基于破坏接近度的深基坑稳定性研究OA北大核心CSTPCD

To investigate the deformation and failure patterns of deep foundation pit during the excavation process and quantitatively assess the safety of the excavation,the stress state of the excavation soil was analyzed using FLAC3D software and the failure approach index(FAI)theory.This analysis quantified the extent and range of damage to the surrounding soil of the excavation.The results indicate that the deformation of the retaining piles around the excavation exhibits a"small at both ends,large in the middle"characteristic,while the ground surface settlement deformation presents a"trough"shape.The failure approach index can intuitively reflect the degree of damage and evolutionary patterns of the rock and soil masses during excavation,quantifying the impact scope of excavation construction.The research conclusions provide a theoretical reference for quantifying the risk of foundation pit construction.