| 摘要 |
<p>PURPOSE:To control optionally the attitude of a seabed cable layer by a method in which the left and right-handed sleighs of the cable layer are made up of an earth contactor and plural ballast chambers and the inflow of sea water into the ballast chambers is adjusted to control the buoyance of the before and back portions of the cable layer. CONSTITUTION:Sleighs 13 are provided to the left and right sides of the body 12 of a cable layer 10 supporting a plow 17 in a vertically rocking manner, the cable layer 10 is towed by a tug boat, etc., and the seabed is excavated by high- pressure water nozzle provided in the front of the plow 17 to form a cable trench. While laying a cable in the trench, the cable is buried by soil and sand discharged from a soil discharge pipe. The sleigh 13 of the cable layer 10 is made up of a earth contactor 15 and ballast tanks 16 whose inside is divided into four chambers. When settling the cable layer 10, the exhaust valves 39 and 39' of the ballast chambers 31 and 33 from the working base ship, and the sea water is flowed into the ballast chambers controllably to adjust the attitude of the cable layer.</p> |
