Hydraulic Experiments on Stable Armor Weight and Covering Range of Round Head of Rubble-Mound Breakwater Armored with Tetrapods: Non-breaking conditions

摘要

The re-analysis on the stable weight of the concrete armor unit (CAU) at the roundhead and the suggestion of the covering range at the roundhead with the increased weight of CAU were conducted.Tetrapods were applied to the tests and the three dimensional hydraulic tests were performed.The test results for the stable weight at the roundhead area were similar to the guides from Korean Design Standard for Harbour and Fishery Port (MOF,2014) and Coastal Engineering Manual (USACE,2005).The investigation of covering range at the roundhead of rubble mound structures armoured with Tetrapods was suggested that the length of five times of the design wave height from the tip of the superstructure was needed and appropriate.Both sides of the superstructure should be covered with increasing weighted CAU to satisfy the stability at roundhead area.