Device for placing floor material on bed of stream

摘要

The device has a box (34) with a hydraulic pressure plate (52) for forcing out its contents, which is mounted on a separate frame (44) along with the hydraulics. It can be connected to lifting plant, such as a crane or excavator, and there are fasteners between the box and the frame which can be released.The box has a lower opening, which may be covered by a hydraulically operated base (36) which may be in the form of slats. The opening may be rested on the surface of a platform, which may be floating, and may also be able to be lowered below the surface of the water.