汤岳飞  冯紫良  林  翰  陈  欣
    （同济大学地下建筑与工程系  上海 200092）

[提要]  在室内流变试验的基础上，拟合出了一种半经验半理论型的非线性流变的计算公式，该公式具有概念简明、便于编程等特点。饱和软粘土在变形过程中流变变形与固结变形是相互耦合在一起的，从耦合的角度出发，将Biot固结理论应用到饱和软粘土的非线性流变分析，并在此基础上，编制了相应的有限元程序。最后，用工程实例分析了软土工程土体的流变性态，得出了一些有益的结论。
[关键词] Biot固结 非线性流变 饱和土 有限元

Based on the analysis of the theologic lab test on saturated soft clays, the dissertation generalizes a new 2D nonlinear theologic numerical analysis formula. The method for calculating deformation in saturated clays is presented on the basis of coupling theology with consolidation, besides the 2D-FEM program has been developed. At last, a practical braced cut engineering is analyzed, and suggestions concerning design and construction are made.
Keywords: Biot  consolidation; nonlinear  theology; saturated  clays; FEM; coupling analysis