Underground reservoirs having a sole leak-proof tank for holding for example a liquefied gas, and the arrangement of such reservoirs

摘要

The present invention relates to an underground reservoir having a single (sole) leakproof (leaktight) container, such as especially a liquefied cryogenic gas. This reservoir which is of the type comprising an external container (2) made of concrete buried in the ground, a rigid structure with a base slab (4) and possibly a covering dome (3) as well as a leaktight heat-insulating jacket (5) which inside the structure delimits a filling space for the fluid, is characterised in that the external container (2) has the form of a substantially leaktight thick wall, this container (2) as well as the covering dome (3) being formed integrally with each other and, together with the base slab (4) constituting the rigidifying structure of the reservoir. The invention applies to a holding tank, for example for a port terminal, for filling with liquid natural gas. IMAGE