On June 21, after more than six years of hard work for more than 2,200 days, all tunnels of the Chengdu-Kunming Railway Capacity Expansion and Reconstruction Project (New Chengdu-Kunming Railway) were completed! The Xiaoxiangling Tunnel was finally opened. It is located in Xide County and Yuexi County of Liangshan Yi Autonomous Prefecture, Sichuan. It is also the longest tunnel of the Xincheng-Kunming Railway. It is worth mentioning in the video that about 30 kilometers southeast of the Xiaoxiangling Tunnel is the first long tunnel of the Laocheng-Kunming Railway, the Shamarada Tunnel, which is about 6 kilometers long. Back then, the builders relied on steel drill sledgehammers and carried them on their shoulders. The length of 6 kilometers was the limit. Now, the excavation length of the Xiaoxiangling Tunnel is almost four times that of the Shamarada Tunnel. The Emian section of the Xincheng-Kunming Railway, where the Xiaoxiangling Tunnel is located, has complex geology. The line passes through the Daxue Mountain, Daliang Mountain, Xiaoliang Mountain, Xiaoxiangling and other mountains in the eastern range of the Hengduan Mountains. The problem of water damage is especially the biggest “stumbling block”. To this end, more than 30 experts organized the establishment of the “Railway Tunnel Construction Technology Innovation Studio”, and through the use of water exploration, drainage, drainage, water separation, etc.
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