无机结合料稳定类基层疲劳损坏预估模型研究

【作者】 李小刚；

【导师】 沙爱民；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2006， 硕士

【摘要】 本文在总结国内外无机结合料稳定类基层材料疲劳试验研究的基础上，对三种常见的无机结合料稳定类基层材料进行疲劳性能研究。在对三种结构的水泥稳定碎石(悬浮密实结构、骨架密实结构、骨架空隙结构)、两种结构的二灰稳定碎石(悬浮密实结构、骨架密实结构)、均匀密实结构的水泥稳定细料土进行室内三分点加载疲劳试验的基础上，采用威布尔分布理论对疲劳数据进行处理，得到各自的室内疲劳预估模型，并结合实际路面的情况对室内疲劳预估模型进行修正。对不同结构不同材料的疲劳预估模型进行对比分析，得出二灰稳定碎石的疲劳性能优于水泥稳定碎石和水泥稳定土；悬浮密实结构的疲劳性能优于骨架密实结构的；骨架空隙结构水泥稳定碎石的疲劳性能相对较好的原因是因为在成型梁的时候在梁的底部形成了一层水泥浆体。更多还原

【Abstract】 This paper develops a research on the fatigue property of three normal kinds of semi-rigid base materials, on the base of the comprehensive analysis of the most up to date development of the fatigue test. It presents test results of performance for three structural types of cement stabilized macadam including suspend-dense structure framework-dense structure and framework-pore structure, for two structural types of lime fly-ash macadam including suspend-dense structure and framework-dense structure, and for cement stabilized soil. By the probability analysis of Weibull on the results of fatigue test, the paper has a serial of fatigue prefigurative models. What’s more, amends these models linking to the factual pavement performance. Comparing and analyzing these fatigue models, this paper discovery the conclusion that the fatigue property of fly-ash macadam is better than that of cement stabilized macadam and cement stabilized soil. The fatigue property of framework-dense structure is better than that of suspend-dense structure. The fatigue property of framework-pore structural cement stabilized macadam is comparatively better because the bottom of the girder has formed a layer of grout in the course of forming the girder.更多还原