DREDGE DEVICE AND DREDGE METHOD

摘要

Dredge device for removing a layer (107) of soil material from underneath an upper layer (106), comprising a pipe set to be positioned substantially vertical having a first pipe, which in the lowermost portion is provided with at least one nozzle and with means for supplying pressurised liquid, particularly water, to the nozzle, as well as with means for rotation of the first pipe about its centre line, wherein the pipe set comprises means for discharge through the pipe set of soil material eroded by the liquid discharged by the nozzle.