Through the analysis of the construction technology of soft foundation treatment of bag-grouting pile in Shanghai-Nantong Railway, analysis of monitoring data of existing operating line and analysis of pile forming of bag-grouting pile, this paper accumulated construction experience of soft foundation treatment of operating line, so as to further improve the construction technology of bag-grouting pile to improve the quality of the pile, and ensure the safety of the operating line.%通过对沪通铁路临近营业线软基处理布袋注浆桩施工工艺分析、对既有营业线的监控量测数据分析及对布袋注浆桩成桩检测分析，积累营业线软基处理的施工经验，从而为进一步完善布袋注浆桩施工工艺，达到提高成桩质量、保证临近营业线安全运营的目的。
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