砂土液化动稳态强度分析

根据动三轴实验数据，砂土的应力路径最终达到一个稳定的阶段，此时，在不同的振动周期，砂土的孔隙水压幅值不再增加，应力路径相互重叠，但是应变幅值却以恒定的速率不断增加，这种相对稳定状态中的极限强度是评估砂土抗液化能力的重要指标，并结合饱和砂土的孔隙水压力发展和应力路径，使砂土液化强度更加明了。

STUDY ON DYNAMIC STEADY STATE STRENGTH OF SAND SOIL LIQUEFACTION

According to the dynamic triaxial test of sand, there is a steady state at the last phase of the development of strain and stress path. In different cycle of this phase, the stress paths superpose with each other, but the axial strain tends to a steady rate. The strength of the sand in this phase is studied because it is an important parameter to evaluate the stability of sand soil liquefaction. Considering the strength developed with stress path, the mechanism of saturated sand liquefaction seems more clear.