DRAG HEAD FOR A TRAILING SUCTION HOPPER DREDGER AND METHOD FOR DREDGING USING THIS DRAG HEAD

摘要

The present invention relates to a drag head (1) of a trailing type suction hopper dredger, comprising: a visor (2) pulled in a drag direction on the floor and loosening the soil; and a dust collector (2) connected to the visor And a suction conduit (3) which is connected to the suction conduit (3). The drag head is provided with a cutting body for loosening the soil, the cutting body including a bit (20). The harder soil can also be dredged by the drag head by applying the bit 20. The present invention also relates to a method for dredging an at least partially rigid underwater floor using a trailing-type suction hopper dredger on which a drag head is mounted.;