论文部分内容阅读
针对半刚性基层在沥青路面使用过程引起的裂缝破坏,使其在高等级公路中的适用性受到质疑的问题,通过设置级配碎石和沥青碎石过渡层使半刚性基层的层位实现向下放置,实现了改善半刚性基层受力和减少裂缝的目的。采用ANSYS计算设置不同厚度的级配碎石和沥青碎石过渡层,分析路面结构在荷载作用下基层厚度变化时轮隙中心的受力情况,以考察适宜的半刚性基层层位和厚度。力学分析结果表明:采用厚度为12～15cm的级配碎石层和厚度为25～35cm的半刚性基层、或设置厚度为10～15cm的沥青碎石层和厚度为20～30cm的半刚性基层这两种结构,完全可以满足控制路面结构开裂的指标要求;能减少路面结构出现裂缝,延长沥青路面的结构寿命。
In view of the problem that the semi-rigid base cracks in the asphalt pavement caused by the use of the process, making it difficult to be questioned in the application of high-grade highways, by setting the graded gravel and asphalt gravel transition layer so that the formation of semi-rigid base layer Under the placement, to achieve the purpose of improving the semi-rigid base force and reduce cracks. ANSYS was used to calculate the different thickness of graded graded macadam and asphalt aggregate transitional layer. The stress of the pavement center under load was analyzed in order to investigate the appropriate semi-rigid basement layer and thickness. Mechanical analysis results show that the gravel layer with thickness of 12 ~ 15cm and the semi-rigid base with thickness of 25 ~ 35cm or the asphalt pavement with thickness of 10 ~ 15cm and the semi-rigid base with thickness of 20 ~ 30cm These two kinds of structures can completely meet the requirements for controlling the cracking of the pavement structure, reduce the cracks in the pavement structure and prolong the structural life of the asphalt pavement.