【作者】 王书延；

【导师】 魏建明；

【作者基本信息】 重庆交通大学 ， 道路与铁道工程， 2008， 硕士

【摘要】 近年来,随着我国公路交通的快速发展,交通运输量不断增长,超载和重载车辆在整个交通流中所占的比例增加,以及渠化交通现象的产生,高等级公路早期破坏现象的日益严重,而根据国内外研究表明,大粒径沥青混合料能提高路面的抗车辙能力,同时又不削弱其他方面的性能。本文参照国外对大粒径沥青混合料的研究成果,对沥青稳定碎石基层材料的力学特性和路用性能进行研究,并对混合式基层沥青路面的路面结构进行了力学计算分析。首先,分析了我国现阶段高等级公路存在的问题及原因,提出了具有沥青稳定碎石这样一种柔性基层沥青路面,并阐述了目前国内外在这一领域的研究成果。其次,分析了沥青混合料和沥青稳定碎石组成结构特性以及强度构成机理,通过采用多级嵌挤级配设计方法,提出了具有骨架嵌挤结构的级配,并对混合料配合比设计方法进行了研究。再次,通过大量的室内试验对沥青稳定碎石混合料的力学特性、高温抗永久变形性能、水稳定性能进行了试验研究。最后,在前面试验研究的基础上,通过采用三维有限元的方法分析了具有柔性基层沥青路面的结构受力特性,通过与半刚性基层沥青路面结构受力的对比分析,对混合式基层沥青路面结构设计方法进行了探讨,对以后进行这类路面的结构设计有一定的借鉴意义。通过研究,得出沥青稳定碎石拥有优良的路用性能,并且混合式基层沥青路面结构受力优于半刚性基层沥青路面。更多还原

【Abstract】 In recent years, with the rapid development of our country highway traffic, the traffic volume is increasing constantly, the overload and fully-loaded vehicles are taking an increasing proportion in the whole traffic, the channel-oriented traffic is arising, and the early disruptive phenomenon is becoming more and more serious. But according to the research of both domestic and abroad, coarse bituminous mixture can raise the rut-resist ability of the pavement but not weaken other properties. Referring to the fruit of foreigners’study of the coarse bituminous mixture, this essay will not only study the mechanic features and road property of the material of the bituminous stabilized crushed stones base-course, but also will do the dynamic analysis of the pavement structure with bituminous stabilized crushed stones base-course.Firstly, analyzed the problem and causes of our country’s highway that exists at present time, raised bituminous pavement with such a flexible base-course of bituminous stabilized crushed stones and describe the fruit of foreigners’study in this area.Secondly, analyzed the structural constitute properties and intense form mechanics of bituminous mixtures and bituminous stabilized crushed stones, through applying the design method of inlaying multi-grades, has proposed the gradation with skeleton inlay structure, and has studied the design method of mixture match ratio.Thirdly, through a great number of indoor tests, has done research on the properties of bituminous stabilized crushed stones mixtures such as the mechanic characteristic, the high temperature deform-resisted, and water stability and so on.Finally, on the basis of experimental study above mentioned, have analyzed the structural strength properties of the flexible base-course bituminous pavement by using the three-dimensional finite element. Compared the structural strength with semi-rigid bituminous pavement, go on the discussion to the structural design method of bituminous pavement of composite, which has its significance in such kind of pavement structural design in future.According to the research, we can get the result that bituminous stabilized crushed stones have excellent performance, and the structural strength of composite bituminous pavement is better than semi-rigid bituminous pavement.更多还原