双层地基的变形与沉降

通过对工程实例的有限元分析及离心机模型试验，研究了有效弱下卧层的双层体系地基的变形特性，以及土层厚度及模最对变形沉降的影响。

Deformation and Settlement of Double-layer Subgrade

In this paper, the characteristics of a double-layer subgrade with a very soft underlayer, and the effects of the thickness and the modulus of soil on the settlement are studied by using a group of centrifuge model tests and the analysis of some case histories with F.E.M.The thicker the bearing layer thickness and the bigger the modulus as well as the smaller the ratio of modulus with the underlayer, the smaller the settlement will be. The key factor to affect the accuracy of F.E.M. analysis is the simulation of the variation of pore water in the subgrade.