Finite element analysis of impact of under-crossing of large shallow shield tunnel on riverbank

Based on the tunnel project of Jiangyin West Chengjiang Road, the impact of undercrossing of large shallow shield tunnel on the riverbank is analyzed by using the Gleaves finite element software. The subroutine of displacement control of finite element method (DCM) is established in the software based on the ground loss ratio. The analysis results show that the settlement of riverbank varies largely with different ground loss ratios under small overburden. The ground loss ratio should be controlled within 1% for the safety of the riverbank. The in-situ monitoring results show that the largest settlement of riverbank is 12 mm after crossing of shield tunnel. Good control effect is achieved and the safety of the riverbank is ensured .