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| Study on Arrangement Scheme of New Baishatuo Six Lines Yangtze River Bridge of Chongqing-Guiyang Railway
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| AI Zong-liang, CHEN Ke-jian, YAN Yong, YUAN Ming, TONG Deng-guo |
| China Railway Eryuan Engineering Group Co. Ltd，Chengdu, Sichuan 610031, China） |
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Abstract Abstract：Research purposes： New Baishatuo Six Lines Yangtze River Bridge of Chongqing-Guiyang Railway is controlled by terrain, navigation, flood flowing, environmental protection, bridge site and so on, and the main bridge adopt (81+162+432+162+81) m six lines bridge across Yangtze River. In the world scope, large span bridge of six lines railway has not been constructed yet. Combined with the line conditions and bridge engineering, the arrangement scheme of bridge was studied.
Research conclusions：（1）Based on the factors, such as economy, landscape effect, convenient construction, the site condition and so on, it was recommended to adopt steel truss girder cable-stayed bridge scheme. （2）Based on line conditions, and based on the highway-railway bridge construction investigation at home and abroad, it was confirmed that "up 4 down 2" of six lines railway on two layers is the optimal scheme. （3）Inverted trapezoidal section scheme with 3 main trusses, bracket section scheme with 2 main trusses, inverted trapezoidal section scheme with 2 main trusses, rectangular section scheme with 2 main trusses were compared, and the research results show that rectangular section scheme with 2 main trusses is the optimal solution.（4）The research results can provide a reference for the design of multi line railway bridge or highway-railway bridge.
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