摘要
提出了一种适用于重载铁路的泡沫轻质土路基结构,对泡沫轻质土物理力学性质进行了试验研究。建立35～40 t轴作用下重泡沫轻质土路基结构有限元模型,计算分析了路基动荷载的幅值、分布、传递规律、作用深度。在室内开展了泡沫轻质土路基结构实尺模型试验,结果表明,在大荷载疲劳条件下,动变形小于0. 36 mm,累积变形小于0. 80 mm。泡沫轻质土路基结构性能较好,具有较为稳定的抵抗变形的能力。
This paper proposed a foamed lightweight soil subgrade structure suitable for heavy haul railway.Physical and mechanical properties of foamed lightweight soil were studied,finite element model was established for foamed lightweight soil subgrade structure with axle load of 35~40 t,which was used to calculate the amplitude,distribution,transmission law and action depth of the subgrade dynamic load,and the full-scale model test of foamed lightweight soil subgrade was carried out indoors.The results show that the dynamic deformation is less than 0.36 mm and the cumulative deformation is less than 0.8 mm under the condition of heavy load fatigue,the foamed lightweight soil subgrade structure has better performance and has a relatively stable ability to resist deformation.
作者
张栋
韩自力
蔡德钩
陈锋
李泰灃
ZHANG Dong;HAN Zili;CAI Degou;CHEN Feng;LI Taifeng(China Academy of Railway Sciences,Beijing 100081,China;Railway Engineering Research Institute,China Academy of Railway Sciences Group Co. Ltd. ,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2019年第2期37-40,共4页
Railway Engineering
基金
中国铁路总公司科技研究开发计划(J2017Z505
2015G004-C)
中国铁道科学研究院基金(2016YJ039
2017YJ044)
关键词
重载铁路
路基结构
试验研究
泡沫轻质土
实尺模型试验
Heavy haul railway
Subgrade structure
Experimental research
Foamed lightweight soil
Full-scale model test
