106
D0I:10. 7672/sgjs2016170106
术
施
工技
CONSTRUCTION TECHNOLOGY
CRTSⅢ型板式无咋轨道自密实混凝土
施工工艺优化及应用
樊齐曼'，谭盐宾2
（1.京流铁路客运专线辽宁有服责任公司，辽宁沈阳
申110006；2.中国铁道科学研究院，北京
2016年9月上第45卷：
第17期
100081)
【摘要】为提升CRTS皿型板式无诈轨道自密实混凝土施工质量，研究了自密实混凝土灌注方式和模板设计与安装方面的优化措施。结果表明，与轨道板中间孔单点灌注相比，轨道板侧向灌注和预制孔两点灌注能有效缩短灌注时间，但两点灌注方式易在结构内形成空润，不宜采用：模板转角处设置排气孔比现有方式更利于排气和避免质量缺陷；通过在模板与轨道板间增设厚度1.5~2.0mm的垫片，可有效解决施工过程中的模板四周排气问题。工程应用结果验证了优化措施的有效性。
【关键调】铁道工程；CRTS重板式无碎轨道；自密实混凝土；施工工艺：优化
【中图分类号】U213.2*44
【文献标识码】A
[文章编号】1002-8498(2016)17-0106-03
Optimization and Application of Construction Technology for Self-compactingConcreteinCRTSIISlabBallastlessTrack
Fan Qimin',Tan Yanbin?
(1.Bejing to Shenyang Passenger Dedicated Lines Ligoning Co,,Lud.,Shenyang, Ligoning
110006,China;
2. China Academy of Railsay Sciences, Bejing 100081,Chine)
Abstract: In order to improve the construction quality of self-compacting concrete in CRTS II slab ballastless track, optimization measures for casting ways of self-compacting concrete and formwork design and installation were studied. The results show that both casting from one hole on the side direction of track slab and from two holes on the surface of track slab can shorten the casting time, comparing to the traditional casting way by the middlehole of the surfaceof track slab.But the way of casting from two holes on the surface of track slab can form cavities in the structure, so it is not recommended. Exhaust vent on the corner of the formwork is more facilitate to release the air in structure and avoid the quality defects occurring on the casting process of self-compacting concrete than existing way of setfor exhaust vent. Problem of exhaust around the formwork can be solved by adding gaskets with thickness 1.5 2. Omm between formwork and track slab. The effectiveness of the optimization measures was verified by application in Shenyang to Dandong passenger dedicated lines
Key words:railroads;CRTSII slab ballastless track ; self-compacting concrete; construction; optimization
工程概况和结构特点
沈阳一丹东铁路客运专线（简称“沈丹客专”）位于辽宁省中东部，设计时速250km，正线长 205.709km，全线采用具有我国自主知识产权的 CRTSⅢ型板式无确轨道结构。沈丹客专起于沈阳，
*中国铁路总公司重大科研项目（2014G001-C)）；科技部科研院所专项基金（2014EG123029）
【作者简介】类齐要，高级工程师，E-mail：fanqimin2005@163.com【通讯作者］课盐实，硕士，副主任，副研究员，E-mail：ybtan1981@ 126.com
【收稿日期】2015-08-20 万方数据
经过本溪、风凰城，终到丹东，贯通辽东南地区，全线正线桥梁总数92座，总长76.178km；隧道共计58 座，总延长90.115km；路基长39.416km。
沈丹客专的典型结构特点如图1所示，在结构设计上，轨道板与其下部自密实混凝土层为复合整体受力结构，要求后施工的自密实混凝土与轨道板紧密黏结形成复合结构，共同承受列车荷载作用。自密实混凝土层为单元结构，长度和宽度同轨道板，厚100mm，采用强度等级C40自密实混凝土现