邻近深大建筑基坑的地铁基坑开挖变形特性研究OA

Aiming at the deformation control of metro foundation pit excavation adjacent to deep and large building foun-dation pits,the paper uses the three-dimensional finite element numerical simulation method to analyze the spatial deformation characteristics of the building caused by the excavation of the metro foundation pit under different construction conditions.The research shows that the adjacent closed foundation pit can effectively control soil displacement and significantly improve the safety of metro foundation pit construction.The horizon-tal displacement caused by metro foundation pit excavation will increase the stress risk of the adjacent base-ment,and protection measures such as strengthening the structural stiffness or setting up temporary supports should be taken.When the metro foundation pit is excavated after the building has been completed,uneven settlement is likely to occur.The design of the foundation pit support should be optimized and monitoring should be strengthened to control the settlement.