CRTSⅡ型板式轨道砂浆快修对轨道结构受力性能的影响分析.pdfVIP

第59卷 第5期 铁 道 标 准 设 计 Vol.59 No.5 2015年5月 RAILWAY STANDARD DESIGN May2015 文章编号:1004 2954(2015)05 0065 05 CRTSⅡ型板式轨道砂浆快修对轨道结构 受力性能的影响分析 刘笑凯, 杨荣山, 潘国瑞, 杜华杨 (西南交通大学高速铁路线路工程教育部重点实验室,成都 610031) 摘 要:以CRTSⅡ型板式无砟轨道结构为研究对象,结合现有的砂浆快修技术,建立CRTSⅡ型板式无砟轨道快修 砂浆的力学模型,采用有限元方法,计算列车荷载单独作用、正温度梯度和列车荷载共同作用以及负温度梯度和列 车荷载共同作用3种工况下轨道板的最大拉、压应力,砂浆层最大垂向压应力和快修砂浆层以及轨道板的最大垂 向位移。 计算结果表明,在各种荷载的作用下,快修砂浆处的轨道结构受力均能够达到正常投入使用的标准,并且 快修砂浆的应力值未超过其2h 强度值3MPa,因此不需要对维修的轨道进行临时支护。 关键词:CRTSⅡ型板式无砟轨道; 轨道维修; 快修砂浆; 温度梯度 + 中图分类号:U213.2 44 文献标识码:A DOl:10.13238/ j.issn.1004-2954.2015.05.014 Analysis of the Effect of Fast Mortar Repairing of CRTSⅡ Slab Track on the Performance of Track Structure LIU Xiao-kai,YANG Rong-shan,PAN Guo-rui,DU Hua-yang (MOE Key Laboratory of High-speed Railway Engineering,Southwest Jiaotong University,Chengdu610031,China) Abstract:This paper focuses on CRTS II slab ballastless track and establishes a CRTSⅡslab track fast mortar repairing mechanical model based on the existing fast mortar repairing technology. The finite element method is employed to calculate the maximum tensile stress and compressive stress of the track slab,the maximum vertical compressive stress of mortar layer and the maximum vertical displacement of fast mortar repairing layer and track slab under such combined three conditions as independent action of train load, interaction of positive temperature gradient and train loads and interaction of negative temperature gradient and train loads. The calculation results show that under different loads,the track structural stress of fast repairing mortar meets the normal