Underwater box culvert water stopping system and underwater box culvert butt joint method
By using a combination of a first and a second waterstop in an underwater box culvert, along with base support, the problem of reduced sealing performance at the joints of the underwater box culvert was solved, thus improving sealing performance and extending the service life of the waterstop.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGZHOU SALVAGE BUREAU
- Filing Date
- 2026-03-26
- Publication Date
- 2026-05-08
AI Technical Summary
The sealing performance of underwater box culvert joints is susceptible to erosion by silt and marine organisms, and is also affected by the marine environment and geological movements, leading to a shortened service life of the waterstop and failure of its sealing performance.
The system employs a combination of a first waterstop and a second waterstop. The first waterstop isolates the internal and external spaces of the pipe section, while the second waterstop seals the joint between the pipe sections. Combined with the base support structure, this prevents misalignment and displacement, and enhances the sealing performance.
It extends the service life of the waterstop, improves the sealing performance of the underwater box culvert, prevents seawater, silt and marine organisms from entering the joint, and ensures the long-term sealing effect of the underwater box culvert.
Smart Images
Figure CN121992824A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of underwater box culvert installation technology, and in particular to an underwater box culvert water-stopping system and an underwater box culvert docking method. Background Technology
[0002] The circulating water system in nuclear and thermal power plants is a critical component ensuring the safe operation of the units. Underwater box culverts, used for water intake and drainage, are an important part of this system, playing a vital role in transporting large quantities of cooling water and warm water. With the rapid development of the national power industry, especially the concentrated construction of coastal nuclear power projects, underwater box culverts have been widely used due to their advantages such as high construction efficiency and controllable quality. During the construction of underwater box culverts, the problem of seepage prevention at the culvert joints is a key technical focus requiring long-term research.
[0003] In related technologies, the main method for preventing seepage at the joints of box culverts is to install GINA or Q-type waterstops between adjacent pipe sections to seal the joint. However, during long-term operation of underwater box culverts, a large amount of silt and marine organisms accumulate at the joints, leading to a shortened service life or sealing failure of the waterstop. Furthermore, the marine environment, foundation settlement, and geological movements can cause misalignment between adjacent pipe sections, resulting in deformation or displacement of the waterstop and reducing its sealing performance. Summary of the Invention
[0004] The purpose of this invention is to provide an underwater box culvert water-stopping system and an underwater box culvert docking method, which has good sealing performance and long service life.
[0005] To achieve this objective, the present invention adopts the following technical solution: In a first aspect, an underwater box culvert water-stopping system is provided, comprising a first water-stop strip, a second water-stop strip, and a base. The mating ends of two pipe sections are both disposed on the base. The first water-stop strip is clamped between the mating ends of the two pipe sections. The first water-stop strip is used to isolate the internal space of the pipe section from the external space. The second water-stop strip is disposed on the outer surface of the pipe section and covers the mating seam on the top and side surfaces of the two pipe sections. The two ends of the second water-stop strip along its width direction are respectively connected to the two pipe sections. The two ends of the second water-stop strip along its length direction extend to the base and are connected to the base.
[0006] As a preferred embodiment of the underwater box culvert water-stopping system, the base includes a concrete base plate and an elastic pad, the elastic pad being installed on the top surface of the concrete base plate and abutting against the bottom surface of the pipe section.
[0007] As a preferred embodiment of the underwater box culvert water-stopping system, the thickness of the concrete base plate is 400-600mm; and / or, along the width direction of the pipe section, the distance between the end face of the concrete base plate and the pipe section is 1000-2000mm.
[0008] As a preferred embodiment of the underwater culvert water-stopping system, the second water-stop is an Ω-shaped water-stop. Along the length of the second water-stop, the second water-stop includes a hollow section and a solid section connected to both ends of the hollow section. The hollow section covers the butt joint on the top and side surfaces of the two pipe sections, and the solid section is used to connect with the base.
[0009] As a preferred embodiment of the underwater culvert water-stopping system, it also includes fasteners, which include a first pressure plate, a second pressure plate, and bolts. The first pressure plate is pressed flat against the side of the hollow section away from the top surface of the pipe section, and the first pressure plate, the hollow section, and the pipe section are fixed by the bolts. The second pressure plate is pressed flat against the side of the hollow section away from the side of the pipe section, and the second pressure plate, the hollow section, and the pipe section are fixed by the bolts. The first pressure plate located at the corner of the pipe section abuts against the second pressure plate and is fixed by the bolts.
[0010] As a preferred embodiment of the underwater box culvert water-stopping system, it also includes fasteners, which include a third pressure plate, an elastic pressure block, a channel steel assembly, and a pre-embedded screw. The elastic pressure block, the third pressure plate, and the channel steel assembly are pressed flat on the side of the solid section away from the base from bottom to top. The channel steel assembly is fixed to the base by the pre-embedded screw. The elastic pressure block is provided with a receiving groove for accommodating the protrusions on the solid section.
[0011] As a preferred embodiment of the underwater culvert water-stopping system, it also includes end plates, with the end plates provided at the joint ends of the two pipe sections. The first water-stop strip is clamped between the two end plates. The end plates are metal plates, and sacrificial anodes are electrically connected to the end plates.
[0012] As a preferred embodiment of the underwater culvert water-stopping system, it also includes a protective cover, which is installed on the pipe section and the base, and the protective cover and the pipe section, as well as the protective cover and the base, form a receiving cavity for accommodating the second water-stopping strip.
[0013] As a preferred embodiment of the underwater box culvert water-stopping system, it also includes a tie rod assembly, the two ends of which are respectively connected to the two pipe sections, and the tie rod assembly is used to tighten the two pipe sections.
[0014] Secondly, a method for connecting underwater box culverts is also provided, which is used to install the underwater box culvert water-stopping system onto two interconnecting pipe sections, specifically including the following steps: Step S1: Provide a base and two pipe sections, one of which is an installed pipe section that has been installed on the underwater foundation, and the other is a pipe section to be installed. Before installing the installed pipe section, the base is installed on the underwater foundation in advance, and the docking end of the installed pipe section is placed on the base. Step S2: Install the first waterstop to the docking end of the pipe section to be installed, use hoisting equipment to hoist the pipe section to be installed to the pre-dock position, and make a certain distance between the pipe section to be installed and the installed pipe section; Step S3: Install both ends of the pulling device onto the two pipe sections respectively, and use the pulling device to drive the pipe section to be installed to abut against the installed pipe section; after the two pipe sections are connected, install the tie rod assembly on the two pipe sections and remove the pulling device; Step S4: Install a second waterstop at the joint of the two pipe sections. The second waterstop covers the joint of the top and side surfaces of the two pipe sections. The two ends of the second waterstop in the length direction are connected to the base. Step S5: Install the protective cover on the pipe section and the base, and make the protective cover cover the periphery of the second waterstop.
[0015] The advantages of this invention compared to the prior art are: The underwater box culvert water-stopping system and underwater box culvert docking method of the present invention isolate the internal and external spaces of the two pipe sections by setting a first water-stop strip between them. A second water-stop strip is installed on the outer surface of the pipe sections to seal the docking joints on the top and two sides of the underwater box culvert, preventing external seawater, silt, or marine organisms from entering the docking joints. This also prevents the first water-stop strip from contacting external seawater, silt, or marine organisms, thus extending its service life. The first and second water-stop strips together form a sealing structure between adjacent pipe sections, further improving the sealing performance of the entire underwater box culvert water-stopping system. Furthermore, a base is provided to support the docking ends of the adjacent pipe sections. When the underwater foundation deforms, the docking ends of the two pipe sections can be relatively fixed, preventing relative displacement and thus preventing deformation or displacement of the first water-stop strip due to misalignment of the two pipe sections, thereby ensuring the sealing performance of the entire underwater box culvert water-stopping system. Attached Figure Description
[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0017] Figure 1 This is a schematic diagram of the underwater box culvert water-stopping system according to an embodiment of the present invention.
[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle.
[0019] Figure 3 for Figure 1 Enlarged view of point B in the middle.
[0020] Figure 4 This is a schematic diagram of the installation of the first and second waterstops according to an embodiment of the present invention.
[0021] Figure 5 This is a schematic diagram of the installation of the second waterstop and the base according to an embodiment of the present invention.
[0022] Figure 6 This is a schematic diagram of the first state of underwater box culvert docking construction according to an embodiment of the present invention.
[0023] Figure 7 This is a schematic diagram of the second state of underwater box culvert docking construction according to an embodiment of the present invention.
[0024] Figure 8 This is a schematic diagram of the third state of underwater box culvert docking construction according to an embodiment of the present invention.
[0025] Figure 9 This is a schematic diagram of the fourth state of underwater box culvert docking construction according to an embodiment of the present invention.
[0026] Figure 10 This is a schematic diagram of the fifth state of underwater box culvert docking construction according to an embodiment of the present invention.
[0027] In the picture: 1. First waterstop; 11. Sealing part; 12. Mounting part; 2. Second waterstop; 21. Straight section; 22. Curved section; 23. Hollow section; 24. Solid section; 3. Base; 31. Concrete base plate; 32. Elastic pad; 4. End plate; 5. Protective cover; 6. Sacrificial anode; 7. Tie rod assembly; 8. Pull-and-close device; 9. Fastener; 91. First pressure plate; 92. Second pressure plate; 93. Third pressure plate; 94. Elastic pressure block; 95. Bolt; 96. Channel steel assembly; 97. Embedded bolt; 100. Installed pipe section; 110. First mounting seat; 200. Pipe section to be installed; 210. Second mounting seat; 220. Partition plate. Detailed Implementation
[0028] The advantages and features of the present invention, as well as methods of implementing them, will become apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided merely to complete the disclosure of the invention and to enable those skilled in the art to fully understand the scope of the invention, which is defined only by the scope of the claims. The same reference numerals denote the same constituent elements throughout the specification.
[0029] The present invention will now be described in detail with reference to the accompanying drawings.
[0030] like Figures 1 to 4 As shown, this invention provides an underwater box culvert water-stopping system applied in underwater box culverts. The underwater box culvert comprises several concrete pipe sections, which are sequentially connected for water conveyance. After prefabrication in a land-based plant, the pipe sections are towed one by one to the installation location for sinking and installation. The underwater box culvert water-stopping system seals the joint area between adjacent pipe sections, isolating the interior of the pipe section from the exterior. During construction, one of the two adjacent pipe sections is pre-installed on the underwater foundation; this section is referred to as installed pipe section 100. The other section is prepared for sinking and will be connected to installed pipe section 100; this section is referred to as pipe section to be installed 200. The underwater box culvert water-stopping system is installed simultaneously when installed pipe section 100 and pipe section to be installed 200 are connected.
[0031] The underwater culvert water-stopping system includes a first waterstop 1, a second waterstop 2, and a base 3. The base 3 supports two adjacent pipe sections and is installed on the underwater foundation. The joint ends of both pipe sections are mounted on the base 3. The first waterstop 1 seals between the two adjacent pipe sections and is installed on the joint end of one of the pipe sections. When the two adjacent pipe sections are joined, the first waterstop 1 is clamped between the joint ends. The first waterstop 1 isolates the internal and external spaces of the pipe section to prevent leakage at the joint area. The second waterstop 2 is located on the outer surface of the pipe section, covering the joint on the top and sides of the two pipe sections. Along the width of the second waterstop 2, both ends are connected and fixed to the two pipe sections. Along the length of the second waterstop 2, both ends extend to the base 3 and are connected and fixed to the base 3.
[0032] Understandably, by installing a first waterstop 1 between two pipe sections, the internal and external spaces of the pipe section are isolated. By installing a second waterstop 2 on the outer surface of the pipe section, the joints on the top and two sides of the underwater culvert are sealed, preventing external seawater, silt, or marine life from entering the joints. This also prevents the first waterstop 1 from contacting external seawater, silt, or marine life, thus extending its service life. The first and second waterstops 1 together form a sealing structure between adjacent pipe sections, further improving the sealing performance of the entire underwater culvert waterstop system. Furthermore, by installing a base 3, the joint ends of adjacent pipe sections are supported. When the underwater foundation deforms, the joint ends of the two pipe sections can be relatively fixed, preventing relative displacement and thus preventing the first waterstop 1 from deforming or shifting due to misalignment between the two pipe sections, thereby ensuring the sealing performance of the entire underwater culvert waterstop system.
[0033] Specifically, the base 3 includes a concrete base plate 31 and an elastic pad 32. The elastic pad 32 is made of rubber and is installed on the top surface of the concrete base plate 31. The elastic pad 32 abuts against the bottom surface of the pipe section. By setting the elastic pad 32, the joint ends of the two pipe sections can fit tightly against the base 3, preventing seawater or marine organisms from entering the joint seam at the bottom of the underwater culvert. The second waterstop 2 covers the top surface of the underwater culvert and the two sides along the width direction (Y direction in the figure). The two ends of the second waterstop 2 along its length are respectively installed on the base 3. To ensure that there is sufficient space on the base 3 to install the second waterstop 2, the dimension of the base 3 in the width direction (Y direction in the figure) of the pipe section must be larger than the width dimension of the pipe section.
[0034] In an optional embodiment, the thickness of the concrete base plate 31 is set to 400–600 mm. The thickness of the concrete base plate 31 can be flexibly selected according to the weight of the pipe section to provide sufficient support for the joint ends of the two pipe sections. In this embodiment, the thickness of the concrete base plate 31 includes, but is not limited to, 400 mm, 450 mm, 500 mm, 550 mm, and 600 mm. Along the width direction of the pipe section, the distance between the end face of the concrete base plate 31 and the pipe section is 1000–2000 mm. To ensure the sealing performance of the second waterstop 2, sufficient contact surface is required between the second waterstop 2 and the base 3. Therefore, the base 3 needs to have sufficient dimensions to meet the installation requirements of the second waterstop 2. In this embodiment, the distance between the end face of the concrete base plate 31 and the pipe section includes, but is not limited to, 1000mm, 1100mm, 1200mm, 1300mm, 1400mm, 1500mm, 1600mm, 1700mm, 1800mm, 1900mm and 2000mm.
[0035] Specifically, the underwater culvert water-stopping system also includes end plates 4. End plates 4 are provided at the joint ends of both pipe sections. End plates 4 are metal plates with smooth surfaces. End plates 4 can be steel plates, stainless steel plates, etc. End plates 4 are set on the end faces of the joint ends of the pipe sections, clamping the first waterstop 1 between the two end plates 4. The pipe sections are cast from concrete, resulting in a relatively rough surface. By setting end plates 4, the contact area of the first waterstop 1 is made smoother, preventing damage to the first waterstop 1 from sharp structures on the pipe section, and ensuring a tight fit between the first waterstop 1 and the end plates 4. To ensure the installation quality of the second waterstop 2, the second waterstop 2 is also installed on the end plates 4. Correspondingly, the end plate 4 includes an integrally formed main body and an extension. The main body is set on the end face of the joint end of the pipe section, and the extension is set on the side of the pipe section to install and fix the second waterstop 2 onto the extension of the end plate 4. Simultaneously, the first waterstop 1 abuts against the main body of the end plate 4.
[0036] Specifically, the first waterstop 1 is a GINA waterstop, which includes a sealing portion 11 and mounting portions 12 disposed at opposite ends of the sealing portion 11. The sealing portion 11 is capable of elastic deformation and fits tightly against the end plates 4 on the two pipe sections. The mounting portion 12 is fitted onto the end plate 4 of one of the pipe sections and is fixed to the end plate 4 by a mounting member. The mounting member includes a pad for flattening the mounting portion 12 and bolts for fixing the pad. A chamber is formed inside the pipe section, and a partition 220 is disposed inside the chamber, dividing the chamber into two flow channels for water delivery. The first waterstop 1 is an integral structure, including an outer ring portion with a square ring structure and a long strip portion located inside the outer ring portion. The outer ring portion is installed around the periphery of the pipe section 200 to be installed, and the internal space of the entire pipe section is isolated from the external space by the outer ring portion. The elongated section is installed on the partition plate 220 of the pipe section 200 to be installed, and the two flow channels in the pipe section 200 to be installed are isolated by the elongated section. All pipe sections in the underwater box culvert have the same structure, and the specific structure of other pipe sections will not be described in detail here.
[0037] Specifically, refer to Figure 1 , Figure 2 and Figure 4As shown, the second waterstop 2 is an Ω-shaped waterstop. Along the width direction of the second waterstop 2, it includes a curved section 22 in the middle and straight sections 21 connecting both ends of the curved section 22. The curved section 22 is semi-circular and is used to cover the joint between the two pipe sections. The two straight sections 21 overlap with the end plates 4 on the two pipe sections, respectively. Along the length direction of the second waterstop 2, it includes a hollow section 23 in the middle and solid sections 24 connecting both ends of the hollow section 23. The hollow section 23 covers the joint on the top and sides of the two pipe sections, and the solid section 24 is used to connect with the base 3. It should be noted that the cross-sectional profile of the entire second waterstop 2 is the same; the difference lies in that the curved section 22 in the hollow section 23 is a hollow structure, while the curved section 22 in the solid section 24 is a solid structure. By setting the second waterstop 2 used for connection with the base 3 as a solid structure, gaps between the second waterstop 2 and the base 3 are avoided, thereby preventing seawater from entering the joint through the gap between the second waterstop 2 and the base 3.
[0038] The underwater culvert water-stopping system also includes fasteners 9, which are used to fix the second water-stop 2 to the pipe section and the base 3. Fasteners 9 include a first pressure plate 91, a second pressure plate 92, and bolts 95. The first pressure plate 91, the second pressure plate 92, and the bolts 95 are used to fix the hollow section 23. The first pressure plate 91 and the second pressure plate 92 have the same structure; both are rectangular flat plates. The first pressure plate 91 presses flat against the side of the hollow section 23 facing away from the top surface of the pipe section, i.e., the first pressure plate 91 is located at the top of the pipe section. Each straight section 21 is provided with a first pressure plate 91. For ease of installation, the first pressure plate 91 can be configured as a segmented structure, with a certain distance between adjacent segments of the first pressure plate 91. The first pressure plate 91, the hollow section 23 located on the top surface of the pipe section, and the pipe section are fixed together by bolts 95. The second pressure plate 92 presses flat against the side of the hollow section 23 facing away from the side of the pipe section, i.e., the second pressure plate 92 is located on both sides in the width direction of the pipe section. Each straight section 21 is equipped with a second pressure plate 92. For ease of installation, the second pressure plate 92 can be configured as a segmented structure, with a certain distance between adjacent second pressure plates 92. The second pressure plate 92, the hollow section 23 located on the side of the pipe section, and the pipe section are fixed together by bolts 95. To improve the sealing performance of the second waterstop 2 at the corner of the joint, the first pressure plate 91 located at the top end of the pipe section is vertically provided with an extension plate, the free end of the extension plate extending upward. The second pressure plate 92 located at the side end of the pipe section abuts against the extension plate on the first pressure plate 91 and is fixed together by bolts 95.
[0039] Specifically, refer to Figure 3 and Figure 5As shown, the fastener 9 also includes a third pressure plate 93, an elastic pressure block 94, a channel steel assembly 96, and a pre-embedded screw 97. The third pressure plate 93, elastic pressure block 94, channel steel assembly 96, and pre-embedded screw 97 are used to fix the solid section 24. The elastic pressure block 94, the third pressure plate 93, and the channel steel assembly 96 press flat against the side of the solid section 24 away from the base 3 from bottom to top. That is, the elastic pressure block 94 abuts against the solid section 24, the third pressure plate 93 presses against the top of the elastic pressure block 94, and the channel steel assembly 96 presses against the top of the third pressure plate 93. The channel steel assembly 96 is formed by splicing two channel steels back to back, with a gap between the two channel steels. The channel steel assembly 96 is fixed to the base 3 by the pre-embedded screw 97. The elastic pressure block 94 is elastic and is made of rubber material. The elastic pressure block 94 presses against the solid section 24. The elastic pressure block 94 is provided with a receiving groove for accommodating the protruding structures on the solid section 24 (such as the corresponding part of the curved section 22). The function of the elastic pressure block 94 is to flatten the third pressure plate 93 and press the entire solid section 24 firmly onto the base 3.
[0040] Specifically, refer to Figure 1 and Figure 8 As shown, the underwater box culvert waterstop system also includes a protective cover 5, a sacrificial anode 6, and a tie rod assembly 7. The protective cover 5 is installed on the pipe section and the base 3, forming a cavity between the protective cover 5 and the pipe section, and between the protective cover 5 and the base 3, to accommodate the second waterstop 2. The protective cover 5 is made of cast concrete. After the second waterstop 2 is installed, the protective cover 5 is installed on the pipe section and the base 3 to cover the second waterstop 2, preventing external seawater from eroding it and thus protecting it. The sacrificial anode 6 is existing technology. It is installed on the pipe section and electrically connected to the end plate 4. The sacrificial anode 6 and the end plate 4 are immersed in seawater. The sacrificial anode 6 is made of aluminum to give it a negative potential. The sacrificial anode 6 preferentially dissociates in seawater, thereby inhibiting corrosion of the end plate 4 and improving the service life of the entire underwater box culvert waterstop system.
[0041] The tie rod assembly 7 is used to fix two pipe sections together, tightening and fitting their mating ends. The tie rod assembly 7 includes a threaded rod and a nut mounted on the threaded rod. A first mounting seat 110 is provided on the installed pipe section 100, close to its mating end. A second mounting seat 210 is provided on the pipe section 200 to be installed, close to its mating end. The two ends of the threaded rod pass through the first mounting seat 110 and the second mounting seat 210 respectively, and are secured with nuts. Under the tension of the tie rod assembly 7, the two pipe sections abut against each other, clamping the first waterstop 1 and ensuring the sealing performance of the entire underwater culvert waterstop system.
[0042] like Figures 6 to 10As shown, the present invention also provides a method for connecting underwater box culverts, used to install an underwater box culvert water-stopping system onto two interconnecting pipe sections. Specifically, it includes the following steps: Step S1: Provide a base 3 and two pipe sections. One pipe section is an installed pipe section 100 already mounted on the underwater foundation, and the other pipe section is a pipe section 200 to be installed. A first mounting seat 110 is provided near the docking end of the installed pipe section 100, and a second mounting seat 210 is provided near the docking end of the pipe section 200 to be installed. Before installing the installed pipe section 100, the base 3 is pre-installed on the underwater foundation, and the docking end of the installed pipe section 100 is placed on the base 3. Specifically, to improve installation efficiency, all bases 3 can be installed after the underwater foundation is leveled. Then, the pipe sections are installed one by one on the underwater foundation. After the pipe sections are processed, end plates 4 are installed on the docking ends of the pipe sections and fixed using pre-embedded bolts.
[0043] Step S2: On land or a sea platform, install the first waterstop 1 to the mating end of the pipe section 200 to be installed. Use hoisting equipment to lift the pipe section 200 to be installed to the pre-dating position, ensuring a certain distance is maintained between the pipe section 200 to be installed and the already installed pipe section 100. Specifically, refer to... Figure 6 As shown, the first waterstop 1 is first installed onto the pipe section 200 to be installed to reduce the underwater action time. The hoisting equipment then lifts the pipe section 200 to be installed and gradually lowers it above the underwater foundation. (Refer to...) Figure 7 As shown, the position of the pipe section 200 to be installed is adjusted so that it is in the pre-connection position. When the pipe section 200 to be installed is in the pre-connection position, the distance between the pipe section 200 to be installed and the installed pipe section 100 is 50-100mm. The pipe section 200 to be installed is directly opposite the installed pipe section 100 in the horizontal direction. A certain distance is maintained between the pipe section 200 to be installed and the base 3 to avoid premature contact between the pipe section 200 to be installed and the base 3.
[0044] Step S3: Install both ends of the pulling device 8 onto the two pipe sections respectively, and use the pulling device 8 to drive the pipe section 200 to be installed to abut against the installed pipe section 100. After the two pipe sections are connected, install the tie rod assembly 7 on the two pipe sections and remove the pulling device 8. Specifically, refer to... Figure 8As shown, the connecting device 8 consists of a jack and connecting parts. Both ends of the connecting device 8 are respectively mounted on the first mounting base 110 and the second mounting base 210. The retraction motion of the jack drives the two pipe sections closer together and completes the docking. During the process of the two pipe sections approaching each other, the hoisting equipment synchronously lowers the pipe section 200 to be installed, so that the docking end of the pipe section 200 is placed on the base 3. The connecting device 8 has good guiding and controllability; therefore, when the two pipe sections are about to dock, the connecting device 8 drives the two pipe sections to dock, thereby improving docking efficiency and accuracy. (Refer to...) Figure 9 As shown, after the two pipe sections are connected, the two ends of the tie rod assembly 7 are first installed on the first mounting base 110 and the second mounting base 210 respectively, and the tie rod assembly 7 is permanently fixed on the underwater culvert to tighten the two adjacent pipe sections. Then the connecting device 8 is removed.
[0045] Step S4: Install the second waterstop 2 at the joint of the two pipe sections. The second waterstop 2 covers the joint between the top and sides of the two pipe sections, and both ends of the second waterstop 2 along its length are connected and fixed to the base 3. Specifically, refer to... Figure 9 As shown, the second waterstop 2 is laid on the joint. Then, along the length of the second waterstop 2, from the middle to both ends, the first pressure plate 91 and the second pressure plate 92 are installed sequentially and fixed with bolts 95. The hollow section 23 of the second waterstop 2 is pressed tightly using the first pressure plate 91 and the second pressure plate 92. Finally, the solid section 24 of the second waterstop 2 is installed on the base 3. The solid section 24 is pressed tightly using the third pressure plate 93, the elastic pressure block 94, and the channel steel assembly 96. The sacrificial anode 6 is then installed on the pipe section and electrically connected to the end plate 4.
[0046] Step S5: Install the protective cover 5 on the pipe section and the base 3, ensuring that the protective cover 5 covers the outer perimeter of the second waterstop 2. Specifically, refer to... Figure 10 As shown, a protective cover 5 is installed around the joint of the underwater box culvert to protect the second waterstop 2 from seawater erosion.
[0047] The beneficial effects of this embodiment are as follows: By setting a first waterstop 1 between two pipe sections, the internal and external spaces of the pipe section are isolated. By setting a second waterstop 2 on the outer surface of the pipe section, the joints of the top and two sides of the underwater box culvert are sealed, preventing external seawater, silt, or marine organisms from entering the joints, thus preventing the first waterstop 1 from contacting external seawater, silt, or marine organisms, which helps to extend the service life of the first waterstop 1. The first waterstop 1 and the second waterstop 2 together form a sealing structure between two adjacent pipe sections, which can further improve the sealing performance of the entire underwater box culvert waterstop system. In addition, by setting a base 3, the joint ends of the two adjacent pipe sections are supported. When the underwater foundation deforms, the joint ends of the two pipe sections can be relatively fixed, preventing relative displacement of the joint ends of the two pipe sections, thus preventing the first waterstop 1 from deforming or displacing due to misalignment of the two pipe sections, thereby ensuring the sealing performance of the entire underwater box culvert waterstop system.
[0048] Although embodiments of the invention have been described above with reference to the accompanying drawings, the invention is not limited to the above embodiments, but can be made in various forms, and those skilled in the art will understand that the invention can be implemented in other specific forms without changing the technical spirit or essential characteristics of the invention. Therefore, it should be understood that the above embodiments are exemplary in all respects and not restrictive.
Claims
1. An underwater box culvert water-stopping system, characterized in that, The system includes a first waterstop (1), a second waterstop (2), and a base (3). The connecting ends of the two pipe sections are both located on the base (3). The first waterstop (1) is clamped between the connecting ends of the two pipe sections. The first waterstop (1) is used to isolate the internal space of the pipe section from the external space. The second waterstop (2) is located on the outer surface of the pipe section. The second waterstop (2) covers the connecting seam on the top and side surfaces of the two pipe sections. The two ends of the second waterstop (2) along its width direction are connected to the two pipe sections respectively. The two ends of the second waterstop (2) along its length direction extend to the base (3) and are connected to the base (3).
2. The underwater culvert water-stopping system according to claim 1, characterized in that, The base (3) includes a concrete base plate (31) and an elastic pad (32). The elastic pad (32) is installed on the top surface of the concrete base plate (31) and abuts against the bottom surface of the pipe section.
3. The underwater culvert water-stopping system according to claim 2, characterized in that, The thickness of the concrete base plate (31) is 400-600 mm; and / or, along the width direction of the pipe section, the distance between the end face of the concrete base plate (31) and the pipe section is 1000-2000 mm.
4. The underwater culvert water-stopping system according to claim 1, characterized in that, The second waterstop (2) is an Ω waterstop. Along the length of the second waterstop (2), the second waterstop (2) includes a hollow section (23) and a solid section (24) connected to both ends of the hollow section (23). The hollow section (23) covers the butt joint of the top and side surfaces of the two pipe sections. The solid section (24) is used to connect with the base (3).
5. The underwater culvert water-stopping system according to claim 4, characterized in that, It also includes fasteners (9), which include a first pressure plate (91), a second pressure plate (92) and a bolt (95). The first pressure plate (91) is pressed flat against the hollow section (23) on the side away from the top surface of the pipe section. The first pressure plate (91), the hollow section (23) and the pipe section are fixed by the bolt (95). The second pressure plate (92) is pressed flat against the hollow section (23) on the side away from the side of the pipe section. The second pressure plate (92), the hollow section (23) and the pipe section are fixed by the bolt (95). The first pressure plate (91) located at the corner of the pipe section abuts against the second pressure plate (92) and is fixed by the bolt (95).
6. The underwater culvert water-stopping system according to claim 4, characterized in that, It also includes fasteners (9), which include a third pressure plate (93), an elastic pressure block (94), a channel steel assembly (96), and a pre-embedded screw (97). The elastic pressure block (94), the third pressure plate (93), and the channel steel assembly (96) are pressed flat on the side of the solid section (24) away from the base (3) from bottom to top. The channel steel assembly (96) is fixed to the base (3) by the pre-embedded screw (97). The elastic pressure block (94) is provided with a receiving groove for accommodating the protruding structure on the solid section (24).
7. The underwater box culvert water-stopping system according to any one of claims 1 to 6, characterized in that, It also includes end plates (4), and the two pipe sections are provided with end plates (4) at their connecting ends. The first waterstop (1) is clamped between the two end plates (4). The end plates (4) are metal plates, and sacrificial anodes (6) are electrically connected to the end plates (4).
8. The underwater box culvert water-stopping system according to any one of claims 1 to 6, characterized in that, It also includes a protective cover (5), which is installed on the pipe section and the base (3), and the protective cover (5) and the pipe section and the protective cover (5) and the base (3) form a receiving cavity for accommodating the second waterstop (2).
9. The underwater box culvert water-stopping system according to any one of claims 1 to 6, characterized in that, It also includes a tie rod assembly (7), the two ends of which are respectively connected to the two pipe sections, and the tie rod assembly (7) is used to tighten the two pipe sections.
10. A method for docking underwater box culverts, characterized in that, The method for installing the underwater box culvert water-stopping system according to any one of claims 1 to 9 onto two interlocking pipe sections specifically includes the following steps: Step S1: Provide a base (3) and two pipe sections, one of which is an installed pipe section (100) that has been installed on the underwater foundation, and the other is a pipe section (200) to be installed. Before installing the installed pipe section (100), the base (3) is installed on the underwater foundation in advance, and the docking end of the installed pipe section (100) is placed on the base (3). Step S2: Install the first waterstop (1) onto the docking end of the pipe section (200) to be installed, use hoisting equipment to hoist the pipe section (200) to be installed to the pre-dock position, and make a certain distance between the pipe section (200) to be installed and the installed pipe section (100); Step S3: Install both ends of the pulling device (8) onto the two pipe sections respectively, and use the pulling device (8) to drive the pipe section to be installed (200) to abut against the installed pipe section (100); after the two pipe sections are connected, install the pull rod assembly (7) on the two pipe sections and remove the pulling device (8). Step S4: Install a second waterstop (2) at the joint of the two pipe sections. The second waterstop (2) covers the joint of the top and side surfaces of the two pipe sections. The two ends of the second waterstop (2) in the length direction are connected to the base (3). Step S5: Install the protective cover (5) on the pipe section and the base (3), and make the protective cover (5) cover the periphery of the second waterstop (2).