The optimal design of soldier pile system in deep excavation

Timoshenko beam elements and linear torsional elements are adopted for the ring beam,nonlinear FEM based on Winkler model is used for the soldier pile,then the effect of ring beam is analyzed under the continuous deformation condition. The optimal design parameters are the position of struts, the depth of every excavation step as well as the size of ring beam, which are solved by the complex method based on the minimum pile deformation and optimization strategy presented in the paper.An integrate optimal system is formulated in this paper.