本文介绍了南通狼山水厂扩建工程DN2200大直径顶管复杂环境下的施工技术;详细阐述了混凝土管顶管施工步骤与工艺。实践证明本工程所采用的泥水平衡式顶管施工工艺所适用的土质范围较广,在地下水变化范围较大的条件下仍能很好适用,同时可有效地保持挖掘面的稳定,可以给同类工程施工提供参考。 This article introduces the construction technology of DN2200 large diameter pipe jacking project of Nanshan Langshan Waterworks Expansion Project. The construction steps and technology of concrete pipe jacking pipe are described in detail. Practice has proved that the mud-water balance pipe jacking construction technology used in this project is suitable for a wide range of soil quality and can be well applied under the condition of large variation range of groundwater. At the same time, the stability of the excavation face can be effectively maintained, Engineering construction for reference.