谷竹高速青峰滑坡成因分析及治理措施

摘要

以谷竹高速公路青峰滑坡为例，采用反演系数法和传递系数法计算了该滑坡的稳定性。结果表明：复杂的地形、工程地质条件、松散破碎的易滑地层、不利的软弱结构面等是滑坡形成的内因；引水隧道中水对边坡长期的渗流和对岩土体的软化作用是滑坡形成的外因。根据计算结果，采用削坡减载、抗滑挡墙、立体截排水和路基反压处理，取得了良好的效果。%Taking the landslide at the exit of Qingfeng along Gu-Zhu Highway as an example,inver-sion coefficient and transfer coefficient method was used to calculate the slope stability of the land-slide.The results show that the complex terrain,geological conditions,loose and broken easily slide formation and disadvantage of weak structural plane is the internal cause of landslide formation;Wa-ter in the water diversion tunnel on the slope seepage and long-term effect on softening of rock and soil mass is landslide formation of the external cause.According to the calculation results,the cutting slope and reducing load,anti-sliding retaining wall,and three-dimensional cutting back pressure drainage and roadbed treatment are adopted for comprehensive treatment,getting good effect.