硅酸盐通报2018，Vol.37Issue(6)：2042-2047,2052,7.
大温差戈壁地区高速铁路无砟轨道混凝土开裂研究
Experimental Study on the Cracking of Concrete about the High Speed Railway in Big Temperature Difference Area of Gobi
摘要
Abstract
In view of the early crack and other durability problems of concrete slab of ballast bed after the construction of LanXin second-line ballastless track, 1:1 full-scale model tests in laboratory simulation. Using artificial climate simulation box to simulate the great temperature difference in Northwest China, the cracking mechanism of ballastless track slab of ballastless track is studied from the aspects of distribution, variation and deformation of early hydration heat field, establishing the relationship between the temperature field of concrete hydration temperature and the atmospheric temperature environment in Northwest China.At the same time, the temperature field of hydration heat is simulated by finite element software, and the calculated results are compared with the indoor test results.The results show that: The large temperature difference and abominable environment are the main causes of the cracking of the bed slab.The temperature field and the environmental temperature change periodically.Closer to the surface of bed plate, the larger temperature gradient is, the more likely to create cracks.关键词
大温差/无砟轨道/温度场/有限元Key words
large temperature difference/ballastless track/temperature field/finite element分类
交通工程引用本文复制引用
胡锐鹏,张戎令,王朦诗,郭海贞,李华,娄许煜..大温差戈壁地区高速铁路无砟轨道混凝土开裂研究[J].硅酸盐通报,2018,37(6):2042-2047,2052,7.基金项目
青年人才托举工程(2015QNRC001) （2015QNRC001）
飞天学者特聘计划 （）
陇原青年创新人才扶持计划 （）
长江学者和创新团队发展计划滚动支持(IRT_15R29) （IRT_15R29）
甘肃省基础研究创新群体(145RJIA332) （145RJIA332）
兰州交通大学优秀平台资助(201606) （201606）
