Under Ground LNG Storage Tanks
<div> Liquefied natural gas (LNG) is a source of clean energy with stable long-term supplies that was first </div> <div> introduced into Japan in 1969. Since that time, sixty-six in-ground tanks for the storage of LNG, with a total </div> <div> capacity of 5,540,000 kiloliters, have been constructed in the country. Rapid developments in the technology </div> <div> used to construct these in-ground tanks, including the introduction of the super-deep slurry wall method and </div> <div> large-scale vertical NATM, have led to ever-increasing storage capacity — rising from 10,000 kiloliters in </div> <div> the early days to 200,000 kiloliters today. Completely buried tanks with concrete dome roofs have been </div> <div> constructed, and today’s technology is such that tanks with rigid side wall to bottom connections are being </div> <div> constructed in large numbers for cost reduction while enhancing reliability and safety. This paper describes </div> <div> trends in LNG tank technology and the latest technological developments, as achieved by the author in his </div> <div> work at Tokyo Gas Co., Ltd. </div> <div> <br> </div> <div> Keywords: LNG in-ground tank; slurry wall; reinforced concrete dome roof; prestressed concrete; </div> <div> non-linear analysis; self-compacting concrete; rigid connection between side wall and bottom slab </div> <div> <br> </div>