Water and electricity co-corridor prefabricated tunnel

Abstract

The utility model relates to the field of tunnels and underground engineering, in particular to a water and electricity co-corridor prefabricated tunnel which comprises a tunnel body formed by splicing shield segments, a water supply area and a power supply area are arranged in the tunnel body, the power supply area is arranged above the water supply area, a water supply pipeline is arranged in the water supply area, and a plurality of cable supports are arranged in the power supply area. The cable supports are arranged at intervals in the circumferential direction of the tunnel body, the water supply area and the power supply area are isolated through a middle partition plate, the middle partition plate is further provided with a manhole and a manhole cover for selectively opening and closing the manhole, and a ladder stand extending downwards is further arranged below the manhole. The tunnel is constructed by adopting a shield method, the tunnel main body is formed by splicing the shield segments, and water and electricity are separated by adopting the middle partition plate to form the fireproof subareas, so that the fireproof performance of the tunnel is improved; the middle partition plate is provided with a manhole and a crawling ladder so that constructors or maintainers can conveniently penetrate through the manhole and move between the power supply area and the water supply area in the construction or maintenance process, and tunnel construction and maintenance are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of tunnels and underground engineering, and in particular to a prefabricated tunnel for sharing a hydropower corridor. Background Art

[0002] As an important part of modern urban infrastructure construction, the integrated pipe gallery has received more and more attention. In the construction process of the integrated pipe gallery, prefabricated structure technology is widely used, which can greatly improve construction efficiency and project quality. Prefabricated structure technology can separate production and construction. A large number of components can be prefabricated in the factory, reducing the time of on-site processing and construction, thereby greatly improving construction efficiency. Prefabrication in the factory can control the construction environment and material quality, reduce variables in the on-site construction process, and better ensure the quality of the project.

[0003] The shield method is a method of dark tunnel construction at present. It forms holes by pushing the shield machine in the soil, and then sets the shield segments in the holes to form support. The shield method is widely used for its high construction efficiency and high space utilization of circular corridors. However, the existing shield corridor tunnel structure is not very reasonable, which leads to inconvenience in construction and maintenance. Summary of the invention

[0004] The utility model aims to provide a prefabricated tunnel for sharing water and electricity corridors, so as to solve the above-mentioned problems of inconvenience in construction and maintenance of existing shield tunnel corridors.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a prefabricated tunnel with a common corridor for water and electricity, comprising a tunnel body formed by splicing shield segments, a water supply area and a power supply area are provided in the tunnel body, the power supply area is arranged above the water supply area, the water supply area is provided with a water supply pipe, a plurality of cable brackets are arranged in the power supply area, and the cable brackets are arranged at intervals along the circumferential direction of the tunnel body, the water supply area and the power supply area are separated by a middle partition, a manhole and a manhole cover for selectively opening and closing the manhole are also provided on the middle partition, and a ladder extending downward is also provided under the manhole.

[0006] In one embodiment, the tunnel body is provided with a concrete lining structure on the side wall located in the water supply area, and corbels are provided on both sides of the lining structure. The middle diaphragm is arranged on the corbels so that the corbels form a supporting structure of the middle diaphragm.

[0007] In one embodiment, the corbel is provided with a drain pipe, one end of which is connected to the power supply area, and the other end extends to the water supply area, so that the drain pipe is used to discharge the accumulated water in the power supply area to the water supply area, and the drain pipes are arranged at intervals along the longitudinal depth direction of the tunnel body.

[0008] In one embodiment, the manhole cover is a hydraulic manhole cover with a fireproof function, so that the manhole cover and the middle partition cooperate to form a fireproof partition structure between the water supply area and the power supply area.

[0009] In one embodiment, the manhole is a through hole with a diameter greater than 800 mm.

[0010] In one embodiment, there are multiple manholes, which are arranged at intervals along the longitudinal depth direction of the tunnel body, and the spacing between adjacent manholes is greater than 150m. On the cross-section of the tunnel body, the cable holder extends laterally from the inner wall of the tunnel body to the center of the tunnel body, thereby forming a power supply inspection channel between the cable holders extending in opposite directions. The manhole is located in the power supply inspection channel.

[0011] In one embodiment, the water supply area is provided with a pier for supporting the water supply pipeline, and a main inspection channel is also provided on one side of the pier, and the ladder is located between the pier and the main inspection channel.

[0012] In one embodiment, the inner wall of the tunnel body is provided with an annular steel frame, the arch of the annular steel frame is provided with a first inspection robot track, and at least two second inspection robot tracks are provided on the side of the middle partition facing the water supply area, and the second inspection robot tracks are arranged on both sides of the ladder, and the first inspection robot track and the second inspection robot track extend respectively along the longitudinal direction of the tunnel body.

[0013] In one embodiment, the cable support is fixedly disposed on the inner side of the tunnel body by connecting to the annular steel frame.

[0014] In one embodiment, a plurality of fire partition walls are arranged at intervals in the longitudinal direction of the tunnel body, and the fire partition walls are provided with holes for passing the water supply pipe, the cables connected to the cable bracket, and the middle partition plate. The fire partition walls are also provided with fire doors respectively located in the power supply area and the water supply area, and fire partitions are formed on both sides of the fire partition walls.

[0015] The beneficial effects of the utility model are as follows: the tunnel of the utility model is constructed by the shield method, and the main body of the tunnel is formed by splicing shield segments. The tunnel section is divided into upper and lower areas to form a power supply area and a water supply area. The power supply area and the water supply area are separated by a middle partition to form a fire partition, thereby improving the fire resistance of the tunnel. A manhole and a ladder are arranged on the middle partition to facilitate construction personnel or maintenance personnel to pass through and move between the power supply area and the water supply area during construction or maintenance, thereby facilitating the construction and maintenance of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a tunnel cross-sectional view of an embodiment of the utility model.

[0017] Figure 2 It is a structural diagram of a middle partition and a ladder in an embodiment of the utility model.

[0018] Figure 3 It is a structural diagram of a buttress and an arc-shaped pad according to an embodiment of the utility model.

[0019] Figure 4 It is a structural diagram of a fire partition wall in an embodiment of the utility model.

[0020] Among them: 1 tunnel main body, 11 water supply area, 12 power supply area, 120 power supply maintenance channel, 13 anchor nails, 14 lining structure, 141 corbels, 2 water supply pipes, 21 piers, 22 arc pads, 23 anchor steel bars, 24 drainage pipes, 3 cable brackets, 4 middle partitions, 41 manholes, 42 second inspection robot tracks, 5 manhole covers, 6 ladders, 7 circular steel frames, 71 first inspection robot tracks, 8 drain pipes, 9 main maintenance channel, 10 fire partition walls, 101 fire doors. DETAILED DESCRIPTION

[0021] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] See also Figure 1 to Figure 2 As shown, the utility model discloses a prefabricated tunnel for water and electricity co-existing corridors, which is constructed by a shield method, and includes a tunnel body 1 formed by splicing shield segments, a water supply area 11 and a power supply area 12 are arranged in the tunnel body 1, and the power supply area 12 is arranged above the water supply area 11, the water supply area 11 is provided with a water supply pipeline 2, and a plurality of cable supports 3 are arranged in the power supply area 12, and the cable supports 3 are arranged at intervals along the circumferential direction of the tunnel body 1, the water supply area 11 and the power supply area 12 are separated by a middle partition 4, a manhole 41 and a manhole cover 5 for selectively opening and closing the manhole 41 are also provided on the middle partition 4, and a ladder 6 extending downward is also provided below the manhole 41.

[0023] The tunnel constructed by the shield method forms a circular cross-section, which is divided into upper and lower sections by the middle partition 4 to form a water supply area 11 and a power supply area 12. The middle partition 4 is used to form a fire partition to prevent the water supply area 11 and the power supply area 12 from affecting each other in the event of a fire. Secondly, the setting of the manhole 41 and the ladder 6 allows construction personnel or maintenance personnel to move back and forth between the water supply area 11 and the power supply area 12 through them, which is convenient for transporting construction materials during tunnel construction and maintenance. The manhole cover 5 set on the manhole 41 can cooperate with the middle partition 4 to form a fireproof partition structure between the water supply area 11 and the power supply area 12. The manhole cover 5 of this embodiment is a hydraulic manhole cover with a fireproof function, which ensures the fireproof effect of the fireproof partition structure.

[0024] The shield segments, water supply pipes 2, cable supports 3, middle partitions 4, manhole covers 5 and ladders 6 are all prefabricated parts. After being prefabricated in the factory, they are transported to the tunnel construction site for assembly, which reduces the time of on-site construction and improves construction efficiency. Since prefabricated parts are prefabricated in the factory, they are usually produced in large quantities, so quality control is more stringent and easier to achieve, thereby improving the quality of the project. Finally, prefabricated tunnels can reduce the impact of the construction site on the environment and traffic, and reduce problems such as noise and dust caused by construction.

[0025] The manhole 41 is a through hole with a diameter greater than 800 mm, and the diameter of the manhole 41 is further preferably greater than 1 m, so that construction personnel and maintenance personnel can pass through the manhole 41. In order to facilitate maintenance personnel and construction personnel to accurately reach the predetermined position of the power supply area 12, a plurality of manholes 41 are provided, which are arranged at intervals along the longitudinal direction of the tunnel body 1, and the spacing between adjacent manholes 41 is greater than 150 m. On the cross-section of the tunnel body 1, the cable support 3 extends horizontally from the inner wall of the tunnel body 1 to the middle, thereby forming a power supply maintenance channel 120 between the cable supports 3 extending in opposite directions (the area in the dotted box in the figure is the power supply maintenance channel), and the manhole 41 is located between the cable supports 3, that is, the manhole 41 is located in the power supply maintenance channel 120. After the construction personnel pass through the manhole 41 and enter the power supply area 12, they can reach the power supply maintenance channel 120, making the overall layout of the power supply area 12 more reasonable. The middle partition 4 is arranged horizontally and the ladder 6 is extended vertically, so that the middle partition 4 and the ladder 6 form a T-shaped structure, which occupies less space in the tunnel and has a reasonable layout. At the same time, it is convenient for maintenance personnel to move between the water supply area 11 and the power supply area 12.

[0026] The inner wall of the tunnel body 1 is provided with an annular steel frame 7, and the cable support 3 is fixedly arranged on the inner side of the tunnel body 1 by connecting the annular steel frame 7. A plurality of anchors 13 are pre-embedded on the shield segments constituting the tunnel body 1, and the annular steel frame 7 is fixedly arranged on the inner side of the tunnel body 1 by the anchors 13. The arch of the annular steel frame 7 is provided with a first inspection robot track 71, and the first inspection robot track 71 extends along the depth direction of the tunnel body 1. The first inspection robot track 71 is used to install an inspection robot, and conduct power inspection on the power supply area 12 during the use of the tunnel, so as to realize automatic and intelligent inspection of the tunnel.

[0027] Two second inspection robot tracks 42 are provided on one side of the middle partition 4 facing the water supply area 11. The second inspection robot tracks 42 are arranged on both sides of the ladder 6. The second inspection robot tracks 42 also extend along the depth direction of the tunnel body 1. The second inspection robot tracks 42 are used to install inspection robots in the water supply area 11. The inspection robots arranged in the water supply area 11 are used to inspect the water supply area 11 and cooperate with the inspection robots in the power supply area 12 to realize automatic intelligent inspection of the tunnel.

[0028] The water supply area 11 and the power supply area 12 are respectively provided with lighting lamps. The lighting lamps of the water supply area 11 are arranged on the lower surface of the middle partition 4, on one side of the second inspection robot track 42, and the lighting lamps of the power supply area 12 are arranged on the arch of the annular steel frame 7, on one side of the first inspection robot track 71. The lighting lamps can illuminate the tunnel so that the inspection robot can perform more accurate inspections.

[0029] The tunnel body 1 is provided with a concrete lining structure 14 on the side wall located in the water supply area 11. Corbels 141 are provided on both sides of the lining structure 14. The middle partition 4 is arranged on the corbels 141 so that the corbels 141 form a supporting structure for the middle partition 4. The lining structure 14 adopts a reinforced concrete cast-in-place structure to increase the strength of the tunnel body 1. A deformation joint with a width of 20 mm is arranged every ≤30m, and the deformation joint is flush with the annular joint of the shield segment. The corbel 141 is formed during the pouring process of the lining structure 14. It is located at the top of the lining structure 14. The corbel 141 extends laterally into the interior of the tunnel body 1, thereby forming a supporting structure for supporting the middle partition 4. In order to enhance the fire prevention effect between the water supply area 11 and the power supply area 12, cement mortar is used to fill the gap between the middle partition 4 and the corbel 141. The corbel 141 is buried with a drain pipe 8, one end of which is connected to the power supply area 12, and the other end extends to the water supply area 11, so that the drain pipe 8 is used to discharge the accumulated water in the power supply area 12 to the water supply area 11, and the drain pipes 8 are arranged at intervals along the longitudinal direction of the tunnel body 1, further ensuring the power safety of the power supply area 12. The middle partition 4 is a prefabricated structure. When the strength of the corbel 141 of the cast-in-place concrete structure reaches the design strength, the middle partition 4 can be placed on the corbel 141, and cement mortar is set between the middle partition 4 and the corbel 141 to fill the gap.

[0030] See also Figure 1 and Figure 3 As shown, the water supply area 11 is provided with a pier 21 for supporting the water supply pipe 2. A main inspection channel 9 is also provided on one side of the pier 21. A ladder 6 is located between the pier 21 and the main inspection channel 9. The pier 21 and the main inspection channel 9 are both cast-in-place concrete structures. The main inspection channel 9 is used for maintenance personnel to walk in the water supply area 11. Drainage ditches are set every 20m in the main inspection channel 9 to ensure the dryness and safety of the main inspection channel 9. The water supply pipe 2 is a ductile iron round pipe of DN1600. In order to enable the pier 21 to support the water supply pipe 2 more stably, the upper surface of the pier 21 is an arc-shaped groove structure. The arc-shaped groove structure is formed by setting an arc pad 22 during the casting process. The arc pad 22 is fixedly connected to the pier 21 by anchoring steel bars 23. The water supply pipe 2 is supported by the pier 21 by being placed on the arc pad 22. A drainage pipe 24 is also provided at the lower part of the pier 21.

[0031] See also Figure 4 As shown, in the longitudinal direction of the tunnel body 1, a plurality of fire partition walls 10 are arranged at intervals. The fire partition walls 10 are provided with holes for passing water supply pipes 2, cables connected to cable brackets 3, middle partitions 4 and other objects extending in the longitudinal direction of the tunnel body 1. The fire partition walls 10 are also provided with fire doors 101 located in the power supply area 12 and the water supply area 11 respectively. When the fire doors 101 are closed, fire partitions are formed on both sides of the fire partition walls 10. The wall surface of the fire partition walls 10 is made of cement, lime and fly ash as raw materials, with a strength level not less than A5.0, a dry volume density of B06 (first-class product), and aerated concrete blocks with a thickness of 190 are laid from the ground, and the upper part and the left and right edges of the later-laid wall opening need to be expanded 100mm to meet the fire resistance limit requirements of the fire partition. The fire partition walls 10 and the fire doors 101 are filled tightly with rock wool.

[0032] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A prefabricated tunnel for hydropower co-existence, comprising a tunnel body formed by splicing shield segments, characterized in that: A water supply area and a power supply area are provided in the tunnel body. The power supply area is arranged above the water supply area. The water supply area is provided with a water supply pipeline. A plurality of cable brackets are arranged in the power supply area, and the cable brackets are arranged at intervals along the circumferential direction of the tunnel body. The water supply area and the power supply area are separated by a middle partition. A manhole and a manhole cover for selectively opening and closing the manhole are also provided on the middle partition. A ladder extending downward is also provided below the manhole.

2. A prefabricated tunnel for hydropower sharing corridor according to claim 1, characterized in that: The tunnel body is provided with a concrete lining structure on the side wall located in the water supply area, and corbels are provided on both sides of the lining structure. The middle diaphragm is arranged on the corbels so that the corbels form a supporting structure of the middle diaphragm.

3. A prefabricated tunnel for hydropower sharing corridor according to claim 2, characterized in that: The corbel is provided with a drain pipe, one end of which is connected to the power supply area, and the other end extends to the water supply area, so that the drain pipe is used to discharge the accumulated water in the power supply area to the water supply area, and the drain pipes are arranged at intervals along the longitudinal depth direction of the tunnel body.

4. The prefabricated tunnel for hydropower sharing corridor according to claim 1 is characterized by: The manhole cover is a hydraulic manhole cover with a fireproof function, so that the manhole cover and the middle partition cooperate to form a fireproof partition structure between the water supply area and the power supply area.

5. The prefabricated tunnel for hydropower sharing corridor according to claim 1 is characterized by: The manhole is a through hole with a diameter greater than 800 mm.

6. A prefabricated tunnel for hydropower sharing corridor according to claim 5, characterized in that: There are multiple manholes, which are arranged at intervals along the longitudinal depth direction of the tunnel body, and the spacing between adjacent manholes is greater than 150m. On the cross-section of the tunnel body, the cable bracket extends laterally from the inner wall of the tunnel body to the center of the tunnel body, thereby forming a power supply inspection channel between the cable brackets extending in opposite directions. The manhole is located in the power supply inspection channel.

7. The prefabricated tunnel for hydropower sharing corridor according to claim 1 is characterized by: The water supply area is provided with a pier for supporting the water supply pipeline, and a main inspection channel is also provided on one side of the pier. The ladder is located between the pier and the main inspection channel.

8. The prefabricated tunnel for hydropower sharing corridor according to claim 1 is characterized by: The inner wall of the tunnel body is provided with an annular steel frame, the arch of the annular steel frame is provided with a first inspection robot track, and at least two second inspection robot tracks are provided on the side of the middle partition facing the water supply area. The second inspection robot tracks are arranged on both sides of the ladder, and the first inspection robot track and the second inspection robot track extend respectively along the longitudinal direction of the tunnel body.

9. The prefabricated tunnel for hydropower sharing corridor according to claim 8, characterized in that: The cable support is fixedly arranged on the inner side of the tunnel body by connecting with the annular steel frame.

10. The prefabricated tunnel for hydropower sharing corridor according to claim 1, characterized in that: In the longitudinal direction of the tunnel body, a plurality of fire partition walls are arranged at intervals. The fire partition walls are provided with holes for passing the water supply pipe, the cables connected to the cable bracket, and the middle partition. The fire partition walls are also provided with fire doors respectively located in the power supply area and the water supply area, and fire partitions are formed on both sides of the fire partition walls.

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