Various municipal pipelines under the existing roads in the central urban area are very dense, and all pipelines within the construction scope of the large excavation of the foundation pit of the rail transit station need to be relocated, especially the relocation of large-scale drainage pipelines is the most complicated, and because it involves temporary drainage , the cost of relocation is usually higher. Taking the construction of Shanghai Rail Transit Line 14 Project Dongxin Road Station as an example, combined with the overall design of the rail transit site, the Φ2400 combined sewage main pipe was permanently relocated on Wuning Road (North Kaixuan Road-Puxiong Road), and some The nodes are pre-reinforced and temporarily drained to ensure the smooth construction of rail transit stations.