Track Geometry Variation Law of Bianyuzhou Yangtze River Bridge
Bianyuzhou Yangtze River Bridge is critical works of the Anqing-Jiujiang Section of Beijing-Hong Kong HSR.It features a high design speed,substantial live loads,and stringent technical requirements.As the steel box-concrete composite girder cable-stayed bridge with the largest span in China,the bridge exhibits significant mechanical performance under the influence of complex external environments,which can affect the upper track structure.To ensure the long-term safe and stable operation of the railway,this paper conducts a systematic study on the track geometry variation law of Bianyuzhou Yangtze River Bridge.Based on the dynamic inspection data of the track on the Bianyuzhou Yangtze River Bridge,this paper analyzes the track geometric characteristics throughout the complete high-temperature and low-temperature cycles and evaluates track geometry by calculating the standard deviation of individual geometric parameters and the track quality index.The results indicate that the overall service condition of the bridge is good,meeting the track geometry quality management requirements in China.However,special attention should be given to the geometric condition changes in the bridge end areas of the main navigable span.
long-span bridgeBianyuzhou Yangtze River Bridgetrack dynamic inspection datatrack geometrytrack quality index
NETL
NSTL
万方数据
