| 摘要 |
PROBLEM TO BE SOLVED: To provide an earthquake-tidal wave countermeasure structure of a structural body, capable of preventing liquefaction of the ground of the structural body by an earthquake and a tidal wave, a collision with the other structural body of the structural body, a collision with the structural body of a drift object, and sloshing of liquid in the structural body. SOLUTION: A plurality of sheet piles 5 and steel pipe sheet piles are driven in the ground 2 around a tank 3, and an end part of the steel pipe sheet piles is exposed on the ground. In an earthquake, the sheet piles 5 and the steel pipe sheet piles prevent the liquefaction of the ground. Since rigidity of the steel pipe sheet piles is larger than a steel sheet pile, vibration of a natural period of vibration of liquid in the tank 3 is reduced, and the sloshing of the liquid can be relieved. Even when the tank 3 drifts by the tidal wave, the tank contacts with a part exposed on the ground of the steel pipe sheet piles, and the movement of the tank 3 is checked. Even if the drift object flows in, since the drift object collides with the part exposed on the ground of the steel pipe sheet piles, the drift object can be prevented from colliding with the tank 3. COPYRIGHT: (C)2009,JPO&INPIT
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