公路膨胀土路基的沉降和边坡稳定性研究

Study on the Settlement and Slope Stability of Highway Expansive Soil Subgrade

为了提高膨胀土公路路基项目设计水平,论文总结了膨胀土的基本特性及分类方法,分析了膨胀土路基的沉降特性,边坡稳定性的定性和定量计算方法及膨胀率法、分层总和法、有限元法等在路基沉降计算中的应用,以某高速公路膨胀土路基为研究对象,通过软件FLAC3D5.0建立计算模型,得到了不同降雨历时条件下膨胀土路基边坡安全系数的变化规律。

In order to improve the design level of expansive soil highway subgrade project,the basic characteristics and classification methods of expansive soil are summarized;the settlement characteristics of expansive soil subgrade,the qualitative and quantitative calculation methods of slope stability and the application of expansion rate method,layered summation method and finite element method in the calculation of subgrade settlement under equal loads are analyzed.Finally,taking the expansive soil subgrade of an expressway as the research object,the calculation model is established through the software FLAC3D5.0,and the variation law of the safety factor of the expansive soil subgrade slope under different rainfall duration is obtained.