长江堤内深沉井施工关键技术研究

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

为了总结沉井施工的技术与经验,对某取水工程的沉井泵房的设计与施工过程进行了详细介绍。该沉井位于长江大堤内,地貌单元属于长江一级阶地。在对工程地质情况分析的基础上,对沉井下沉各阶段的受力情况进行了分析,设计了沉井下沉的施工方案。介绍了沉井下沉和封底过程中的关键施工技术问题以及特殊情况的处理方法。由于施工设计方案合理,处理措施得当,沉井施工质量满足设计要求。

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.