The reporter learned from the Beijing-Kunming High-Speed Railway Xikun Co., Ltd. that at 14:18 on January 20, after 48 hours of continuous operation, the suspension continuous beam of the Shuangdi No. 1 Special Bridge in the Luzhou section of the Yukun-Kunming high-speed railway was successfully completed, laying a solid foundation for the early opening of the Sichuan-Chongqing section of the Chongqing-Kunming high-speed railway.
It is understood that the Shuangdi No. 1 Special Bridge is located in the territory of Jiangyang District, Luzhou City, the total length of the bridge is 2250.27m, the design speed is 350 kilometers per hour, it is a ballastless track double-line high-speed railway special bridge, the main bridge continuous beam is 144m in length, the design adopts the hanging basket symmetrical cantilever pouring construction, the bridge pier adopts a rounded end shaped solid pier, and the highest pier height is 29m. The bridge was designed by the Second Courtyard of China Railway and built by the Fourth Bureau of China Railway.
According to Wu Yule, manager of the four standards and two branches of the Sichuan-Chongqing section of the Chongqing-Kunming high-speed railway station of the Fourth Bureau of China Railway, the Shuangdi No. 1 Special Bridge is a key project for the first frame of the box girder of the bid section, and the continuous beam beam body of Helong is a single box single chamber, variable height, variable section box girder, and the bottom plate, web plate, and top plate are partially thickened inward, all of which are linearly changed according to a straight line, and the construction is difficult. Shuangdi No. 1 Special Bridge is the first special structure bridge in the direction of the first four-standard beam field of the Sichuan-Chongqing section of the Chongqing-Kunming high-speed railway, and the design unit carries out the design of the construction organization plan according to the start time, the engineering situation between the beam field and the site, the construction progress and other aspects during the design process, laying a theoretical foundation for ensuring the smooth erection of the box girder of the bid section.
The Yukun-Kunming high-speed railway is the Yukun section of the Beijing-Kunming high-speed railway, with a total length of 699 kilometers and a speed of 350 kilometers per hour, which leads from Chongqing West Railway Station, the hub of Chongqing, through Shapingba District, Jiulongpo District, Dadukou District, High-tech Zone, Jiangjin District, Bishan District, Yongchuan District, Luzhou City and Yibin City in Sichuan Province, Bijie City in Guizhou Province, Zhaotong City and Qujing City in Yunnan Province, and finally kunming South Railway Station, which is an important part of the Xi'an to Kunming section of the Beijing-Kunming Passage, one of the "eight vertical and eight horizontal" of the national high-speed rail network. After completion and opening, it will further improve the national comprehensive three-dimensional transportation network, strengthen the connection between the chengdu-Chongqing area twin-city economic circle and the central Yunnan region, greatly reduce the railway travel time from Chongqing to Kunming, greatly improve the travel conditions of the masses along the line, and promote the high-quality economic and social development along the line.