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손성곤(Sung-Gon Son),유진오(Jin-O You),유정훈(Joung-Hoon You),정재민(Jae-Min Chung) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
A rockbolt is one of the most important reinforcement of on-site soil as with the shotcrete and steel rib. The rockbolt by setting within the tunnel can prevent the deformation of the ground profile; furthermore it improves the structural behavior of soil and rock. In general the rockbolt is mainly used with reinforced steel. However steel pipe or the materials with the same strength can be used depending on the soil conditions ground water outflow condition and the surrounding of applying location. In Korea most tunnel construction sites have used cement mortar or resin for steel reinforcement on the rock. Due to the ground water outflow in the construction site the usability of steel reinforcement is poor and it requires curing time especially after installation. To improve exist above problems this study introduces the development of a swelled steel pipe rockbolt as well as presents the field testing and performance results.