| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.21 ( November 1989 ) Civil and Architectural Engineering ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Underwater Plasma Arc Cutting Method for Interlocked Steel Pipe Piles Tsutomu Fujita, Hidetoshi Imura, Kohzo Akahide, Tateshi Koseki, Masaharu Hashimoto |
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Synopsis : Interlocked steel pipe piles are driven into the ground for construction of piers located in rivers or the sea. In such cases underwater cutting is often required at the end of construction. Cutting of junction pipes is so hard that the pipes will usually be cut before driving. This construction method sometimes causes troubles of water leakage and so on during construction. An effective underwater cutting machine system has been developed to solve these problems. It can cut not only pipe piles but also junction pipes. The system is mainly composed of a plasma arc cutting device and a grindstone device. The mechanism is simple and remote-controlled using some sensors attached. Work time needed for cutting a 800-mmΣ steel pipe pile and a couple of junction pipes is about 20 minutes, and thus an efficient automatic underwater cutting method has been established. |
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