| 摘要 |
PROBLEM TO BE SOLVED: To prevent newly-built and existing highrise buildings etc. from wholly collapsing due to long hours of combustion of large quantities of aviation fuel, which is caused by a collision of an aircraft at an act of terrorism and an accident. SOLUTION: Aboveground general floors of the highrise building etc., which arouses concern about the collision of the aircraft, are provided with exhaust ports for floor drainage similar to floor drainage on a roof floor. Thus, pipes are arranged in a reinforced-concrete underground cistern which is composed of a foundation slab, a bottom-floor floor slab directly above the foundation slab and a foundation beam surrounding the floor slab, or an underground cistern which is provided outside a building, so that large quantities of the aviation fuel, which leaks out of the aircraft colliding with the building, can be rapidly flowed down into the underground cistern from the floors with which the aircraft collides. COPYRIGHT: (C)2004,JPO
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