PURPOSE: To provide a sufficient strength against internal pressure, to make the height of a roof low to such an extent that a coercive feeling is not given to the circumstance, and to reduce the amount of heat entering a tank by disposing girder members comprising reinforced concrete material or prestressed concrete material in a radial manner and forming a roof into a truncated cone- shape between the girder members.
CONSTITUTION: A body 11 of an underground tank is formed from a bottom plate 11a of cast-in-place concrete or the like and a cylindrical side wall 11b of reinforced concrete or the like. Next, a roof 12 is formed by disposing girders 13 comprising reinforced concrete material such as reinforced concrete or prestressed concrete in a radial manner. And a roof material 14 of reinforced concrete or the like is placed between the girders 13 to form them into a truncated cone-shape. As a result, the amount of heat entering the underground tank can be reduced and the amount of boil-off gas can be decreased.
NAKANO MASABUMI
KAWAMURA YOSHINORI
SHIRASAGO TAKESHI
YAMASHITA HIROBUMI
YASUNAGA MASAMICHI
TAKEUCHI HITOSHI
KURODA MASANOBU
IMOJIMA ATSUO
NAKANO KEN
NADA MINORU
KATO MASATOSHI
WATANABE MUNEKI
OHBAYASHI CORP
KAJIMA CORP
SHIMIZU CONSTRUCTION CO LTD
TAISEI CORP
MITSUI CONSTR