Dewatering method used for improving surging-resisting stability of confined water stratum foundation pit
A technology for confined aquifer and confined water, which is applied in infrastructure engineering, construction, etc., can solve the problems of reducing the depth of the confined water level and increasing the weight of the overlying aquifer on the confined aquifer.
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[0055] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0056] Example:
[0057] The transfer section of a subway station is 285.2m long, 43.7m wide, and has an area of about 12463.24m 2 , The maximum excavation depth of the foundation pit is about 25m, and the surrounding environment is complicated. The main envelope structure of the station adopts an 800mm / 1000mm thick underground continuous wall without blocking the confined aquifer, which is a suspended water-stop curtain. The profile of the foundation pit is as figure 1 Shown. The foundation pit is located in the floodplain area of the Yangtze River in Nanjing. The site has a typical dual geological structure of the Yangtze River floodplain.
[0058] This embodiment provides a precipitation method for increasing the anti-surge stability of foundation pits in confined water formations. The method includes the following steps:
[0059] The first step is to obt...
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