扩孔锚杆应用于公路边坡支护的研究

扩孔锚杆属于岩土工程新技术，具有“延性破坏”特征、提高抗拔力、节约工程造价等优点。公路边坡支护均为永久性支护，普通锚杆受荷后不可避免出现注浆体开裂现象，采用端部承压式扩孔锚杆可有效地解决注浆体开裂及锚筋长期防腐问题。文中介绍扩孔锚杆的力学机理及端部承压式锚杆的施工方法，具体介绍扩孔技术应用于某高速公路边坡支护的工程案例，对扩孔锚杆技术在公路边坡支护推广应用、提高边坡支护水平具有重要意义。

Study on the Application of Broaching Anchor Bolt in Highway Side Slope

Broaching anchor bolt is a kind of new technique ofgeotechnical engineering. It has the advantages oftensile destroy, enhance anti pull force, save cost etc. Highway slope retaining are permanent support, ordinary bolt can not avoid cracking phenomena of grouting body, the pressure at the end of the type reaming anchor can effectively solve the grouting body cracking and the long-term anticorrosion problems. This paper introduces the anchor reaming dynamic mechanism and pressure type at the end of the construction method of bolt, introduces the engineering practice of some highway slope supporting project, which has an important meaning to enlarge hole anchor technique in highway slope application, and enhance the level of side slope retaining.