| 摘要 |
PURPOSE:To provide firmly compacted rubble-mound, by a method wherein a travelling truck is laterally movably installed on a working ship, a guide leader and a damper device are located to the travelling truck, and rubble- mound is compacted through the working of the damper device. CONSTITUTION:A guide leader 20 is stood vertically to a working ship 1, and with a vibrator 41 started, the vibration is transmitted to a damper plate 43 through a casing pipe 42 to compact rubble-mound C1 on a sea bottom surface. Simultaneously, a pressurizing work is carried out throughout a specified width through movement, in the direction of the width of the working ship 1, of a travelling truck 10. Thereafter, after an anchor is lifted up to move the working ship 1 by a given distance, a compacting work is effected in a similar manner described above. In which case, the unwinding length of a wire 27 is regulated depending upon a water depth to hold the damper plate 43 in a proper position. This enables construction of underwater mound so firmly compacted. |
