某高速公路软质岩缓倾顺层滑坡处治方案设计

Treatment Scheme Design of Flat Dipping Bedding Landslide of Soft Rock in an Expressway

缓倾顺层滑坡一般滑坡岩层倾角为几度至十几度,岩层倾角较小,勘察设计过程中不容易被重视。岩层面特性对边坡稳定性影响较大,在防护强度不足时,很容易在暴雨作用下导致雨水下渗软化岩层面,引起边坡滑动形成滑坡。以贵州省某运营高速公路滑坡为例,介绍了该类滑坡的滑坡特征、滑动情况及形成原因,并给出了两种处治措施。

Generally, the stratum dip angle of the flat dipping bedding landslide is small, being several degrees to more than ten degrees, so it is easy to be neglected in the process of survey and design. The characteristics of the rock stratum surface has a great impact on the slope stability, and when the protection strength is insufficient, it easily causes the rain infiltration to soften the rock stratum surface under the action of heavy rain, resulting in the landslide. Based on the landslide of an operational expressway in Guizhou Province, this paper introduces the characteristics, sliding situation and formation reasons of this type of landslide, and puts forward two treatment measures.