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发布时间:2018-11-09 09:18:36 来源: 分享到:


The project of Tibet Line S5 (Lhasa-Tsedang Expressway) was constructed by CCCC Second Highway Engineering Co., Ltd., in which the Guigala Tunnel was designed as a separate double-hole tunnel with a total length of 12,878m. The length of the right tunnel is 12,945m, with an average altitude of about 4,300m. It is the longest highway tunnel with super high altitude in the world at present, besides, it has complicated geology with coalbed meth ane and water and mud gushing. 

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