Shaking table test on the dynamic responses of shield tunnel in liquefiable stratum

Seismic liquefaction affects badly the safety of underground structures. For dynamic responses tunnel in liquefied watered sandy stratum one rail transit projects Shanghai, this paper proposes a tunnel-foundation shaking table model test and analyses electrolytic desaturation technology on surrounding soil, which provides some theoretical guidance for seismic designs Shanghai projects. The result shows that excess pore pressure ratio soil decreases gradually with increase buried depth; sand is easier to liquefy than silt so uplift during section should be paid more attention to; works significantly improving resistance abilities can effectively reduce damage caused by due liquefaction.