多根锚杆抗拔力折减系数研究

 

邓  坤，李  刚，王治强

（ 陕西省高速公路建设集团太凤高速公路建设管理处, 陕西 西安710065）

摘  要：自旋锚杆是一种新型锚杆，通常单根锚杆抗拔力无法满足实际工程要求，需要多根锚杆共同承担，因此要考虑群锚效应对单根锚杆锚固力进行折减。针对不同锚杆间距、不同性质的岩体进行分析，拟合出多根锚杆抗拔力的折减系数。

关键词：多根锚杆；抗拔力；折减系数

中图分类号：U455        文献标识码：A

 

Study on the Coefficient of Drag Reduction of Multiple Anchors

DENG Kun，LI Gang，WANG Zhi-qiang

(Shaanxi Provincial Expressway Construction Group Corporation , Xi’an 710065，China)

Abstract: The spinning anchor bolt is a new kind of anchor bolt, but a single anchor bolts withdrawal resistance couldt satisfy the request of practical projects and need multiple anchor bolt work together So the single anchor bolts anchoring force should be reduced to consider the anchors group effect The anchors group effect was analyzed and the reduction coefficient of group anchor bolt was fitted in view of different anchor bolt spacing and different nature of rock mass in this paper.

key words: multiple anchor bolt；withdrawal resistance；reduction coefficient