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Stability Analysis of Concrete Plugs Installed in Pilot Tunnels for the Storage of Compressed Air  

Lee, Youn-Kyou (군산대학교 해양건설공학과)
Song, Won-Kyoung (한국지질자원연구원 지구환경연구본부)
Park, Chul-Whan (한국지질자원연구원 지구환경연구본부)
Choi, Byung-Hee (한국지질자원연구원 지구환경연구본부)
Publication Information
Tunnel and Underground Space / v.20, no.6, 2010 , pp. 446-454 More about this Journal
Abstract
CAES-G/T (Compressed Air Energy Storage - Gas Turbine) power generation is a likely option for the buffer facility stabilizing the fluctuation of the renewable powers, such as wind and solar powers. Considering the geological conditions, the underground CAES facility is most probable if the CAES-G/T generation is planed in Korea. In this kind of facility, a concrete plug is installed to seal the compressed air in the container, so that the selection of the shape and dimension of concrete plug could be a critical design factor. The stability evaluation of two types of plug was carried out by investigating the distribution of the factor of safety in the plugs and the distribution of contact pressure over the contact surface. The analysis result shows that the taper-shaped plug is more structurally stable than the wedge-shaped plug for the given geological condition. Possible separation of the rock-concrete interface around the spring line of the wedge-shaped plug is anticipated, which means the possible leakage of compressed air through the side wall and also means the poor mobilization of frictional resistance on that area.
Keywords
Compressed air storage; Concrete plug; Finite element analysis; Conctact pressure; Factor of safety;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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