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强风化软岩高边坡防护是当前研究的重要课题之一。针对厦蓉高速公路K113+250~K113+350段强风化软岩高边坡,提出根据不同坡率进行开挖的方案;基于对潜在滑体分条底部抗剪强度值的分析,确定边坡防护加固的重点部位;针对边坡存在浅层失稳,采用锚索(锚杆)框架梁的支护方案;考虑到锚索不能承受压应力,容易致使框架梁发生扭转变形而破坏,将底部第一级边坡设计成锚杆框架梁支护。运用数值分析软件对防护加固方案进行验证,通过对比加固前后滑体分条底部的抗剪强度值、总抵抗弯矩值和总抗力值,以及边坡的安全系数,验证了提出的防护加固方案是行之有效的。
Strong weathered soft rock slope protection is one of the important topics in current research. According to the strong weathering soft rock high slope of K113 + 250 ~ K113 + 350 of Xia Rong Expressway, a scheme of excavating according to different slope rates is put forward. Based on the analysis of the shear strength at the bottom of the potential slippery slope, the slope For the shallow instability of the slope, the support scheme of the frame beam of the anchor cable (anchor) is adopted. Considering that the anchor cable can not withstand the compressive stress, the frame beam will be easily deformed by torsion and deformation, and the bottom The first grade slope is designed as bolting frame beam support. By using numerical analysis software to verify the scheme of reinforcement and reinforcement, the proposed reinforcement scheme is verified by comparing the shear strength, total resistance and total resistance, and the safety factor of the slope before and after reinforcement Is effective.