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风门凹滑坡在国道 3 2 4线粤西段约 15 0 km10 2个边坡当中 ,是变形破坏和造成灾害最严重的滑坡。滑体最大高度 4 7m,宽 170 m ,坡面 3 8°,呈多级阶梯地形 ,由全风化及强风化花岗片麻岩组成。其中的粘土矿物和片状矿物含量达 67% ,地下水作用强烈。根据滑坡的形成机制及其影响因素 ,本文提出抗滑桩连拱挡墙治理滑坡的方案。桩底穿过滑动面 4 m,桩及档墙高出地面 1.5 m,墙身设排水孔。墙背设地下水反滤层 ,路边排水沟内设垂直排水孔 ,坡面修三级平台和网格护坡 ,集中排除平台汇水 ,以达到抗滑护坡的目的。
Among the two slopes of about 150 km 2 in the west section of National Highway 3 2 4 Line, the Feng Shutan slide is the most deformed landslide causing deformation and damage. The maximum height of the slide body is 4 7m, width 170m, slope surface 3 8 °, was multi-level terrain, composed of fully weathered and strongly weathered granite gneiss. One of the clay minerals and flaky minerals content of 67%, strong groundwater. According to the formation mechanism of landslide and its influencing factors, this paper proposes a scheme of anti-slide piles with multiple retaining walls to control landslides. Bottom through the sliding surface 4 m, pile and file wall 1.5 m above the ground, the wall drainage holes. The back wall of groundwater is provided with an anti-filtration layer. Vertical drainage holes are arranged in the drainage ditches of the roadside. The three-level platform and the grid slope protection are repaired on the slope surface, and the centralized drainage of the platform is excluded to achieve the purpose of anti-skidding and slope protection.