Shulou(Shulou.com)11/24 Report--

Thanks to CTOnews.com netizens for the clue delivery that you can change your name again! According to the release of Southwest Railway, the Yunwushan Tunnel, the first gas tunnel in the Sichuan-Chongqing section of the Chongqing-Kunming high-speed railway (hereinafter referred to as the Sichuan-Chongqing section of the Chongqing-Kunming high-speed railway), was successfully completed 08:08 on November 23, with the last blasting.

Located at the junction of Jiangjin District and Yongchuan District of Chongqing, Yunwushan Tunnel is the first gas tunnel in the Sichuan-Chongqing section of Chongqing-Kunming high-speed railway. the total length of the tunnel is 2238m, which is designed by the second Institute of China Railway and built by the second Bureau of China Railway. According to reports, the main risk of the tunnel is that the tunnel passes through the coal measures strata of the Xujiahe formation of the Triassic, which is a low-gas tunnel with double gas of coal and natural gas, the surrounding rock of the tunnel is weak, and the surrounding rock grade is mainly Ⅳ and Ⅴ. At the same time, the tunnel passes through the Mayanya reservoir, and the risk of construction operation is high. The construction team finally ensures the safe production of the gas tunnel.

CTOnews.com learned that the Chongqing-Kunming high-speed railway is an important part of the Beijing-Kunming channel, one of the main channels of the "eight vertical and eight horizontal" high-speed railways in China. The line starts from the Chongqing West Railway Station, passes through Chongqing, Sichuan, Guizhou and Yunnan provinces, and connects to Kunming South Railway Station with a designed speed of 350km per hour and a total length of 699km.

It is understood that after the completion of the Chongqing-Kunming high-speed railway project, a new high-speed rail link will be added from Chongqing to Kunming, which will greatly improve the travel conditions of residents along the line, build a "new map" of economic life in the areas along the line, and form a new pattern in promoting the large-scale development of the western region. it plays an important role in promoting the close relationship between the Chengdu-Chongqing economic circle and the urban agglomeration in central Yunnan, and provides strong support for the regional integration and linkage of the Yangtze River economic belt. Effectively promote the coordinated and sustainable development of regional economy and society.

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