PROJECT | CHINA - DALIANGSHAN NO 1 HIGHWAY TUNNEL


Above: An 8m o.d. refurbished gripper TBM was selected to excavate the central pilot tunnel


To meet all the above requirements, the TBM-


bored pilot would need to be large enough to accommodate a two-lane roadway and connect laterally to the main tubes via the project’s 36 smaller cross-passages for people and the 16 vehicle cross- passages.


With these decisions made, the contractor engaged to


complete the TBM pilot tunnel, one of four contractors engaged on the full tunnel project, selected an 8m-diameter refurbished gripper machine. The TBM was assembled on a limited laydown apron at the launch portal, its components having made a difficult


Above: The primary lined TBM pilot tunnel and its continuous conveyor mucking system 32 | September 2024


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