External water pressure reducing structure of surge chamber

Abstract

The invention relates to the field of water conservancy and hydropower facilities, in particular to an external water pressure reducing structure of a surge chamber, and the external water pressure reducing structure of the surge chamber is low in cost and effectively realizes external water collection so as to directly and effectively reduce the external water pressure. The external water pressure reducing structure comprises the surge chamber, a drainage pipe network system is arranged in the wall surface of the surge chamber, and the drainage pipe network system is in communication with a surge chamber drainage pipe arranged at the bottom of the surge chamber; and when the surge chamber needs to be overhauled in actual use, firstly, all water inside the surge chamber is drained, then, the drainage pipe network system in the wall surface of the surge chamber is used for orderly collecting external water, and the collected external water is gathered to the surge chamber drainage pipe so as to be finally drained, so that the external water pressure is directly and effectively reduced. According to the external water pressure reducing structure of the surge chamber, the change of the existing structure is small, the corresponding cost is low, and various hidden dangers caused by overlarge external water pressure can be effectively relieved. The external water pressure reducing structure is particularly suitable for occasions of decompression of the external water pressure of the surge chamber.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower facilities, in particular to a pressure-regulating outdoor water pressure decompression structure. Background technique [0002] With the country's demand for hydropower and clean energy, a large number of high dams have been built to generate electricity using water heads. In order to reduce the impact on the environment and improve the adaptability to hub layout, a large number of underground workshops have been built. Pressure chamber and meet the requirements of reflected water shock wave. The deep-buried surge chamber is affected by the water surface line of the mountain body and the water seepage in the surge chamber, and the external water pressure is relatively high. When the surge chamber is overhauled, all the internal water body is drained, and the external water pressure is relatively high. Generally, bedrock consolidation grouting and surge chamber reinforcement are us...

AI Technical Summary

Problems solved by technology

However, this method is limited in reducing the external water head, and the consolidation grouting increases the construction period (increasing the grouting process), and the corresponding investment is relatively large. At the same time, the risk of consolidation grouting polluting the environment is relatively high, which is not conducive to environmental protection

In addition, the reinforcement of the surge chamber is strengthened to resist the external water pressure, the amount of steel used is large, the investment is large, and resources are wasted, which does not meet the national energy-saving and emission-reduction requirements.

Images