Case Analysis of Using Combined Excavation Methods to Demolish the Whole Shield Segments

Subway construction as a large long linear engineering project, the risk of time limit for a project is increas ingly prominent in recent years, adding station, canceling station or postponing station is common. So the combination using of various excavation method is an urgent needing, to solve the new problems caused by the plan adjustment, to meet the operating function under the premise of effective control time limit for a project. Based on Beijing subway line 10 second phase Liuliqiao station--Maguanying station (delayed) Lianhuaqiao station interval for the engineering example, this paper detailed interprets the method of shield segment removed and Air duct implementation after the shield tunneling ahead and track-laying. For similar project and feasibility study on implementation of postponed station, it has the reference significance.