查看文章

Most of the traditional design methods assumed shield tunnel lining as a perfectly formed ring, without special attention to the effect of pre-deformations and inaccuracies produced in the assembling process before the segmental ring is closed. However, these factors can significantly affect the mechanical performance and durability of the tunnel. To make up for the deficiencies of conventional design models, we contributed a new method to evaluate the internal forces of tunnel lining produced in the assembly, in which the key idea is to appropriately assume the assembly tolerance of bolt holes and pre-deformations of the lining ring. By applying the principle of minimum potential energy, analytical solutions for three cases (ALS-FF, ALS-FC, ALS-CC) were developed to determine the internal forces of segments produced in the assembly process. Then, an in-situ measurement was conducted to validate the method …