DOI: 10.11908/j.issn.0253-374x.2019.06.012

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中图分类号: U216


基金项目: 国家自然科学基金项目（51678445）；同济大学“中央高校基本科研业务费专项资金”（22120180239）




Damage Propagation Laws of Subgrade CRTSⅡSlab Track Under Displacement Correction
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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.



Abstract: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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