Study on Frame-Spring-Peripheral Foundation System Model for the Numerical Cross-section Analysis of Segments in Shield Tunnel

The lining structure of shield tunnel is composed of several segments and joints.In the analysis of the cross-section subjected to a definite external loading,beam-spring model is usually employed. The frame-spring-peripheral foundation system model is proposed to analyze the respond of external loading.This model has some advantages,like continuous ground reaction and impairment of joint stiffness.Furthermore,based on the example of the shield tunnel through Yangzi River,some valuable results are presented.