A hole opening and site collaborative excavation structure of a pumped storage power station underground powerhouse

Abstract

A kind of underground powerhouse of pumped storage power station hole and site collaborative excavation structure, including underground powerhouse and main transformer hole, the underground powerhouse connects the entrance of ventilation and safety hole and factory traffic hole, the main transformer hole connects the entrance of ventilation and safety hole, factory traffic hole and cable hole, the outlet of ventilation and safety hole, factory traffic hole and cable hole connects switch station collaborative excavation site.One, three caverns and switch station share a site, overall collaborative excavation, form switch station collaborative excavation site, save excavation, support engineering quantity, save land, save investment;Two, the site of multiple buildings is collaboratively excavated as a whole, reducing the number of slope excavation, reducing disturbance to natural slope and vegetation, which is beneficial to slope stability, reducing the amount of excavation, reducing soil erosion and being environmentally friendly;Three, the outlets of three caverns and switch station are centrally arranged, facilitating operation and maintenance management during operation.

Description

Technical Field

[0001] This utility model relates to the underground powerhouse of a pumped storage power station, and in particular to a structure for the coordinated excavation of the entrance and site of the underground powerhouse of a pumped storage power station, belonging to the field of water conservancy and hydropower engineering technology. Background Technology

[0002] In pumped storage power stations and conventional hydropower stations, underground powerhouses are a common type, while switchyards are usually located on the surface for convenient daily operation and maintenance. The underground powerhouse needs to be connected to the surface through auxiliary caverns. The three main auxiliary caverns are the access tunnel, the ventilation and safety tunnel, and the cable tunnel. The access tunnel is the main passage during the construction and operation of the underground powerhouse. The ventilation and safety tunnel is a construction support tunnel on the powerhouse roof during construction and serves as a ventilation and safety evacuation passage during operation. The cable tunnel connects the surface switchyard and the underground main transformer tunnel, primarily used for laying high-voltage cables.

[0003] In previous layout schemes, the entrances to the power plant's access tunnels and ventilation / safety tunnels were excavated separately, each requiring its own designated site. The switchyard site was also excavated separately, with cable tunnels connecting to the switchyard site. This separate excavation of each site resulted in multiple excavation faces, leading to a large volume of excavation and support work. Furthermore, in the western region, the slopes are steep, making multi-site excavation less adaptable to the terrain. The entrance sites are the entrances and exits to the underground powerhouse, and the switchyard is a crucial location for energy transmission. The rational layout of the entrances and switchyard sites not only affects the direct investment of the project but also directly impacts the safe operation of the power plant. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of existing technologies and provide a collaborative excavation structure for the entrance and site of the underground powerhouse of a pumped storage power station that saves land and materials, reduces investment, minimizes disturbance and damage to natural slopes and vegetation, and is beneficial to slope stability.

[0005] The technical solution of the present invention for the collaborative excavation structure of the underground powerhouse of a pumped storage power station is as follows: it includes an underground powerhouse and a main transformer tunnel. The underground powerhouse is connected to the entrance of a ventilation and safety tunnel and an access tunnel. The main transformer tunnel is connected to the entrance of the ventilation and safety tunnel, the access tunnel, and the cable tunnel. The exit of the ventilation and safety tunnel, the access tunnel, and the cable tunnel is connected to the collaborative excavation site of the switch station.

[0006] Furthermore, the cable tunnel is located in the middle of the site, the ventilation and safety tunnel (3) is located on the upper side of the cable tunnel, and the access tunnel is located on the lower side of the cable tunnel.

[0007] Furthermore, the site for the coordinated excavation of the switch station is arranged in a zigzag pattern following the terrain.

[0008] Furthermore, a drainage ditch is set outside the slope opening line of the site to be excavated in conjunction with the switch station.

[0009] The beneficial effects of this utility model's collaborative excavation structure for the entrance and site of an underground powerhouse in a pumped storage power station are:

[0010] 1. The three tunnels—ventilation and safety tunnel, access tunnel, and cable tunnel—and the switch station share a single site for coordinated excavation, forming a coordinated excavation site for the switch station, which saves on excavation and support work, land use, and investment.

[0011] Second, the coordinated excavation of sites with multiple buildings reduces the amount of slope excavation, minimizes disturbance and damage to natural slopes and vegetation, is beneficial to slope stability, reduces soil erosion, and is environmentally friendly.

[0012] Third, the ventilation and safety tunnel, the access tunnel to the plant, and the cable tunnel are centrally located at their exits and switch stations to facilitate operation and maintenance management during operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the entrance and site collaborative excavation structure of the underground powerhouse of a pumped storage power station according to the present invention. Detailed Implementation

[0014] This utility model relates to a structure for the coordinated excavation of the entrance and site of an underground powerhouse in a pumped storage power station, such as... Figure 1 As shown, it includes an underground powerhouse 1 and a main transformer tunnel 2. The underground powerhouse 1 is connected to the entrance of the ventilation and safety tunnel 3 and the access tunnel 4. The main transformer tunnel 2 is connected to the entrance of the ventilation and safety tunnel 3, the access tunnel 4 and the cable tunnel 5. The exit of the ventilation and safety tunnel 3, the access tunnel 4 and the cable tunnel 5 is connected to the switch station co-excavation site 6.

[0015] Furthermore, the cable tunnel 5 is located in the middle of the site, the ventilation and safety tunnel 3 is located above the cable tunnel 5, and the access tunnel 4 is located below the cable tunnel 5. Positioning the cable tunnel 5 in the middle of the site facilitates the routing of high-voltage cables within the switchyard, while placing the ventilation and safety tunnel 3 and the access tunnel 4 on the upper and lower sides of the cable tunnel 5 respectively facilitates access.

[0016] Furthermore, the excavation site 6 for the switch station is arranged in a zigzag pattern following the terrain, which can reduce the amount of excavation.

[0017] Furthermore, a drainage ditch 8 is installed outside the slope opening line 7 of the site excavation area 6 for the switch station. With the drainage ditch 8, the drainage needs of the site and the three openings of the ventilation and safety tunnel 3, the access tunnel 4, and the cable tunnel 5 can be met simultaneously.

[0018] This utility model discloses a collaborative excavation structure for the entrances and site of an underground powerhouse in a pumped storage power station. By centrally arranging the entrance sites of three chambers—ventilation and safety tunnel 3, access tunnel 4, and cable tunnel 5—in an adjacent area, and excavating the entire entrance site, a collaborative excavation site 6 for the switchyard is formed. The dimensions of the collaborative excavation site 6 must not only meet the traffic needs of the entrances themselves but also the equipment layout requirements of the switchyard. First, the three chambers—ventilation and safety tunnel 3, access tunnel 4, and cable tunnel 5—and the switchyard share a single site, and are excavated collaboratively as a whole, forming the collaborative excavation site 6 for the switchyard, saving excavation and support work, land area, and investment. Second, the collaborative excavation of multiple structures reduces the amount of slope excavation, minimizes disturbance to natural slopes and vegetation, is beneficial to slope stability, reduces soil erosion, and is environmentally friendly. Third, the centralized arrangement of the exits of the three chambers—ventilation and safety tunnel 3, access tunnel 4, and cable tunnel 5—and the switchyard facilitates operation and maintenance management during the operational phase.

Claims

1. A structure for the coordinated excavation of the entrance and site of an underground powerhouse in a pumped storage power station, characterized in that: It includes an underground powerhouse (1) and a main transformer tunnel (2). The underground powerhouse (1) is connected to the entrance of a ventilation and safety tunnel (3) and an access tunnel (4). The main transformer tunnel (2) is connected to the entrance of a ventilation and safety tunnel (3), an access tunnel (4) and a cable tunnel (5). The exits of the ventilation and safety tunnel (3), the access tunnel (4) and the cable tunnel (5) are connected to the excavation site (6) of the switch station.

2. The structure for the coordinated excavation of the entrance and site of the underground powerhouse of a pumped storage power station as described in claim 1, characterized in that: The cable tunnel (5) is located in the middle of the site, the ventilation and safety tunnel (3) is located on the upper side of the cable tunnel (5), and the access tunnel (4) is located on the lower side of the cable tunnel (5).

3. The structure for the coordinated excavation of the entrance and site of the underground powerhouse of a pumped storage power station as described in claim 1, characterized in that: The site (6) for the coordinated excavation of the switch station is arranged in a zigzag pattern following the terrain.

4. The structure for the coordinated excavation of the entrance and site of the underground powerhouse of a pumped storage power station as described in claim 1, characterized in that: A drainage ditch (8) is set outside the slope opening line (7) of the site (6) for the coordinated excavation of the switch station.

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