Xinhua News Agency, Beijing, March 5th (Reporter Qi Zhongxi) The reporter learned from China Railway Construction Corporation that on the 5th, the construction of the Xining to Chengdu Railway (Sichuan Section), which was designed by the First Railway Institute, officially started, marking the western part of China. Comprehensive construction of the main railway line has begun.
According to Duan Rongcheng, the general designer of Xining-Chengdu Railway and senior engineer of Tieyiyuan, the preliminary work of Xining-Chengdu Railway started in August 2015. Tieyiyuan started the full-line preliminary test in December of the same year and completed the final test in 2017. The feasibility study report on January 9, 2020 was formally approved by the National Development and Reform Commission, and it has the conditions for commencement.
As an important part of the country's mid-to-long-term high-speed railway network "eight verticals and eight horizontals", the Xining-Chengdu railway spans Qinghai, Gansu, and Sichuan. The main line is 836.5 kilometers long, and 17 new stations are planned and constructed at a design speed of 200 kilometers per hour. The total investment of the project is about 81.49 billion yuan, and the total construction period is planned to be 7.5 years. The total length of the line between Langmu Temple and Huangshengguan in Sichuan Province, which is under construction, is about 173 kilometers.
Duan Rongcheng introduced that the ratio of bridges to tunnels on the entire Xicheng Railway is as high as 80%, and they pass through basins, plateaus, river valleys, and mountainous areas. 65% of the new projects are above 3000 meters above sea level, and 4 national nature reserves are passed along the line. The geological conditions are extremely high. It is complicated and has great responsibility for ecological protection. To this end, Tieyiyuan has adopted methods such as erection of bridges and increasing the depth of the foundation pillars to solve the problems of poor geological development or crossing swamps. On the other hand, it has adopted methods such as bridge replacement roads and regular vegetation maintenance to strengthen the natural environment. Avoidance and protection of protected areas.