Combined type waterproof drainage system of underground structure in overlying permeable stratum

Abstract

The invention relates to a combined type waterproof drainage system of an underground structure in an overlying permeable stratum, and belongs to the technical field of waterproof drainage systems ofunderground structures. The combined type waterproof drainage system isolates the water permeating channel of the overlying permeable stratum by arranging an anti-permeating body, shortens the construction period and lowers the water pumping and drainage cost in the operation period. By arranging a water permeable inverted filter and water drainage holes, leakage water can be guided and drained out, thus the underground structure is prevented from bearing too high water pressure, meanwhile, the soil pressure applied on a pit support structure is transmitted to the underground structure throughthe water permeable inverted filter, the underground structure and the pit support structure can jointly bear the soil pressure under a permanent condition, and accordingly the structure safety is ensured.

Description

Technical field [0001] The invention relates to a combined waterproof drainage system of an underground structure in an overlying water-permeable stratum, and belongs to the technical field of waterproof drainage systems of underground structures. Background technique [0002] During the construction period of the underground project, the foundation pit drainage measures are mainly used to ensure normal construction conditions. During the operation period, the self-waterproofing capacity of concrete and the use of waterproof coils, waterproof coatings and other measures are mainly used to solve the problem of concrete seepage prevention. Soil water pressure. [0003] For underground structures such as ultra-deep subway stations and basements, when the local underground water depth is relatively shallow and the stratum has strong water permeability, the construction period may face large foundation pit seepage and high drainage costs, and the structural external walls will bear more...

AI Technical Summary

Problems solved by technology

[0003] For underground structures such as ultra-deep subway stations and basements, when the buried depth of the groundwater is relatively shallow and the stratum has strong water permeability, the construction period may face a large amount of water seepage in the foundation pit, and the cost of pumping and drainage is high. Large external water pressure and prone to water seepage and other problems, which will affect the normal use and threaten the quality and safety of the main structure

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