METHOD FOR EXCAVATING SUBMARINE SURFACE AND CONSTRUCTING SUBMARINE VERTICAL WATERWAY

摘要

PURPOSE: A sea floor excavation and construction method is provided to prevent the subsidence of a casing due to excessive excavating load by connecting a support to the casing. CONSTITUTION: A sea floor excavation and construction method is as follows. A jack-up barge(10) is fixed to arrange a casing in a dredging side. A guide frame is established in one side of the jack-up barge. The casing is up pulled to arrange the casing on the dredging side using the guide frame. The underwater concreting is poured in the circumference of the casing. A subsidence preventive support supporting the upper side of 'the underwater concreting placed in the outer circumference of casing is established. The excavator is inserted into casing and the dredging side is out dug perpendicularly.