Abstract:

West Qinling tunnel is the longest railway tunnel under construction in China that is bored by TBMs. In order to meet the requirements of the tight construction schedule, the mode of mucking by belt conveyor system and lining at the same time with TBM boring is adopted. Study is made on how to minimize the construction interferences, how to move the lining formwork jumbo, the repairing platform and waterproofing membrane placing platform without interferences on the TBM boring and how to arrange the belt convey through the lining formwork jumbo. Due to the measures taken, the advance rate is accelerated, the construction period is reduced and the safetyrelated risk is minimized. The experience can be served as reference for similar projects in the future.

Key words: mucking by belt conveyor, TBM, synchronous lining