Method and apparatus for placing a hollow column in the hard bottom of a body of water in particular in a rock bottom

摘要

Method and apparatus for lowering a heavy hollow column into hard soil and rock at the bottom of a body of water which column has a downwardly widening outer surface and a sharp lower edge. By means of plurality of suction nozzles erosive water flows are generated alongside and below the lower edge which sharp lower edge due to the erosive effect of the water flows and the local tensions generated in the soil by the weight of the column disintegrates the soil.