铁道科学与工程学报2017，Vol.14Issue(6)：1146-1152,7.
山区高速铁路桥梁−无砟轨道系统关键技术试验研究
Experimental research on key technology of mountainous high speed railway bridge-slab track system
摘要
Abstract
Mountainous railway lines, represented by the Fujian-Jiangxi section of Beijing-Fuzhou passenger dedicated line, have features like strong solar radiation, changeable climate and complex terrain and geological conditions and they normally have a large number of bridges and tunnels.In view of the environmental and structural features of mountainous high-speed railway bridge-slab track system, the box girder-slab track temperature field test, rail nonlinear temperature distribution test of bridge-tunnel transition section and bridge-double block slab track dynamic response test under the action of the train were carried out. Result shows that: considering the temperature field distribution of the box girder-slab track is nonlinear, the box girder roof temperature gradient can be fitted to exponential function and the bottom temperature gradient to linear function based on China's railway specification; there is a large temperature difference in the rail longitudinal direction of bridge-tunnel transition section, and the temperature amplitude can be up to?5~21℃; the structural vertical acceleration caused by train operation reduces in turn from rail, track slab, track bed slab to the bridge deck, and energy dissipation effect of track structure is obvious.关键词
铁路桥梁/高速铁路/无砟轨道/关键技术/试验研究Key words
railroad bridges/high-speed railway/slab track/key technology/experimental study分类
交通工程引用本文复制引用
刘来明..山区高速铁路桥梁−无砟轨道系统关键技术试验研究[J].铁道科学与工程学报,2017,14(6):1146-1152,7.基金项目
中国铁路总公司科技研究开发计划重点课题(2014G001-D) （2014G001-D）
国家自然科学基金资助项目(51268016) （51268016）
