A water stop flange and equipment for grouting of a submarine tunnel riser

Abstract

The utility model relates to the field of submarine tunnel, specifically is a kind of submarine tunnel riser grouting water stop flange and equipment, water stop flange includes first flange, closed casing and delivery channel, one end of closed casing is connected first flange, closed casing is configured to include at least two cavities, delivery channel is straight channel, delivery channel is in turn through first flange and all cavities, at least one cavity is equipped with sealing ring, at least one cavity is used to set up sealing grease, first flange is used to connect grouting flange, and delivery channel is used for grouting pipe to pass through.The utility model is directly connected to grouting flange by first flange, and water stop flange can be directly connected to grouting flange;Through delivery channel provides assembly space for grouting pipe;Through the sealing ring and sealing grease set in cavity, grouting pipe is sealed, water stop flange provides double seal, improves sealing performance, effectively avoids sealing failure grouting mouth leakage or causes seawater to enter submarine tunnel by grouting channel.

Description

Technical Field

[0001] This utility model relates to the field of submarine tunnels, and in particular to a water-stop flange and equipment for grouting risers in submarine tunnels. Background Technology

[0002] When constructing large industrial facilities in coastal areas, such as nuclear power plants, thermal power plants, large data centers, or desalination plants, a large amount of cooling water is typically required to maintain their continuous and safe operation. Seawater, with its stable low temperature and abundant supply, is an ideal cooling medium. To achieve efficient cooling water intake and discharge, an increasingly widely used technical solution is to construct a subsea intake and discharge system. This involves excavating a subsea tunnel as a water passage tunnel to connect shore-based facilities to the open sea. The subsea tunnel is connected to the ocean via risers that penetrate the seabed. Because the riser structure centrally transmits the upper load and withstands complex environmental influences such as water flow erosion, wave circulation loads, seismic action, and long-term seepage erosion, the structural stability of the area where the riser bottom connects to the tunnel segments is crucial. Therefore, after the riser connects to the subsea tunnel segments, grouting reinforcement is required in the area surrounding the riser connection to the tunnel segments to form a reinforced zone, enhance load-bearing capacity, and prevent uneven settlement.

[0003] In existing technologies, the method of grouting reinforcement of the area surrounding the riser connection tunnel segments involves a ship drilling from the sea surface down to the area to be reinforced, and then delivering grout through a grouting pipe for reinforcement. This method is expensive to rent ships, and construction is restricted by sea conditions, which may cause delays in the construction period. Based on this, the applicant proposes to adopt a method of grouting from the inside of the submarine tunnel upwards, which requires the use of a new water-stop flange. Utility Model Content

[0004] The purpose of this invention is to address the existing method of grouting reinforcement around the riser tunnel segments, which involves a ship drilling from the sea surface to the area to be reinforced and then delivering grout through a grouting pipe. This method is expensive due to ship rental costs, is restricted by sea conditions, and may cause delays. Furthermore, if a reverse upward grouting method is used from inside the subsea tunnel, a new type of water-stop flange is required. This invention provides a water-stop flange and equipment for grouting risers in subsea tunnels.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: In a first aspect, this utility model provides a water-stop flange for grouting of riser pipes in submarine tunnels, including a first flange, a closed shell, and a conveying channel. One end of the closed shell is connected to the first flange. The closed shell is configured to include at least two cavities. The conveying channel is a straight channel that passes through the first flange and all the cavities in sequence. At least one cavity is provided with a sealing ring. At least one cavity is used to provide sealing grease. The first flange is used to connect to the grouting flange. The conveying channel is used for the grouting pipe to pass through.

[0006] The water-stop flange for grouting of subsea tunnel risers described in this utility model allows the water-stop flange to be directly connected to the grouting flange via the first flange; the conveying channel provides assembly space for the grouting pipe; the sealing ring and sealing grease inside the cavity seal the grouting pipe, providing a double seal for the water-stop flange, improving sealing performance, and effectively preventing grout leakage at the grouting port or seawater entering the subsea tunnel through the grouting channel due to seal failure; the water-stop flange has a simple structure, is easy to use, and has good performance.

[0007] As a preferred technical solution of this utility model, at least one transverse partition is provided inside the closed shell, and the conveying channel passes through the transverse partition.

[0008] As a further preferred technical solution of this utility model, the water-stop flange for grouting of the submarine tunnel riser also includes a first flange component and a second flange component. The first flange component includes a first flange plate and a first housing; the second flange component includes a second housing and the diaphragm; the first housing is connected to the second housing to form the closed housing.

[0009] As a further preferred technical solution of this utility model, the outer wall of the first housing is provided with an external thread, the inner wall of the opening of the second housing is provided with an internal thread, and the first flange component and the second flange component are connected by the external thread and the internal thread.

[0010] As a further preferred technical solution of this utility model, the diaphragm is connected inside the second housing.

[0011] As a further preferred technical solution of this utility model, the first flange is provided with a first through hole, the bottom of the second housing is provided with a second through hole, and the transverse partition is provided with a third through hole; the positions of the first through hole, the second through hole and the third through hole are aligned to form the conveying channel.

[0012] As a further preferred technical solution of this utility model, the cavity on the second flange component is connected to a grease injection pipe, and the end of the grease injection pipe is detachably connected to a pipe cap.

[0013] As a further preferred technical solution of this utility model, the cap and the grease injection pipe are threaded together.

[0014] As a preferred embodiment of this invention, the sealing ring is disposed in the cavity near the first flange, and the sealing grease is disposed in the cavity away from the first flange.

[0015] As a preferred technical solution of this utility model, the water-stop flange for grouting of the submarine tunnel riser also includes a second flange, which is arranged opposite to the first flange. The second flange is connected to the other end of the closed shell, and the conveying channel passes through the second flange. The second flange is used to connect the grouting pipe.

[0016] Secondly, this utility model also provides a device for grouting a riser in a submarine tunnel, including a grouting flange, a grouting pipe, and a water-stop flange for grouting a riser in a submarine tunnel as described in any one of the above; the grouting flange is connected to the inner end of a pre-embedded pipe installed in the tunnel segment, the water-stop flange is connected to the grouting flange, the grouting pipe passes through the water-stop flange, the grouting flange, and the pre-embedded pipe in sequence, and the grouting pipe is fixedly connected to the water-stop flange.

[0017] The subsea tunnel riser grouting equipment described in this utility model allows operators to drill upwards from the subsea tunnel through the pre-embedded pipes on the tunnel segments to the reinforcement area. The grouting equipment, consisting of the grouting flange, the water-stop flange, and the grouting pipe, delivers the grout to the reinforcement area. This avoids the high overall construction costs, sea condition restrictions, and short construction windows that can lead to delays associated with surface vessel-assisted grouting processes. The equipment is simple in structure, easy to use, and highly effective.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. The present invention relates to a water-stop flange for grouting of a riser in a submarine tunnel. The water-stop flange can be directly connected to the grouting flange via a first flange; the conveying channel provides assembly space for the grouting pipe; the sealing ring and sealing grease within the cavity seal the grouting pipe, providing a double seal for the water-stop flange, improving sealing performance, and effectively preventing grout leakage at the grouting port or seawater entering the submarine tunnel through the grouting channel. The water-stop flange has a simple structure, is easy to use, and has good performance. 2. The grouting equipment for submarine tunnel risers described in this utility model, through the pre-embedded pipes on the tunnel segments, allows operators to drill upwards from the submarine tunnel through the pre-embedded pipes to the reinforcement area. The grouting equipment, consisting of the grouting flange, the water-stop flange, and the grouting pipe, delivers the grout to the reinforcement area. This avoids the problems of high overall construction costs, construction restrictions due to sea conditions, short construction windows, and potential delays caused by using surface vessel-assisted grouting processes. The equipment has a simple structure, is easy to use, and has good performance. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a water-stop flange; Figure 2 This is a structural schematic diagram of the first flange component; Figure 3 This is a schematic diagram of the structure of the second flange component; Figure 4 A schematic diagram of the working process of a stop flange; Figure 5 A schematic diagram showing the installation location of the stop flange.

[0020] Marked in the image: 1-Tunnel segments; 2-Riser; 3-Reinforced area; 4-Pre-buried pipes; 5- Grouting flange; 6-Waterstop flange, 61-First flange component, 611-First flange, 6111-First through hole, 612-First housing, 6121-External thread, 62-Second flange component, 621-Second flange, 6211-Second through hole, 622-Second housing, 6221-Cavity, 6222-Internal thread, 623-Diaphragm, 6231-Third through hole, 63-Sealing ring; 64-Grease injection pipe, 641-Pipe cap, 65-Sealing grease; 7- Grouting pipe. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0022] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0024] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0025] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0026] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0027] In related technologies, the grouting reinforcement method for the connection area between the subsea tunnel and the riser is a surface vessel-assisted grouting process. An engineering vessel is positioned in the sea area above the riser, and then grouting holes are drilled vertically downwards from the sea surface using shipboard drilling equipment, penetrating seabed silt, sand layers, or weathered rock layers until reaching the target stratum surrounding the connection area between the riser and the tunnel segments. Then, the grouting pipe is lowered, and grout is pumped from the ship's mixing system through hoses to the underwater grouting point via a high-pressure grouting pump, achieving pressure grouting. This offshore operation method is highly dependent on large engineering vessels, resulting in high vessel rental costs and the need for specialized crew and divers, leading to high overall construction costs. Construction is also restricted by sea conditions, with a short construction window, which may cause delays. If a reverse upward grouting method is used from inside the subsea tunnel, a new water-stop flange is required. Therefore, the technical solution of this application was developed, which is described below in conjunction with... Figures 1 to 5 To elaborate.

[0028] Example 1 like Figures 1 to 5 As shown, the water-stop flange 6 for grouting of submarine tunnel risers according to this utility model includes a first flange 611, a closed shell, and a conveying channel.

[0029] One end of the enclosed housing is connected to the first flange 611. The enclosed housing is configured to include at least two cavities 6221. Specifically, at least one transverse partition 623 may be provided inside the enclosed housing, with the cavities 6221 on both sides of the transverse partition 623. The conveying channel is a straight channel that sequentially passes through the first flange 611, all the cavities 6221, and the transverse partition 623. At least one cavity 6221 is provided with a sealing ring 63, and at least one cavity 6221 is used to provide sealing grease 65. In some optional embodiments, the sealing ring 63 is a rubber ring, and in its natural state, the inner ring portion of the rubber ring penetrates the conveying channel. The sealing grease 65 is silicone grease or silicone oil-based lubricant. The first flange 611 is used to connect the grouting flange 5, and the conveying channel is used for the grouting pipe 7 to pass through.

[0030] In one alternative implementation, such as Figure 1 As shown, the water-stop flange 6 includes a first flange component 61 and a second flange component 62.

[0031] like Figure 2 As shown, the first flange component 61 includes a first flange 611 and a first housing 612. One end of the first housing 612 is connected to the first flange 611. The outer wall of the first housing 612 is provided with an external thread 6121. The first flange 611 is provided with a first through hole 6111.

[0032] like Figure 3As shown, the second flange component 62 includes a second flange 621, a second housing 622, and a transverse partition 623. One end of the second housing 622 is connected to the second flange 621. The inner wall of the opening of the second housing 622 is provided with an internal thread 6222. The transverse partition 623 is connected inside the second housing 622. Preferably, the transverse partition 623 is arranged parallel to the second flange 621. The second flange 621 is provided with a second through hole 6211, and the transverse partition 623 is provided with a third through hole 6231. The cavity 6221 on the second flange component 62 is connected to a grease injection pipe 64. The end of the grease injection pipe 64 is detachably connected to a pipe cap 641, preferably by a threaded connection.

[0033] like Figure 1 As shown, the second flange 621 and the first flange 611 are arranged opposite to each other. The first housing 612 is connected to the second housing 622 through the external thread 6121 and the internal thread 6222 to form the closed housing. The positions of the first through hole 6111, the second through hole 6211 and the third through hole 6231 are aligned to form the conveying channel, that is, the conveying channel passes through the second flange 621. The second flange 621 is used to connect the grouting pipe 7.

[0034] like Figure 4 As shown, the sealing ring 63 is provided in the cavity 6221 near the first flange 611, and the sealing grease 65 is provided in the cavity 6221 away from the first flange 611.

[0035] The water-stop flange for grouting of a subsea tunnel riser described in this embodiment allows the water-stop flange 6 to be directly connected to the grouting flange 5 via the first flange 611; the conveying channel provides assembly space for the grouting pipe 7; the sealing ring 63 and the sealing grease 65 provided in the cavity 6221 seal the grouting pipe 7, providing a double seal for the water-stop flange 6, improving sealing performance, and effectively preventing grout leakage at the grouting port due to seal failure or seawater entering the subsea tunnel through the grouting channel; the water-stop flange 6 has a simple structure, is easy to use, and has good performance.

[0036] Example 2 like Figures 1 to 5 As shown, the equipment for grouting of submarine tunnel risers according to this utility model includes a grouting flange 5, a grouting pipe 7, and a water-stop flange 6 for grouting of submarine tunnel risers as described in Example 1.

[0037] The grouting flange 5 is connected to the inner end of the pre-embedded pipe 4 installed in the tunnel segment 1. A sealing plate is connected to the grouting flange 5. The pre-embedded pipe 4 is made of steel pipe. The water-stop flange 6 is connected to the grouting flange 5. The grouting pipe 7 passes through the water-stop flange 6, the grouting flange 5, and the pre-embedded pipe 4 in sequence. The grouting pipe 7 is fixedly connected to the water-stop flange 6.

[0038] When using, please refer to Figure 5 Open the sealing plate on the grouting flange 5 and drill a grouting channel into the reinforced area 3 through the pre-embedded pipe 4.

[0039] See Figure 1 Assemble the water-stop flange 6, positioning the sealing ring 63 in place, without filling the sealing grease 65; see also Figure 5 Then, the first flange 611 of the water-stop flange 6 and the grouting flange 5 are connected.

[0040] See Figure 5 After the grouting pipe 7 is in place, during the process, the grouting pipe 7 forces the sealing ring 63 to deform (in conjunction with...). Figure 1 and Figure 4 As shown in the figure, it is tightly fitted to the outer wall of the grouting pipe 7, so that the grouting pipe 7 and the sealing ring 63 are sealed.

[0041] Then connect the grouting pipe 7 and the second flange 621; see Figure 4 Finally, unscrew the cap 641 at the end of the grease injection tube 64, fill the empty cavity 6221 with the sealing grease 65 through the grease injection tube 64, and then tighten the cap 641.

[0042] The grouting pipe 7 is connected to the grouting pump via a hose. When the grouting pump is started, grout is delivered to the reinforced area 3 through the grouting pipe 7 for grouting and reinforcement.

[0043] The subsea tunnel riser grouting equipment described in this embodiment, through the pre-embedded pipe 4 on the tunnel segment 1, allows operators to drill upwards from inside the subsea tunnel through the pre-embedded pipe 4 to the reinforced area 3. The grouting equipment is assembled by the grouting flange 5, the water-stop flange 6, and the grouting pipe 7 to deliver the grout to the reinforced area 3. This avoids the problems of high overall construction costs, construction restrictions due to sea conditions, short construction windows, and potential delays caused by using surface vessel-assisted grouting technology. The equipment has a simple structure, is easy to use, and has good results.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water-stop flange for grouting of risers in submarine tunnels, characterized in that, The device includes a first flange (611), a closed housing, and a conveying channel. One end of the closed housing is connected to the first flange (611). The closed housing is configured to include at least two cavities (6221). The conveying channel is a straight channel that passes through the first flange (611) and all the cavities (6221) in sequence. At least one cavity (6221) is provided with a sealing ring (63). At least one cavity (6221) is used to provide sealing grease (65). The first flange (611) is used to connect to a grouting flange (5). The conveying channel is used for the passage of a grouting pipe (7).

2. The water-stop flange for grouting of submarine tunnel risers according to claim 1, characterized in that, The enclosed housing is provided with at least one transverse partition (623), and the conveying channel passes through the transverse partition (623).

3. The water-stop flange for grouting of submarine tunnel risers according to claim 2, characterized in that, It also includes a first flange component (61) and a second flange component (62), the first flange component (61) including a first flange (611) and a first housing (612); the second flange component (62) including a second housing (622) and the diaphragm (623); the first housing (612) is connected to the second housing (622) to form the enclosed housing.

4. The water-stop flange for grouting of submarine tunnel risers according to claim 3, characterized in that, The outer wall of the first housing (612) is provided with an external thread (6121), and the inner wall of the opening of the second housing (622) is provided with an internal thread (6222). The first flange component (61) and the second flange component (62) are connected by the external thread (6121) and the internal thread (6222).

5. The water-stop flange for grouting of submarine tunnel risers according to claim 3, characterized in that, The diaphragm (623) is connected to the second housing (622).

6. The water-stop flange for grouting of submarine tunnel risers according to claim 3, characterized in that, The first flange (611) is provided with a first through hole (6111), the bottom of the second housing (622) is provided with a second through hole (6211), and the transverse partition (623) is provided with a third through hole (6231); the first through hole (6111), the second through hole (6211) and the third through hole (6231) are aligned to form the conveying channel.

7. The water-stop flange for grouting of submarine tunnel risers according to claim 3, characterized in that, The cavity (6221) on the second flange component (62) is connected to a grease injection tube (64), and the end of the grease injection tube (64) is detachably connected to a tube cap (641).

8. The water-stop flange for grouting of submarine tunnel risers according to claim 7, characterized in that, The cap (641) and the grease injection tube (64) are threaded together.

9. The water-stop flange for grouting of submarine tunnel risers according to any one of claims 1-8, characterized in that, It also includes a second flange (621), which is disposed opposite to the first flange (611). The second flange (621) is connected to the other end of the enclosed housing. The conveying channel passes through the second flange (621). The second flange (621) is used to connect the grouting pipe (7).

10. A grouting device for riser pipes in submarine tunnels, characterized in that, It includes a grouting flange (5), a grouting pipe (7), and a water-stop flange (6) for grouting of a submarine tunnel riser as described in any one of claims 1-9; the grouting flange (5) is connected to the inner end of a pre-embedded pipe (4) installed in the tunnel segment (1), the water-stop flange (6) is connected to the grouting flange (5), the grouting pipe (7) passes through the water-stop flange (6), the grouting flange (5), and the pre-embedded pipe (4) in sequence, and the grouting pipe (7) is fixedly connected to the water-stop flange (6).

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