预应力锚杆锚固长度优化研究  

Optimization of bonding length of prestressed anchor

作　　者：罗涛[1,2] 卢宏建[3] 

机构地区：[1]北京科技大学,北京100083 [2]辽宁工程技术大学,辽宁阜新123000 [3]河北联合大学,河北唐山063009

出　　处：《化工矿物与加工》2013年第11期44-47,共4页Industrial Minerals & Processing

摘　　要：为了得到合理的预应力锚固长度,结合某隧道入口段坡体加固工程,通过对锚杆承载机理的分析,根据预应力锚杆在同一拉拔力作用下锚固段的切向位移越小锚杆的承载性能越好这一特性,给出了杆体切向位移的计算方法。然后设计现场试验方案,进行拉拔试验采集数据。最后对数据进行处理并利用SPSS统计软件回归分析,得出了工程加固方案预应力锚杆最佳锚固段长度为6m。Analysis of anchor loading mechanism was made to obtain the reasonable bonding length of prestressed anchor, with the example of slope reinforcement works of a tunnel entrance and the calculation method for anchor shear displacement was devel- opped on the basis of smaller shear displacement with better load- ing property of prestressed anchor under drawing force. The site test program was designed and the data of pull-out test was collect- ed and processed prior to being analyzed in regression by the statis- tical software of Statistical Program for Social Sciences. Thus, the optimum bonding length of prestressed anchor of engineering rein- foreement scheme was obtained in 6m.

关 键 词：预应力锚杆 锚固长度 优化 切向位移 SPSS 

分 类 号：TD353.6[矿业工程—矿井建设]