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| Overall Designof Hanjiang River Super LargeBridgeof Mengxi - Central China Railway |
| XU San – ping |
| (China Railway Siyuan Survey and Design Group Co. Ltd，Wuhan，Hubei 430063，China) |
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Abstract Abstract:Research purposes: Our country has well - developed river system and numerous rivers. When the railway crosses large navigable river，bridge site selection is influenced by route selection，connection condition，navigation and flood control，project investment，construction，maintenance，and social benefits; the selection of bridge types should not only meet the functional requirements and technical standards，but also should consider the technical and economic indexes，construction organization and landscape effects. Combined with the results of the bridge site and type selection， main bridge design of Hanjiang River super large bridge of Mengxi - Central China Railway，this paper focuses on bridge type scheme determination of large bridge and main bridge design of heavy haul railway low - pylon cable - stayed bridge. Research conclusions : Through the choice of bridge site，determination of bridge type scheme and the design of main bridge on the Hanjiang River Bridge of Mengxi - Central China Railway，the research results show that: (1) The bridge site of large bridge across the river bridge is influenced by channel conditions，navigation requirements，large complex structure stress and other factors，so the adjacent line should take from the bridge site selection. (2) The selection of bridge site should be combined With the adjacent flood control，navigation requirements，port conditions，water features， local planning requirements， river crossing construction safety distance. (3) The bridge type is comprehensively selected from the aspects of technology，economy， construction organization and landscape effect under the premise of meeting the functional requirements and technical standards. (4) The design of heavy haul railway should have large live load and high fatigue requirements $ and cable - stayed bridge design should focus on the research on the structure strength, fatigue and subsequent creep. It is safe and reliable for the low - pylon cable - stayed bridge of the Hanjiang River super large bridge of Mengxi - Central China Railway. (5 ) The research results can be applied to the design of large span bridge and the design of heavy haul railway cable - stayed bridge.
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Received: 06 September 2016
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2016, Vol. 33 
