Research on the Construction of Multi Layered Pressure Water Dewatering for Subway Ultra Deep Vertical Shaft Crossing Under Complex Conditions
Groundwater is an important control factor for the safety of underground excavation construction.This article took the construction of a large cross-section ultra deep vertical shaft in the starting section of Beijing Subway Line X as the engineering background.Through the comparison of vertical well groundwater treatment schemes,simulation of vertical well precipitation schemes,and the establishment of a two-dimensional unstable seepage finite numerical model of groundwater in a multi-layer dense aquifer group,reasonable design parameters such as well position,well structure,and number of wells were proposed based on the above.In addition,taking precipitation construction as the research object,a zoning evaluation of precipitation disturbance deformation was carried out,and a three-dimensional geological numerical analysis model was established.Under the premise of ensuring the effectiveness of precipitation,the impact of precipitation on the settlement law and safety of adjacent existing structures was studied.
multi layered dense aquifertwo-dimensional unstable seepagedisturbance deformationnumerical simulationsettlement law
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