Pressure reduction and water drainage system under ultra-deep underground space structure bottom plate

Abstract

The invention discloses a pressure reduction and water drainage system under an ultra-deep underground space structure bottom plate. The pressure reduction and water drainage system is characterized by being composed of an inverted filter, water drainage pipes, water collection wells and pumping wells, the inverted filter, the water drainage pipes, the water collection wells and the pumping wells are arranged below the bottom plate, and the water drainage pipes form a mesh-shaped water drainage pipe network through a plurality of steel pipes provided with small holes; the water collection wells are arranged at the joints of the water drainage pipes which are longitudinally and transversely intersected; the pumping wells are arranged outside the water drainage pipes and communicated with the water collection wells; underground water is converged to the water collection wells from the drainage pipes in the inverted filter and is pumped out through the pumping wells. Compared with the prior art, the requirement for the anti-crack performance of the bottom plate is low, the pressure reduction effect and the anti-floating effect are good, the surrounding ground surface settlement can be effectively controlled while the bottom plate meets the anti-floating requirement, the number of anti-floating piles which are arranged is greatly decreased, the structure is simple, construction is convenient, the engineering cost is low, and the pressure reduction and water drainage system is particularly suitable for the anti-floating design of an underground space structure which is 30 m deep.

Description

technical field [0001] The invention relates to the field of underground structure anti-floating technology, in particular to a decompression drainage system under the floor of an ultra-deep underground space structure. Background technique [0002] With the acceleration of urbanization, the development of underground space has been paid more and more attention. For underground buildings such as large-scale underground shopping malls and underground parking garages, the buoyancy of the basement floor due to the penetration of groundwater and surface water has become an engineering project. focus in design. [0003] At present, the anti-floating measures in underground engineering are mainly to install anti-floating anchors and anti-floating piles under the floor, and to balance the buoyancy of groundwater by increasing the overlying weight of the underground structure or setting anti-floating anchors and anti-lift piles. The strength is reasonable, and the later maintenance...

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Problems solved by technology

[0003] At present, the anti-floating measures in underground engineering are mainly to install anti-floating anchors and anti-floating piles under the floor, and to balance the buoyancy of groundwater by increasing the overlying weight of the underground structure or setting anti-floating anchors and anti-lift piles. The strength is reasonable, and the later maintenance is simple and convenient, but the engineering cost is relatively large, and the requirements for crack resistance and fatigue resistance of the structure are high

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