Waterproofing process for underground excavating side wall of station in water-rich stratum

Abstract

The invention discloses a waterproofing process for underground excavating a side wall of a station in a water-rich stratum. The waterproofing process is characterized in that the waterproofing process comprises the following steps that S1, the flatness and protrusions of the surface of the side wall are processed, and then vertical blind pipes are vertically laid; the vertical blind pipes are closely attached to the surface of the side wall, and a longitudinal blind pipe cross with the vertical blind pipes communicates with the bottoms of the vertical blind pipes for stream guidance; S2, plastic cloth is laid on the side wall, the plastic cloth enables the vertical blind pipes and the longitudinal blind pipe to be tightly clamped between the surface of the side wall and the plastic cloth;the plastic cloth acts as an additional layer between the surface of the side wall and a waterproof layer and plays a role of water-proof drainage, when the surface meets the requirements, geotextileis laid in time, and waterproof coiled material is constructed; S3, the longitudinal blind pipe is tightly attached to the top surface of a strip footing; and S4, construction of a second lining is carried out, and a side wall construction joint is formed between the surface of the side wall and the inner side of the second lining. The blocking and drainage functions of the plastic cloth are utilized, and moreover, the collecting and guiding functions of the blind pipes are utilized, so that the base surface requirement of the waterproof construction is met.

Description

Technical field [0001] The invention relates to a construction technique for the side wall of a subsurface excavated station, in particular to a waterproof technique for the subsurface excavation of a station wall in a water-rich stratum. Background technique [0002] When digging an underground island-style station, if the underground water content is large or the underground water is large, the side wall area is large, the water seepage is heavier, and there are many seepage points. In water-rich stratum, groundwater often seeps through the surface of the primary branch, and the water stoppage by grouting can achieve a certain effect, but can not completely solve the problem of water seepage, resulting in still water flow on the primary branch surface. [0003] This will seriously affect the construction and pouring quality. In the long-term construction practice, the applicant designed a waterproof technology for subsurface excavated station side walls in water-rich stratum, wh...

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Problems solved by technology

[0003] This can seriously affect construction and pouring quality

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