Pipe jacking construction hole opening water stopping device

Abstract

The utility model relates to the field of pipe jacking construction, in particular to a water stop device for a pipe jacking construction hole, which comprises a mounting part and a first rubber sealing plate, the mounting part and the first rubber sealing plate are both annularly arranged, the first rubber sealing plate is arranged at the hole, and the first rubber sealing plate and the hole are coaxially arranged; the mounting piece is fixedly arranged on the well wall on the peripheral side of the hole, a first mounting groove is formed in the mounting piece, and the first mounting groove is used for fixing the first rubber sealing plate; the inner ring diameter of the first rubber sealing plate is smaller than the diameter of the peripheral face of the jacking pipe, a water blocking head is arranged on the inner ring side of the first rubber sealing plate and used for abutting against the peripheral face of the jacking pipe, and the section of the water blocking head is in a regular polygon shape. Due to the fact that the polygonal water blocking head is arranged at the end of the rubber sealing plate, the contact area of the sealing position is increased, the sealing effect is improved, the stress strength of the water blocking plate is effectively enhanced by means of the stability of the polygonal structure, and the service life of a water stopping component is prolonged.

Description

A water-stopping device for pipe jacking construction openings Technical Field

[0001] This utility model relates to the field of pipe jacking construction, and in particular to a water-stopping device for the opening of a pipe jacking construction tunnel. Background Technology

[0002] In modern urban construction, there are numerous tunnel excavation projects to make better use of underground space. In the process of pipe jacking, working shafts are generally set up at both ends of the tunnel. The pipe jacking machine is lowered into one working shaft and then excavates underground through the pipe to the other working shaft to exit the tunnel. Then it is lifted out of the working shaft to complete the tunnel excavation. Water-stopping measures need to be arranged at the tunnel entrance for pipe jacking construction, mainly to prevent mud and water from seeping into the working shaft when the pipe jacking machine enters and exits the tunnel, so as to avoid construction interruption or safety hazards due to soil and water loss in the working shaft.

[0003] Currently, a Chinese patent with announcement number CN 208845192 U and announcement date of May 10, 2019, proposes a water-stopping device for the inlet of a jacking pipe, including a rubber sealing plate; a rubber sealing plate is fixed at the inlet of the jacking pipe, and a through hole is opened on the rubber sealing plate, which is coaxial with the inlet; the edge of the hole of the rubber sealing plate abuts against the outer wall of the jacking pipe; an annular pressure plate is fixed on the side of the rubber sealing plate away from the inlet; a pad is provided between the annular pressure plate and the rubber sealing plate; and several tension springs are fixed between the edge of the hole of the rubber sealing plate and the annular pressure plate, which are arranged in a circumferential direction, and each tension spring is arranged along the axial direction of the jacking pipe.

[0004] During use, as the jacking pipe passes through the rubber sealing plate and is pushed into the hole, the tension spring between the annular pressure plate and the rubber sealing plate ensures that the edge of the rubber sealing plate orifice and the outer wall of the jacking pipe always maintain good contact.

[0005] Regarding the aforementioned technologies, when the rubber sealing plate comes into contact with the outer wall of the jacking pipe, the end of the rubber sealing plate only seals against the outer wall of the jacking pipe through the arc surface or edge. The contact area between the rubber sealing plate and the outer wall of the jacking pipe is too small, resulting in poor sealing effect. In particular, after long-term frictional contact between the rubber sealing plate and the outer wall of the jacking pipe, some parts of the rubber sealing plate will wear down, and the sealing effect will be further reduced. Summary of the Invention

[0006] In order to improve the sealing performance of the opening in pipe jacking construction and enhance the water-stopping effect, this utility model provides a water-stopping device for the opening in pipe jacking construction.

[0007] This utility model provides a water-stopping device for the opening of a pipe jacking construction project, which adopts the following technical solution:

[0008] A water-stopping device for a pipe jacking construction opening includes an mounting component and a first rubber sealing plate. Both the mounting component and the first rubber sealing plate are arranged in a ring shape. The first rubber sealing plate is located at the opening and is coaxial with the opening. The mounting component is fixedly mounted on the well wall around the opening and has a first mounting groove for fixing the first rubber sealing plate. The inner ring diameter of the first rubber sealing plate is smaller than the outer circumference diameter of the pipe jacking. A water-blocking head is provided on the inner ring side of the first rubber sealing plate, which abuts against the outer circumference of the pipe jacking. The cross-section of the water-blocking head is a regular polygon.

[0009] Existing annular rubber sealing plates typically have a circular or straight-cut inner ring edge. When the inner ring edge is circular, only a portion of the rubber sealing plate's arc-shaped structure contacts the outer circumference of the jacking pipe when the sealing plate is pressed against it, resulting in a small contact area and poor sealing performance. When the inner ring edge is straight-cut, the straight-cut surface of the inner ring edge contacts the outer circumference of the jacking pipe, increasing the contact area and improving the sealing performance. However, as the jacking pipe moves forward continuously, the edge of the rubber sealing plate bends and deforms due to friction. This causes only a portion of the straight-cut surface of the inner ring edge to adhere to the outer circumference of the jacking pipe, further reducing the contact area and resulting in poor sealing performance for a moving jacking pipe when the inner ring edge is straight-cut.

[0010] By adopting the above technical solution, the water-blocking head adopts a regular polygonal cross-section. When the jacking pipe is stationary, the contact surface of the end of the water-blocking head abuts against the outer circumference of the jacking pipe, forming a surface seal. When the jacking pipe moves, the water-blocking head rotates with the forward movement of the jacking pipe, allowing the side of the water-blocking head to directly contact the outer wall of the jacking pipe, forming a surface seal and giving the rubber sealing plate a larger contact area with the outer wall of the stationary pipe. As the jacking pipe continues to advance, the water-blocking head will roll with the movement of the jacking pipe. When the water-blocking head rolls against the outer wall of the jacking pipe, the regular polygonal structure of the water-blocking head can maintain its position regardless of the angle it rolls to. The design ensures that one side of the water-blocking head stably adheres to the surface of the jacking pipe, maintaining a surface seal between the water-blocking head and the rubber sealing plate. The rigid, regular polygonal structure provides strong stability, reducing deformation caused by friction and pressure, and minimizing the probability of the sealing surface shrinking due to bending deformation of the water-blocking head. Furthermore, setting the inner ring diameter of the first rubber sealing plate to be smaller than the outer ring diameter of the jacking pipe allows the first rubber sealing plate to elastically deform when the jacking pipe passes through it, pressing the water-blocking head tightly against the outer circumference of the jacking pipe, resulting in a tighter fit and enhanced sealing. Thus, the regular polygonal design of the water-blocking head effectively solves the problems of small contact area and easy deformation. By placing the water-blocking head at the end of the rubber sealing plate, the increased contact area and stability of the contact surface significantly improve the sealing effect of the jacking pipe construction opening and the durability of the water-stopping device.

[0011] Optionally, the cross-section of the water-blocking head is a regular hexagon.

[0012] By adopting the above technical solution, when the hexagonal structure is subjected to external forces (such as tension, pressure, torque, etc.), the load borne by each side and the rubber cutting is more balanced compared with other shapes, effectively reducing the phenomenon of local stress concentration. When the hexagonal structure is used on rubber sealing plates that require pressure and torsion resistance, the high stability and uniform force distribution characteristics of the hexagon can be utilized to enable the regular hexagonal water baffle to provide six more uniform contact surfaces. During the pipe jacking operation, it can more evenly abut against the outer circumference of the pipe for sealing. While reducing local stress concentration, it can also provide more stable contact, further enhancing the reliability and service life of the seal.

[0013] Optionally, a second rubber sealing plate is also provided. The mounting component has a second mounting groove on the side of the first mounting groove away from the opening. The second rubber sealing plate is disposed in the second mounting groove. The inner ring diameter of the second rubber sealing plate is the same as the diameter of the outer circumference of the jacking pipe. A water-blocking head is provided on the inner ring side of the second rubber sealing plate. The water-blocking head is used to abut against the outer circumference of the jacking pipe.

[0014] By adopting the above technical solution, the second rubber sealing plate is set outside the first rubber sealing plate, forming a second sealing barrier. When the first rubber sealing plate wears down due to long-term friction, the water-blocking head of the second rubber sealing plate continues to adhere to the outer wall of the jacking pipe, providing a backup sealing effect. Since the first rubber sealing plate can already prevent the outflow of two parts of mud water, the second rubber sealing plate does not need to provide a large pressure to achieve a sealing effect. Furthermore, the inner ring diameter of the second rubber sealing plate is the same as the diameter of the outer circumference of the jacking pipe, resulting in low friction between the water-blocking head on the second rubber sealing plate and the outer wall of the jacking pipe, thus reducing wear on the second rubber sealing plate. In this way, the double rubber sealing plate setup, through redundant design, improves the continuity and reliability of the seal, especially maintaining stable water stoppage during long-term jacking pipe operation, reducing the problem of reduced single-seal effectiveness due to wear.

[0015] Optionally, the mounting component is provided with a first support portion and a second support portion. The first support portion is disposed between the first mounting groove and the second mounting groove, and extends toward the center of the mounting component to support the first rubber sealing plate. The second support portion is disposed on the side of the second mounting groove away from the first mounting groove, and extends toward the center of the mounting component to support the second rubber sealing plate.

[0016] By adopting the above technical solution, the first support part can support the first rubber sealing plate, and the second support part can support the second rubber sealing plate, reducing the problem of excessive bending or excessive displacement under the pressure of mud and water during pipe jacking. The support part extends towards the center, helping the water-blocking heads on the first and second rubber sealing plates to be kept in the correct position, so that the water-blocking heads always make uniform contact with the surface of the pipe jacking. The physical support maintains the contact area and sealing pressure, reducing the problem of loose sealing caused by the deformation of the sealing plate, and improving the stability and durability of the seal.

[0017] Optionally, a sealing support is also included. The mounting component is further provided with a limiting part, which is arranged in a ring shape. The limiting part is located on the side of the second support away from the opening and extends toward the side away from the opening. The sealing support is arranged in a ring shape, with the outer peripheral surface of the sealing support abutting against the inner peripheral surface of the limiting part, and the inner peripheral surface of the sealing support abutting against the outer peripheral surface of the jacking pipe.

[0018] By adopting the above technical solution, the sealing support is installed within the limiting part, allowing the outer wall of the jacking pipe to be supported within the limiting part, providing additional sealing and support for the jacking pipe. During jacking pipe movement, the sealing support slides relative to the jacking pipe on its outer circumference, absorbing vibrations and reducing pressure on the bottom of the rubber sealing plate, preventing overload deformation and supplementing the sealing effect. Thus, the addition of the sealing support provides extra support for the jacking pipe, enabling stable advancement during jacking, while also providing additional sealing, enhancing the overall sealing effect, and improving the stability and water-stopping effect of the device.

[0019] Optionally, the inner circumferential surface of the limiting part is provided with an abutting part, the abutting part extends from the inner circumferential surface of the limiting part to the center position, and one end of the sealing support near the opening abuts against the abutting part.

[0020] By adopting the above technical solution, the abutment portion can restrict the position of the sealing support. During installation, the sealing support only needs to be inserted into the limiting portion along with the jacking pipe, allowing it to move forward with the jacking pipe and abut against the abutment portion. Subsequently, due to the frictional force of the jacking pipe, the sealing support will press firmly against the abutment portion and deform, causing it to gradually expand and press against the outer circumference of the limiting portion. When the outer circumference of the sealing support abuts against the inner circumference of the limiting portion, a sealing support effect is achieved. Thus, the design of the abutment portion makes the sealing support easier to install and improves the convenience of operation.

[0021] Optionally, a through-wall sleeve is also provided. The through-wall sleeve has an L-shaped cross-section. One end of the through-wall sleeve passes through the opening and abuts against the inner wall of the opening, while the other end is fixedly installed between the well wall on the outside of the opening and the mounting component.

[0022] By adopting the above technical solution, one end of the L-shaped through-wall sleeve is fixed to the inner wall of the opening, and the other end is fixed to the well wall, so that the through-wall sleeve can support the inner wall of the opening and the well wall around the opening, thereby enhancing the installation stability of the entire device.

[0023] Optionally, the mounting component may also have an anti-rust coating.

[0024] By adopting the above technical solution, the anti-rust coating is applied to the surface of the mounting parts, which can reduce the probability of corrosion when the mounting parts come into contact with mud or in a humid environment. The surface protection improves the durability of the mounting parts, enabling them to work reliably for a long time in harsh environments.

[0025] In summary, this utility model has at least one of the following beneficial technical effects:

[0026] This application increases the contact area at the sealing position and improves the sealing effect by setting a hexagonal water-blocking head at the end of the rubber sealing plate. Secondly, by utilizing the stability of the hexagonal structure, it effectively enhances the stress strength of the water-blocking plate and improves the service life of the water-stopping components.

[0027] By setting up double rubber sealing plates as two layers of water-stopping measures, the continuity and reliability of the seal are improved, especially in maintaining stable water stoppage during long-term pipe jacking, reducing the problem of reduced single-seal effect due to wear.

[0028] The integrated molding design of the mounting components allows the first and second rubber sealing plates to be installed on the mounting components and then fixed to the well wall at the opening. This improves installation accuracy, significantly shortens the construction time for installation operations inside the well, reduces construction safety risks, reduces installation difficulty, and saves construction personnel and costs. Attached Figure Description

[0029] Figure 1 is a schematic diagram of the overall structure of an embodiment of this application;

[0030] Figure 2 is an exploded view of the overall structure of an embodiment of this application;

[0031] Figure 3 is a schematic diagram of the overall structure installation position according to an embodiment of this application;

[0032] Figure 4 is a magnified view of part I in Figure 3.

[0033] Explanation of reference numerals in the attached drawings: 100, mounting component; 101, first mounting groove; 102, second mounting groove; 110, first support part; 120, second support part; 130, limiting part; 140, abutting part; 200, first rubber sealing plate; 210, water baffle head; 300, second rubber sealing plate; 400, sealing support component; 500, through-wall sleeve; 600, well wall; 601, opening; 700, jacking pipe. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to Figures 1 to 4.

[0035] This utility model discloses a water-stopping device for a pipe jacking construction opening. Referring to Figures 1 and 2, the water-stopping device for a pipe jacking construction opening mainly includes a wall-penetrating sleeve 500, an installation component 100, a first rubber sealing plate 200, a second rubber sealing plate 300, and a sealing support component 400. The first rubber sealing plate 200 and the second rubber sealing plate 300 are both mounted on the installation component 100. The wall-penetrating sleeve 500 is installed in the opening 601, and both the wall-penetrating sleeve 500 and the installation component 100 are fixedly installed on the well wall 600 at the opening 601. The sealing support component 400 is positioned between the pipe jacking 700 and the installation component 100. During pipe jacking construction, First, one end of the jacking pipe 700 is passed through the mounting component 100 and inserted into the opening 601. Then, the sealing support component 400 is fitted onto the outer circumference of the jacking pipe 700. As the jacking pipe 700 is pushed into the opening 601, the sealing support component 400 abuts against the mounting component 100 along with the jacking pipe 700. When the jacking pipe 700 is inserted into the mounting component 100, it is inserted into the first rubber sealing plate 200 and the second rubber sealing plate 300 on the mounting component 100. The first rubber sealing plate 200 and the second rubber sealing plate 300 are pressed tightly against the outer circumference of the jacking pipe 700 to seal and stop water.

[0036] Referring to Figures 1 to 3, the through-wall sleeve 500 is an L-shaped annular structure. One end of it passes through the opening 601 and contacts the inner wall of the opening 601 to provide support inside the opening 601. The other end forms a flange and is fixed to the well wall 600 outside the opening 601 by ring bolts to provide support on the well wall 600 and reduce the probability of the well wall 600 outside the opening 601 falling off.

[0037] Referring to Figures 2 to 4, the mounting component 100 is generally arranged in a ring shape. The cross-section of the mounting component 100 is "E" shaped, with two recessed positions forming two mounting grooves. Both mounting grooves are formed on the inner circumferential surface of the mounting component 100 and extend radially along the mounting component 100. The mounting groove closer to the opening 601 is the first mounting groove 101, and the mounting groove further away from the opening 601 is the second mounting groove 102. The structure between the first mounting groove 101 and the second mounting groove 102 extends towards the center of the mounting component 100 to form a first support portion 110. The first support portion 110 is generally ring-shaped, and the diameter of the inner ring of the first support portion 110 is smaller than that of the opening 601. The diameter of the second support portion 120 is such that the side wall of the second mounting groove 102 located away from the first mounting groove 101 on the mounting member 100 extends towards the center of the mounting member 100. The second support portion 120 is also annular in shape, and the inner ring diameter of the second support portion 120 is smaller than the inner ring diameter of the first support portion 110. A limiting portion 130 is also provided on the side of the second support portion 120 away from the opening 601. The limiting portion 130 is annular and extends from the second support portion 120 to the side away from the opening 601 to form a cylindrical structure. The second support portion 120 extends into the limiting portion 130, so that the end of the second support portion 120 extends out of the inner circumferential surface of the limiting portion 130 to form an abutment portion 140.

[0038] The mounting part 100 is provided with mounting holes that penetrate the mounting part 100. The mounting holes are evenly distributed in a ring around the mounting part 100. During installation, the mounting part 100 is pressed onto the flange of the through sleeve 500, and the mounting part 100 is fixed to the well wall 600 on the outer periphery of the opening 601 by ring bolts.

[0039] To reduce the probability of corrosion and rust on the mounting component 100, a waterproof paint is sprayed on the outer surface of the mounting component 100 as an anti-rust coating, thereby increasing the service life of the mounting component 100.

[0040] Referring to Figures 2 to 4, the first rubber seal is an annular rubber plate structure. The inner ring diameter of the first rubber sealing plate 200 is smaller than the outer circumferential diameter of the jacking pipe 700. A water baffle 210 is provided on the inner ring side of the first rubber sealing plate 200. The water baffle 210 is arranged around the end of the inner ring of the first rubber sealing plate 200, and the cross-section of the water baffle 210 is a regular hexagon.

[0041] Referring to Figures 2 to 4, the second rubber seal has the same structure as the first rubber seal 200, the only difference being that the inner ring diameter of the second rubber seal 300 is smaller than that of the first rubber seal 200.

[0042] Both the first rubber sealing plate 200 and the second rubber sealing plate 300 are provided with through mounting holes. During installation, the first rubber sealing plate 200 is inserted into the first mounting groove 101 of the mounting component 100, and the second rubber sealing plate 300 is inserted into the second mounting groove 102 of the mounting component 100. Then, the first rubber sealing plate 200 and the second rubber sealing plate 300 are rotated to align the mounting holes. Finally, the mounting component 100 with the first rubber sealing plate 200 and the second rubber sealing plate 300 is fixedly installed on the well wall 600 with ring bolts.

[0043] Referring to Figures 2 to 4, the sealing support 400 uses tallow packing. During installation, the tallow packing is wrapped around the limiting part 130 outside the mounting part 100 and the tallow packing is pressed tightly so that the end of the tallow packing abuts against the abutting part 140.

[0044] During the construction of the pipe jacking system 700, the pipe jacking system 700 is inserted into the opening 601 after passing through the mounting component 100. As the pipe jacking system 700 passes through the mounting component 100, it sequentially passes through the middle of the sealing support component 400, the middle of the second rubber sealing plate 300, and the middle of the first rubber sealing plate 200. When the pipe jacking system 700 passes through the middle of the first rubber sealing plate 200, the water-blocking head 210 at the end of the first rubber sealing plate 200 will deform under the contact of the pipe jacking system 700, opening the water-blocking head 210 and causing it to roll under the friction of the pipe jacking system 700. The side of the water-blocking head 210 abuts against the outer wall of the jacking pipe 700. During the jacking process of the jacking pipe 700 inside the opening 601, the side of the first rubber sealing plate 200 and the end face of the second rubber sealing plate 300 abut against the outer wall of the jacking pipe 700 to form a double seal. The sealing support 400 abuts against the outer wall of the jacking pipe 700, which can not only support, lubricate and buffer the jacking pipe 700, but also absorb the vibration during the jacking process of the jacking pipe 700 to make the jacking of the jacking pipe 700 more stable, reduce the vibration transmitted to the installation part 100, and form a third seal to further improve the water-stopping effect.

[0045] The implementation principle of the water-stopping device for pipe jacking construction openings in this embodiment of the utility model is as follows:

[0046] Before installing this water-stopping device, the dimensions and corresponding parameters of the through-wall sleeve 500 are determined according to the pipe diameter and burial depth required by the specifications. Then, one end of the determined through-wall sleeve 500 is inserted into the opening 601 for support, and the through-wall sleeve 500 is supported on the well wall 600 around the opening 601. Next, the first rubber sealing plate 200 and the second rubber sealing plate 300 are respectively installed on the mounting piece 100. Then, the mounting piece 100 with the first rubber sealing plate 200 and the second rubber sealing plate 300 is fixed to the well wall 600 by the ring bolt system. Finally, the sealing support piece 400 is pressed in for compression and sealing.

[0047] When the jacking pipe 700 is inserted into the opening 601 for jacking operation, the inner ring diameter of the first rubber sealing plate 200 is smaller than the outer diameter of the jacking pipe 700, causing the first rubber sealing plate 200 to undergo elastic deformation under the contact of the jacking pipe 700. This presses the side of the water-blocking head 210 at the end of the first rubber sealing plate 200 against the outer wall of the jacking pipe 700 for surface sealing. The end face of the water-blocking head 210 at the end of the second rubber sealing plate 300 is pressed against the outer wall of the jacking pipe 700, serving as a second surface sealing structure and providing continuous sealing when the first sealing plate wears. The sealing support 400 abuts against the outer wall of the jacking pipe 700, forming a third seal and providing support, lubrication, and buffering for the jacking pipe 700, making the jacking process of the jacking pipe 700 more stable and reducing the vibration transmitted to the mounting component 100.

[0048] In summary, this application significantly increases the contact area of ​​the sealing position by elastically pressing the first rubber sealing plate 200 and adding the water-blocking head 210, thereby improving the sealing effect of the opening 601 and enhancing the reliability and service life of the water-stopping device.

[0049] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A water-stopping device for a pipe jacking construction opening, comprising an installation component (100) and a first rubber sealing plate (200), wherein both the installation component (100) and the first rubber sealing plate (200) are arranged in a ring shape, characterized in that: The first rubber sealing plate (200) is set at the opening (601) and is coaxial with the opening (601); the mounting component (100) is fixedly set on the well wall (600) around the opening (601), and the mounting component (100) is provided with a first mounting groove (101), which is used to fix the first rubber sealing plate (200); the inner ring diameter of the first rubber sealing plate (200) is smaller than the outer circumference diameter of the jacking pipe (700), and a water baffle (210) is provided on the inner ring side of the first rubber sealing plate (200), which is used to abut against the outer circumference of the jacking pipe (700), and the cross section of the water baffle (210) is a regular polygon.

2. The water-stopping device for pipe jacking construction openings according to claim 1, characterized in that: The cross-section of the water-blocking head (210) is a regular hexagon.

3. A water-stopping device for pipe jacking construction openings according to claim 2, characterized in that: A second rubber sealing plate (300) is also provided. A second mounting groove (102) is provided on the side of the first mounting groove (101) away from the opening (601). The second rubber sealing plate (300) is disposed in the second mounting groove (102). The inner ring diameter of the second rubber sealing plate (300) is the same as the outer circumference diameter of the jacking pipe (700). A water baffle (210) is provided on the inner ring side of the second rubber sealing plate (300). The water baffle (210) is used to abut against the outer circumference of the jacking pipe (700).

4. A water-stopping device for pipe jacking construction openings according to claim 3, characterized in that: The mounting component (100) is provided with a first support portion (110) and a second support portion (120). The first support portion (110) is disposed between the first mounting groove (101) and the second mounting groove (102), and the first support portion (110) extends toward the center of the mounting component (100) to support the first rubber sealing plate (200). The second support portion (120) is disposed on the side of the second mounting groove (102) away from the first mounting groove (101), and the second support portion (120) extends toward the center of the mounting component (100) to support the second rubber sealing plate (300).

5. A water-stopping device for pipe jacking construction openings according to claim 4, characterized in that: It also includes a sealing support (400), and the mounting part (100) is also provided with a limiting part (130). The limiting part (130) is arranged in a ring shape. The limiting part (130) is arranged on the side of the second support part (120) away from the opening (601) and extends towards the side away from the opening (601). The sealing support (400) is arranged in a ring shape. The outer peripheral surface of the sealing support (400) abuts against the inner peripheral surface of the limiting part (130), and the inner peripheral surface of the sealing support (400) abuts against the outer peripheral surface of the jacking pipe (700).

6. A water-stopping device for pipe jacking construction openings according to claim 5, characterized in that: The inner circumferential surface of the limiting part (130) is provided with an abutment part (140), the abutment part (140) extends from the inner circumferential surface of the limiting part (130) to the center position, and the end of the sealing support (400) near the opening (601) abuts against the abutment part (140).

7. A water-stopping device for pipe jacking construction openings according to any one of claims 1-6, characterized in that: A through-wall sleeve (500) is also provided. The through-wall sleeve (500) has an L-shaped cross section. One end of the through-wall sleeve (500) passes through the opening (601) and abuts against the inner wall of the opening (601). The other end is fixedly set between the well wall (600) outside the opening (601) and the mounting component (100).

8. A water-stopping device for pipe jacking construction openings according to any one of claims 1-6, characterized in that: The mounting component (100) is also provided with a rust-proof coating.

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