Abstract：Research purposes: To alleviate the expansion of CRTS Ⅱ track slab under high temperature and reduce the expansion-oriented temperature force caused by the restricted deformation of track slab fundamentally, it is necessary to study the stress-relief technology of CRTS Ⅱ track slab in depth. With the analysis of the track-slab structural characteristics in the application scenario of bridge and subgrade, together with the design experience of track slabs in the turnout area, the scheme of continuous track-slab unitization and weak longitudinal connection is proposed. After that, the key parameters are obtained by the analytical method and finite element simulation. Based on the established finite element model, the control scheme after unitization is studied, and the evaluation method together with the allowing superior limit of camber is put forward. Research conclusions: (1) The stress characteristics of CRTS Ⅱ track slab in subgrade and bridge section are basically the same under high temperature. The critical wavelength of the camber under damage state is determined as 19 m by the analytical method, and the scheme of three-slab unitization is preferred for unlocking. (2) The influence of partial/full filling in wide-narrow joints on the elastic modulus of low-elastic-modulus high-toughness materials is analyzed. It is concluded that the full filling scheme is more favorable to the value-range selection of filling-material elastic modulus. (3) When the track slab is unitized, the uniform planting of reinforcement is more conducive to limit the movement of track plate under high temperature. (4) The method of identifying track camber on the basis of the height variation of rail surface and the height difference variation of rail bottom slab is proposed. It is found the sections where the height variation of rail surface is greater than 2 mm in high-temperature season should be paid more attention.(5) The research result can provide technical support for camber regulation of continuous slab track.
谭社会.高温条件下CRTSⅡ型板式无砟轨道变形整治措施研究[J].铁道建筑,2016(5):23-27.Tan Shehui. Study on Deformation Treatment Measures for CRTS Ⅱ Slab-type Ballastless Track in High Temperature Condition[J]. Railway Engineering, 2016(5): 23-27.
[2]
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(5):36-40.Zhong Yanglong, Zhu Jianhua, Gao Liang, etc. Research on the Treatment of Temperature Force Release of CRTS Ⅱ Slab Ballastless Track on Bridge[J].Journal of Railway Engineering Society,2021(5):36-40.
[3]
徐凌雁,徐鹏,谢剑.砂浆粘结软化对纵连轨道板热屈曲的影响[J].铁道工程学报,2021(4):38-43.Xu Lingyan, Xu Peng, Xie Jian. The Effect of Mortar Bonding Softening on Thermal Buckling of Longitudinal Connected Track Slab[J]. Journal of Railway Engineering Society,2021(4):38-43.
[4]
梁延科,徐凌雁,寇胜宇,等.柔性材料在CRTSⅡ型轨道板上拱整治中的应用[J].铁道建筑,2021(1):105-108.Liang Yanke, Xu Lingyan, Kou Shengyu, etc. Application of Flexible Material in the Upwarp Regulation of CRTS Ⅱ Track Slab[J]. Railway Engineering,2021(1):105-108.
[5]
蔡小培,钟阳龙,阮庆伍,等.混凝土塑性损伤模型在无砟轨道非线性分析中的应用[J].铁道学报,2019(5):109-118.Cai Xiaopei, Zhong Yanglong, Ruan Qingwu, etc. Application of Concrete Damaged Plasticity Model to Nonlinear Analysis of Ballastless Track[J].Journal of the China Railway Society, 2019(5):109-118.
[6]
TB 10082—2017,铁路轨道设计规范[S].TB 10082—2017, Code for Design of Railway Track[S].
[7]
TG/GW 115—2012,高速铁路无轨道线路维修规则[S].TG/GW 115—2012, Maintenance Rules for Ballastless Track of High-speed Railway[S].
[8]
姜子清,施成,赵坪锐.CRTSⅡ型板式无砟轨道砂浆层离缝检查及伤损限值研究[J].铁道建筑,2016(1):53-58.Jiang Ziqing, Shi Cheng, Zhao Pingrui. Crack Detecting of Mortar Layer for CRTS Ⅱ Slab-type Ballastless Track and Its Damage Limit[J].Railway Engineering, 2016(1):53-58.
[9]
李邦旭,刘亮,孙坤.板式无砟轨道离缝病害无损检测方法试验研究[J].铁道建筑,2018(2):121-124.Li Bangxu, Liu Liang, Sun Kun. Experimental Study on Non-destructive Test Method for Debonding of Slab Ballastless Tracks[J].Railway Engineering, 2018(2):121-124.
2022, Vol. 39 
版权所有 © 2014 《铁道工程学报》编辑部