Abstract
One of two LNG inground storage tanks with the world largest capacity of 200000kl, which have been under construction at the Negishi Terminal of Tokyo Gas Co., Ltd, was completed last November. This new tank is the landmark of the development for large capacity and shall be also the starting point. Many latest technologies have been adopted for this project and technological features are following as vertical NATM of soft rock, highstrength concrete of 600 kgf/cm2, RC doomed roof and automatic construction technology. The merits of inground storage include (1) higher safety, (2) effective use of land, (3) well harmony with scenery. Newly developed technologies as RC roof and high-strength concrete, are highly improved to the merit of inground storage tank, higher safety and the effective use of land. In this report, the development and construction of the side wall with highstrength concrete and the concrete doomed roof is described.
