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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
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
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://big5.sputniknews.cn/economics/202105241033755219/
中俄東線天然氣管道長江穿越工程盾構順利始發
big5.sputniknews.cn據中國中鐵工程裝備集團設計研究總院消息，2021年5月18日，由中鐵工程裝備集團有限公司自主研制的世界最小直徑常壓刀盤盾構機「暢通號」在中國江蘇南通順利始發。