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| Research on the Design of the Main Bridge of Dongxin Ganjiang Bridge |
| AI Zong - liang，MA Ting - lin，DAI Sheng – yong |
| (China Railway Eryuan Engineering Group Co. Ltd，Chengdu，Sichuan 610031，China) |
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Abstract Abstract ： Research purposes ： The Dongxin Ganjiang Bridge is a key project of Xiangtang - Putian Railway and Hangzliou - Nanchang - Changslia High Speed Railway，which is connected to Nanchang West Railway Station. The bridge has the characteristics of multi-line，wide trips，heavy load，large span，high speed，etc. In order to ensure that the bridge design scheme is reasonable and feasible，truss type，truss plate，sway bracing，waterproof protective layer， and structural details of the bridge were studied for the design. Research conclusions ：( 1) Truss type elevation，with two times parabola curve the upper chord and the variable height of trips，can meet the needs of the bridge site，structure force and bridge landscape. (2) To four line railway steel truss bridge at about 200 m span，it is preferred to choose double trusses. (3) The lateral force transmission sway bracing with K support and the suspender， combined the orthotropic steel deck with longitudinal and transverse beams，can effectively solve the problem of excessive lateral span. (4) New composite structure system of epoxy asphalt concrete was used on ballast trough board of railway steel bridge flexible waterproof layer which can meet relevant requirements. (5) At details，”亚” type of web member section was invented to adapt the connection between sway bracing and the main truss. (6) The research conclusions can be applied to the design of railway multi line steel truss girder bridges.
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Received: 30 December 2015
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2016, Vol. 33 
