| 摘要 |
PROBLEM TO BE SOLVED: To provide a work large for driving drain members capable of driving vertical drain members accurately and quickly, of connecting also to horizontal drain members easily and efficiently, and of carrying out construction work into boundary region by accurately driving vertical drain members in the boundary region to already driven area. SOLUTION: A rail 3 is laid on the deck of a pontoon 1 made of 9 small float pontoons so as to extend it from the side surface of the hull, a traverse base 4 is moved on this rail 3, and a vertical drain member driving machine 2 is installed on the traverse base 4, Then, a work deck 2g having a drain member connecting device is provided in the lower portion of the vertical member driving machine 2, thereby permitting the movement of the whole of pontoon 1 by using a winch 5 and a wire 6.
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