塑性流动失稳破坏是由孔隙水压力的累积作用起主导作用；
Plastic flow failure is mainly induced by building up of excess-static pore pressure.
地震作用导致岩体变形破坏的主要机制是剪应力积聚和超静孔隙水压力累积效应的耦合作用。
Essentially the main mechanism of deformation and failure of rock mass induced by earthquake is the coupling effect of shear stress and excess static pore water pressure accumulation.
通过计算分析可以发现：随着土的变形模量和泊松比的减小，由地震所引起的海床中的累积超孔隙水压力均增大。
By computations and analysis it is found that the seismic-induced accumulative pore water pressures of seabed increase with the values of soil deformation modulus and Passion's ratio decreasing.
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