哈大高速铁路路基冻胀区轨道不平顺特征分析  

Characteristic Analysis of Track Irregularity in Subgrade Frost Heave Area of Harbin-Dalian High-speed Railway

作　　者：赵国堂 刘秀波[2] 高亮[3] 蔡小培[3] 

机构地区：[1]中国铁路总公司,北京100844 [2]中国铁道科学研究院基础设施检测研究所,北京100081 [3]北京交通大学土木建筑工程学院,北京100044

出　　处：《铁道学报》2016年第7期105-109,共5页Journal of the China Railway Society

基　　金：国家自然科学基金(51578053,61134003);中国铁路总公司科研试验(Z2013-038-4)

摘　　要：路基冻胀会导致无砟轨道产生结构变形,引起轨道不平顺,直接影响列车的安全、平稳运行。为研究路基冻胀变形作用下无砟轨道不平顺的特征,本文基于综合检测列车测得的动态轨道不平顺数据,利用轨道不平顺波形图、轨道不平顺累积分布和轨道不平顺谱等方法,分析了哈大高速铁路路基冻胀及冻融前后轨道不平顺变化规律。研究结果表明:路基地段高低不平顺波长等于底座板和轨道板跨度,桥梁地段高低不平顺波长等于桥梁跨度;冻胀对路基地段波长10m以上的高低和水平不平顺影响较大,对中长波轨向不平顺稍有影响,对其他影响较小;冻土融化后轨道不平顺能基本恢复到初始状态,每年的同时期冻胀引起的高低不平顺位置、形状和幅值具有再现性。Subgrade frost heaving will result in deformation of ballastless track structures,causing track irregularity and affecting the safety and sperling of the train directly.To study the effect of the frost heave on track irregularity,based on the track irregularity data from comprehensive monitoring train,track irregularity graph,track irregularity cumulative distribution and track irregularity spectrum were used to analyze the track irregularity characteristics of Harbin-Dalian high-speed railway.The results showed that the wavelength of vertical irregularity of the subgrade was equal to the span of base plate and track slab,while the wavelength of vertical irregularity of bridge section was equal to bridge span.Frost heave imposed greater influence on level and vertical irregularity whose wavelength was over 10 m,less effect on irregularity with mid/long-wave alignment and little influence on irregularity with other wavelengths.Track irregularity can almost return to initial state after the thawing of frozen soil.The position,shape and amplitude of vertical irregularity caused by frost heave in the same period of each year are reproducible.

关 键 词：高速铁路 高寒地区 无砟轨道 冻胀 轨道不平顺谱 

分 类 号：O213.21[理学—概率论与数理统计]