中南大学学报（自然科学版）2024，Vol.55Issue(6)：2404-2413,10.DOI:10.11817/j.issn.1672-7207.2024.06.030
齿轨铁路桥上板式无砟轨道纵向力学特性研究
Study on longitudinal mechanical properties of slab ballastless track on bridge with rack railway
摘要
Abstract
In order to study the longitudinal mechanical characteristics of CRTS III slab track laid on bridge with rack railway,a fine analysis model of rack-slab track-bridge was established based on the finite element theory and the plastic damage theory of concrete.The results show that the position of the end of the track plate on the uphill side is the most unfavorable position of the load.CRTS III slab track can be directly applied on the track line with slope less than 150‰,and the slab will cause local damage when the slope is greater than 150‰.When the overall temperature variation is 15-25℃,the damage of the slab is greater.The growth rate of longitudinal displacement of the track gradually decreases with the increase of the slope,and the displacement of the base has the largest growth rate.The maximum displacement of the track is about 1.6 mm when the slope is 150‰.The maximum compression of the groove of the base is 0.52 mm.In order to enhance the groove limiting ability,the cushion stiffness on the upper and lower slopes of the groove can be adjusted.The constraint between the track and the bridge is insufficient.For the relatively unstable layer,longitudinal stability measures such as increasing the chiseling degree of the bridge and adjusting the specifications of the embedded steel bars should be taken.关键词
齿轨铁路/无砟轨道/线路坡度/纵向受力/纵向位移/层间变形Key words
rack railway/ballastless track/line slope/longitudinal force/longitudinal displacement/interlayer deformation分类
交通工程引用本文复制引用
孔超,辛涛,刘宗峰,王森,陈波,王宏阁..齿轨铁路桥上板式无砟轨道纵向力学特性研究[J].中南大学学报（自然科学版）,2024,55(6):2404-2413,10.基金项目
国家重点研发计划项目(2022YFB2602905) （2022YFB2602905）
111引智基地项目(B20040)(Project(2022YFB2602905)supported by the National Key Research and Development Program of China （B20040）
Project(B20040)supported by the 111 Project （B20040）
