可回收快锚扩体锚杆结构的提出及试验研究

我国是一个多地震国家，地震作用对基础设施的破坏尤为严重，为保护基础设施正常运营和人民财产安全，针对普通锚杆支护结构在地震作用下的不良表现及抢险救灾中不能快速形成锚固力的缺陷。文章结合可回收锚杆可重复利用的优点和扩大头锚杆的锚固优势，提出一种可快速形成锚固力、可重复利用、高承载力等特点于一体的新型锚固结构，并对其构造组成和工作机理进行探讨；结合现场试验对该结构承载能力进行分析验证，结果表明：该结构具有良好的承载能力，有利于保持边坡安全稳定，为该结构的推广应用提供了可靠依据。

Suggestion and experimental study on the structure ofretrievable quick underreamed ground anchor

As an earthquake-prone country, the earthquake damage to infrastructure in China is particularly serious. To protect the normal operation of infrastructure and the safety of people''s property, the bad performance of ordinary bolt supporting structures under earthquake and the defect that the anchoring force can not be formed quickly in rescue and disaster relief were concerned in this paper. Combined with the advantages of recycled bolt and enlarged head bolt, this paper put forward a novel anchoring structure. The proposed structure can form the anchoring force quickly, can be reused and has high bearing capacity. The structure composition and working mechanism were discussed, and the bearing capacity of the structure was analyzed and verified in combination with the in-situ test. The results show that the structure has good bearing capacity, which is conducive to maintaining the safety and stability of the slope. The study can provide a reliable basis for the application of the structure.