DREDGING WORK SYSTEM AND DREDGING WORK METHOD

摘要

PROBLEM TO BE SOLVED: To improve a construction capacity in the dredging work in an environment of a low altitude head, while reliably preventing the contact of a working machine of a heavy machine to an existing structure.SOLUTION: A dredging work system 10 includes a work barge 12, a heavy machine 14, approach detection means 20, operation limiting means 26 and control means 30, etc., and bridge girders or piers are set as contact watching objects. Then, when detecting a working machine 16 of the heavy machine 14 coming close to the contact watching objects by approach detection means 20, an operation of the heavy machine 14 in which the working machine 16 further comes close to the contact watching objects is inhibited by the operation limiting means 26 until this approach state is released. As a result, the working machine 16 can be prevented from coming into contact with the contact watching objects. Also, a construction space can be secured to a range where the approach detection means 20 detects the approach of the working machine 16 to the contact watching objects, and thereby construction capacity can be improved while preventing the working machine 16 from coming into contact with bridge girders, etc.