正常固结软土渗透系数与固结应力关系研究

从固结系数的定义出发，将压缩系数视为变量，建立了渗透系数与固结应力的微分方程，求得了软土正常固结状态时，考虑前期固结压力的渗透系数随固结应力变化关系表达式。利用室内试验数据，将提出的公式与现有渗透系数与固结应力关系式、试验结果进行对比。研究表明，所提出的公式能较好地反映渗透系数随固结应力变化的特点，比未考虑前期固结压力的计算式更接近于实际情况，从而为实际工程中预估固结变形速率提供了一种较为准确的方法。

Research on relationship between permeability coefficient and consolidation stress of normal consolidation clay

Considering the compressibility coefficient as a variable, a differential equation about the permeability coefficient and consolidation stress is established based on the definition of consolidation coefficient, thus an expression of the relationship between permeability coefficient and consolidation stress involved with previous consolidation pressure is deduced for normal consolidated soft clay. Using experimental data, the presented expression is compared with the existing solutions and the test results. The research shows that the proposed expression can well reflect the characteristics of permeability coefficient with the variation of consolidation stress and is more approximate to the practice than those solutions without considering previous consolidation pressure. It will provide a more accurate method when predicting the rate of consolidated deformation in engineering practice.