Abstract: In order to solve the problems of low mechanization, poor operating environment, large safety risk, and low construction efficiency in the construction of flat tunnels of pumped storage power stations, a compact TBM that can adapt to ultra-small turning radius construction was studied. On the basis of TBM, the tail shield, auxiliary push cylinder and segment assembling machine are eliminated, and the integrated TBM machine is designed in combination with the open TBM anchor net spraying support system. The design of the "V" propulsion system is adopted, and the cutter plate forging thick plate technology , Knife spacing design of cutters, combined wear-resistant protection design, compact machine design, ultra-small turn belt adaptability design, integrated belt design, remote operating system design. Engineering practice shows that the research results have been successfully applied in the construction of the drainage corridor of Wendeng Pumped Storage Power Station, which provides a reference for the construction of the TBM method in the field of flat tunnels and other similar projects of the pumped storage power station.

Key words: Pumped storage power station, TBM, Compact, Small turning radius, Propulsion system, Remote operation