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Wang M.-H.,Chongqing Guiyang Railway Co. | Li K.-L.,Chongqing Guiyang Railway Co.
Journal of Railway Engineering Society

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. ©, 2014, Journal of Railway Engineering Society. All right reserved. Source

Wang M.-H.,Chongqing Guiyang Railway Co. | Li X.-Q.,China Railway Eryuan Engineering Group Co. | Li D.-B.,Chongqing Guiyang Railway Co. | Zhang Q.,Chongqing Guiyang Railway Co.
Journal of Railway Engineering Society

Research purposes: Because of the characteristic including complex topography and geology, high proportion of bridge and tunnel, more high risk working points, difficult management of altered design, meanwhile, because of using more innovative technology in the construction process, the supervision of mountainous high speed railway has the particularity of technology and organization management. Combined with the main problems of current supervision, the paper analysed and thought how to implement the management target including safety, quality, investment, construction period, environment protection, stability in the construction of mountainous high speed railway. Research conclusions: (1)Safety risk control is an important content of supervision work. (2)The supervision company must take part in the practical process of technological innovation actively. (3)Key posts such as the chief supervision engineer and group leader of a section, must have rich experience, and the supervision company must hold regular training for the supervising engineers. (4)The matrix supervision organization is more suited to supervision of the mountainous high speed railway . (5)The domestic installation and work facilities of supervisors must accord with building a clean environment and the feature of mountain area. (6)Control the quality of transition section strictly. (7)Strengthen the information construction, control the supervising condition and personnel position of every worksite strictly. (8)strengthen the environment supervision, control the sensitive worksites emphatically. (9)Adaptation to local conditions and innovation management is important guarantee to complete the supervision of mountainous high speed railway. Source

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