Abstract: Currently, there are limited research results on high slopes with very thin weak interlayers and daylighting bedded rocks. Based on a sudden landslide in Baiyi Town, Wudang District, Guiyang City, this article uses numerical simulation methods to analyze the stability and prevention measures of daylight bedded rock slopes with extremely thin weak interlayers and detailed geological survey data. Research results show that the deformation mechanism of such slopes is slip tensile failure, and the extremely thin weak interlayers are the main reason for the slope sliding. Compared with the displacement of the slope under three different working conditions, it is concluded this type of slope experiences significant deformation and failure under both natural and water saturated conditions. In addition, based on the analysis of the deformation mechanism and the stability of the slope, a protective measure mainly consisting of the concept of “clearing the slope + slope toe protection” was proposed. Throughout the modeling and simulation analysis, it was found that such protective measures have a good protective effect on this type of slope.

Key words: Extremely Thin Layers, Weak Interlayer, Daylighting Bedded Rock Slope, Stability, Mitigation Measures