强风化高陡路堑边坡综合加固方案研究

Research on Comprehensive Reinforcement Scheme for Strong-weathered High and Steep Cutting slope

以重庆某高速公路强风化岩体高陡路堑边坡为依托,运用FLAC3D程序和MohrCoulomb准则,从边坡塑性区剪应变、水平位移、稳定安全系数三个方面,对采用坡底增设钢筋混凝土挡墙、锚杆注浆支护+挡墙、挂网喷射混凝土+锚杆注浆支护+挡墙的3种加固方案后边坡的稳定性进行了分析。研究结果表明,采用3种加固方案后,边坡的剪应变和水平位移依次减少,稳定安全系数依次提高,挂网喷射混凝土+锚杆注浆支护+挡墙加固方案的稳定安全系数满足规范要求。

Replying on the strong-weathered high and steep cutting slope of an expressway in Chongqing,the FLAC3 D procedure and Mohr-Coulomb rules are adopted to analyze the stability of slope reinforced by three schemes（ adding concrete retaining wall at the slope bottom,anchor rod grouting support ＋ retaining wall,wire netting sprayed concrete ＋ anchor rod grouting support ＋ retaining wall） from three aspects（ shearing strain,horizontal displacement and buckling safety factor in slope plastic zone）. The research results show that after reinforcement by three schemes（ adding concrete retaining wall at the slope bottom,anchor rod grouting support ＋ retaining wall,wire netting sprayed concrete ＋ anchor rod grouting support ＋ retaining wall）,the shear strain and horizontal displacement of slope are decreasing successively,while the buckling safety factor is increasing successively. Finally the buckling safety factor of scheme（ wire netting sprayed concrete ＋ anchor rod grouting support ＋ retaining wall） meets the specification requirements.