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A diversion tunnel structure and its plugging construction method

A technology for diversion tunnels and construction methods, which is applied in water conservancy projects, buildings, and hydroelectric power stations, etc., and can solve the problems of long scouring sections of diversion tunnels, increased project investment, and large excavation volumes of bypass tunnels, etc. Difficulty in construction, low cost, and shortened construction period

Active Publication Date: 2020-02-04
POWERCHINA ZHONGNAN ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme has problems such as the length of the diversion tunnel scour section, the large amount of excavation of the bypass tunnel, and the increase in project investment.

Method used

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  • A diversion tunnel structure and its plugging construction method
  • A diversion tunnel structure and its plugging construction method
  • A diversion tunnel structure and its plugging construction method

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Embodiment Construction

[0036] The following will refer to the accompanying drawings Figure 1 to Figure 3 The present invention will be described in detail in combination with examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. For the convenience of description, if the words "up", "down", "left" and "right" appear in the following, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

[0037] The invention mainly solves the construction diversion problem of large-scale high-water-head power stations in high mountains and valleys, and provides a new diversion tunnel structure and a plugging scheme of the diversion tunnel during water storage. In the following, a further proposal will be made on the structure of the diversion tunnel and the plugging scheme according to the present invention in co...

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Abstract

The invention relates to a diversion tunnel structure. The diversion tunnel structure comprises a first diversion tunnel and a second diversion tunnel. A first gate shaft is arranged on the upstream portion of the plug section of the first diversion tunnel and internally provided with a first gate matched with the first diversion tunnel, and a second gate shaft is arranged on the upstream portionof the plug section of the second diversion tunnel and internally provided with a second gate matched with the second diversion tunnel. An arc-shaped gate shaft is arranged on the downstream portion of the plug section of the second diversion tunnel and internally provided with an arc-shaped gate. The cross section size of the first diversion tunnel is larger than that of the second diversion tunnel. According to the diversion tunnel structure, after the first diversion tunnel is plugged, the downstream ecological water supply problem till can be solved through the mode that the second diversion tunnel drains ecological flow; and the arc-shaped gate shaft is arranged on the downstream portion of the plug section of the second diversion tunnel, scouring of a high waterhead on the diversiontunnels when the high waterhead drains ecological flow can be effectively reduced, engineering investment is decreased, and meanwhile, the problems that during flat gate arranging and plugging, the water level is high, the pressure difference is large, and gate closing is difficult are solved.

Description

technical field [0001] The invention relates to a diversion tunnel structure and a plugging construction method thereof, in particular to a diversion tunnel structure and a diversion tunnel plugging construction method for a large-scale hydropower station, and belongs to the technical field of water conservancy and hydropower engineering construction. Background technique [0002] Construction diversion is to create dry land construction conditions for the construction of hydropower stations. In the future, most of the large-scale hydropower stations to be built in my country will be located in high mountains and valleys, with steep slopes on both sides of the river bed. Construction diversion often uses excavation and diversion in mountains The tunnel diversion scheme of the tunnel makes the river divert and flow into the downstream channel through the diversion tunnel. [0003] Two diversion tunnels with the same cross-section size are often arranged in the large-scale hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B9/06
CPCE02B9/06Y02E10/20
Inventor 朱优平苏军安吴文洪
Owner POWERCHINA ZHONGNAN ENG
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