摘要
通过哈大客专路基冻胀变形的观测,从全线路基冻胀量的大小和分布、不同结构类型路基冻胀量的差异和发生概率,以及冻胀量沿深度的变化和组成等方面,进行了阐述;通过冻胀原因和控制性因素分析,指出哈大客专路基冻胀变形部位主要集中在基床范围,得出现有路基结构形式下,冻结深度不是控制路基冻胀量的主因和控制基床冻胀变形,特别是基床表层冻胀变形是解决路基冻胀问题的关键等结论;并对寒区高速铁路路基结构形式进行了探讨,为寒区高速铁路路基冻胀病害的防治提供参考。
This paper, through observation of frost heaving deformation at the subgrade of Haerbin-Dalian Passenger Dedicated Line, described the amount and distribution between frost heaving amounts at different types of subgrade, the of frost heaving along the line, the difference probability of occurrence, and the change of frost heaving amount with depth and composition. After analysis of the causes and controlling factors of the frost heaving, it is pointed out that the deformation was taken place mainly in the range of the bed surrounding, and the conclusion is that with current subgrade structures, freezing depth is not the main factor controlling subgrade frost heaving and the control of bed frost heaving, especially that at surface layer of bed, is the key solving the this trouble. In addition, the structural forms of subgrade of high-speed railways in cold area were discussed, which may be referred for the purpose of control of frost heaving disease there.
出处
《路基工程》
2013年第3期54-58,63,共6页
Subgrade Engineering
关键词
客运专线
寒冷地区
季节性冻土
路基冻胀
变形观测
基床结构
passenger dedicated line （PDL）
cold area
seasonal frozen soil
subgrade frost heaving
deformation observation
bedding structure
