桂柳高速公路边坡病害特征及主控因素的研究

Research on distribution characteristics of transform andbreakage and main controlling factors inGuilin-Liuzhou expressway

桂柳高速公路K380～K450路段内,边坡变形破坏的分布特点与其所处的特殊地形地貌、地质环境、气候条件及人类活动因素有关。本文运用数理统计方法对边坡变形破坏分布规律及控制因素进行了分析,并建立了滑坡滑带土的综合内摩擦角与滑坡坡度的经验公式,该公式对类似地区边坡开挖及防护具有一定的指导意义。

Along the section of K380～K450 of Guilin-Liuzhou expressway, there are 53 landslides, 14 collapses and 16 desquamations through surveying, mean density of 1.6 spots/km, with a total volume of 56.24×10^(-4) m^3, with the character of small volume and large disaster, and distribution character of the deformation and failure is due to the special landform, geological environment, climate and human activities. Mathematical statistics method is used to analyze the regularities of distribution and controlling factors of the slope deformation and failure, and the empirical equation is also brought up, which is about angle of comprehensive internal friction of the soil in the slip zone and the gradient of landslide. The equation has a guiding use for slope excavation and treatment in similar zone.