On Node Design & Construction Protection Technology of Super-large Diameter Pipejacking Crossing Shanghai Rail Transit L2

With the background of the south transmission main line improvement project of Shanghai Sewage Treatment Bailonggang Area, its two pipes-jacking withφ4 000 should cross the east extending section of rail transit L2 and Huazhou Rd. overpass bridge in the west side of Yuandong Ave. To guarantee the operation safety of rail transit and overpass bridge, the design is adopting streng the ning measures with smooth advancing of pipe-jacking and the third part monitoring guiding the construction to reduce the surrounding soil body disturbance as little as possible. Finally, the project has crossed successfully and the relative experience can be used as summary lessons.