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http://dx.doi.org/10.9711/KTAJ.2010.12.1.061

Study on evaluation of bond strength of cone-shaped button cablebolt  

Choi, Jung-In (건국대학교 사회환경시스템공학과)
Kim, Won-Keun (건국대학교 사회환경시스템공학과)
Lee, Dong-Seok (건국대학교 사회환경시스템공학과)
Lee, Seok-Won (건국대학교 사회환경시스템공학과)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.12, no.1, 2010 , pp. 61-73 More about this Journal
Abstract
The cablebolt which secures a workability and stability has been used in foreign countries as one of supporting materials with rebar rockbolt especially in construction of large underground structures. However, only the rebar rockbolt has been applied up to now to all the constructions of underground structures in Korea due to an absence of recognition of cablebolt and large underground structure projects. Consequently, the research for a performance evaluation and verification of cablebolt is very limited and only the proto-type field tests have been conducted. In this study, the cone-shaped button cablebolt is developed by modifying an existing button cablebolt. To evaluate a performance and applicability of cone-shaped button cablebolt, the laboratory pull tests are conducted and bond capacity is analyzed under a various conditions. The rebar rockbolt, plane cablebolt, and bulb cablebolt which has a similar mechanical behavior with cone-shaped button cablebolt, are also tested and their bond capacities are evaluated and compared with cone-shaped button cablebolt under the same condition. The results show that the bond capacity is in the order of (cone-shaped button cablebolt$\approx$bulb cablebolt) > rockbolt > plane cablebolt. It is found that the bond capacity of cone-shaped button cablebolt developed in this study is at least equivalent with an existing high performance cablebolt developed in foreign countries, therefore the cone-shaped button cablebolt could be used as one of supporting materials for underground structures in construction field.
Keywords
Cone-shaped button cablebolt; bulb cablebolt; rockbolt; pull test; performance evaluation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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