Reinforcement of rock mass with cross-flaws using rock bolt

被引：44
|
作者：
Zhang, Bo [1 ,2 ]
Li, Shucai [1 ,3 ]
Xia, Kaiwen [4 ,5 ]
Yang, Xueying [6 ]
Zhang, Dunfu [1 ]
Wang, Shugang [7 ]
Zhu, Jianbo [8 ]
机构：
[1] Shandong Univ, Sch Civil Engn, Jinan 250061, Shandong, Peoples R China
[2] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
[3] Shandong Univ, Res Ctr Geotech & Struct Engn, Jinan 250061, Shandong, Peoples R China
[4] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada
[5] Univ Toronto, Lassonde Inst, Toronto, ON M5S 1A4, Canada
[6] Shandong Urban Construct Vocat Coll, Jinan 250014, Shandong, Peoples R China
[7] Penn State Univ, Ctr & Energy Inst G3, Dept Energy & Mineral Engn, University Pk, PA 16802 USA
[8] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
来源：
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2016年 / 51卷
基金：
中国国家自然科学基金;
关键词：
Reinforcement; Rock bolt; Rock mass; Cross-flaws; STRENGTH; BEHAVIOR; ROCKBOLTS;
D O I：
10.1016/j.tust.2015.10.007
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Rock bolting is one of the most effective and economical means of rock mass reinforcement. Existing studies of rock bolt reinforcement are mostly focused on rock masses without flaw, with a single flaw, or with parallel flaws. However in rock masses, cracks or flaws usually exist in the form of cross-flaws. In order to understand the impact of cross-flaws on rock bolt reinforcement and to further explore the differences of bolt reinforcement between rock mass with cross-flaws and rock mass with a single flaw, reinforced analog specimens with cross-flaws and with a single flaw were tested under uniaxial compressive condition. The experimental results show that the uniaxial compressive strength of the reinforced rock mass with cross-flaws in this research is higher than that of reinforced rock mass with a single flaw. This observation can be explained by the difference in the failure modes of reinforced specimens: the reinforced rock masses with a single flaw fail due to the formation of a shear crack while reinforced rock masses with cross-flaws fail as a result of a tensile fracture or interaction between tensile fracture and shear fracture. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：346 / 353
页数：8
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