饱和软粘土在循环荷载下的孔压数值分析

The Pore Pressure's Numerical Analysis for Saturated Soft Clay Under Cyclic Loading

在经典的Terzaghi一维固结理论基础上,推导出循环荷载作用下考虑土体非线性的一维固结微分方程,并应用Matlab软件编写相应微分方程的求解程序,得到超孔隙水压力随时间变化的曲线。结合单层地基在正弦循环荷载形式作用下的固结算例,对所得数值解进行了探讨,揭示了循环荷载作用下单层饱和软粘土地基孔压分布的特性,得到了一些有益于工程实践的有意义的结论。

The one-dimensional nonlinear consolidation partial differential equation under arbitrary loading is deduced on the basis of classical Terzaghi one-dimension consolidation theory. With the tool of Matlab, the equation is solved and the u-t curves are also obtained. By analyzing the solution of equation, some characters of one-dimensional nonlinear consolidation of saturated soft clay under cyclic loads are explored, some useful results obtained from sinusoidal cyclic load are illustrated, which are meaningful to engineering practice.