长江一级阶地沉井设计与施工的若干探讨

Discussion on Design and Construction of Open Caisson in the First Terrace of Changjiang River

摘要:

沉井工法越来越多地被应用到市政给排水及电缆通道的开发建设中，然而关于其在勘察设计和施工方面的经验总结文献目前相对较少。从勘察设计和施工角度出发，结合一流城市电网电缆通道工程案例，介绍基坑设计方案比选和沉井设计与施工注意事项，对长江一级阶地沉井工法相关的深井降水和止水帷幕等技术要素进行了探讨，做了简单总结并给出可行建议，为参与沉井工程技术人员提供参考。

Abstract:

The construction method of open caisson is more and more applied in the development and construction of municipal water supply, drainage and cable channel. But there is relatively little literature on its experience in survey, design and construction. From the perspective of the survey, design and construction, combined with a case of cable channel project for the first-class urban power grid, the comparison and selection of foundation pit design schemes, and the precautions for the design and construction of open caisson are introduced. The technical elements related to deep well dewatering and water-stop curtains in the first terrace of the Changjiang River are discussed, and a brief summary and the feasible suggestions are given, which provides the reference for the technical personnel involved in open caisson engineering.