Study for Operation Method of Underwater Cable and Pipeline Burying ROV Trencher using Barge and Its Application in Real Construction

Abstract

In general, subsea cables and pipelines are buried for the purpose of supplying power and communication between land and islands (subsea cables), transporting fossil fuels (pipelines), and connecting waterworks (pipelines). Since these cables and pipelines are exposed to man-made hazards (tools such as anchors, trawl doors, etc.) and natural hazards (earthquakes, typhoons, etc.) (Jones and Hirai, 2001; Yoo and Shin, 2010), the burial is performed using various protection methods for economical feasibility and stability (Ahn and Kim, 2009). This research institute developed an underwater heavy-duty Remotely Operated Vehicle (ROV) trencher (Underwater Robot. It's Trencher, URI-T) to conduct the post-lay inspection and burial (PLIB) of pre-laid cables and pipelines beneath the seabed using a water jetting system. URI-T was one part of a