WEIGHT CALCULATION OF ARMOR LAYER CONSIDERING WORKABILITY IN DEEP SEA OF BREAKWATER

Abstract

 It is normal that the breakwater foundation mound will be protected by armor layer as necessary to ensure stability against waves. The conventional method in such cases is that armor layer satisfying the required mass calculated for the top of the mound surface are installed down to the bottom of the foundation mound slope. A concern here is the leveling of the foundation mound that is required prior to the installation of the armor layer. When breakwater is installed in deep sea, the leveling work should be performed in deep water, which significantly reduces the efficiency of the work and raises concerns about the impact on the overall construction schedule. Therefore, it was necessary to consider how to appropriately set the range of armor layer that had normally been installed down to the bottom of the slope in deep sea. In view of the above, this study was conducted to understand water current and flow at the foundation mound surface by numerical analysis, to identify the extent to which the conventional method should be applied via comparative verification with the conventional calculation methods, and eventually to clarify the applicability of these to the project site.