作　　者： ; ; ;

机构地区： 安徽工业大学建筑工程学院

出　　处： 《合肥工业大学学报（自然科学版）》 2009年第4期511-514,共4页

摘　　要： 半刚性基层沥青路面容易产生反射裂缝,实践证明在沥青路面中设置级配碎石夹层可以有效地减少反射裂缝的产生。文章基于ABAQUS有限元计算方法,通过断裂力学分析得出在沥青面层结构下设置级配碎石夹层结构,可以大大减小底基层的反射裂缝应力强度因子,防止反射裂缝的发生;同时适当增加下基层模量可以减缓基层反射裂缝的扩展,从而为沥青路面结构合理设置级配碎石夹层提供理论依据。 The semi-rigid base asphalt pavement is easy to produce reflection cracks, and it is proved that setting a sandwich layer of unbound graded aggregate under the asphalt pavement can prevent reflection cracking effectively. By using the ABAQUS finite element method and through fracture mehanics analysis, this paper draws a conclusion that setting a sandwich layer of unbound graded aggregate under the asphalt pavement can reduce the stress intensity factor of the subbase and prevent reflection cracking effectively. Simultaneously the suitable increasing of the the subbase modulus can slow down the expansion of reflection cracking. The results provide a theoretical basis for reasonable setting of the sandwich layer under the asphalt pavement.

关 键 词： 级配碎石 沥青路面 反射裂缝 断裂力学 有限元法

领　　域： [交通运输工程]