Some key techniques in construction of deep open caisson inside Yangtze River levee

In order to summarize the technology and experience of open caisson construction,we presented the design and construction procedure of an open-caisson pump station in detail.The open-caisson is inside the Yangtze River levee and the geomorphology is the first terrace of Yangtze River.On the basis of detailed analysis on geological condition of the works,the loading conditions of the open caisson in different stages were analyzed,and the sinking construction scheme of the open caisson was designed.The key technological issues and treatment measures under special conditions in open caisson sinking and bottom sealing process were introduced.Due to reasonable construction design scheme and proper treatment measures,no settlement or deviation of open caisson occurred up to now.