An emergency sewage device for a seabed shield tunnel

Abstract

The utility model discloses a kind of emergency sewage device of seabed shield tunnel, including circulating backwater pipe, the circulating backwater pipe one end is connected with shield machine, the other end is connected with circulating water pool, further include sewage pump, first drain pipe and second drain pipe, the first drain pipe is connected between sewage pump and circulating backwater pipe, the second drain pipe is connected with circulating backwater pipe, and the output end of the second drain pipe is located outside tunnel, the connecting point of the first drain pipe and circulating backwater pipe is equipped with first stop valve between shield machine, the connecting point of the second drain pipe and circulating backwater pipe is equipped with second stop valve between circulating water pool, third stop valve is equipped on the first drain pipe, fourth stop valve is equipped on the second drain pipe.The utility model has the advantages of directly using existing circulating backwater pipe to layout, reduce space occupation.

Description

Technical Field

[0001] This utility model relates to the field of submarine tunnel construction technology, specifically to an emergency sewage discharge device for submarine shield tunnels. Background Technology

[0002] Shield tunnels traversing rivers, lakes, and seas are located in composite strata of water-rich sand, silt, silty clay, or weathered rock. The fissure water in the rock strata is connected to the seawater, exhibiting the "three highs" characteristics of high water pressure, high permeability, and high sensitivity. If a large-scale, sudden water inrush occurs due to factors such as shield tail brushing, hinge seal failure, segment joint seal failure, sudden water inrush in front of the cutterhead, or a burst mud pipe connected to the tunnel chamber, it could lead to the shield machine being submerged, blockage of rescue channels within the tunnel, and irreparable damage to equipment and personnel inside the tunnel.

[0003] To prevent seawater backflow, undersea shield tunnels are generally V-shaped. During shield tunneling in water-rich sections or on the seabed (riverbed), a circulating water inlet pipe and a circulating water return pipe are typically installed inside the tunnel to circulate cooling water and daily operating water for the shield machine. A corresponding daily sewage pipe is also installed along the shield machine for sewage discharge. In the event of a large-scale sudden water inrush, the existing technology generally uses a separate pumping and sewage discharge device, such as the emergency sewage discharge device disclosed in patent CN202322243409.3, to pump water and discharge sewage in the tunnel to avoid blocking the emergency passage. However, the space for pipeline layout in undersea shield tunnels is limited. Individually arranging each pipeline results in a complex structure, occupies a large amount of space, and is difficult to implement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an emergency sewage discharge device for submarine shield tunnels that utilizes existing circulating water pipes for layout and reduces space occupation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An emergency sewage discharge device for an undersea shield tunnel includes a circulating return water pipe, one end of which is connected to the shield machine and the other end to a circulating water tank. It also includes a sewage pump, a first drainage pipe, and a second drainage pipe. The first drainage pipe connects the sewage pump and the circulating return water pipe, and the second drainage pipe connects to the circulating return water pipe, with its output end located outside the tunnel. A first shut-off valve is installed between the connection point of the first drainage pipe and the circulating return water pipe and the shield machine, and a second shut-off valve is installed between the connection point of the second drainage pipe and the circulating return water pipe and the circulating water tank. A third shut-off valve is installed on the first drainage pipe, and a fourth shut-off valve is installed on the second drainage pipe.

[0006] As a further improvement to the above technical solution: The first drain pipe is equipped with a one-way valve.

[0007] The input end of the sewage pump is connected to a pumping pipe, and a filter screen is installed on the pumping pipe.

[0008] It also includes a first tee fitting and a second tee fitting. The circulating water return pipe includes a first branch pipe, a second branch pipe and a third branch pipe arranged in sequence. The three ports of the first tee fitting are respectively connected to the first branch pipe, the second branch pipe and the first drain pipe. The three ports of the second tee fitting are respectively connected to the second branch pipe, the third branch pipe and the second drain pipe. The first shut-off valve is located on the first branch pipe and the second shut-off valve is located on the third branch pipe.

[0009] The sewage pump is located at the bottom of the V-shaped submarine tunnel, and the first tee pipe is installed near the bottom of the V-shaped submarine tunnel.

[0010] The second tee pipe is located outside the tunnel.

[0011] Both the first and second tee fittings are connected to their respective pipes via flanges.

[0012] Both the second and third shut-off valves are located near the circulating return water pipe.

[0013] The first shut-off valve is located near the connection point between the first drain pipe and the circulating return water pipe, and the fourth shut-off valve is located near the connection point between the second drain pipe and the circulating return water pipe.

[0014] The first drain pipe between the sewage pump and the first shut-off valve is made of flexible hose, the first drain pipe between the first shut-off valve and the circulating return water pipe is made of galvanized steel pipe, and the second drain pipe is flexible hose.

[0015] Compared with the prior art, the advantages of this utility model are: This utility model discloses an emergency sewage discharge device for submarine shield tunnels. When the tunnel boring machine (TBM) is operating normally inside the tunnel, the first and second shut-off valves are open, while the third and fourth shut-off valves are closed. Cooling water or domestic water from the TBM flows back to the circulating water tank via the circulating return pipe for circulation. If a large-scale sudden water inrush occurs inside the tunnel, the first and second shut-off valves are closed, the third and fourth shut-off valves are opened, and the sewage pump is activated. Sewage inside the tunnel is discharged outside the tunnel through the first drainage pipe, the circulating return pipe, and the second drainage pipe, lowering the water level inside the tunnel, preventing blockage of escape routes, reducing damage to the TBM and other equipment from seawater backflow, and achieving an emergency sewage discharge effect. This emergency sewage discharge device for submarine shield tunnels connects the first and second drainage pipes to the existing circulating return pipe. Emergency drainage can be achieved by controlling the opening and closing of each shut-off valve, eliminating the need for a new set of piping equipment, reducing space occupation, and facilitating installation. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the emergency sewage discharge device for submarine shield tunnels according to this utility model.

[0017] The labels in the diagram represent: 1. Circulating water return pipe; 2. Sewage pump; 3. First drain pipe; 4. Second drain pipe; 5. First shut-off valve; 6. Second shut-off valve; 7. Third shut-off valve; 8. Fourth shut-off valve; 9. Circulating water tank; 10. Check valve; 11. Pumping pipe; 12. First tee installation pipe; 13. Second tee installation pipe; 14. First branch pipe; 15. Second branch pipe; 16. Third branch pipe. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Figure 1This invention illustrates an embodiment of the emergency sewage discharge device for a submarine shield tunnel. The device includes a circulating return water pipe 1, one end of which is connected to the tunnel boring machine (TBM), and the other end to a circulating water tank 9. It also includes a sewage pump 2, a first drainage pipe 3, and a second drainage pipe 4. The sewage pump 2 is located at the bottom of the V-shaped submarine tunnel. The first drainage pipe 3 connects the sewage pump 2 and the circulating return water pipe 1. The second drainage pipe 4 connects to the circulating return water pipe 1, and its output end is located outside the tunnel. A first shut-off valve 5 is provided between the connection point of the first drainage pipe 3 and the circulating return water pipe 1 and the TBM. A second shut-off valve 6 is provided between the connection point of the second drainage pipe 4 and the circulating return water pipe 1 and the circulating water tank 9. A third shut-off valve 7 is provided on the first drainage pipe 3, and a fourth shut-off valve 8 is provided on the second drainage pipe 4.

[0023] This emergency sewage discharge device for subsea shield tunnels operates as follows: When the tunnel boring machine (TBM) is working normally inside the tunnel, the first and second shut-off valves 5 and 6 are open, while the third and fourth shut-off valves 7 and 8 are closed. Cooling water or domestic water from the TBM flows back to the circulating water tank 9 via the circulating return pipe 1 for circulation. If a large-scale sudden water inrush occurs inside the tunnel, the first and second shut-off valves 5 and 6 are closed, while the third and fourth shut-off valves 7 and 8 are opened. The sewage pump 2 is activated, and sewage inside the tunnel is discharged outside the tunnel via the first drainage pipe 3, the circulating return pipe 1, and the second drainage pipe 4. This lowers the water level inside the tunnel, prevents blockage of escape routes, reduces the damage to the TBM and other equipment caused by seawater backflow, and achieves emergency sewage discharge. This emergency sewage discharge device connects the first and second drainage pipes 3 and 4 to the existing circulating return pipe 1. Emergency drainage can be achieved by controlling the opening and closing of each shut-off valve, eliminating the need for a new set of piping equipment, reducing space requirements, and facilitating installation.

[0024] Furthermore, in this embodiment, a one-way valve 10 is provided on the first drain pipe 3. The one-way valve 10 only allows sewage to be drawn into the first drain pipe 3 by the sewage pump 2, ensuring the normal operation of the sewage pump 2.

[0025] Furthermore, in this embodiment, the input end of the sewage pump 2 is connected to a pumping pipe 11, and a filter screen is provided on the pumping pipe 11. The filter screen (not shown in the figure) can filter out silt and sand in the sewage to prevent pump blockage.

[0026] Furthermore, in this embodiment, a first tee fitting 12 and a second tee fitting 13 are also included. The circulating return water pipe 1 includes a first branch pipe 14, a second branch pipe 15, and a third branch pipe 16 arranged sequentially. The three ports of the first tee fitting 12 are respectively connected to the first branch pipe 14, the second branch pipe 15, and the first drain pipe 3. The three ports of the second tee fitting 13 are respectively connected to the second branch pipe 15, the third branch pipe 16, and the second drain pipe 4. A first shut-off valve 5 is provided on the first branch pipe 14, and a second shut-off valve 6 is provided on the third branch pipe 16. The first tee fitting 12 and the second tee fitting 13 facilitate the manufacturing of the circulating return water pipe 1 and its connection with corresponding pipelines.

[0027] Furthermore, in this embodiment, the sewage pump 2 is located at the bottom of the V-shaped underwater tunnel, and the first tee pipe 12 is installed near the bottom of the V-shaped underwater tunnel. This facilitates the arrangement of the sewage pump 2 and shortens the length of the first drainage pipe 3, further reducing the space occupied by the equipment, and can effectively prevent the lowest point in the tunnel from being flooded, lower the water level, and avoid blocking the escape route. Furthermore, in this embodiment, the second tee installation pipe 13 is located outside the tunnel. This facilitates the installation of the second drainage pipe 4 and also reduces the space occupied by the second drainage pipe 4 inside the tunnel.

[0028] Furthermore, in this embodiment, both the first tee mounting pipe 12 and the second tee mounting pipe 13 are connected to their corresponding pipes via flanges. This ensures effective connection between the pipes and improves the overall operational stability of the device.

[0029] Furthermore, in this embodiment, both the second shut-off valve 6 and the third shut-off valve 7 are located close to the circulating water return pipe 1. During normal operation of the tunnel boring machine, this reduces the flow of circulating water into the first drainage pipe 3 and the second drainage pipe 4, thereby improving the utilization rate of the circulating water.

[0030] Furthermore, in this embodiment, the first shut-off valve 5 is located near the connection point between the first drain pipe 3 and the circulating water return pipe 1, and the fourth shut-off valve 8 is located near the connection point between the second drain pipe 4 and the circulating water return pipe 1. In the event of a large-scale sudden water inrush inside the tunnel, this allows the sewage to be discharged quickly, preventing damage to the tunnel boring machine and the circulating water tank 9.

[0031] Furthermore, in this embodiment, the first drain pipe 3 between the sewage pump 2 and the first shut-off valve 5 is made of a flexible hose, the first drain pipe 3 between the first shut-off valve 5 and the circulating return water pipe 1 is made of a galvanized steel pipe, and the second drain pipe 4 is a flexible hose. Flexible hoses facilitate drainage, while galvanized steel pipes help withstand water pressure inside the pipe, ensuring connection strength and providing some rust prevention.

[0032] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. An emergency sewage discharge device for a submarine shield tunnel, comprising a circulating water pipe (1), one end of which is connected to the shield machine and the other end to a circulating water tank (9), characterized in that: It also includes a sewage pump (2), a first drain pipe (3) and a second drain pipe (4). The first drain pipe (3) is connected between the sewage pump (2) and the circulating return water pipe (1). The second drain pipe (4) is connected to the circulating return water pipe (1), and the output end of the second drain pipe (4) is located outside the tunnel. A first shut-off valve (5) is provided between the connection point of the first drain pipe (3) and the circulating return water pipe (1) and the shield machine. A second shut-off valve (6) is provided between the connection point of the second drain pipe (4) and the circulating return water pipe (1) and the circulating water pool (9). A third shut-off valve (7) is provided on the first drain pipe (3), and a fourth shut-off valve (8) is provided on the second drain pipe (4).

2. The emergency sewage discharge device for submarine shield tunnels according to claim 1, characterized in that: The first drain pipe (3) is equipped with a one-way valve (10).

3. The emergency sewage discharge device for submarine shield tunnels according to claim 1, characterized in that: The input end of the sewage pump (2) is connected to a pumping pipe (11), and a filter screen is provided on the pumping pipe (11).

4. The emergency sewage discharge device for submarine shield tunnels according to claim 1, characterized in that: It also includes a first tee pipe (12) and a second tee pipe (13). The circulating return water pipe (1) includes a first branch pipe (14), a second branch pipe (15) and a third branch pipe (16) arranged in sequence. The three ports of the first tee pipe (12) are respectively connected to the first branch pipe (14), the second branch pipe (15) and the first drain pipe (3). The three ports of the second tee pipe (13) are respectively connected to the second branch pipe (15), the third branch pipe (16) and the second drain pipe (4). The first shut-off valve (5) is located on the first branch pipe (14) and the second shut-off valve (6) is located on the third branch pipe (16).

5. The emergency sewage discharge device for submarine shield tunnels according to claim 4, characterized in that: The sewage pump (2) is located at the bottom of the V-shaped submarine tunnel, and the first tee pipe (12) is set near the bottom of the V-shaped submarine tunnel.

6. The emergency sewage discharge device for submarine shield tunnels according to claim 4, characterized in that: The second tee pipe (13) is located outside the tunnel.

7. The emergency sewage discharge device for submarine shield tunnels according to claim 4, characterized in that: Both the first tee installation pipe (12) and the second tee installation pipe (13) are connected to the corresponding pipes via flanges.

8. The emergency sewage discharge device for submarine shield tunnels according to any one of claims 1 to 7, characterized in that: The second shut-off valve (6) and the third shut-off valve (7) are both located near the circulating return water pipe (1).

9. The emergency sewage discharge device for submarine shield tunnels according to claim 8, characterized in that: The first shut-off valve (5) is located near the connection point between the first drain pipe (3) and the circulating return water pipe (1), and the fourth shut-off valve (8) is located near the connection point between the second drain pipe (4) and the circulating return water pipe (1).

10. The emergency sewage discharge device for submarine shield tunnels according to any one of claims 1 to 7, characterized in that: The first drain pipe (3) between the sewage pump (2) and the first shut-off valve (5) is made of a flexible hose, the first drain pipe (3) between the first shut-off valve (5) and the circulating return water pipe (1) is made of galvanized steel pipe, and the second drain pipe (4) is made of a flexible hose.

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