Seabed vertical jacking riser joint water stop frame and construction method

Abstract

The invention discloses a seabed vertical jacking riser section water stop frame and a construction method, the seabed vertical jacking riser section water stop frame comprises a water stop frame body arranged below a jacking opening and a water stop layer arranged on the inner side of the water stop frame body, and a plurality of grouting holes are formed in the periphery of the water stop frame body; the mud jacking hole is communicated with the inner side and the outer side of the water stop frame body, and a mud jacking valve is arranged at the mud jacking hole; when the jacking pipe joint penetrates through the jacking opening, the inner side of the water stopping layer abuts against the outer side of the jacking pipe joint, a gap between the outer side of the jacking pipe joint and the inner side of the water stopping frame body is blocked, and when water leaks in the gap between the outer side of the jacking pipe joint and the inner side of the water stopping frame body, the grouting valve is opened, and grouting is conducted on the inner side of the water stopping frame body, so that the water stopping purpose is achieved. The vertical jacking construction method has the effect of improving the water leakage problem in the vertical jacking construction process.

Description

Technical Field

[0001] The present application relates to the field of submarine pipeline engineering, and in particular to a submarine vertical jacking riser pipe joint water-stop frame and a construction method. Background Art

[0002] Submarine water intake tunnels are one of the important infrastructures in special geographical areas such as coastal areas and islands. Traditional water intake methods such as ground drilling and pumping stations have high construction and maintenance costs and are difficult to meet the water resource needs of these areas. With the advancement of science and technology, submarine shield water intake tunnels have gradually gained attention as a new water intake method. This technology can not only improve water intake efficiency, but also reduce the impact on the environment, and has high safety and environmental protection. Especially in large-scale municipal projects and water supply and drainage projects, submarine shield water intake tunnels are increasingly widely used and have become an effective way to solve water resource problems in coastal areas.

[0003] In the construction process of submarine water intake tunnels, vertical jacking technology is widely used. This technology uses a hydraulic device to push out the jacking cover at the jacking port of the pipe segment structure, and then gradually jacks it up to the designed height, thereby achieving connectivity between the inside and outside of the tunnel. In order to prevent water and mud leakage from the gap between the pipe segment and the jacking port of the pipe segment structure during the jacking process, the existing conventional means is usually to set a water stop strip on the inside of the jacking port. When the jacking pipe segment passes through the jacking port, the water stop strip seals against the outer wall of the jacking pipe segment, thereby blocking the gap between the inner side of the jacking port and the outer wall of the jacking pipe segment to achieve the water stop function.

[0004] However, the water stop strips in the prior art have obvious defects in actual use. Specifically, during the vertical jacking construction process, as the pipe segment is continuously jacked up, the water stop strips are prone to wear or even breakage, resulting in serious water leakage. This problem seriously affects the safety and reliability of the construction, so further improvements are needed to enhance the water stop effect. Summary of the invention

[0005] In order to improve the water leakage problem during the vertical jacking construction process, the present application provides a seabed vertical jacking riser pipe joint water-stop frame and a construction method.

[0006] The present application provides a subsea vertical jacking riser pipe joint water stop frame and construction method using the following technical solutions: A submarine vertical jacking riser pipe joint water-stop frame, comprising a water-stop frame body arranged below a jacking port and a water-stop layer arranged inside the water-stop frame body, the water-stop frame body having a plurality of grouting holes around its circumference, the grouting holes being connected to the inner and outer sides of the water-stop frame body, and a grouting valve being arranged at the grouting holes; when the jacking pipe joint passes through the jacking port, the inner side of the water-stop layer presses against the outer side of the jacking pipe joint, and blocks the gap between the outer side of the jacking pipe joint and the inner side of the water-stop frame body; when water leaks from the gap between the outer side of the jacking pipe joint and the inner side of the water-stop frame body, the grouting valve is opened and grouting is applied to the inner side of the water-stop frame body to achieve the purpose of water stopping.

[0007] By adopting the above technical solution, the seabed vertical jacking riser pipe joint waterstop frame can effectively prevent water and mud leakage at the jacking port during the jacking process. Specifically, the inner side of the waterstop layer is pressed against the outer side of the jacking pipe joint, ensuring a close fit between the jacking pipe joint and the inner side of the waterstop frame body, effectively blocking the gap between the two. When an unexpected water leakage occurs, the purpose of water stopping can be quickly achieved by opening the grouting valve and injecting waterstop slurry into the inner side of the waterstop frame body; this emergency waterstop measure is not only simple and quick to operate, but also can effectively prevent safety hazards and construction delays caused by long-term water leakage, and improve the safety and reliability of the overall construction process; at the same time, the grouting method can flexibly respond to leakage points of different positions and sizes, ensuring a more thorough and lasting waterstop effect.

[0008] Preferably, the water-stop layer comprises a rubber ring and a plurality of oil-immersed packings, and the rubber ring and the plurality of oil-immersed packings are both arranged around the inner side of the water-stop frame body and distributed from top to bottom.

[0009] By adopting the above technical solution, the combined use of rubber rings and several oil-immersed packings can effectively enhance the overall sealing performance of the water-stop layer. As the main initial sealing material, the rubber ring can first form a preliminary seal when the jacking pipe section passes through the jacking port to prevent a large amount of water and mud from entering the gap. The oil-immersed packing further enhances the sealing effect, especially when used for a long time or encountering high pressure. The oil-immersed packing can better adapt to the changes in the outer wall of the jacking pipe section and ensure a long-term and reliable sealing effect; at the same time, this multi-level design also improves the reliability of the system. Even if one layer fails, the other layers can continue to play a water-stopping role, thereby significantly reducing the risk of water leakage. .

[0010] Preferably, an adjusting pressure plate is provided at the bottom of the water stop frame body, and the inner side of the adjusting pressure plate is protruded on the inner side of the water stop frame body. The protruding part of the adjusting pressure plate is threadedly connected with an adjusting bolt arranged vertically upward. The adjusting bolt is located below a number of oil-immersed packings, and the adjusting bolt is used to tighten the oil-immersed packing upwards.

[0011] By adopting the above technical solution, the design of the adjusting plate and the adjusting bolt enables the oil-immersed packing to maintain good sealing performance during the jacking process. Specifically, the adjusting bolt can adjust the compression of the oil-immersed packing to ensure that it always fits tightly against the outer wall of the jacking pipe segment, effectively preventing water leakage caused by wear during the jacking process. At the same time, the protruding part design of the adjusting plate increases the stability of the oil-immersed packing and further improves the water-stopping effect.

[0012] Preferably, a packing strip is provided at the bottom of the oil-immersed packing, and the adjusting bolt presses the oil-immersed packing tightly by pushing the packing strip upward.

[0013] By adopting the above technical solution, a packing strip is provided at the bottom of the oil-immersed packing, and the adjusting bolt pushes the packing strip upward to tighten the oil-immersed packing. This design can effectively enhance the sealing performance of the oil-immersed packing, prevent leakage problems caused by deformation or wear of the oil-immersed packing itself, and further improve the overall reliability and service life of the water stop frame. At the same time, by adjusting the pressure control of the bolt on the packing strip, the tightness of the oil-immersed packing can be flexibly adjusted during the construction process to ensure a good sealing effect under different working conditions.

[0014] Preferably, a stopper is provided inside the water stop frame body, and the stopper is located between the rubber ring and the oil-immersed packing to separate the rubber ring and the oil-immersed packing.

[0015] By adopting the above technical solution, the block separates the rubber ring and the oil-immersed packing, effectively preventing the two from affecting each other during use, and ensuring their respective water-stopping performance. Specifically, the block can avoid wear or deformation caused by friction between the rubber ring and the oil-immersed packing, thereby extending the overall service life of the water-stop layer and improving its sealing reliability. At the same time, the existence of the block enables the rubber ring and the oil-immersed packing to better maintain their respective positions and shapes when subjected to force, further enhancing the water-stopping effect.

[0016] A construction method for a seabed vertical jacking riser pipe joint water stop frame comprises the following steps: S1: Installation of water stop frame: a water stop layer is arranged inside the water stop frame body, and grouting holes are opened around the water stop frame body, the water stop frame body is installed below the jacking port of the pipe segment structure, and then the top of the jacking pipe section is connected to the bottom of the jacking cover at the jacking port; S2: Vertical jacking construction: The jacking pipe section pushes the jacking pipe cover upward out of the jacking port, and the jacking pipe section passes through the jacking port. The inner side of the water stop layer inside the water stop frame body is pressed against the outer side of the jacking pipe section, and the gap between the outer side of the jacking pipe section and the inner side of the water stop frame body is blocked; S3: Emergency water-stopping construction: When water leakage occurs in the gap between the outer side of the jacking pipe section and the inner side of the water-stop frame body, the purpose of water-stopping is achieved by opening the grouting valve and injecting water-stop slurry into the inner side of the water-stop frame body.

[0017] By adopting the above technical solution, the water-stop layer in the water-stop frame body can fit tightly to the outside of the jacking pipe section when the jacking pipe section passes through the jacking port, effectively blocking the gap between the two and preventing water leakage and mud leakage. At the same time, the design of the grouting hole and the grouting valve allows the water-stop slurry to be quickly injected when water leakage occurs, further enhancing the water-stop effect and ensuring the safety and reliability of the construction process. In addition, the water-stop layer is composed of a rubber ring and an oil-immersed packing, and multiple sealing measures improve the overall water-stop performance. The setting of the adjusting bolt and the packing strip can adjust the pressure of the oil-immersed packing as needed to ensure that it is always in the best working state and avoid leakage problems caused by wear. The use of the block separates the water-stop layers of different materials to ensure that their respective functions are not interfered with. In summary, this technical solution significantly improves the reliability and effectiveness of the water-stopping of the seabed vertical jacking riser pipe section.

[0018] Preferably, in S1, the top of the jacking pipe section and the bottom of the jacking pipe cover are connected by a flange, a wooden block is arranged in the groove outside the flange, the outer side of the wooden block is flush with the outer wall of the jacking pipe section, and the outer side of the wooden block is tightly pressed against the inner side of the water stop layer.

[0019] By adopting the above technical solution, the flange connection between the top of the jacking pipe section and the bottom of the jacking cover enhances the overall stability and sealing performance of the structure. The wooden pads set in the groove outside the flange keep the outer wall of the jacking pipe section flat, which is conducive to reducing the wear of the components on the water stop layer during the vertical jacking process.

[0020] Preferably, in the emergency water-stopping construction of S3, the water-stopping slurry is polyurethane.

[0021] By adopting the above technical solution, the use of polyurethane as a water-stop slurry can effectively improve the water-stop performance. Polyurethane has good adhesion and elasticity, and can quickly solidify in a short time to form a dense water-stop layer to prevent water penetration. At the same time, polyurethane materials also have excellent chemical corrosion resistance and aging resistance, ensuring long-term stable operation in complex marine environments and extending the service life of the water-stop frame.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting a water-stop layer on the inner side of the water-stop frame and using a multi-layer sealing structure of rubber rings and oil-immersed packing, the water-stop performance during the jacking process is effectively improved, and the risk of water leakage caused by wear or breakage of the water-stop strip is reduced; 2. The design of the grouting holes and grouting valves allows the leakage to be quickly blocked by injecting water-stop slurry into the inner side of the water-stop frame body when water leaks from gaps during the jacking process, thus enhancing the emergency handling capability and ensuring construction safety; 3. The combined design of the adjusting pressure plate and the adjusting bolt can dynamically adjust the pressure of the oil-immersed packing so that it always fits closely to the outer wall of the jacking pipe section, further improving the reliability and stability of long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a plan cross-sectional view of a water-stop frame in a seabed vertical jacking riser pipe joint water-stop frame according to an embodiment of the present application.

[0024] Figure 2 yes Figure 1 Schematic diagram of the connection between the water stop frame body and the top pipe cover at the AA longitudinal section position.

[0025] Explanation of the accompanying reference numerals: 1. Water stop frame body; 2. Segment structure; 3. Pipe jacking cover; 4. Lifting port; 5. Flange; 6. Wooden pad; 7. Lifting pipe joint; 8. Rubber ring; 9. Stop block; 10. Oil-immersed packing; 11. Adjusting pressure plate; 12. Adjusting bolt; 13. Packing strip; 14. Grouting valve; 15. Grouting hole. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-2 This application is described in further detail.

[0027] The present application embodiment discloses a seabed vertical jacking riser pipe joint water stop frame, referring to Figure 1 and Figure 2 , including a water stop frame body 1 installed and fixed below the jacking port 4 of the pipe segment structure 2 and a water stop layer surrounding and covering the inner side of the water stop frame body 1. A plurality of grouting holes 15 are opened around the water stop frame body 1. The grouting holes 15 are connected to the inner and outer sides of the water stop frame body 1. A grouting valve 14 is installed at each grouting hole 15. When the jacking pipe segment 7 passes through the jacking port 4, the inner side of the water stop layer presses against the outer side of the jacking pipe segment 7, and the gap between the outer side of the jacking pipe segment 7 and the inner side of the water stop frame body 1 is blocked. When water leaks from the gap between the outer side of the jacking pipe segment 7 and the inner side of the water stop frame body 1, the grouting valve 14 is opened and the water stop slurry is pressed into the inner side of the water stop frame body 1 to achieve the purpose of water stopping, thereby improving the water stopping effect and reducing the risk of leakage.

[0028] Specifically, the water stop frame body 1 is a rectangular metal frame, and the metal frame can be made of high-strength stainless steel or aluminum alloy to ensure its corrosion resistance and strength in seawater. When installing the water stop frame body 1, the top surface of the water stop frame body 1 is welded and fixed to the lower edge of the top lifting port 4 of the pipe segment structure 2, and the weld height is 10mm. The weld is straight with the inner wall of the water stop frame body 1, and is watertight, and is alternately welded to prevent deformation. In addition, the outer side of the water stop frame body 1 is welded with reinforced plates all around, and is welded firmly to the pipe segment structure 2.

[0029] The water stop layer includes a rubber ring 8 and a plurality of oil-immersed packings 10. The rubber ring 8 is arranged around the inner side of the water stop frame body 1 and is located at the top, playing a role of preliminary sealing. The oil-immersed packings 10 are distributed below the rubber ring 8, and the number can be adjusted according to actual conditions, for example, it can be set to three or five. The oil-immersed packings 10 are made of cotton yarn soaked in grease, have good lubricity and sealing, and can effectively prevent water from penetrating during the jacking process.

[0030] In this embodiment, an adjusting plate 11 is provided at the bottom of the water stop frame body 1, and the inner side of the adjusting plate 11 is protruded and provided on the inner side of the water stop frame body 1, and an adjusting bolt 12 vertically arranged upward is threadedly connected to the protruding part of the adjusting plate 11. The adjusting bolt 12 is located below a plurality of oil-immersed packings 10 and is used to press the oil-immersed packings 10 upward. In this way, the pressure can be dynamically adjusted as needed during the jacking process to ensure that the oil-immersed packings 10 are always in the best sealing state.

[0031] In the present embodiment, a packing strip 13 is provided at the bottom of the oil-immersed packing 10, and the adjusting bolt 12 presses the packing strip 13 upward to tighten the oil-immersed packing 10. The packing strip 13 is generally made of metal material, and the surface is treated with anti-corrosion to extend the service life. In addition, plastic or composite materials can also be considered to reduce weight and cost.

[0032] An annular stopper 9 is arranged around the inner side of the water stop frame body 1. The stopper 9 is located between the rubber ring 8 and the oil-immersed packing 10 to separate the rubber ring 8 and the oil-immersed packing 10, effectively preventing the two from affecting each other during use and ensuring their respective water stop performance. The stopper 9 can be made of hard plastic or metal material, and can be round or square in shape, with a thickness of about 10 mm, to ensure sufficient rigidity and stability.

[0033] The implementation principle of this embodiment is: The seabed vertical jacking riser pipe joint water-stop frame significantly improves the water-stop effect through multi-level water-stop measures. First, the rubber ring 8, as the first line of defense, can quickly form a preliminary seal; secondly, the oil-immersed packing 10, as the second line of defense, can continuously provide sealing force during the jacking process; then, by adjusting the bolt 12 and the dynamic adjustment of the packing strip 13, it is ensured that the sealing effect is maintained stably during the entire jacking process. Such a design not only effectively solves the problem of easy wear and breakage of traditional water-stop strips, but also, when unexpected water leakage occurs, the purpose of water stopping can be quickly achieved by opening the grouting valve 14 and injecting water-stop slurry into the inner side of the water-stop frame body 1; this emergency water-stop measure is not only simple and quick to operate, but also can effectively prevent safety hazards and construction delays caused by long-term water leakage, and improve the safety and reliability of the overall construction process; at the same time, the grouting method can flexibly deal with leakage points of different positions and sizes, ensuring that the water-stop effect is more thorough and lasting, greatly reducing the risk of leakage, and improving the reliability and safety of the entire system.

[0034] The construction method of the seabed vertical jacking riser pipe joint water stop frame provided in the embodiment of the present application comprises the following steps: S1: Installation of water stop frame. First, install and fix the water stop layer on the inner side of the water stop frame body 1, and then install the water stop frame body 1 below the jacking port 4 of the pipe segment structure 2 to ensure that the horizontality and verticality of the water stop frame body 1 meet the design requirements. Finally, connect the top of the jacking pipe section 7 to the bottom of the jacking pipe cover 3 at the jacking port 4. The connection method can be flange 5 connection. Use wooden pads 6 and quick-hardening waterproof cement powder to level the groove on the outside of the flange 5. The outside of the wooden pads 6 is flush with the outer wall of the jacking pipe section 7. The outside of the wooden pads 6 is pressed against the inside of the water stop layer. The outer wall and joints of the jacking pipe section 7 are also painted. The wooden pads 6, quick-hardening waterproof cement, paint and other fillers make the surface of the entire jacking structure smooth and flat, reducing the wear of the water stop layer during the jacking process.

[0035] S2: Vertical jacking construction. Before starting the jacking construction, check whether all parts are installed in place. After confirming that they are correct, start the hydraulic device to slowly raise the jacking pipe section 7 until the jacking pipe cover 3 is completely separated from the jacking port 4. In this process, the jacking pipe section 7 passes through the jacking port 4, and the inner side of the water stop layer on the inner side of the water stop frame body 1 is pressed against the outer side of the jacking pipe section 7 to form a tight sealing contact. At this time, observe whether there is water leakage. If necessary, adjust the jacking speed appropriately or recalibrate the position of the water stop layer.

[0036] S3: Emergency water stopping construction When water leaks from the gap between the outer side of the jacking pipe section 7 and the inner side of the water stop frame body 1, the jacking device should be closed immediately, the grouting valve 14 should be opened, and the water stop slurry should be injected. The commonly used water stop slurry is polyurethane, which has good expansion properties and a short curing time. It can quickly fill the gap and solidify into a solid, thereby achieving the purpose of water stop. During the injection process, ensure that the grouting valve 14 is unobstructed to avoid blockage. After the injection is completed, close the grouting valve 14, check the water stop effect again, and continue the jacking construction after confirming that there is no leakage.

[0037] The implementation principle of this embodiment is: Through detailed construction steps and technical points, this embodiment ensures that every link in the installation and jacking process of the water stop frame is strictly controlled. First, through the reasonable setting of the water stop layer and the arrangement of the grouting holes 15, a good foundation is laid; second, strict installation and commissioning procedures ensure the precise matching of various components; finally, effective emergency water stop measures ensure timely remediation in unexpected situations. This series of optimized designs not only improves construction efficiency, but also greatly reduces construction risks, ensuring the quality and safety of the entire project.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A seabed vertical jacking riser pipe joint water stop frame, characterized in that: The invention comprises a water stop frame body (1) arranged below a jacking opening (4) and a water stop layer arranged inside the water stop frame body (1); the water stop frame body (1) is provided with a plurality of grouting holes (15) around its periphery; the grouting holes (15) are connected to the inside and outside of the water stop frame body (1); and a grouting valve (14) is arranged at the grouting hole (15); when the jacking pipe section (7) passes through the jacking opening (4), the inner side of the water stop layer is pressed against the outer side of the jacking pipe section (7) and the gap between the outer side of the jacking pipe section (7) and the inner side of the water stop frame body (1) is blocked; when water leaks from the gap between the outer side of the jacking pipe section (7) and the inner side of the water stop frame body (1), the grouting valve (14) is opened and water stop slurry is pressed into the inner side of the water stop frame body (1) to achieve the purpose of water stopping.

2. The seabed vertical jacking riser pipe joint water-stop frame according to claim 1, characterized in that: The water-stop layer comprises a rubber ring (8) and a plurality of oil-immersed packings (10). The rubber ring (8) and the plurality of oil-immersed packings (10) are both arranged around the inner side of the water-stop frame body (1) and distributed from top to bottom.

3. The seabed vertical jacking riser pipe joint water-stop frame according to claim 2 is characterized by: An adjusting pressure plate (11) is arranged at the bottom of the water stop frame body (1), the inner side of the adjusting pressure plate (11) is protrudingly arranged on the inner side of the water stop frame body (1), and an adjusting bolt (12) arranged vertically upward is threadedly connected at the protruding part of the adjusting pressure plate (11), and the adjusting bolt (12) is located below the plurality of oil-immersed packings (10), and the adjusting bolt (12) is used to tighten the oil-immersed packings (10) upward.

4. The seabed vertical jacking riser pipe joint water-stop frame according to claim 3 is characterized by: A packing strip (13) is provided at the bottom of the oil-immersed packing (10), and the adjusting bolt (12) presses the packing strip (13) upward to tighten the oil-immersed packing (10).

5. The seabed vertical jacking riser pipe joint water-stop frame according to claim 4 is characterized in that: A stopper (9) is provided inside the water stop frame body (1), and the stopper (9) is located between the rubber ring (8) and the oil-immersed packing (10) so as to separate the rubber ring (8) and the oil-immersed packing (10).

6. A method for constructing a seabed vertical jacking riser pipe joint water stop frame according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Installation of water stop frame: a water stop layer is arranged inside the water stop frame body, and grouting holes are opened around the water stop frame body, the water stop frame body is installed below the jacking port of the pipe segment structure, and then the top of the jacking pipe section is connected to the bottom of the jacking cover at the jacking port; S2: Vertical jacking construction: The jacking pipe section pushes the jacking pipe cover upward out of the jacking port, and the jacking pipe section passes through the jacking port. The inner side of the water stop layer inside the water stop frame body is pressed against the outer side of the jacking pipe section, and the gap between the outer side of the jacking pipe section and the inner side of the water stop frame body is blocked; S3: Emergency water-stopping construction: When water leakage occurs in the gap between the outer side of the jacking pipe section and the inner side of the water-stop frame body, the purpose of water-stopping is achieved by opening the grouting valve and injecting water-stop slurry into the inner side of the water-stop frame body.

7. The construction method of the seabed vertical jacking riser pipe joint water stop frame according to claim 1, characterized in that: In S1, the top of the jacking pipe section (7) is connected to the bottom of the jacking pipe cover (3) via a flange (5), a wooden pad (6) is arranged at the groove outside the flange (5), the outer side of the wooden pad (6) is flush with the outer side wall of the jacking pipe section (7), and the outer side of the wooden pad (6) is tightly pressed against the inner side of the water stop layer.

8. The construction method of the seabed vertical jacking riser pipe joint water stop frame according to claim 1, characterized in that: In the emergency water-stopping construction of S3, the water-stopping slurry is polyurethane.

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