ABSTRACT
Guide dike, literally, is the guide for navigation. And it is also constructed to reduce the effects of wave and prevent future sedimentation within the channels. As part of the Yangtze Estuary Development Project, a breakwater was constructed 40 km away from a busy port in Shanghai, China. The guide dike was approximately 50 km. The water depth ranged from 7.0 to 8.5 m. The design wave height was 3.32 to 5.90 m with a return period of 25 years. The breakwater was designed as gravity retaining structures using prefabricated, semi-circular shaped concrete caissons to resist the rough waves (Yan, 2005).
