国内跨径最大的跨峡谷分离式混合梁斜拉桥成功合龙

Core Points - The successful completion of the Danjiang Xiaosanxia Bridge marks a significant milestone for the Mianxi Expressway project, which connects Henan and Hubei provinces [1][2] - The bridge is the largest span cable-stayed bridge in Henan province, with a main span of 536 meters and a total length of 919 meters [1] - The Mianxi Expressway project is expected to reduce travel time between Xichuan, Henan, and Danjiangkou, Hubei, by over one hour, benefiting approximately three million residents in the area [2] Summary by Sections Project Overview - The Mianxi Expressway spans 24.838 kilometers, designed for a speed of 100 km/h, and features a dual four-lane configuration [1] - The Danjiang Xiaosanxia Bridge is a key control project within this expressway, constructed by China Communications Construction Company [1] Construction Details - The main beam of the bridge is a separated steel box beam, constructed from 35 segments, with a maximum single segment weight of approximately 312 tons [1] - The total steel usage for the bridge approaches 10,000 tons, highlighting the scale of the construction [1] - The construction faced challenges due to environmental factors such as wind and bridge sway, necessitating high precision in monitoring and control during the installation [1] Future Implications - Following the completion of the bridge, the project will transition to the construction of road and bridge ancillary facilities, with an expected completion date in 2025 [2] - The new expressway will create a new transportation corridor for industrial development and the movement of people and goods among the provinces of Shaanxi, Henan, and Hubei [2]