REMOVAL METHOD OF PILE FOUNDATION, PILE FOUNDATION AND INSTALLATION METHOD OF PILE FOUNDATION

PROBLEM TO BE SOLVED: To provide a removal method of a pile foundation which is installed on the water bottom ground for supporting an ocean wind turbine generator system.SOLUTION: The removal method includes the steps of: discharging earth and sand from the inside of a pile foundation 5 which has a...

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Bibliographische Detailangaben
Hauptverfasser:	MORIWAKA YOSHIHIKO, USAMI EIJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HEATING HYDRAULIC ENGINEERING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER SOIL SHIFTING UNDERGROUND OR UNDERWATER STRUCTURES WEAPONS WIND MOTORS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a removal method of a pile foundation which is installed on the water bottom ground for supporting an ocean wind turbine generator system.SOLUTION: The removal method includes the steps of: discharging earth and sand from the inside of a pile foundation 5 which has a hollow cylindrical shape; forming plural small holes 10 in the pile foundation 5 penetrating therethrough before installation or after discharging the earth and sand; and attaching a cap 22 to the top of the pile foundation 5 to cover the same. In this state, a compressed air is supplied into the inside of the pile foundation 5 to blow out the air from the small holes 10, and the pile foundation 5 is pulled out while being subjected to vibrations by means of vibration hammer 26.SELECTED DRAWING: Figure 7 【課題】洋上風力発電設備などを支持するために水底地盤に設置された杭基礎の撤去方法を提供する。【解決手段】中空筒状の杭基礎５の内部の土砂を排出する。杭基礎５には設置前又は土砂排出後にその内外を連通する複数の小孔１０を形成する。杭基礎５の頭部に閉塞用のキャップ２２を取付ける。この状態で、杭基礎５の内部に圧縮空気を供給して小孔１０から外部へ噴出させ、同時にバイブロハンマー２６により振動させつつ、杭基礎５を引き抜く。【選択図】図７