复杂条件下沉井式泄水井设计与施工

The design and construction of drainage well using the skill of open caisson under compicated conditions

沉井施工是一种市政和地下工程中常用的非开挖施工方法,广泛应用于城市顶管工程施工及野外不具备基坑开挖等复杂条件下的地下工程施工。结合南水北调配套工程石津干渠压力箱涵沿线改造泄水井工程,重点探讨在毗邻重要水工建筑物、高地下水位且不允许常规降水等复杂条件下沉井设计与不降水施工中的几个主要节点问题,总结工程设计施工经验,可供类似工程参考和借鉴。

Open caisson construction is a common trenchless construction method in municipal and underground engineering,which is widely used in urban pipe jacking engineering construction and underground engineering construction without excavation conditions in the field.This paper is based on the project of rebuilding the drain well along the pressurized culvert of Shijin main channel,which is the auxiliary project of South-North Water Transfer Project.Focus discussion on the main problems such as adjacent to important hydraulic structures,high groundwater level and no conventional precipitation.Sum Up the experience of engineering design and construction as a reference for other similar projects.