严寒地区CRTSⅠ型无砟轨道板四角离缝成因研究  

Research on the Seams Genesis of CRTS-I Ballastless Track Slab' s Four Corners in Severe Cold Area

作　　者：卢炜[1] 

机构地区：[1]中国中铁股份有限公司,北京100039

出　　处：《铁道工程学报》2014年第7期53-56,88,共5页Journal of Railway Engineering Society

摘　　要：研究目的:针对严寒地区哈大客专CRTS(China railway track system)Ⅰ型轨道板与充填层砂浆四角离缝呈现规律变化的实际情况,为减少或消除四角离缝对无砟轨道结构的影响,从理论上探讨CRTSⅠ型无砟轨道板四角离缝成因,并提出应对措施,以供我国板式无砟轨道结构设计与施工参考。研究结论:(1)造成CRTSⅠ型轨道板四角离缝的主要原因是板面、板底温差引起的翘曲变形及铺轨后相邻轨道板间低高程轨道板的'空吊'现象;(2)砂浆灌注施工宜选择夜间或昼夜温差小的季节,以21:00-06:30之间为最佳,同时,应确保轨道板精调准确、扣压有效以及砂浆灌注施工充填饱满;(3)应提高轨道板调整精度,尤其是最大限度地消除相邻轨道板的高差;(4)研究成果对CRTSⅠ、Ⅱ、Ⅲ型板式无砟轨道施工减少板角离缝具有重要意义。Research purposes：Given the actual condition of the seams＇ regular change in four corners between CRTS-Ⅰ ballastless track slab of Harbin-Dalian Passenger Dedicated Line and mortar of packed layer in severe cold area,in order to reduce or eliminate the influence for ballastless track structyre from the four-comer seams,this dissertation discusses the causes of the four-corner seams of CRTS-Ⅰ ballastless track slab in theory and offers solutions for reference of design and construction of slab ballastless track structure in China.Research conclusions：（1） The main reasons for the four-corner seams of CRTS-Ⅰ ballastless track slab are the buckling deformation caused by the temperature difference between the board and the bottom and the Hanging Empty phenomenon between lower and higher tracks among adjacent slabs after track-laying.（2） The night or the season of least temperature difference between day and night would be better to do mortar pouring,and the best time is between 21：00 and 6：30.Also delicate adjustment,effective clamping force and full mortar pouring are necessary.（3） It is also necessary to improve the adjustment accuracy of the slabs,especially to maximize to eliminate the height difference of adjacent tracks.（4） This study is very useful to reduce the seams of CRTSⅠ,Ⅱ,llⅢ ballastless track slab＇s four corners.

关 键 词：CRTSⅠ型 无砟轨道 充填层 离缝 

分 类 号：U213.242[交通运输工程—道路与铁道工程]