路基上CRTSⅡ型板式轨道纠偏作业损伤扩展规律
Damage Propagation Laws of Subgrade CRTSⅡSlab Track Under Displacement Correction
投稿时间:2018-07-09  修订日期:2019-03-26
DOI:10.11908/j.issn.0253-374x.2019.06.012     稿件编号:    中图分类号:U216
 
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中文摘要
      基于纠偏作业工艺,建立了路基上中国铁路轨道系统(CRTS)Ⅱ型板式轨道有限元模型,研究轨道板宽窄接缝离缝、轨道板砂浆层离缝、支承层裂纹在纠偏作业中的扩展规律.结果表明:宽窄接缝离缝会减弱轨道板宽窄接缝粘结界面抵抗损伤的能力;砂浆层离缝对轨道板砂浆层粘结界面损伤的影响较小;支承层裂纹在纠偏作业过程中会进一步向支承层内部扩展.
英文摘要
      Based on the displacement correcting method, the China railway track system(CRTS)Ⅱslab track was modelled in a finite element software. The damage propagation laws of wide and narrow joint separation, mortar-layer separation and supporting-layer cracks during the correction process are studied. The results show that the wide and narrow joint separation would decrease the ability to resist damage of the bonding interface; the mortar-layer separation made little influence on bonding interface; the supporting-layer cracks would grow deeper into the inside of the supporting-layer during the correction process.
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