山区高速公路反倾板岩边坡失稳影响因素分析及滑坡处治方案

Analysis of Factors Influencing the Instability of Anti-dip Slate Slope of Highways in Mountainous Areas and Landslide Treatment Scheme

板岩在我国分布较为广泛,高速公路建设过程中板岩边坡失稳情况频发.通过对官新高速板岩边坡失稳情况进行分析,总结出板岩边坡失稳的主要影响因素,即不利地形、板岩节理影响下的力学特性、降雨入渗影响和边坡开挖过程临时防护措施薄弱.最后提出削方减载+锚索锚杆防护+微型桩加固的处治方案,对板岩边坡设计及板岩滑坡处治具有一定参考价值.

Slate is widely distributed in China and the slate slope is unstable during the construction of the highway.Through the analysis of the instability of the slate slope of the Guanxin Highway,the main factors influencing the instability of the slate slope are summarized,that is,the unfavorable topography,mechanical characteristics under the influence of slate joints,the impact of rainfall infiltration and the weakness of temporary measures for the slope excavation.The treatment scheme of deloading through rock and soil removal+anchor rod and anchor cable+micro pile reinforcement is proposed,which will provide certain reference value for the design of slate slopes and the treatment of slate landslide.