July twenty seventh，Super-large diameter slurry balance shield machine jointly built by China Railway Construction Heavy Industry and China Railway 15th Bureau“Pilot number”Offline in Changsha No.2 Industrial Park of Railway Construction Heavy Industry，It will be applied to the tunnel construction of the first four bidding projects of Hangzhou Airport High-speed Railway Station.。

The tunnel shield construction section of Hangzhou Airport High-speed Railway Station Bid 4 project is 4069 meters long.，Shield Machine Will Underpass Hangzhou Metro Line 7、Many risk sources such as airport taxiway and airport express line，The project has high requirements for surface settlement control.、The overall construction is difficult.。

“Pilot number”Excavation diameter 14.3 meters，It is equipped with a high-precision gas-liquid pressure balance control system for excavation bin.、Long-life high pressure-bearing seal system、Tool state on-line sensing system and other key control systems，Fficient excavation with micro-disturbance、Long-life safe construction、High-precision guidance and deviation correction and other functions。

The total length of Hangzhou Airport High-speed Railway Tunnel is about 14 kilometers.，It is the first high-speed railway project in Zhejiang Province to cross the Qiantang River and the airport in the form of tunnels.。It is a convenient and fast inter-city railway corridor planned as the core area of the Yangtze River Delta.，After the completion of the line，Air-rail intermodal transport will be realized，Tandem airport、Urban Rail、expressway，Form multi-level rail transit，To provide good support for promoting the integration and high-quality development of the Yangtze River Delta。