山岭高速不良地质边坡三级压力分散锚索施工技术

Construction Technology of Three-level Stress Dispersed Anchorage Cables for Poor Geology Slopes on Mountainous Highways

摘要:

山岭高速公路不良地质边坡岩体破碎、稳定性差,传统拉力型锚索存在应力集中、耐久性不足等短板,难以满足长期防护要求。文章以昭普高速特兹3号隧道进口边坡工程为依托,针对三级压力分散锚索施工工序复杂、组装精度要求高等特点,提出了分级下料精准组装、裂隙岩体防串孔注浆、分级张拉均匀受力等关键施工技术,构建了全过程质量安全管控体系。工程实践表明,该技术可有效提升锚索锚固可靠性与结构耐久性,控制边坡变形,为同类山岭高速不良地质边坡防护施工提供了可行的技术参考。

Abstract:

The rock mass of the poor geological slope of the mountainous expressway is broken and has poor stability. Traditional tension type anchor cables have shortcomings such as stress concentration and insufficient durability, which are difficult to meet long-term protection requirements. The article is based on the entrance slope project of the Tianzi No. 3 Tunnel on the Zhaopu Expressway. In response to the complex construction process and high assembly accuracy requirements of the three-level pressure dispersed anchor cable, key construction technologies such as graded cutting and precise assembly, anti perforation grouting in fractured rock mass, and graded tensioning and uniform force distribution have been developed, and a full process quality and safety control system has been established. Engineering practice has shown that this technology can effectively improve the reliability and structural durability of anchor cable anchoring, control slope deformation, and provide feasible technical references for the protection construction of similar mountain high-speed adverse geological slopes.