UNDERGROUND LOW-TEMPERATURE TANK FACILITY AND GROUND FREEZING PREVENTING METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To prevent approach of freezing area to be formed around a reservoir nearly close to a surface of the ground. SOLUTION: This underground low-temperature tank facility has a structure that a cavity excavated underground is used as the reservoir 1 to store a low-temperature fluid and that air-tightness and liquid-tightness of the reservoir are secured by the freezing area formed around the reservoir. A water-sealing boring 4 is provided underground over the reservoir, and water is circulated inside the water-sealing boring to maintain temperature of the peripheral ground at the freezing temperature or more to hinder enlargement of the freezing area at that position. In the case of storing liquefied gas as a low-temperature fluid in the reservoir, warm wasted heat generated when liquefying the evaporated gas from the liquefied gas again in a ground surface part to heat the water circulating inside the water sealing boring. COPYRIGHT: (C)2005,JPO&NCIPI