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| Type Selection of Track Structure on New Baishatuo Yangtze River Bridge of Chongqing-Guiyang Railway |
| WANG Ming-hui, LI Kai-lan |
| Chongqing-Guiyang Railway Co.Ltd, Chongqing 400014, China |
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Abstract Research purposes:Whether the reasonable track structure is adopted or not on large span steel bridge affects directly the normal running of train because a large vertical displacement and greater natural vibration frequency under loads. This paper introduced main track structure types at home and abroad, took new Baishatuo Yangtze River Bridge of Chongqing-Guiyang Railway for example, systematically analyzed the adaptability of track structure and steel bridge, determined reasonable track structure of the bridge.
Research conclusions:(1)The ballasted track structure can better adapt the deformation of steel bridge and deformation caused by the track dead load on New Baishatuo Yangtze River Bridge of Chongqing-Guiyang Railway.(2)The track ballast bed and the mechanical characteristics of the bridge axle vibration is clear, which can also better adapt the characteristics of high natural vibration frequency of the steel bridge.(3)Ease of construction and maintenance comes from the mature and stable technology of the ballasted track structure.(4)The results in this paper has a certain reference value on the selection of track structure on large span or heavy haul steel bridge.
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Received: 31 August 2014
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2014, Vol. 31 
