桥上CRTSⅡ型板式无砟轨道温度力释放整治研究

钟阳龙; 朱建华; 高亮; 宋天昊; 赵闻强; 仝凤壮; 黄伊琛

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铁道工程学报 ›› 2021, Vol. 38 ›› Issue (5) : 36-40.

长大干线: 线路与轨道

桥上CRTSⅡ型板式无砟轨道温度力释放整治研究

钟阳龙^**, 朱建华, 高亮, 宋天昊, 赵闻强, 仝凤壮, 黄伊琛

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Research on the Treatment of Temperature Force Release of CRTSⅡ Slab Ballastless Track on Bridge

ZHONG Yanglong, ZHU Jianhua, GAO Liang, SONG Tianhao, ZHAO Wenqiang, TONG Fengzhuang, HUANG Yichen

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摘要

研究目的: 为从根本上解决CRTSⅡ型板式无砟轨道在冬季离缝夏季上拱问题,本文提出具有可行性的将纵连式轨道结构解锁成全单元结构的温度力释放方案,引入内聚力单元和混凝土损伤塑性本构建立无砟轨道温度力释放分析模型,分析不同整治方案的温度适应性,并设计全单元方案的纵横向限位方式。
研究结论: (1)弱纵连方案存在轨道结构上拱病害隐患,不能有效地释放轨道结构的温度力;(2)全单元结构能够很好地适应极端温度条件,是一种可行的温度力释放方案;(3)采用全单元方案进行解锁后的轨道结构能够很好地保证横向稳定性,采取灌浆孔植入钢棒方式能保证良好的纵向稳定性;(4)本研究成果可为无砟轨道上拱病害整治提供借鉴和参考。

Abstract

Research purposes: In order to fundamentally solve the problem of the CRTS Ⅱ slab ballastless track gap in winter and arching in summer, a feasible scheme is proposed in this paper, which is unlocking the longitudinally connected track structure into full-unit structure to release temperature force. Based on the cohesive model and the concrete damaged plasticity model, a temperature force release analysis model of CRTSⅡ ballastless slab track was established. The temperature adaptability of different treatment schemes was analyzed and the vertical and horizontal position-limitation methods of full-unit scheme were put forward.
Research conclusions: (1) The weak longitudinal connection scheme has potential hazard of buckling deformation of the track structure and can't effectively release the temperature force of the track structure. (2) The full-unit structure can well adapt to the extreme temperature conditions, which is a feasible temperature force release scheme. (3) The full-unit track structure can ensure the lateral stability, and the method of implanting steel rods into slab grouting holes can ensure longitudinal stability reliably. (4) The research results can be used as reference for treatment of ballastless track upward.

导出引用

钟阳龙, 朱建华, 高亮, 等. 桥上CRTSⅡ型板式无砟轨道温度力释放整治研究[J]. 铁道工程学报, 2021, 38(5): 36-40

ZHONG Yanglong, ZHU Jianhua, GAO Liang, et al. Research on the Treatment of Temperature Force Release of CRTSⅡ Slab Ballastless Track on Bridge[J]. Journal of Railway Engineering Society, 2021, 38(5): 36-40

中图分类号： U213.2

参考文献

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基金

基本科研业务费重大项目(2019JBZ002);国家自然科学基金(51908031,U1734206);中国铁路总公司科技研究开发计划课题(P2018G005-4);高速铁路轨道技术国家重点实验室(中国铁道科学研究院集团有限公司)开放基金资助项目(2019YJ197);轨道交通控制与安全国家重点实验室(北京交通大学)重点课题(RC2019ZZ006);中国铁路总公司科技研究开发计划课题(N2018G071)