路堤段地基土的变形计算方法研究

基于摩尔-库伦本构模型以及分层总和法的基本理论，推导了路基下地基土的变形计算方法。基于MATLAB数值计算软件的程序编写，实现了依据不同土层参数的变形计算。结合益阳市东部新区外环路的路基工程，对勘测深度内处理后的路基下地基土进行变形计算分析。结果表明:对于处理后的地基土，勘测深度内总变形量为14.8631 mm。最大变形土层为粉质黏土层，总变形为6.8594 mm，占勘测深度内总变形的46.15%，占该土层厚度的0.21%。提高粉质黏土层强度可有效增加路基的稳定性和整体刚度。

Study on the Deformation Calculation Method of Foundation Soil in Embankment Section

Based on the Mohr-Coulomb model and the basic theory of layer-wise summation method, the deformation calculation method of foundation soil under subgrade was derived. According to the programming in the numerical calculation software MATLAB, the deformation calculation depending on the different parameters of multilayered soils was realized. Based on the subgrade engineering in Yiyang, in drilling depth, the analysis of deformation calculation for multilayered foundation soils under treated subgrade was done. It is shown that the total deformation is 14.863 1 mm for the treated subgrade. And the maximum deformation is 6.859 4 mm in silty clay, accounting for 46.15% of total deformation in drilling depth and 0.21% of the thickness of silty clay. Improving the strength of the silty clay can effectively increase the stability and the overall stiffness of subgrade.