土中锚杆临界锚固长度的试验研究  

Test of Critical Anchorage Length of Anchored Bolt for Soil

作　　者：张福明[1] 梁仕发[2] 林大路[1] 赵健[1] 

机构地区：[1]总参工程兵科研三所,河南洛阳471023 [2]西安交通大学,陕西西安710049

出　　处：《煤矿开采》2015年第5期97-100,共4页Coal Mining Technology

基　　金：国家自然科学基金项目(51278492)

摘　　要：基于近几年来关于临界锚固长度理论,研究分析了黄土中拉力型和压力型锚杆临界锚固长度的试验条件、方法、结果和判别临界锚固长度的方法,并且与其他研究成果作了对比分析。结果表明,此次试验条件下拉力型和压力型锚杆临界锚固长度的存在和其长度,以及锚杆锚固段第一和第二界面局部破坏转移、峰值剪应力转移、零值剪应力转移大体是同时发生的,此时峰值和零值点间的空间距离就是临界锚固长度。Based on theories of critical anchorage length in recent years, test conditions, methods, results and judgment methods of critical anchorage length of tensing-and pressing-anchored bolt in loess was analyzed and compared. Results showed that local failure transformation, summit-value shearing stress transformation, zero-value shearing stress transformation were generally simultaneous. The space distance between summit value and zero-value was the critical anchorage length.

关 键 词：锚杆 临界锚固长度 判别方法 试验 研究 

分 类 号：TD350.1[矿业工程—矿井建设]