Research on safety impact of deep and large foundation pit construction on adjacent urban rail transit stations
This article studies the safety impact of different construction sequences of the foundation pits group on the main and auxiliary structures of the adjacent urban rail stations,by using finite element software to conduct three-dimensional simulation calculation and analysis in a construction project with deep and large foundation pits group around a certain urban rail station.After the construction is completed,the numerical calculation results are compared and confirmed with on-site monitoring data.The research results indicate that the impact of a single foundation pit on the surrounding environment is related to its excavation depth,the deeper the foundation pit,the severer the impact range.When the urban rail structure is within the impact synergistic area of different foundation pits,regardless of synchronous or staggered construction,the construction of the foundation pits group will produce a certain disturbance synergistic effect.Conversely,it is basically only affected by the construction of adjacent single foundation pits.The vertical displacement of the adjacent urban rail structure caused by the construction of the foundation pits group is mainly uplift,and the lateral displacement is towards the side of the foundation pits.Through analysis and research,it can provide guidance for the design and construction of similar projects in the future.
NETL
NSTL
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