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CREG TBM World's smallest diameter atmospheric cutterhead start for tunnel China Russia East Route Natural Gas Pipeline Crossing Yangtze River

    Chu Yang
    By Chu Yang Replies (1)

     

    World's smallest diameter atmospheric cutterhead Tunnel Boring Machine "Changtong" manufactured China Railway Engineering Equipment Group Co (CREG) factory.  7,95 meter.

    Tunnel 10,226 kilometer. Potential problem long-distance single-head excavation, cross Yangtze River, and 0.73 MPa water pressure. CREG develop pressure-bearing capacity of key part, and the explosion-proof design.

    Report is Russian Sputnik News

    https://big5.sputniknews.cn/economics/202105241033755219/

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