An analytical method for internal forces in DOT shield-driven tunnel

摘要

This paper presents an analytical solution for the determination of internal forces of a jointed segmentsl precast DOT (Double-O-tube) lining. The unbalanced force transition method is combined with force method to establish an efficient analytical shortcut that simplifies tests and obtains the solution more effective than the existing methods to determine internal forces in the DOT tunnel lining. The in situ test on a DOT tunnel and a numerical simulation by FEM are conducted to verify the proposed analytical solution. The effects of shoulder ground pressure, soil resistance coefficient and open angle of DOT tunnel on the performance of tunnel lining are discussed as well.