长三角地区高铁无砟轨道桥上小阻力扣件设置标准研究  

Study on Setting Standard of Small Resistance Fastenings on Ballastless Track of High-speed Railway Bridge in Yangtze River Delta

作　　者：谭社会 张泽 戴宗林 TAN Shehui;ZHANG Ze;DAI Zonglin(China Railway Shanghai Group Co.,Ltd.,Shanghai 200071,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中国铁路上海局集团有限公司,上海200071 [2]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道标准设计》2025年第2期25-29,50,共6页Railway Standard Design

基　　金：中国铁路上海局集团有限公司科技研发课题(2022108,2021141,2021142);中铁第四勘察设计院集团有限公司科技研发课题(2021K004)。

摘　　要：TB10015—2012《铁路无缝线路设计规范》规定小阻力扣件的铺设位置、长度应通过计算确定。目前设计单位在大跨桥上小阻力扣件的设置原则、铺设范围上存在较大差异。基于此,以长三角范围内的高速铁路无砟轨道为研究对象,考虑该区域最不利温度条件及最不利线路条件,基于梁轨相互作用理论,建立不同温度跨度常用连续梁桥上无缝线路计算模型,分析4种小阻力扣件方案下的无缝线路受力特征,提出长三角范围内的小阻力扣件铺设原则。研究得出以下结论:长三角地区温度跨度介于120~200 m的桥梁应铺设小阻力扣件;当120 m≤温度跨度<160 m时,采用连续梁边跨+相邻1跨简支梁的方案;当160 m≤温度跨度<200 m时,采用连续梁全桥+左右各2跨简支梁的铺设方案。TB10015—2012 Code for Design of Railway Continuous Welded Rail stipulates that the laying position and length of small resistance fasteners shall be determined by calculation.The setting principles of small resistance fasteners on long-span bridges calculated and determined by various design units are not uniform,and the laying range is quite different.By taking the ballastless track line within the Yangtze River Delta as the research object and considering the most unfavorable temperature conditions and the most unfavorable line conditions for train operation in the region,the calculation model of CWR on the continuous bridge with different temperature spans is established based on the beam-rail interaction theory,the stress characteristics of CWR under four small resistance fastening schemes are studied,and the laying principle of small resistance fasteners is proposed.The following conclusions are drawn from the study:bridges with temperature span from 120 to 200 m in the scope of Yangtze River Delta should be laid with small resistance fasteners;It is suggested that when 120 m≤temperature span<160 m,the small resistance fasteners should be laid on the side span of continuous bridge and 1-span simply-supported beam;when 160 m≤temperature span<200 m,the small resistance fasteners should be laid on the whole continuous bridge and 2-span simply-supported beams on each side.

关 键 词：高速铁路 连续梁桥 无砟轨道 无缝线路 小阻力扣件 设置标准 

分 类 号：U238[交通运输工程—道路与铁道工程] U213.9