Deformation law of deep excavation in metro interchange station

Taking deep excavation engineering of North Station on the second line of Xi'an Subway as an example,the plane design of in-situ monitoring of deep excavation retaining structure has completed,and the emphasis is given to analyze the deformation laws of the retaining piles and,tension force of the cables and the force of steel support.The results show that the deformation of pile-wall's,especially the deformation of pile top is related to the deformation situation of supporting structure and can directly reflect the deformation characteristics of supporting structure,which is the important criterion of the safety of condition of supporting structure.The steel support is useful to restrict the deformation of the excavation.