TRENCHING APPARATUS AND METHOD

摘要

A mobile apparatus for trenching a pipeline laid under water includes a mobile base station such as a barge (1), a soil breaker (4) for breaking up soil adjacent to the pipeline, the soil breaker being connected to the mobile base station (1), one or more dredging units (5A to 5C) connected to the mobile base station for removing soil broken up by the soil breaker from under the pipeline (7) and conveying away the soil mixed with water to form a trench, and a backfilling unit (6) connected to the mobile base station (1) for receiving soil removed by the one or more dredging units (5A to 5C) and conveying the soil into the trench to cover over the pipeline (7).