Abstract: When tunneling,the disturbance induced by construction necessarily inevitably destroys the intrinsic stress and seepage balance of geotechnical material followed by,causing ground surface movement and deformation which affects safety of the ground construction and the normal operation of underground pipeline directly.This paper analyses and studies surface settlement from the angle perspective of fluid-solid coupling theory,addresses applies numerical simulation with FLAC3D,and compares the result of numerical simulation with the measured curves.