Ventilation hole arrangement structure for reducing construction period of underground powerhouse of pumped storage power station

Abstract

The utility model discloses a ventilation hole arrangement structure for reducing the construction period of an underground powerhouse of a pumped storage power station, which comprises an auxiliary powerhouse hole, an installation field hole and a main engine hole, the auxiliary powerhouse hole and the installation field hole are respectively arranged at two ends of the main engine hole, and one end of the auxiliary powerhouse hole is provided with a ventilation and safety hole communicated with the inside of the auxiliary powerhouse hole and the ground. And one end of the installation field hole is provided with a plant ventilation branch hole communicated with the interior of the installation field hole and the ventilation and safety hole to form a double-channel closed-loop network. The workshop ventilation branch hole communicated with the ventilation and safety hole is formed in one side of the installation field hole, a double-channel structure connected with the top arches at the two ends of the underground workshop is formed, workshop top arch construction is carried out in a double-side synchronous excavation mode, and the defect that traditional one-way excavation is low in efficiency is effectively overcome. The overall construction period can be remarkably shortened, the project investment is saved, meanwhile, the ventilation effect is optimized, and the safety in the construction and operation period is improved.

Description

Technical Field

[0001] This utility model relates to the field of underground structure design for water conservancy and hydropower projects, specifically a ventilation tunnel layout structure for reducing the construction cycle of underground powerhouses in pumped storage power stations. Background Technology

[0002] In the field of pumped storage power stations, the underground powerhouse is the core structure, used to house generator sets, main transformers, and auxiliary equipment. Its construction period directly impacts the overall project progress and construction costs. Currently, the construction of the underground powerhouse's roof arch commonly employs a single-sided ventilation and safety tunnel. This ventilation tunnel must simultaneously serve as a transport channel for excavated soil during construction and an air intake channel, while also functioning as an air intake channel and safety escape exit during operation. In actual projects, unidirectional excavation of the roof arch not only prolongs the construction period but also leads to excessively high wind speeds due to the single ventilation load. Finally, a single escape route also poses safety hazards during operation. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a ventilation tunnel layout structure that reduces the construction period of the underground powerhouse of a pumped storage power station, thereby overcoming the problems of low construction efficiency and long construction period caused by the traditional single-sided ventilation tunnel layout.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a ventilation tunnel layout structure for reducing the construction period of the underground powerhouse of a pumped storage power station, including an auxiliary powerhouse tunnel, an installation site tunnel, and a main unit tunnel. The auxiliary powerhouse tunnel and the installation site tunnel are respectively set at both ends of the main unit tunnel. One end of the auxiliary powerhouse tunnel is provided with a ventilation and safety tunnel connecting its interior and the ground. One end of the installation site tunnel is provided with a powerhouse ventilation branch tunnel connecting its interior and the ventilation and safety tunnel, forming a dual-channel closed-loop network.

[0005] The top elevation of the auxiliary plant cave is the same as the top elevation of the installation site cave and the main unit room cave to ensure the overall coordination of the cave structure.

[0006] The top elevation of the auxiliary plant tunnel is the same as the top elevation of the connecting tunnel section of the ventilation and safety tunnel, which allows the ventilation and safety tunnel to be directly connected to the top arch of the auxiliary plant tunnel, facilitating the transportation of excavated soil during construction and ventilation during operation.

[0007] The top elevation of the installation site tunnel is the same as the top elevation of the connecting tunnel to the ventilation branch tunnel of the plant, ensuring that the ventilation branch tunnel of the plant can be effectively connected to the top arch position of the installation site tunnel, so as to achieve simultaneous excavation on both sides.

[0008] The top elevation of the connecting section of the ventilation and safety tunnel is the same as the top elevation of the connecting tunnel of the factory ventilation branch tunnel, so as to ensure smooth airflow transition in the connecting section of the two tunnels and reduce ventilation resistance.

[0009] The beneficial effects of this invention are as follows: By arranging a ventilation branch tunnel connected to the ventilation and safety tunnel on one side of the installation site, a dual-channel structure is formed that connects to the arches at both ends of the underground plant. The simultaneous excavation from both sides is used for the construction of the plant's arches, effectively overcoming the low efficiency of traditional unidirectional excavation. This significantly shortens the overall construction period, saves on project investment, optimizes ventilation, and improves safety during construction and operation. Attached Figure Description

[0010] Figure 1 This is a plan view of the ventilation tunnel layout structure for reducing the construction period of the underground powerhouse of a pumped storage power station, according to this utility model. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0012] In the description of this utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model 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.

[0013] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0014] like Figure 1 As shown, the ventilation tunnel layout structure of this utility model for reducing the construction period of the underground powerhouse of a pumped storage power station includes an auxiliary powerhouse tunnel 1, an installation site tunnel 2, and a main unit tunnel 3. The auxiliary powerhouse tunnel 1 and the installation site tunnel 2 are respectively located at both ends of the main unit tunnel 3. One end of the auxiliary powerhouse tunnel 1 is provided with a ventilation and safety tunnel 4 connecting its interior and the ground. One end of the installation site tunnel 2 is provided with a powerhouse ventilation branch tunnel 5 connecting its interior and the ventilation and safety tunnel, forming a dual-channel closed-loop network.

[0015] Preferably, the top elevation of the auxiliary plant tunnel 1 is the same as the top elevation of the installation site tunnel 2 and the main unit tunnel 3 to ensure the overall coordination of the tunnel structure.

[0016] Preferably, the top elevation of the auxiliary plant tunnel 1 is the same as the top elevation of the connecting tunnel section of the ventilation and safety tunnel 4, so that the ventilation and safety tunnel 4 can be directly connected to the top arch of the auxiliary plant tunnel 1, which facilitates the transportation of excavated soil during construction and ventilation during operation.

[0017] Preferably, the top elevation of the installation site tunnel 2 is the same as the top elevation of the connecting tunnel of the factory ventilation branch tunnel 5, ensuring that the factory ventilation branch tunnel can be effectively connected to the top arch position of the installation site tunnel 2, so as to realize simultaneous excavation on both sides.

[0018] Preferably, the top elevation of the connecting section of the ventilation and safety tunnel 4 is the same as the top elevation of the connecting section of the factory ventilation branch tunnel 5, so as to ensure a smooth airflow transition in the connecting section of the two tunnels and reduce ventilation resistance.

[0019] Specifically, in this embodiment of the invention, the auxiliary plant tunnel 1 and the installation site tunnel 2 are respectively arranged at both ends of the main equipment room tunnel 3, forming the main structure of the underground plant. One end of the auxiliary plant tunnel 1 is provided with a ventilation and safety tunnel 4, which extends to the ground and forms the main channel for transporting construction waste and the air intake channel during operation. One end of the installation site tunnel 2 is provided with a plant ventilation branch tunnel 5, which is topologically connected to the ventilation and safety tunnel 4 to form a double-channel closed-loop network, so that the auxiliary plant tunnel 1, the installation site tunnel 2, and the main equipment room tunnel 3 are located in the arrangement area surrounded by the two tunnels.

[0020] The top elevation of the connecting tunnel section of ventilation and safety tunnel 4 is consistent with the top elevation of auxiliary plant tunnel 1, ensuring that ventilation and safety tunnel 4 is directly connected to the arch area of ​​auxiliary plant tunnel 1, achieving seamless connection between the excavation path and the arch excavation face; the top elevation of the connecting tunnel section of plant ventilation branch tunnel 5 is consistent with the top elevation of installation site tunnel 2, enabling plant ventilation branch tunnel 5 to precisely connect to the arch area of ​​installation site tunnel 2, supporting simultaneous construction on both sides; ventilation and safety tunnel 4 and plant ventilation branch tunnel 5 serve as excavation channels and air intake channels, realizing coordinated operation of excavation transportation and ventilation; ventilation and safety tunnel 4 serves as the main air intake channel and safety exit, while plant ventilation branch tunnel 5 serves as an auxiliary air intake channel, with the two tunnels together forming a redundant ventilation network.

[0021] During construction, ventilation and safety tunnel 4 was excavated from the ground surface toward auxiliary plant tunnel 1. After the ventilation and safety tunnel 4 was excavated to the axis position of auxiliary plant tunnel 1, the ventilation branch tunnel 5 was excavated in the direction of installation site tunnel 2, forming a Y-shaped intersection node. The two tunnels were used to transport excavated soil simultaneously, and finally the connection of auxiliary plant tunnel 1, installation site tunnel 2 and main unit room tunnel 3 was completed.

[0022] 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 ventilation tunnel layout structure for reducing the construction period of the underground powerhouse of a pumped storage power station, comprising an auxiliary powerhouse tunnel (1), an installation yard tunnel (2), and a main unit room tunnel (3), wherein the auxiliary powerhouse tunnel (1) and the installation yard tunnel (2) are respectively located at both ends of the main unit room tunnel (3), characterized in that, A ventilation and safety tunnel (4) connecting the interior of the auxiliary plant tunnel (1) and the ground is provided at one end, and a plant ventilation branch tunnel (5) connecting the interior of the installation site tunnel (2) and the ventilation and safety tunnel is provided at one end, forming a dual-channel closed-loop network.

2. The ventilation tunnel layout structure for reducing the construction period of the underground powerhouse of a pumped storage power station according to claim 1, characterized in that, The top elevation of the auxiliary plant cave (1) is the same as the top elevation of the installation site cave (2) and the main unit room cave (3) to ensure the overall coordination of the cave structure.

3. The ventilation tunnel layout structure for reducing the construction period of the underground powerhouse of a pumped storage power station according to claim 1, characterized in that, The top elevation of the auxiliary plant tunnel (1) is the same as the top elevation of the connecting tunnel section of the ventilation and safety tunnel (4), so that the ventilation and safety tunnel (4) can be directly connected to the top arch position of the auxiliary plant tunnel (1), which facilitates the transportation of excavated soil during construction and ventilation during operation.

4. The ventilation tunnel layout structure for reducing the construction period of the underground powerhouse of a pumped storage power station according to claim 1, characterized in that, The top elevation of the installation site tunnel (2) is the same as the top elevation of the connecting tunnel of the factory ventilation branch tunnel (5), ensuring that the factory ventilation branch tunnel can be effectively connected to the top arch position of the installation site tunnel (2) to achieve simultaneous excavation on both sides.

5. The ventilation tunnel layout structure for reducing the construction period of the underground powerhouse of a pumped storage power station according to claim 1, characterized in that, The top elevation of the connecting section of the ventilation and safety tunnel (4) is the same as the top elevation of the connecting section of the factory ventilation branch tunnel (5) to ensure smooth airflow transition in the connecting section of the two tunnels and reduce ventilation resistance.

Images