锚杆骨架梁支护红砂岩边坡机理分析

根据红砂岩边坡的工程地质及物理力学特性，分析了湘耒高速公路一失稳边坡的滑动型式．应用短锚杆骨架梁新方法对该失稳红砂岩边坡进行了支护，并采用带节理单元的三维有限元方法以及平面有限元方法对边坡应力应变分布和支护结构内力进行了分析计算．理论和3年营运实践表明，该支护方法对红砂岩等软岩边坡防护有较大的推广价值．

Mechanism Analysis for the Anchor Frame Beam Protecting Red Sandstone Slopes

According to the engineering geological characteristics and physical and mechanical characteristics of red sandstone side slopes, this paper analyzed the glide type of one unstable red sandstone slope in Xianglei expressway. A new type of short anchor frame beam was applied to protect the unstable red sandstone slope ,and three dimensional finite element of jointed rock slopes and surface finite element were adopted to calculate the stress and strain distribution of the slope and the internal force of the anchor structure. Both theoretical analysis and the Engineering example(XiangLei expressway has been put into use for three years) show that the protecting method is of great value to such softrock protection as red sandstone slopes.