摘要
为确定不同捣固次数下道床横纵向阻力变化规律以及横纵向阻力之间的相关性,以湖南长株潭城际铁路有砟轨道道床为研究对象,沿线进行现场原位试验;根据试验结果,采用数据分析方法,研究不同捣固阶段道床横、纵向阻力特征。建立不同捣固阶段道床横、纵向阻力随轨枕位移变化的幂函数模型;研究结果表明:道床阻力并非随捣固次数增加而逐渐增大,捣固6遍时,道床处于限制轨枕在水平方向位移的最佳状态,道床横、纵向阻力最大;在不同捣固阶段,道床横、纵向阻力随着轨枕位移增大而增大,当轨枕位移达到4 mm左右时,道床阻力趋于稳定;不同捣固阶段道床横、纵向阻力之间均呈现强线性相关性,建议采用道床横向阻力检验指标代替道床横、纵向阻力检验指标。研究成果可为无缝线路设计、施工和养护维修提供参考。
In order to determine the change rule of lateral and longitudinal resistance of ballast bed during different tamping times and the correlation between the lateral and longitudinal resistance,the ballast bed of the intercity railway of Changsha-Zhuzhou-Xiangtan was taken as the research object.In-situ test was carried out along the line,according to the test results,the method of data analysis was used and the different ballast tamping stages of the resistance of ballast bed were studied.The power function model of lateral and longitudinal resistances of ballast bed with the change of sleepers displacement was established.The results show that the resistance of ballast bed does not increase gradually with the increase in the number of tamping,the ballast bed is in the best condition and the lateral and longitudinal resistances of ballast bed become the maximum when tamping 6 times.In different ballast tamping stages,the lateral and longitudinal resistances of ballast bed increase with the increase of displacement of sleepers,after the sleeper displacement reaches about 4 mm,resistance tends to be stable.In different ballast tamping stages,there is a strong linear correlation between lateral and longitudinal resistances of ballast bed.It is suggested that the lateral resistance test of ballast bed should be used instead of lateral and longitudinal resistance test.The research results can provide reference for design,construction and maintenance of continuously welded rail.
作者
王卫东
宋善义
颜海建
肖彬
王国术
曾志平
WANG Weidong;SONG Shanyi;YAN Haijian;XIAO Bin;WANG Guoshu;ZENG Zhiping(School of Civil Engineering,Central South University,Changsha 410075,China;The Key Laboratory of Engineering Structures of Heavy Haul Railway,Ministry of Education,Central South University,Changsha 410075,China;Fifth Engineering Company,China Railway Fourteen Bureau Group,Jining 272117,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第8期2003-2008,共6页
Journal of Central South University:Science and Technology
基金
高速铁路基础研究联合基金资助项目(U1334203)
中铁十四局集团有限公司科技开发计划课题(20160016)~~
关键词
有砟轨道
捣固遍数
道床阻力
最小二乘法
相关性分析
ballast track
number of tamping
ballast bed resistance
the least squares
correlation analysis
