Underground drainage system suitable for high pressure-bearing underground water foundation

Abstract

The invention discloses an underground drainage system suitable for a high pressure-bearing underground water foundation. The underground drainage system comprises a stilling pool bottom plate locatedabove a bed rock face. The stilling pool bottom plate is internally provided with an underdrain drainage network and a drainage gallery which are connected through steel pipes, and the drainage gallery communicates with a water collecting well pump room used for collecting underdrain seeped water. The underdrain drainage network comprises transverse drainage ditches and longitudinal drainage ditches which are vertically and horizontally interlaced, the transverse drainage ditches and the longitudinal ditches are composed of reinforced concrete prefabricated arches buckled on the bed rock face, and the bed rock face in the reinforced concrete fabricated arches is paved with a sand-free concrete cushion. A plurality of underground drainage pipes vertically and downwards extending from the bed rock ace are arranged below the sand-free concrete cushions of the longitudinal drainage ditches at intervals. The underground drainage system suitable for the high pressure-bearing underground water foundation is simple in structure, convenient to construct and low in maintaining cost, confined water head and seepage pressure can be effectively reduced, and the anti-floating stability of the stilling pool bottom plate is greatly improved.

Description

technical field [0001] The invention relates to the technical field of a dark drainage system for a high-pressure groundwater foundation in the construction industry, in particular to a dark drainage system suitable for a high-pressure groundwater foundation. Background technique [0002] There is an uplift pressure composed of osmotic pressure and buoyancy force at the bottom of the stilling basin and other high-pressure groundwater foundations. The uplift pressure is very unfavorable for the stability of the bottom plate of the stilling basin. Therefore, it is necessary to build a concealed drainage system matching the stilling basin. Conventional underground drainage systems mostly use sand-free concrete belts, flexible permeable pipes, or a combination of sand-free concrete and flexible permeable pipes. Water seepage is used to reduce the osmotic pressure at the bottom of the building, so only the seepage of the foundation surface can be eliminated, but the confined wate...

AI Technical Summary

Problems solved by technology

When the stilling tank is in the maintenance period, because there is no water in the tank, the bottom plate is supported by high-pressure groundwater, and the anti-floating stability is difficult to guarantee. How to reduce the pressure head of the pressurized water under the bottom plate of the stilling tank and maintain the anti-floating stability of the bottom plate sex is the current conundrum

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