Single-shield TBM

Large Diameter SPB

Large Diameter SPB

Large diameter SPB is mainly used in the construction of highway, railway and diversion tunnel project, its excavation diameter is in range of 8m ~ 11m. CRCHI has acquired key design & manufacturing technology for high water pressure and large diameter SPB. Many technical achievements are focused on the SPB, including cutter head tools’ adaptability design, tunnel face’s stability, high-efficient rock’s crush, long distance pipe’s quick transportation & management, heavy segment’s quick delivery, main driving sealing under high water pressure environment and cutter head tools’ replacement under normal pressure. All these technology can effectively  resolve the problems occurred during the SPB’s excavation, reducing the machine’s   fault rate and promoting the advance speed and construction safety.
9m Class SPB:

Item Parameter
excavation diameter9030 mm
total length128m
Min. curve radius350 m
driving typeelectric
total powerApprox. 4000 kW
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