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http://dx.doi.org/10.9711/KTAJ.2010.12.6.443

A study on behavioral characteristics of concrete lining based on the equations of relaxed rock loads  

Kim, Sang-Hwan (호서대학교 토목공학과)
Park, Inn-Joon (한서대학교 토목공학과)
Moon, Hoon-Ki ((주) 용마엔지니어링 터널부)
Shin, Yong-Suk (한국시설안전공단 진단계획팀)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.12, no.6, 2010 , pp. 443-450 More about this Journal
Abstract
A concrete lining of NATM tunnel had been considered as interior materials. But recently we consider it as structural materials. Therefore we must consider various loads. Relaxed rock load is a main load which decides thickness and reinforcement presence of concrete lining. In practice conservatively, Terzaghi's rock load theory has been accepted to estimate relaxed rock loads in urban subway tunnel design. This study investigates the equations of relaxed rock loads used in the design of NATM concrete lining. Structural analysis are executed based on various equations of relaxed rock loads, and concrete lining forces are compared.
Keywords
Structural materials; concrete lining; relaxed lock load; structural analysis;
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