METHOD AND SYSTEM FOR LAYING UNDERGROUND A CONTINOUS ELONGATED MEMBER IN A BED OF A BODY OF WATER.

摘要

A method of underground laying a continuous elongated member (4) in a bed (2) of a body of water (3), wherein the continuous elongated member (4) lies on the bed (2) of the body of water (3) along a given path (P); the method including the steps of : - fragmenting a soil mass (14) in the bed (2) along the given path (P) and under the continuous elongated member (4), so as to form in the bed (2) two scarp slopes (13) bounding the fragmented soil mass (14) by two soil masses (12) susceptible to slide; - advancing two supporting walls (27) along the given path (P) in an advancing direction (D1), along the respective two scarp slopes (13), and transferring the fragmented soil mass (14) between the two supporting walls (27), so as to promote sinking of the continuous elongated member (4) between the two supporting walls (27).