论文部分内容阅读
利用室内周期循环加载试验 ,对黄河水下三角洲土体中孔隙水压力的变化加以测定 ,通过对波浪水槽试验和动三轴试验 2种方案所获数据分析认为黄河水下三角洲土体 (粉土、粘质粉土、粉质粘土 )存在一破坏的循环极限荷载。在小于此极限循环荷载作用情况下 ,土体中孔隙水压力总体呈现下降趋势 ,没有积累升高的过程 ,不同于砂土在循环荷载作用下孔隙水压力升高导致液化的情况。这一现象对判别黄河水下三角洲土体破坏机制的研究有重要意义。
The indoor cyclic cyclic loading test was used to measure the change of pore water pressure in the Yellow River subaqueous delta. According to the data obtained from the two schemes of the wave tank test and the dynamic triaxial test, the Yellow River subaqueous delta , Clay silt, silty clay) there is a destructive cyclic load limit. When the cyclic loading is less than this limit, the pore water pressure in the soil generally shows a downward trend, with no increase in accumulation. This is different from the situation where the pore water pressure increases due to the cyclic loading of the sand resulting in liquefaction. This phenomenon is of great significance for the study of the mechanism of soil damage in the Yellow River subaqueous delta.