Subway station water blocking structure for protecting underground water environment and construction method of subway station water blocking structure

Abstract

The invention relates to the electrified railway technology, in particular to a subway station water blocking structure for protecting the underground water environment and a construction method of the subway station water blocking structure. The water blocking structure comprises a V-shaped frozen earth water blocking layer, wherein two vertical frozen earth walls are arranged in the space defined by the V-shaped frozen earth water blocking layer, and the vertical frozen earth walls are communicated with the V-shaped frozen earth water blocking layer. By means of the V-shaped frozen earth water blocking layer, external underground water is prevented from entering a station foundation pit; the vertical frozen earth walls are used for supporting the stability of soil bodies on the two sides of the station foundation pit, protecting the underground water environment and preventing the underground water from being polluted in the construction process. By means of the freezing water blocking structure, large-scale drainage construction is avoided, precious underground water resources are saved, and settlement deformation, caused by drainage construction, of nearby buildings and structures are avoided.

Description

technical field [0001] The invention relates to electrified railway technology, in particular to a subway station water stop structure and a construction method for protecting the groundwater environment. Background technique [0002] For subway construction in water-rich areas, when the underground excavation method is used for subway tunnel construction, it is the basic work before tunnel excavation to use water stop or drainage to treat groundwater within the tunnel excavation range. At present, the water stop of subway tunnels in my country generally adopts grouting water stop or rotary grouting pile water stop. These two water stop methods need to inject cement slurry into the soil layer, which will pollute the water quality of groundwater. At the same time, the flow direction of cement slurry is not easy to control, and it is easy to block groundwater. The seepage channel changes the seepage path of groundwater. However, if the drainage scheme is adopted, precious grou...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a subway station water stop structure and construction method for protecting the groundwater environment, so as to solve the problems of groundwater pollution and protection of groundwater resources during tunnel construction.

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