高速公路大粒径泥石路基的稳定性设计及应用研究

Study on Stability Design and Application of Large Particle Mudstone Subgrade of Expressway

结合成宜高速公路工程分析四川山区经历过重大地震并伴有泥石流灾害的复杂先天环境现状。通过对路基用料、土体压实特性分析实验、加州承载比实验等方法设计高稳定性大粒径泥石路基。应用优化后的路基材料后,测试地区公路稳定性明显提升,未出现严重移位或变形,表明该设计方案具有显著的工程价值和实践意义。

Combined with the expressway project from Chengdu to Yibin,this paper analyzes the complex congenital environment of Sichuan mountainous area which has experienced major earthquakes and accompanied by debris flow disaster.The high stability and large particle size mudstone roadbed is designed by analyzing the materials used in roadbed,soil compaction characteristics and California load ratio test.After the application of the optimized subgrade material,the stability of the road in the test area is obviously improved,and no serious displacement or deformation occurs,indicating that the design scheme has significant engineering value and practical significance.