Water supply system for open cut subway station construction and construction method

Abstract

The invention discloses a water supply system for open cut subway station construction and a construction method.The system comprises drainage blind pipes arranged in the height direction of a station, the drainage blind pipes are distributed on the outer side of an underground connecting wall of the station and used for collecting water on the outer side of the underground connecting wall of the station, and the adjacent drainage blind pipes are connected through guide pipes; the guide pipe is arranged in a top plate, a middle plate and / or a bottom plate used for being connected with an underground connecting wall of the station, and a connecting device is arranged at the joint of the drainage blind pipe and the guide pipe and can control whether water flows between the drainage blind pipe and the guide pipe or not.

Description

technical field [0001] The invention belongs to the field of rail transit engineering, and in particular relates to a water passage system and a construction method for the construction of open-cut subway stations Background technique [0002] With the rapid development of underground stations, the problems faced in the construction of stations also increase. The construction of the subway station will block the original groundwater seepage path, which will cause the local water level to rise, which will cause the surrounding structures to float up, and the subway station will also be biased by water pressure. Therefore, it is necessary to design a seepage station. [0003] Compared with the previous treatment method, the permeable gravel is used for seepage (the permeable gravel flows up and down on both sides of the underground diaphragm wall), and then a permeable channel is processed at the bottom of the station, so that the two sides of the station form a connector. pr...

AI Technical Summary

Problems solved by technology

The waterproofness of the enclosure structure has not been greatly utilized. When the groundwater seepage is too fast, the precipitation at the well point may not meet the seepage velocity of the groundwater (the groundwater may quickly enter the foundation pit)

[0005] Usually, the blind drainage pipe is placed inside the foundation pit, and the blind drainage pipe fits the enclosure structure. On the one hand, the blind drainage pipe can only guide the groundwater infiltrated into the foundation pit, and it only serves as a problem of precipitation in the foundation pit, and cannot improve the groundwater path. The problem of blocking; the second is that the blind drainage pipe is mainly attached to the enclosure structure, which cannot contact the soil layer well, cannot have a better water collection effect on groundwater, and is not easy to form a permeable subway station; the drainage device adopts Discharge by way of extraction, use of electricity and other issues, can not form an "automatic" cycle

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