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为了研究长期循环压缩荷载作用下饱和软黏土的变形性状,对珠江三角洲的典型饱和软黏土进行了室内循环三轴压缩试验,着重研究了饱和软黏土的累积应变速率特性。试验结果表明:初始静偏应力与动偏应力的耦合作用以及不同的排水条件对软黏土累积应变速率有较大的影响;在长期循环压缩荷载作用下,软黏土的累积应变速率随循环次数的增大而减小,应变速率对数与循环次数对数间的关系可用直线描述。
In order to study the deformation behavior of saturated soft clay under long-term cyclic compressive loading, the indoor saturated cyclic triaxial compression tests were carried out on the typical saturated soft clay in the Pearl River Delta. The cumulative strain rate characteristics of saturated soft clay were studied. The experimental results show that the coupling effect of initial static deviatoric stress and deviatoric stress and the different drainage conditions have a great influence on the cumulative strain rate of soft clay. Under long-term cyclic compressive loading, the cumulative strain rate of soft clay varies with the number of cycles Increase and decrease, the relationship between the logarithm of strain rate and the number of cycles can be described by a straight line.