Wendeng Pumped Storage Power Project

Innovative compact TBM has solved difficulty of constructing small curve tunnels.

The drainage gallery project of the Wendeng Pumped Storage Power Station is faced with several difficulties, such as a small excavation diameter, high rock strength, good integrity of the surrounding rock and ultra small turning radius. All these pose challenges to the efficient rock-breaking, reliability and overall adaptability of TBM. Based on the characteristics of the project, CREG has customized the 37-meter-long hard rock TBM with an excavation diameter of 3.53 meters. Its volume is only about 80% that of a conventional TBM, and its turning radius is only 30 meters, which is one-tenth of that of a conventional TBM. This has maximized its flexibility and maneuverability.

Project Background

The full-face hard rock TBM construction method has been introduced into the construction of pumped storage power stations. It is of great significance for promoting the high-quality development of China's TBM industry and the intelligent construction of pumped storage power stations.

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Schematic diagram of Wendeng Pumped Storage Power Project

The TBM has achieved excellent performance in its debut.

The TBM has negotiated several continuous small curves.