On the morning of December 21, at Xuyong North Station in Luzhou City, 46001 freight trains left the platform. At 14:08 in the afternoon, the passenger K9393 train will also start from Xuyong North to Guiyang, marking the successful completion of the construction of the new Xuyong to Bi section of the Longhuang Railway (hereinafter referred to as: the Xubi section of the Longhuang Railway) after 7 years of construction.
The Xubi section of the Longhuang Railway was constructed in sections of the Sichuan-Yunnan section and the Guizhou section, and the construction started in October 2016. Among them, the mileage of the main line of the Sichuan-Yunnan section is 1518 kilometers, 55 tunnels, 74 bridges, bridge-tunnel ratio of 8956%, led by Shudao Group;The mileage of the main line of the Guizhou section is 375 km, bridge-tunnel ratio 6993%, led by the Guizhou Company of Xubi Railway.
The Xubi section of the Longhuang Railway belongs to the construction of the new land-sea corridor in the west, starting from Xuyong North Station in Luzhou City, Sichuan Province, and going south through Xingwen County, Yibin City, Weixin County, Zhenxiong County, Zhaotong City, Yunnan Province, to Bijie East Station, Bijie City, Guizhou Province. The total length of the main line is 1893 kilometers, the design speed of 120 kilometers per hour, is a national single-track electrified railway, passenger and freight line mainly freight. There are a total of 14 stations in Xuyongbei, Jingui, Xingwennan, Baila, Gaotianxiang, Xiaping, Weixin, Luoxiao, Guozhu, Yile, Lanjiagou, Heguantun, Bijie and Bijie East in the Xubi section of the Longhuang Railway, among them, Weixin, Bijie and Bijie East are existing stations, and 6 stations in Xuyongbei, Xingwennan, Weixin, Guozhu, Yile and Bijie have opened passenger transport business.
The topography of the Xubi section of the Longhuang Railway is complex, and the construction is extremely difficult. The altitude of the line rises from 358 meters in the Sichuan Basin to 1,573 meters in the Yunnan-Guizhou Plateau, passing through three geomorphological units: hills, middle and low, low and medium mountains, and the Yunnan-Guizhou Plateau. There are 67 tunnels on the whole line, including 5 high gas tunnels, 26 low gas tunnels, 52 gas working faces, and 28 karst development tunnelsThere are 98 bridges on the whole line, with a maximum pier of 129 meters, a maximum span of 168 meters, and a total of 777 holes for beamsThe bridge-to-tunnel ratio of the whole line is as high as 8619%, high pier bridges, ultra-long tunnels are all over the place, bridges and tunnels are connected to special working conditions, there are frequent changes in ballasted and ballastless processes, and the project is close to the existing Chengdu-Guizhou Railway, spanning the three provinces of Sichuan, Yunnan and Guizhou, and it is difficult to coordinate and transport materials.
During the construction of the project, Shudao Railway Investment Group Xuzhen Company organized all parties involved in the construction, including Sichuan Road and Bridge, to coordinate the construction of the two projects of "civil engineering" and "talent engineering", actively promote standardized management, give full play to the leading and supporting role of scientific and technological innovation, research and development of more than 50 patented technologies such as "tunnel weak surrounding rock deformation device", and vigorously promote the "four new" technologies such as "lock foot anchor pipe positioning", create favorable conditions, scientifically organize construction, continue to overcome difficulties, and ensure the high-quality and efficient progress of the project. On May 20, 2022, after 6 years, the control project of the whole line is also the last tunnel, and the Banzhulin Tunnel was safely and smoothly completedOn July 20, 2022, the last major and difficult project of the whole line, the Fengjiazhai Bridge with the highest pier (129 meters) and the largest span (168 meters) of the whole line, was successfully closedOn January 14, 2023, the main structure of the passenger station of the whole line will be capped;On September 14, 2023, the track laying of the whole line was completed.
After the opening of the Xubi section of the Longhuang Railway, the transportation capacity of the first year (to 2025) will be 10.61 million tons of freight, and the number of passenger trains running in a single day will be 3 pairsIn the near future (until 2030), the transportation capacity will be 12.45 million tons of freight, and the number of pairs of passenger trains running in a single day will increase to 5 pairsIn the long-term year (until 2040), the transportation capacity is 22 million tons of freight, and the number of pairs of passenger trains running in a single day will increase to 8 pairs.
The Xubi section of the Longhuang Railway is a project for the unimpeded passage of the western land-sea new channel, a key section of the railway freight passage from Sichuan to Guangxi Beibu Gulf, and a red project to promote the construction of old revolutionary areas and help rural revitalization. After the opening of operation, it will organically connect the Chengdu-Chongqing Economic Circle, the Silk Road Economic Belt and the 21st Century Maritime Silk Road, which is of great significance for improving the transportation conditions and investment environment along the route, promoting the comprehensive economic and social development of southern Sichuan, northeast Yunnan and northwest Guizhou, consolidating the achievements of poverty alleviation in the regions along the route, promoting rural revitalization and development, and promoting ethnic cultural exchanges.
Chengdu **Jinguan News Reporter Chen Xuyang Photography** Chen Xuyang Editor-in-charge He Qitie Editor Wang Qi.