分级加载时超固结粘土的一维非线性固结分析  

One-dimensional Nonlinear Consolidation Analysis on Over-consolidation Clay under the Stepped Time-dependent Loading

作　　者：宫志[1] 刘洋[1] 张秀凤[1] 

机构地区：[1]北京科技大学土木与环境工程学院土木系,北京100083

出　　处：《西北地震学报》2011年第B08期110-114,共5页Northwestern Seismological Journal

基　　金：国家自然科学基金(50808016)

摘　　要：采用土层孔隙比与固结压力和渗透系数之间的非线性经验模型,考虑天然饱和粘土的应力历史影响以及施工荷载分级加载的情况,建立了超固结饱和粘土的一维非线性固结控制方程,采用有限差分法离散求解了该方程,并编制了相应的计算程序;最后对考虑与不考虑超固结特性的饱和粘土一维非线性固结和线性固结的结果进行了比较分析。Using the nonlinear empirical models for relationship between the void ratio and both consolidation-pressure and coefficient of permeability,taking into account the effect of stress history of natural saturated clay and stepped time-dependent construction loading,the corresponding governing equations for one-dimensional nonlinear consolidation of over-consolidation saturated clay are proposed.The equations are dispersed using the finite difference method to facilitate solving them.The relevant computer program is developed to solve the equations.The results of one-dimensional nonlinear consolidation and linear consolidation of saturated over-consolidation clay are compared and analyzed.

关 键 词：一维非线性固结 超固结 有限差分法 分级荷载 

分 类 号：TU43[建筑科学—岩土工程]