp 9; then, the water supply and drainage pipe 4 is hoisted to the first working platform 5, and the rollers 11 are placed on the track 6; finally, the water supply and drainage pipe 4 is introduced into the jacking pipe 3 by the winch 8, and the rear end of the water supply and drainage pipe 4 remains in the first vertical shaft 1.

[0034] The clamp 9 secures the end of the water supply and drainage pipe 4. The bracket 10 and rollers 11 at the bottom of the clamp 9 support the water supply and drainage pipe 4. There are generally two rollers 11 at the bottom of the clamp 9. For example, the clamp 9 is positioned 50cm from the end of the water supply and drainage pipe 4. After the water supply and drainage pipe 4 is hoisted onto the first working platform 5 and the rollers 11 are placed on the track 6, with the top surface of the track 6 flush with the inner wall of the jacking pipe 3, the water supply and drainage pipe 4, the clamp 9 fixed to the water supply and drainage pipe 4, the bracket 10 fixed to the clamp 9, and the rollers 11 fixed to the bracket 10 form a single unit, allowing for smooth entry into the jacking pipe 3 from the track 6. Since the jacking pipe 3 has a circular cross-section, the rollers 11 of the bracket 10 at the bottom of the clamp 9 need to be adapted to rolling within the jacking pipe 3. For example, the central angle between the two rollers 11 at the bottom of the clamp 9 is 60°. Figure 3 As shown.

[0035] The traction rope 14 of the winch 8 applies power to the water supply and drainage pipe 4, pulling or pushing it into the jacking pipe 3. The traction speed of the winch 8 is generally ≤5m / min to ensure safety. To enhance safety, the winch 8 is equipped with a remote control module, an emergency braking device, and a rope breakage protection device. To facilitate the connection between the first section of the water supply and drainage pipe 4 and the next section, the rear end of the first section of the water supply and drainage pipe 4 remains inside the first vertical shaft 1. The rear end of the water supply and drainage pipe 4 refers to the end of the water supply and drainage pipe 4 that is furthest from the winch 8. For example, the length of the first section of the water supply and drainage pipe 4 reserved inside the first vertical shaft 1 is 100cm.

[0036] S3. Install the next section of water supply and drainage pipe 4. First, install a clamp 9 at each end of the water supply and drainage pipe 4 to be installed, such as... Figure 2 and Figure 3 As shown, a bracket 10 is fixed to the bottom of the clamp 9, and at least two rollers 11 are connected to the bracket 10 at the bottom of the clamp 9. Then, the water supply and drainage pipe 4 to be installed is hoisted to the first working platform 5, the rollers 11 are placed on the track 6, and the clamp 9 at the front end of the water supply and drainage pipe 4 to be installed is fixedly connected to the clamp 9 at the rear end of the installed water supply and drainage pipe 4. That is, the fixed connection between the clamps 9 is achieved. Finally, the water supply and drainage pipe 4 to be installed is introduced into the jacking pipe 3 by the winch 8, and the rear end of the water supply and drainage pipe 4 to be installed remains in the first vertical shaft 1.

[0037] The central axis of the jacking pipe 3 is generally a horizontal straight line. To facilitate the construction of the water supply and drainage pipe 4, the central axis of the track 6 is parallel to the central axis of the jacking pipe 3. The central axis of the jacking pipe 3 may be curved. To facilitate the construction of the water supply and drainage pipe 4, the central axis of the track 6 is parallel to the central axis of the inlet section of the jacking pipe 3 (the section where the jacking pipe 3 connects to the first vertical shaft 1).

[0038] The height of the water supply and drainage pipe 4 within the jacking pipe 3 is determined by the support 10 at the bottom of the clamp 9 and the roller 11. To better control the position of the water supply and drainage pipe 4 within the jacking pipe 3, in steps S2 and S3, a support 10 is fixed to the top of the clamp 9, and at least one roller 11 is connected to the support 10 at the top of the clamp 9. For example, as... Figure 3 As shown, the bracket 10 at the top of the clamp 9 is connected to two rollers 11, with a central angle of 60° between the two rollers 11. The rollers 11 at the top of the clamp 9 are used for limiting and sliding, while the rollers 11 at the bottom of the clamp 9 are used for support, positioning, and traction sliding. The diameter of the circumscribed circle corresponding to each roller 11 on the outer periphery of the clamp 9 is not greater than the inner diameter of the jacking pipe 3, ensuring that the water supply and drainage pipe 4 can smoothly enter the jacking pipe 3. The diameter of the circumscribed circle corresponding to each roller 11 on the outer periphery of the clamp 9 is 15% smaller than the inner diameter D of the jacking pipe 3, allowing it to be used in bends with a radius of curvature ≥30D. To allow adjustment of the diameter of the circumscribed circle corresponding to each roller 11 on the outer periphery of the clamp 9, the bracket 10 fixed to the clamp 9 is provided with legs. The legs are arranged radially along the clamp 9 and have an adjustable length. The rollers 11 are installed on the legs. For example, the legs are screws threaded to the bracket 10. The rollers 11 installed on the outer periphery of a clamp 9 can be either directional wheels or swivel wheels. All rollers 11 can be directional wheels, all swivel wheels, or a combination of both. To ensure the stability of the bracket 10, the clamp 9 must be securely fastened to the water supply and drainage pipe 4 while avoiding damage to the pipe 4. Therefore, in steps S2 and S3, a padding layer can be placed between the clamp 9 and the water supply and drainage pipe 4. For example, the padding layer can be a rubber pad.

[0039] Steps S2 and S3 introduce the water supply and drainage pipe 4 into the jacking pipe 3. To avoid damage to the water supply and drainage pipe 4, the traction rope 14 of the winch 8 preferably applies a pushing force to the water supply and drainage pipe 4, pushing it into the jacking pipe 3. Figure 1 As shown, the rear end of the water supply and drainage pipe 4 is placed on the traction sliding bracket 13. The traction rope 14 of the winch 8 passes through the jacking pipe 3 and is connected to the traction sliding bracket 13, then pushes the water supply and drainage pipe 4 into the jacking pipe 3. Figure 4 and Figure 5As shown, the traction sliding bracket 13 includes a base 13-1, with wheels 13-2 adapted to the track 6 on the bottom surface of the base 13-1, and a baffle 13-3 fixed on the top surface of the base 13-1. The rear end of the water supply and drainage pipe 4 is placed between the base 13-1 and the baffle 13-3. A connector 13-4 is provided at the center of the baffle 13-3, and the traction rope 14 is connected to the connector 13-4. A groove can also be provided on the top surface of the base 13-1 to improve the stability of the rear end of the water supply and drainage pipe 4 placed between the base 13-1 and the baffle 13-3. The diameter of the baffle 13-3 is not less than the outer diameter of the water supply and drainage pipe 4, ensuring that the baffle 13-3 can apply a uniform thrust to the rear end of the water supply and drainage pipe 4. The connector 13-4 at the center of the baffle 13-3 is generally a lifting lug or lifting ring for connection with the traction rope 14 of the winch 8.

[0040] The water supply and drainage pipe 4 uses existing pipes. To facilitate construction and improve construction quality, the water supply and drainage pipe 4 is a ductile iron pipe. Both ends of the ductile iron pipe are equipped with matching sockets and spigots. A sealing ring 12 is installed between the sockets and spigots of two connected sections of ductile iron pipe. The length of one section of ductile iron pipe is generally 6m. The pipe socket has two enlarged ends, with an annular groove on the outer edge of the enlarged end for installing the sealing ring 12. The sealing ring 12 is generally made of rubber and has a wedge-shaped cross-section. To ensure the stability of the splicing of the two sections of water supply and drainage pipe 4, in step S3, the clamp 9 at the front end of the water supply and drainage pipe 4 to be installed is fixedly connected to the clamp 9 at the rear end of the already installed water supply and drainage pipe 4 by at least two crossbars 15, forming a synchronous force-bearing and splicing limiting structure. The crossbars 15 are arranged circumferentially along the joint of the water supply and drainage pipe 4, and are generally angle steel or strip steel. The clamps 9 at the ends of two adjacent water supply and drainage pipe sections 4 are rigidly connected by crossbars 15. The clamps 9, in addition to their constraint, ensure dynamic alignment and a stable connection between the two adjacent water supply and drainage pipe sections 4. With laser assistance during construction, the coaxiality of the two adjacent water supply and drainage pipe sections 4 can be stably controlled within ±5mm.

[0041] S4. Repeat step S3 until the installation of all water supply and drainage pipes 4 is completed.

[0042] After the water supply and drainage pipe 4 enters the jacking pipe 3, the water supply and drainage pipe 4 may be centered or not. Preferably, the water supply and drainage pipe 4 is centered, that is, the central axis of the water supply and drainage pipe 4 coincides with the central axis of the jacking pipe 3.

[0043] S5. The annular cavity between the inner wall of the jacking pipe 3 and the outer wall of the water supply and drainage pipe 4 is filled with sand or grouted. The purpose of step S5 is to stabilize the water supply and drainage pipe 4 and to finally permanently fix the water supply and drainage pipe 4.

Claims

1. A method for installing water supply and drainage pipes inside a pipe jacking system, wherein a pipe jacking system (3) is provided between a first vertical shaft (1) and a second vertical shaft (2), characterized in that, The method for installing water supply and drainage pipes (4) includes the following steps: S1. Install a first working platform (5) at the bottom of the first shaft (1) and lay at least two tracks (6) on the first working platform (5). Each track (6) is arranged along the direction of the jacking pipe (3), and one end of each track (6) is smoothly connected to one end of the jacking pipe (3) located in the first shaft (1). Install a second working platform (7) at the bottom of the second shaft (2) and install a winch (8) on the second working platform (7). The winch (8) is located on the central axis of the jacking pipe (3). S2. Install the first section of water supply and drainage pipe (4). First, fit a clamp (9) on both ends of the water supply and drainage pipe (4). The bottom of the clamp (9) is fixed with a bracket (10). The bracket (10) at the bottom of the clamp (9) is connected to at least two rollers (11). Then, hoist the water supply and drainage pipe (4) to the first working platform (5). Place the rollers (11) on the track (6). Finally, use a winch (8) to introduce the water supply and drainage pipe (4) into the jacking pipe (3). The rear end of the water supply and drainage pipe (4) remains in the first vertical shaft (1). S3. Install the next section of water supply and drainage pipe (4). First, fit a clamp (9) on both ends of the water supply and drainage pipe (4) to be installed. The bottom of the clamp (9) is fixed with a bracket (10). The bracket (10) at the bottom of the clamp (9) is connected to at least two rollers (11). Then, hoist the water supply and drainage pipe (4) to be installed to the first working platform (5). Place the rollers (11) on the track (6) and fix the clamp (9) at the front end of the water supply and drainage pipe (4) to the clamp (9) at the rear end of the installed water supply and drainage pipe (4). Finally, use a winch (8) to introduce the water supply and drainage pipe (4) to be installed into the jacking pipe (3). The rear end of the water supply and drainage pipe (4) to be installed remains in the first vertical shaft (1). S4. Repeat step S3 until the installation of all water supply and drainage pipes (4) is completed; S5. The annular cavity between the inner wall of the jacking pipe (3) and the outer wall of the water supply and drainage pipe (4) is filled with sand or grout.

2. The method for installing water supply and drainage pipes inside a jacking pipe as described in claim 1, characterized in that: The jacking pipe (3) is formed by jacking reinforced concrete pipes. The first vertical shaft (1) is the jacking working shaft, and the second vertical shaft (2) is the jacking receiving shaft.

3. The method for installing water supply and drainage pipes inside a jacking pipe as described in claim 1, characterized in that: The first working platform (5) and the second working platform (7) are both steel structure platforms. The track (6) is a channel steel. In step S1, the track (6) is leveled so that the top surface of the track (6) is flush with the inner wall of the jacking pipe (3).

4. The method for installing water supply and drainage pipes inside a jacking pipe as described in claim 1, characterized in that: In steps S2 and S3, a bracket (10) is fixed to the top of the clamp (9), and at least one roller (11) is connected to the bracket (10) at the top of the clamp (9). The diameter of the outer circle corresponding to each roller (11) on the outer periphery of the clamp (9) is not greater than the inner diameter of the jacking pipe (3).

5. The method for installing water supply and drainage pipes inside a jacking pipe as described in claim 4, characterized in that: The bracket (10) fixed to the clamp (9) is provided with legs. The legs are arranged radially along the clamp (9). The legs are of adjustable length. Rollers (11) are installed on the legs. The rollers (11) are universal wheels.

6. The method for installing water supply and drainage pipes inside a pipe jacking system as described in any one of claims 1 to 5, characterized in that: In steps S2 and S3, a padding layer is also provided between the clamp (9) and the water supply and drainage pipe (4).

7. The method for installing water supply and drainage pipes inside a jacking pipe as described in any one of claims 1 to 5, characterized in that: In steps S2 and S3, the water supply and drainage pipe (4) is a ductile iron pipe. Both ends of the ductile iron pipe are equipped with matching sockets and spigots. A sealing ring (12) is provided between the sockets and spigots of the two connected ductile iron pipe sections.

8. The method for installing water supply and drainage pipes inside a jacking pipe as described in any one of claims 1 to 5, characterized in that: In steps S2 and S3, the rear end of the water supply and drainage pipe (4) is placed on the traction sliding bracket (13), and the traction rope (14) of the winch (8) passes through the jacking pipe (3) and is connected to the traction sliding bracket (13), and then the water supply and drainage pipe (4) is pushed into the jacking pipe (3); wherein, the traction sliding bracket (13) includes a base (13-1), the bottom surface of the base (13-1) is provided with a wheel (13-2) adapted to the track (6), the top surface of the base (13-1) is fixed with a baffle (13-3), the rear end of the water supply and drainage pipe (4) is placed between the base (13-1) and the baffle (13-3), the diameter of the baffle (13-3) is not less than the outer diameter of the water supply and drainage pipe (4), and a connector (13-4) is provided at the center of the baffle (13-3), and the traction rope (14) is connected to the connector (13-4).

9. The method for installing water supply and drainage pipes inside a jacking pipe as described in any one of claims 1 to 5, characterized in that: In step S3, the clamp (9) at the front end of the water supply and drainage pipe (4) to be installed is fixedly connected to the clamp (9) at the rear end of the water supply and drainage pipe (4) that has been installed by at least two crossbars (15).

10. The method for installing water supply and drainage pipes inside a jacking pipe as described in any one of claims 1 to 5, characterized in that: In steps S2 to S4, after the water supply and drainage pipe (4) enters the jacking pipe (3), the central axis of the water supply and drainage pipe (4) coincides with the central axis of the jacking pipe (3).

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