Abstract:After performance-based supervisory control system of retaining pile deformation is established,pushover analysis is introduced into excavation monitoring of deep foundation pit. The performance level of retaining pile is divided into working well(WW),distinct crack(DC) and collapse prevention(CP). Lateral deformation data serve as reference values of target-generalized displacement. Plastic hinge property is obtained by elastoplastic method;and pushover analysis model adopts the beam on elastic foundation under normalized load. Step by step,elastoplastic pushover analysis is carried out under various construction steps;and pushover load increases from unit load to the ones that contain soil pressure in active zone and other load. With this,the relationships among load,lateral deformation and performance level are acquired. So the bearing behavior of retaining pile can be understood;and its succeeding displacement potential under certain real-time lateral displacement can be estimated from inclinometer. This method involves performance factors of materials,including destructive process and displacement capacity of retaining pile. The pushover analysis is based on nonlinear bar system finite element method for beam on elastic foundation. Three conceivable models of soil pressure are normalized to unit load to conduct pushover analysis. Details and processes of pushover analysis are presented in the end,including pushover load,pushover saving step and the termination condition of analysis. An engineering example from a project located in coastal soft soil area shows that the presented method is simple and reliable relatively;and it can be used for performance-based supervisory control of retaining pile deformation.