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China: The right tunnel of Niubo No. 2 Tunnel of China Railway No. 5 Bureau Donglu Expressway was successfully completed
They overcame many construction problems such as complex and changeable surrounding rock, long-distance ventilation, complex geology, high-temperature operations, and tunnel water inrush...
http://big5.news.cn/gate/big5/www.yn.xinhua.org/20230912/f937194d05474e52afecf605d12f0a91/c.html
cover tunnel photo by: Matt Brown from London, England / CC BY
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中鐵五局動綠高速公路牛波2號隧道右洞順利貫通_新華網
big5.news.cn中鐵五局動綠高速公路牛波2號隧道右洞順利貫通-牛波2號隧道位于雲南省紅河州綠春縣牛孔鄉者俄村境內，順利貫通為後續該隧道左洞全面貫通提供了寶貴參數和施工經驗，也為該高速公路全線早日通車奠定了堅實基礎。