市政工程深沟槽施工对城市中的建筑物、基础设施及地下管线等有较大的影响。如何在周边环境复杂的城市地下空间采取合理的支护方案保障深沟槽施工安全已成为项目管理的重要内容。基于某大街Y2~Y4段雨水管道深沟槽施工,阐述了钢管桩在环境复杂的城市地下空间内深沟槽支护中的应用,克服了施工过程中存在的难题。 Municipal engineering deep trench construction on the city’s buildings, infrastructure and underground pipelines have a greater impact. How to adopt a reasonable support scheme in underground space with complicated surrounding environment to ensure the safety of deep trench construction has become an important part of project management. Based on the deep trench construction of Y2 ~ Y4 section rainwater in a main street, the application of steel pipe pile in the deep trench support in the urban underground space with complex environment is expounded, which overcomes the difficulties in the construction process.