| 摘要 |
PURPOSE:To form a uniform levelling surface by installing an extensible leg to a horizontal stand while mounting hydraulic sensors at the four corners of the stand and setting up a chute truck which can travel on the stand. CONSTITUTION:The four corners of a horizontal stand 1 are hung by wires 14 from a support ship, signals from hydraulic sensors 15 are compared and the wires 14 are adjusted to keep a device at a level while suspension is stopped temporarily at height from the proper bottom of the water by signals from an acoustic depth finder group 16, and the device is induced to a predetermined position. Legs 17 are expanded and contracted, the device is seated and the wires 14 are slackened, and the horizontality of the device is calculated accurately and the device is seated. A travelling stand 4 is made to travel on rails 2 for the horizontal stand 1 while a chute truck 7 is made to travel on rails 5 for the travelling stand 4, thus crosswise making a levelling chute 9 to travel, then paving and levelling rubble mounds. |
