Water diversion and drainage bidirectional pressure tunnel

Abstract

The invention discloses a water diversion and drainage bidirectional pressure tunnel. The water diversion and drainage bidirectional pressure tunnel comprises a water inlet pool section, an inlet pressure box culvert section, an inlet service gate, a pressure tunnel body section, an outlet pressure steel pipe section, an outlet control gate and a water diversion pump station. In the flood period,a working valve of the water diversion pump station is closed, and flood passes through the pressure tunnel and is controlled by the outlet control gate to drain the flood to a drainage area; and in the dry season, the outlet control gate is closed, and the water diversion pump station lifts water to a river channel through the pressure tunnel. Water diversion and drainage share the same tunnel, the tunnel function is not single any more, and the engineering operation management is facilitated while the land is saved, the engineering investment is greatly saved, and the economic benefits are remarkable.

Description

technical field [0001] The invention relates to a bidirectional pressurized tunnel for water diversion and drainage in water conservancy and hydropower projects, in particular to a pressurized tunnel that can divert water in dry seasons and drain floods in flood seasons in water diversion and drainage projects. Background technique [0002] In the water diversion project, when pumping stations are used to lift water in the discharge area, it is difficult to ensure that there is pressure in the tunnel and cavitation damage is not easy to occur. When the cross-sectional area of ​​water diversion is increased, the project investment will inevitably be increased, and the land area required for the water inlet and outlet is relatively large. , In plain areas where land is precious, land acquisition and demolition are extremely difficult. [0003] In flood drainage projects, when mountainous floods are drained, the flood peak flow is often large, but the duration is short, and non...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of single tunnel function and waste of resources during water diversion or drainage of conventional tunnels, and provide a pressurized tunnel with two-way sharing of water diversion and drainage, which can divert water in dry seasons and drain floods in flood seasons. On the one hand, it can effectively save engineering investment , which is convenient for operation and management; on the other hand, the drainage inlet pool doubles as the water diversion outlet, which can effectively save land

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