THE DYNAMIC RESPONSE ANALYSIS OF INDEPENDENT FOUNDATIONS ON UNDERGROUND SHIELD TUNNEL CONSTRUCTION OF ADJACENT BUIDINGS

Tunnel construction may lead to ground deformation.So,in the preparation phase,its necessary to analysis the impact of the construction to surrounding buildings.This article taking shield tunnel construction crossing A Building for Beijing metro line 10 phase 2 as an example,conducted a numerical simulation research by FLAC3D.First,the building status is analyzed by measurement date,then,this article analyzed effects of ground settlement caused by shield tunnel construction on the buildings independent foundation based on numerical simulation,and it has predicted the trend of changes in soil-displacement-field and uneven settlement of the independent foundation,simulated the excavation of shield tunnel in different stages,and the dynamic response to the building foundation,forecasting the uneven settlement of foundation independence.This article analysis the construction scheme about isolation piles driving,and proposes an evaluation methodology that can be used by shield tunnel construction crossing independent foundation,when considering the influence of tunnel construction to structure foundation,Should considering the existing deformation and additional deformation caused by tunnel construction.In order to ensure the normal use of building,building deformation must be controlled in standard,in addition,this article can give references to the same kind of shield tunneling in the future.