CONSTRUCTION METHOD FOR UNDERGROUND TANK - Nippon Steel Corporation

Title:

CONSTRUCTION METHOD FOR UNDERGROUND TANK

Document Type and Number:

Japanese Patent JP3179867

Kind Code:

B2

Abstract:

PURPOSE: To prevent a safety liquid from separating and aging and reduce the thickness of a tank plate in terms of a method which constructs an underground tank based on the application of buoyance in a shaft which uses the protection liquid.
CONSTITUTION: A protection liquid circulation pipeline 3, which is designed to circulate a protection liquid 10 in a shaft 11, is mounted to a bottom cover 2a of an underground tank 1. While shell units 2 of an underground tank 1 are jointed and welded one after another at a specified ground position and the tank 1 is installed underground in the shaft 11. A buoyancy adjusting liquid 9 is fed into the underground tank 1 while a float 5 is mounted to the protection liquid circulation pipeline 3 so that a buoyance controlled liquid level 9a and a protection liquid level may be placed virtually in the same elevation, thereby minimizing the differential pressure both inside and outside the tank 1.

Inventors:

Hidehiko Yoshiwaka
Hisashi Hasegawa
Hayao Yanagimoto
Takashi Kojima

Application Number:

JP15262492A

Publication Date:

June 25, 2001

Filing Date:

May 20, 1992

Export Citation:

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