Ventilation and safety hole shared structure for hydropower station developed in stages

Abstract

This utility model discloses a shared structure for ventilation and safety tunnels in a phased development hydropower station in the field of water conservancy and hydropower technology. It includes two underground powerhouse cavern groups: Group 1 and Group 2. Access tunnels 1 and 2, respectively, are located at opposite ends of Group 1 and Group 2, connecting their interiors to the surface. At the end of Group 1 closest to Group 2, a branch tunnel 1 for ventilation and safety tunnels and a main tunnel for air intake and safety tunnels are located, connecting their interiors. A branch tunnel 2 for ventilation and safety tunnels, connecting to the interior of Group 2, branches off from the main tunnel. An underground powerhouse exploration tunnel also branches off from the main tunnel. This utility model, by branching off the underground powerhouse exploration tunnel from the main tunnel, can significantly shorten the length of the exploration tunnel, effectively reducing project investment and the design period during the feasibility study and survey phases.

Description

Technical Field

[0001] This utility model relates to the technical field of water conservancy and hydropower, and in particular to a shared structure for ventilation and safety tunnels in phased development hydropower stations. Background Technology

[0002] For hydropower stations in the water conservancy and hydropower industry, phased development is a suitable solution to adapt to the needs of socio-economic development. Since the reservoir is shared, the underground powerhouses in phased development projects are usually located close to each other. The underground powerhouse is the core of the power station, housing power generation equipment, main transformers, auxiliary equipment, etc. To meet construction and production needs, the underground powerhouse requires auxiliary chambers such as access tunnels and ventilation / safety tunnels.

[0003] In existing technologies, auxiliary caverns are usually set up separately, which not only increases the direct investment of the project, but also increases the construction period. Based on this, we propose a shared structure for ventilation and safety caverns in hydropower stations developed in phases. Utility Model Content

[0004] To address the issue that auxiliary caverns are typically set up separately, which not only increases direct investment in the project but also extends the construction period, this utility model provides a shared structure for ventilation and safety caverns in hydropower stations developed in phases.

[0005] This utility model provides a shared structure for ventilation and safety tunnels in a phased development hydropower station, employing the following technical solution:

[0006] A shared structure for ventilation and safety tunnels in a phased development hydropower station includes an underground powerhouse cavern group one and an underground powerhouse cavern group two. Access tunnels one and two, respectively, connecting their interiors to the surface, are located at opposite ends of the underground powerhouse cavern groups one and two, respectively. At the end of the underground powerhouse cavern group one closest to the underground powerhouse cavern group two, a branch tunnel one for ventilation and safety tunnels and a main tunnel for air intake and safety tunnels are located, connecting their interiors. A branch tunnel two for ventilation and safety tunnels, connecting to the interior of the underground powerhouse cavern group two, is branched off from the main tunnel for air intake and safety tunnels. An underground powerhouse exploration tunnel is also located at the main tunnel for underground powerhouse exploration.

[0007] By adopting the above-mentioned technical solution, the length of the exploration tunnel for the underground powerhouse can be greatly shortened by branching off from the main tunnel of the air intake and safety tunnel. This can effectively reduce the project investment and the design period of the feasibility study and survey design stage. At the same time, the second branch tunnel for ventilation and safety tunnel can be branched off from the main tunnel of the air intake and safety tunnel for the construction of the second underground powerhouse cavern group. This can effectively shorten the length of the second underground powerhouse cavern group, thereby reducing investment and the construction period of the second underground powerhouse cavern group.

[0008] Optionally, there is a gap between the first underground powerhouse cavern group and the second underground powerhouse cavern group.

[0009] By adopting the above technical solutions, the functions of underground powerhouse cavern group one and underground powerhouse cavern group two are made independent of each other, so as to reduce construction and operation interference.

[0010] Optionally, the height of the underground plant exploration tunnel gradually increases as it approaches the access tunnel 2.

[0011] By adopting the above-mentioned technical solutions, the problem of water accumulation in the exploration tunnel of the underground powerhouse can be solved, because the slope design helps natural drainage, reduces water damage, and thus improves construction safety and stability.

[0012] Optionally, the distance between the underground powerhouse exploration tunnel and the access tunnel's two arches is 20-40m.

[0013] By adopting the above technical solutions, it is possible to obtain geological information in a comprehensive and efficient manner.

[0014] Optionally, the main tunnel of the air intake and safety tunnel is branched off and has a lower horizontal tunnel for exhaust shafts. The lower horizontal tunnel for exhaust shafts is connected to an exhaust shaft at the end opposite to the main tunnel of the air intake and safety tunnel.

[0015] By adopting the above-mentioned technical solutions, ventilation shafts can be used for ventilation during the initial stage of construction of the underground powerhouse cavern group 2, which can significantly improve the air quality inside the cavern during the construction period.

[0016] In summary, this utility model has at least one of the following beneficial effects:

[0017] By branching off from the main tunnel, which serves as both an intake and safety tunnel, the length of the underground powerhouse exploration tunnel can be greatly shortened, effectively reducing project investment and the design period during the feasibility study and survey phase.

[0018] By branching off from the main ventilation and safety tunnel to form a second branch tunnel for the construction of the second underground powerhouse cavern group, the length of the second branch tunnel can be effectively shortened, thereby reducing investment and construction period.

[0019] By branching off from the exhaust shaft into the horizontal tunnel via the second ventilation and safety tunnel, ventilation can be carried out using the exhaust shaft during the initial stage of construction of the second underground powerhouse cavern group. This can significantly improve the air quality inside the caverns during the construction period of the second underground powerhouse cavern group, improve and enhance the image of safe and civilized construction, and reflect the people-oriented design concept. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the left-side structure of this utility model.

[0023] In the diagram: 1. Underground powerhouse cavern group one; 2. Underground powerhouse cavern group two; 3. Access tunnel one; 4. Access tunnel two; 5. Ventilation and safety tunnel branch tunnel one; 6. Ventilation and safety tunnel branch tunnel two; 7. Exhaust shaft lower horizontal tunnel; 8. Exhaust shaft; 9. Underground powerhouse exploration horizontal tunnel; 10. Air intake and safety tunnel main tunnel. Detailed Implementation

[0024] The following is in conjunction with the appendix Figures 1-2 The present invention will be described in further detail below.

[0025] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 2 This utility model provides one embodiment: a shared structure for ventilation and safety tunnels in a phased development hydropower station, comprising an underground powerhouse cavern group one 1 and an underground powerhouse cavern group two 2, with a gap between them. This ensures that the functions of the underground powerhouse cavern group one 1 and the underground powerhouse cavern group two 2 are independent, thereby reducing construction and operational interference.

[0026] Please refer to the attached diagram in the instruction manual. Figure 1 At the ends of underground powerhouse cavern group 1 and underground powerhouse cavern group 2 that are far apart from each other, access tunnels 1-3 and 2-4 are respectively set up to connect their interiors to the surface. At the end of underground powerhouse cavern group 1 closer to underground powerhouse cavern group 2, a ventilation and safety branch tunnel 1-5 and an intake and safety main tunnel 10 are set up to connect their interiors. An exhaust shaft lower horizontal tunnel 7 is set up at the branch of the intake and safety main tunnel 10. An exhaust shaft 8 is connected to the end of the exhaust shaft lower horizontal tunnel 7 that is away from the intake and safety main tunnel 10. Thus, ventilation can be carried out using the exhaust shaft 8 during the initial stage of construction of underground powerhouse cavern group 2, which can significantly improve the air quality inside the caverns during the construction period of underground powerhouse cavern group 2.

[0027] Please refer to the attached diagram in the instruction manual. Figure 1 and Figure 2The main ventilation and safety tunnel 10 branches off to a branch tunnel 26, which connects to the interior of the underground powerhouse cavern complex 2. The main tunnel 10 also branches off to an underground powerhouse exploration tunnel 9. The height of the exploration tunnel 9 gradually increases as it approaches the access tunnel 24. This design effectively solves the problem of water accumulation within the exploration tunnel 9, as the slope facilitates natural drainage, reducing flooding and improving construction safety and stability. The distance between the exploration tunnel 9 and the arch of the access tunnel 24 is 20-40 meters, which helps to obtain comprehensive and efficient geological information.

[0028] Working principle: During operation, the two underground powerhouses are located close to each other but have independent functions. Underground powerhouse cavern group 1 is developed in the first phase, while underground powerhouse cavern group 2 is developed in the second phase. The access tunnel 13 connecting the interior of underground powerhouse cavern group 1 and the access tunnel 24 connecting the interior of underground powerhouse cavern group 2 are independently set up to reduce construction and operation interference. The main ventilation and safety tunnel 10, the branch ventilation and safety tunnel 15, the lower horizontal tunnel 7 of the exhaust shaft, and the exhaust shaft 8 are constructed simultaneously during the construction of underground powerhouse cavern group 1, which is developed in the first phase. The underground powerhouse exploration branch is located from the main ventilation and safety tunnel 10. The horizontal tunnel 9 can greatly shorten the length of the exploration tunnel, effectively reducing project investment and the design period of the feasibility study and surveying stage. During the construction of the underground powerhouse cavern group 2 in the second phase of development, the ventilation and safety branch tunnel 2 6 branched directly from the main tunnel 10 (which serves as both an intake and safety tunnel) is used for the construction of the underground powerhouse cavern group 2 2. This can effectively shorten the length of the ventilation and safety branch tunnel 2 6, thereby reducing investment and the construction period of the underground powerhouse cavern group 2 2. During the construction process, ventilation can be carried out using the exhaust shaft 8, which can significantly improve the air quality inside the cavern during the construction period of the underground powerhouse cavern group 2 2.

[0029] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A shared structure for ventilation and safety tunnels in a phased development hydropower station, comprising an underground powerhouse cavern group one (1) and an underground powerhouse cavern group two (2), characterized in that: The underground factory cavern group 1 (1) and the underground factory cavern group 2 (2) are respectively provided with access tunnel 1 (3) and access tunnel 2 (4) connecting their interiors and the ground. The underground factory cavern group 1 (1) is provided with ventilation and safety branch tunnel 1 (5) and air intake and safety main tunnel (10) connecting its interiors. The air intake and safety main tunnel (10) is branched with ventilation and safety branch tunnel 2 (6) connecting with the interior of the underground factory cavern group 2 (2). The air intake and safety main tunnel (10) is also branched with an underground factory exploration tunnel (9).

2. The shared structure for ventilation and safety tunnels in a phased development hydropower station according to claim 1, characterized in that: There is a gap between the underground powerhouse cavern group one (1) and the underground powerhouse cavern group two (2).

3. The shared structure for ventilation and safety tunnels in a phased development hydropower station according to claim 1, characterized in that: The height of the underground plant exploration tunnel (9) gradually increases as it approaches the access tunnel 2 (4).

4. The shared structure for ventilation and safety tunnels in a phased development hydropower station according to claim 1, characterized in that: The distance between the top arch of the underground plant exploration tunnel (9) and the access tunnel 2 (4) is 20-40m.

5. The shared structure for ventilation and safety tunnels in a phased development hydropower station according to claim 1, characterized in that: The main tunnel (10) of the air intake and safety tunnel is branched off and has a lower horizontal tunnel (7) for exhaust shafts. The lower horizontal tunnel (7) of the exhaust shafts is connected to an exhaust shaft (8) at the end away from the main tunnel (10).

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