| 摘要 |
PURPOSE:To grasp exactly the advancing condition of dredging work by a method in which a gyroscope for detecting the swinging angles of a suction head is provided, an echo sounder is provided in a given direction from the swinging direction, and the dredging work amount is calculated. CONSTITUTION:Echo sounders 6F and 6B capable of measuring the distance of sludge 5 of seabed from the sludge face are set at the distance of about 1m on the front side F and back side B at almost right angle to the swinging direction S of a suction head, by which the depth of dredging work is detected. The swinging width is detected by a gyroscope 8 and the dredging amount is calculated from the detected values of swinging width and dredging depth. By detecting the swinging speeds of the head 3, the efficiency of dredging work can be known. Since the dredging amount can be soon obtained during the dredging work, the advancing condition of the dredging work can be determined to make the construction administration of the dredging work easier. |
