纠偏对CRTSII型板式无砟轨道结构影响分析被引量：4

Analysis of influence of rectification on CRTSII slab ballastless track structure

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摘要以纠偏对CRTSII型板式无砟轨道结构影响程度为研究目标,利用有限元软件ABAQUS建立无砟轨道结构力学分析模型,通过实测结果对模型的可靠性进行验证,分析单点顶推纠偏、多点顶推联合纠偏对CRTSII型板式无砟轨道结构各层受力与变形的影响。研究结果表明:1)纠偏范围从12 m变化至60 m时,单点顶推单次最大纠偏量由0.19 mm增加至1.34 mm;2)纠偏范围为60 m时,纠偏温降从0℃变化至−40℃,则单点顶推单次最大纠偏量由1.34 mm增加至2.12 mm,单点顶推临界最大温降幅度为−4.4℃,对应最大纠偏量为1.44 mm;3)多点顶推联合纠偏时,随着顶推间距由2 m增加至3 m,轨道板、CA砂浆和支承层的纠偏量分别减少1.25%,1.28%和1.32%,而轨道板和支承层的拉应变分别减少8.72%和12.14%,顶推间距3 m时轨道结构受力更有利。 This paper tookthe influence of rectification on CRTSII slab ballastless track structure as the research objective.The finite element software ABAQUS was used to establish a ballastless track structure mechanics analysis model.The reliability of the model was verified through the actual measurement results,and the influence of single-point push and multipoint incremental launching on the force and deformation of each layer of CRTSII slab ballastless track structure were analyzed.The results show that:1)When the change of rectification distance is from 12 m to 60 m,the maximum rectification for a single point push increases from 0.19 mm to 1.34 mm;2)When the rectification distance is 60 m,the rectification temperature drop changes from 0℃to-40℃,and the maximum rectification for a single point push is increased from 1.34 mm to 2.12 mm.The critical maximum temperature drop of incremental launching is-4.4℃,corresponding to the maximum rectification of1.44 mm;3)As the distance of multipoint incremental launching increases from 2 m to 3 m,the maximum rectification of the track slab,CA mortar and support are reduced by 1.25%,1.28%and 1.32%,respectively,while the tensile strain of the track slab and the support are reduced by 8.72%and 12.14%,respectively.When the incremental launching distance is 3 m,the track structure is more favorable.

作者刘竞李书明潘永健申石文崔政清曾志平 LIU Jing;LI Shuming;PAN Yongjian;SHEN Shiwen;CUI Zhengqing;ZENG Zhiping(Railway Engineering Research Institute,China Academy of Railway Sciences,Beijing 100844,China;State Key Laboratory for Track Technology of High-speed Railway,Beijing 100081,China;School of Civil Engineering,Central South University,Changsha 410075,China;China Railway Shanghai Group Co.,Ltd.,Nanjing Bridge Section,Nanjing 210015,China)

机构地区中国铁道科学研究院集团有限公司铁道建筑研究所高速铁路轨道技术国家重点实验室中南大学土木工程学院中国铁路上海局集团有限公司南京桥工段

出处《铁道科学与工程学报》 CAS CSCD 北大核心 2021年第8期1943-1950,共8页 Journal of Railway Science and Engineering

基金中国铁路总公司科研开发课题(2017G002-D) 中国铁道科学研究院基金资助项目(2019YJ051)。

关键词高速铁路 CRTSII型板式无砟轨道纠偏顶推 high-speed railway CRTSII slab ballastless track rectification incremental launching

分类号 U216.9 [交通运输工程—道路与铁道工程]