循环荷载条件下海洋饱和软土动力性质分析

Dynamic characteristics analysis of marine saturated soft soil under cyclic loading

选用沿海地区的原状和重塑软黏土,在3种固结比及不同加载频率条件下进行动力实验,讨论两种饱和软黏土在循环荷载作用下的剪切状态及土体抗剪强度等动力特性。实验结果显示,在不同超固结比情况下,重塑软黏土呈现应变软化形状;加载频率发生变化情况下,原状软黏土的不排水抗剪强度明显高于重塑软黏土,通过上述实验可以有效了解海洋软性饱和黏土的破坏程度及土壤破坏标准,对沿海地区建筑物的设计与施工具有重要理论价值及实际指导意义。

The original state and remolded soft clay in coastal areas were selected, and the dynamic experiments were carried out under three kinds of consolidation ratios and different loading frequencies. The shear state and shear strength of two saturated soft clays under cyclic loading were discussed. Equal dynamic characteristics. The experimental results show that the remolded soft clay exhibits strain-softening shape under different over-consolidation ratios; the undrained shear strength of undisturbed soft clay is signifcantly higher than that of reshaped soft clay under the change of loading frequency. Effective understanding of the degree of damage of marine soft saturated clay and soil destruction standards has important theoretical and practical guiding signifcance for the design and construction of buildings in coastal areas.