高速铁路大跨度桥梁轨道静态长波不平顺设计控制参数研究  

Study on Design Control Parameters of Static Long-wave Irregularity of Long-span High-speed Railway Bridge Track

作　　者：陈良江 孙宗磊 严爱国[3,4] 郭远航 杨得旺[3,4] CHEN Liangjiang;SUN Zonglei;YAN Aiguo;GUO Yuanhang;YANG Dewang(China Railway Economic and Planning Research Institute,Beijing 100038,China;Engineering Design Appraisal Center,China State Railway Group Co.,Ltd.,Beijing 100844,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Bridge Engineering Laboratory,China Railway Construction Corporation Limited,Wuhan 430063,China)

机构地区：[1]中国铁路经济规划研究院有限公司,北京100038 [2]中国国家铁路集团有限公司工程设计鉴定中心,北京100844 [3]中铁第四勘察设计院集团有限公司,湖北武汉430063 [4]中国铁建股份有限公司桥梁工程实验室,湖北武汉430063

出　　处：《铁道学报》2024年第4期177-183,共7页Journal of the China Railway Society

基　　金：中国国家铁路集团有限公司科技研究开发计划(N2021G034);中国铁建股份有限公司2020年度科技重大专项(2020-A01);中铁第四勘察设计院集团有限公司科研课题(2022K084)。

摘　　要：我国现行高速铁路设计、验收规范中,采用300 m基线150 m矢距差法对轨道长波不平顺性进行评价。对于大跨度桥梁,受温度变化、混凝土收缩徐变等多种因素影响,桥上轨道线形随温度变化而发生动态变化,仍沿用规范的评价方法,难以与桥梁固有变形特性相适应。通过分析我国现行高速列车敏感波长,结合多座大桥运营监测结果及不同弦长的有效测量范围,确定选用60 m中点弦测法评价大跨桥梁轨道长波不平顺性;通过仿真及实测手段,得到列车速度为250、300、350 km/h时60 m中点弦测法平顺性控制限值。多座高速铁路大跨度桥梁工程实践表明,60 m中点弦测法适用性较好,可供今后高速铁路大跨度桥梁设计、验收参考。In the current design and acceptance standards for high-speed railways in China,the 300 m baseline and 150 m external distance difference method are used for the long-wave irregularity evaluation of the tracks of high-speed railways(HSR)in China.However,such evaluation methods are inadaptable to the inherent deformation characteristics of long-span bridges,with the dynamic changes of the track alignment with temperature variation and concrete shrinkage and creep.The 60 m midpoint chord measurement method was determined to evaluate the long-wave irregularity of long-span bridge track,via the sensitive wavelength analysis of current high-speed trains in China,coupled with monitoring results during operation period of several long-span HSR bridges and the effective measurement range of different chord lengths.By simulation and measurement methods,the regularity control limits at 250 km/h,300 km/h,and 350 km/h by the 60 m midpoint chord measurement method were obtained.The engineering practice of multiple long-span bridges shows that the 60 m midpoint chord measurement method,with good applicability,can be referred to in the future design and acceptance of long-span HSR bridges.

关 键 词：高速铁路 大跨度桥梁 长波不平顺 中点弦测法 

分 类 号：U213.2[交通运输工程—道路与铁道工程]