汶川～马尔康高速公路高陡边坡地质灾害调查及防治

Investigation and Prevention of Geological Hazards for High-steep Slope of the Wenchuan to Maerkang Expressway

汶川~马尔康高速公路顺深切峡谷两侧布线,河谷两侧边坡高陡,高位地质灾害发育。沿线高陡边坡地质灾害调查分析表明,汶川~朴头段是高位,岩土体失稳主要形式有岩体变形、剥蚀及溯源侵蚀、滑移、倾倒、坠落等,高陡斜坡地形条件、干旱河谷气候、陡倾似层状坡体结构、高烈度地震环境,是灾害发展演化的主要影响因素。灾害防治主要采取绕避、明洞、桥上柔性棚洞、拦挡、主动加固等综合防治措施。

The alignment of the Wenchuan to Maerkang Expressway is along the deep gorge,with high and steep slope on both sides and geological disasters developed.The investigation and analysis of geological disasters show that is the most developed section of high-position geological disaster is from Wenchuan to Putou.The main forms of rock and soil instability include rock deformation,erosion and retrogressive erosion,slipping,toppling and falling.High steep slope terrain conditions,dry valley climate,steep dip layered slope structure,high intensity seismic environment are the main factors affecting the development and evolution of disasters,as such the integrated prevention and control measures are detouring,open and cut tunnel,flexible shed tunnel on the bridge,block engineering,and active reinforcement etc.