Abstract:Taking the main bridge scheme of Taizhou Special Bridge on Yancheng - Yichang Railway as an example, the comparative selection and design analysis are conducted in detail. Based on the requirements of navigation assessment units and local competent departments, and combined with the surrounding environmental and construction conditions, three main bridge type schemes suitable for the construction of this bridge are proposed, such as steel-concrete continuous beam bridge, low-pylon cable-stayed bridge and continuous beam arch bridge. In the comparative selection of schemes, the factors of structural performance, construction difficulty, economic efficiency and landscape effect are comprehensively considered. The steel-concrete continuous beam bridge performs outstandingly in terms of structural force, landscape effect and construction technology maturity, and can meet the requirements for high-speed train passage at 350 km/h and the laying of ballastless track, which is determined as the optimal scheme, and can provide some reference for the construction of similar long-span railway bridges.
