| 摘要 |
A ballast placing system for underwater pipe lines makes use of a traveler vehicle operating on the ocean floor to place aggregate material at the sides of a pipe line as ballast. The vehicle has a frame including side members which straddle the pipe line and a central structure located above the pipe line interconnecting the side members. Adjacent the aft end of each side member is a hydraulic activated Caterpillar Drive unit for moving the vehicle in a forward direction and forward of the Caterpillar Drive unit is a supporting sled and a guide structure for aligning the vehicle relative to the pipe line. At the top of the central structure is a hopper from which extends a downwardly directed chute which divides into two branch chutes, one located on each side of the pipe.
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