膨胀土处治技术在高速公路路基中的工程应用

Technology for the Treatment of Expanive Soil in Express Highway's Roadbed

分析总结了国内外膨胀土在公路建设工程中的主要处治方法,针对我省常德—张家界(下称“常张”)高速公路膨胀土的性质特点,提出了在常张路路基施工时采用“铺设土工膜、掺生石灰、加筋”三种具体的膨胀土处理措施,通过施工现场三个试验路段一年多的实际观测结果显示:三个试验路段没有发生任何破坏形式,说明处理措施取得良好的效果,这对工程建设中的膨胀土处理问题具有一定的指导作用.

Based upon comprehensive analysis and comparison of the main methods which were applied within china and abroad to treat expansive soil in highway construction, and the characters of expansive soil in Changde-Zhangjiajie express highway ＇ s roadbed, three practical methods ：laying earth-work film, mixing calcined lime, and adding fibs, were adopted in this highway construction project. After one and a half years of test and observation, no defects or broken places were found in three trial sections of the highway. It has been proven that the methods are very effective and can been applied in other similar construation project.