A buried drainage system for stilling pool pipe network in power station

Abstract

The invention relates to a buried drainage system of a power station absorption basin pipe network. A buried drainage pipe network is arranged between the first phase of concrete and second phase of concrete of a power station absorption basin, and comprises a plurality of longitudinal blind ditch pipes and a plurality of horizontal drainage pipes; the longitudinal blind ditch pipes and the horizontal drainage pipes are deployed vertically; the longitudinal blind ditch pipes are connected with the horizontal drainage pipes; a plurality of vertical drainage holes which extend into bed rock are uniformly formed in the longitudinal blind ditch pipes; the horizontal drainage pipes are led to a foundation drainage gallery and a leakage sump well for pump drainage. According to the buried drainage system of the power station absorption basin pipe network, not only are problems of the drainage scheme of a traditional power station absorption basin solved, but also investment can be saved and the construction period can be shortened, and the buried drainage system of the power station absorption basin pipe network has the characteristics of novel structure, simple structure and reliability in use.

Description

technical field [0001] The invention relates to the technical fields of water conservancy and electric power, in particular to a buried drainage system for stilling pool pipe networks of power stations. Background technique [0002] Most of the energy generated by the high-speed water flow of the power station must be dissipated in the stilling pool. The flow state in the pool changes greatly, the water flow is strongly turbulent, and the operating conditions are complex. It is required that the anti-floating stability of the bottom plate under each operating condition can meet the requirements. In recent years, some power station stilling pools built in China have been damaged to varying degrees. The failure of stilling basins in some projects is due to poor bonding between concrete layers, unsmooth drainage system, or diving to the bottom due to large pulsating pressure. After analyzing the failure mechanism of stilling basins in similar projects, it is considered that th...

AI Technical Summary

Problems solved by technology

The closed drainage form of the corridor has vertical and horizontal corridors distributed in the bottom plate, and the structure type is complex; the corridor adopts a semi-embedded arrangement, the thickness of the bottom plate is not fully utilized, and the investment is large

However, the pulsating pressure in the exposed drainage form is easy to run down along the drainage holes, causing problems such as instability of the bottom plate

For this reason, the present invention changes the foundation drainage of the stilling basin from the traditional corridor closed drainage or open drainage to a new type of closed pipe network buried drainage system. At present, there is no application in the stilling basins of other domestic power stations or water conservancy projects.

Images