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Supporting Characteristics of a Spiral Bolt through Pull-out Test  

Kim, Jang-Won ((주)강동산업)
Kang, Choo-Won (조선대학교 에너지자원공학과)
Song, Ha-Lim (조선대학교 에너지자원공학과)
Publication Information
Explosives and Blasting / v.29, no.1, 2011 , pp. 10-16 More about this Journal
Abstract
To make large slopes or rock structures stable, supporting systems, such as anchor bolt, rock bolt and spiral bolt which are developed recently, are commonly used. In this study, in-situ pull-out tests were carried out to compare the characteristics of rock bolt that is most widely used with ones of spiral bolt that is newly developed. Re-pull-out test for the spiral bolt in which loading and unloading cycles are repeated three times showed that the maximum pull-out load is almost constant irrespective of the number of loading cycles, which may be due to no failure between spiral bolt and filler. On the other hand, the maximum pull-out load for the conventional rock bolt decreases with the number of loading cycles due to the partial failure between rock bolt and filler.
Keywords
Spiral bolt; Rock bolt; Pull-out test; Re-pull-out test; Maximum pull-out load;
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  • Reference
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