高铁大跨度悬索桥轨道长波不平顺测量及控制

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Abstract Research purposes:The Wufengshan Yangtze River Bridge on the Lianyungang-Zhenjiang Railway is the world's first steel truss girder railway suspension bridge. When the current vector distance difference method is used to measure the static high and low long-wave irregularity of the track, it does not meet the specification limit standard. On the basis of analyzing the existing static measurement methods of track irregularity, according to the characteristics of Wufengshan Yangtze River Bridge, the method of combining theoretical analysis and measured data is used to propose a long-span railway suspension bridge measurement method and control standard for track irregularity, which provides technical support for bridge acceptance and maintenance.
Research conclusions:(1) It is recommended to use 60 m chord length continuous midpoint chord measurement method to measure the long-wave irregularity of the Wufengshan Yangtze River Bridge track. (2) The static long-wave irregularity of Wufengshan Yangtze River Bridge is controlled according to the four-level standards of operation acceptance, regular maintenance, planned maintenance, and temporary repair. The limit values of irregularity at 250 km/h are 10 mm, 12 mm, 20 mm and 28 mm respectively. (3) Under the condition of temperature load fitting longitudinal section, the maximum chord length irregularity of Wufengshan Yangtze River Bridge is 10 mm, which meets the requirements of operation acceptance limit. (4) It is recommended to strengthen operation monitoring, further carry out special research on bridge and line maintenance, and formulate targeted maintenance rules and standards.(5) The research results can be applied to the survey, design, acceptance, operation and maintenance of long-span suspension bridges on high-speed railways.

Key words： long span suspension bridge long wave ride comfort center chord measurement method control standard

Received: 26 September 2022

PACS:

U212

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	ZHANG Jian
	LONG Xuyou
	WANG Huiyong

Cite this article:

ZHANG Jian,LONG Xuyou,WANG Huiyong. Measurement and Control of Long Wave Track Irregularity of Long-span Suspension Bridge on High-speed Railway[J]. Journal of Railway Engineering Society, 2023, 40(2): 6-11.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2023/V40/I2/6

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