南友路膨胀土堑坡滑坍的地质调查与思考

Geological Investigation and Reflection on the Expansive Soil in Nanning-Youyiguan Highway

针对广西南友高速公路膨胀土路堑边坡开挖中出现的大量滑坡问题,进行了详细的现场工程地质调查,并对其产生原因逐个进行了勘察分析.同时,结合室内土性实验,全面分析了南友路膨胀土的土性特征、路堑边坡的工程地质特性和影响路堑边坡稳定性的各种因素等.在此基础上,思考并探讨了可行的膨胀土路堑边坡处治方法,提出采用土工格栅加筋、柔性挡土墙处治膨胀土路堑边坡的新技术,以促进南友路的顺利修建和膨胀土处治工程技术进步.

In the light of a lot of landslide of the expansive soil occurred on Nanning-Youyiguan Highway in (Guangxi), a detailed geologic investigation has been adopted to analyse the landslide. The factors affecting stability of cut slope have been carefully analysed and some feasible techniques for landslide protection in expansive soil slope explored. The new method of treatment with flexible retaining wall reinforced by geotextile has been put forward for Nanning-Youyiguan Highway construction.