Abstract:  There are not machine hoisting shaft around Qingdao station of Qingdao metro line 1, accordingly, after disassembling of doubleshield tunnel boring machine(TBM), it should be hoisted through pilegroup support. To rapidly and efficiently disassemble the two TBMs, an overall modularized TBM disassembling scheme is designed to disassemble the main machines and support trolleys. The steel rails are laid in tunnel and the translational support frame technology is adopted to push the TBM from right line to the disassembling tunnel on the left line. After TBM assembling, the TBM components are transferred through the existing station after laying steel sleepers and blocking up transportation, so as to avoid the interference with platform. Reasonable hoisting radius is designed to realize successfully TBM hoisting through pilegroup support and save the time.

Key words: shallow tunnel, doubleshield tunnel boring machine, modularized disassembling, intunnel disassembling, pilegroup support