Consideratons on Omura Bay Bridge from Engineering Point of View

The Omura Bay is situated in the central part of Nagasaki Prefecture, which yields many problems including traffic one between both the northern and southern parts and the eastern and western parts of the Prefecture.In this paper the authors proposed a concept of the Omura Bay Bridge in order to solve these problems, and considered on the concept from engineering point of view. Discussions werefocused on environmental, bathymetric and soil surveys, route location, bridge type and others. As the type of bridge, a pontoon type was considered to be more prominent than the other types owing to its working period and cost shortage, and if this type bridge were built here the Omura Bay Bridge will be welcomed to be a tourist route as the first one in this type in Japan.