摘要
旧水泥混凝土路面与新沥青混凝土路面交接部位在车辆荷载长期作用下,基层交接部位正对应的道路面层会出现反射裂缝。其中交接裂缝尖端两侧切向不协调变形是产生反射裂缝的主要原因,法向不协调变形会加速反射裂缝的发展。为进一步研究荷载作用位置、车辆行驶情况、倒角参数等因素对反射裂缝的影响,通过有限元数值模拟方法,得出交接裂缝水泥侧尖端的应力集中现象导致其发生不协调变形的结论,并结合现用工艺发现对交接裂缝水泥侧尖端进行倒角工艺,可以有效应对出现反射裂缝的问题。
Under the long-term action of vehicle load, reflection cracks will appear in the surface layer directly corresponding to the junction of the old cement concrete pavement and the new asphalt concrete pavement. Among them, the tangential uncoordinated deformation on both sides of the tip of the intersecting crack is an important cause of reflection cracks, and the normal uncoordinated deformation is to accelerate the development of reflection cracks. In order to further study the influence of load position, vehicle driving state, chamfering parameters and other factors to the reflection crack, the finite element numerical simulation method is used to conclude that the stress concentration phenomenon at the cement tip of the junction crack causes the uncoordinated deformation. Combined with the application of the existing process, it is found that the chamfering process of the cement tip of the joint crack can effectively cope with the occurrence of reflective cracks.
出处
《江苏建材》
2019年第3期31-34,共4页
Jiangsu Building Materials
基金
江苏省大学生创新创业训练计划项目(201811276106H)
南京工程学院大学生科技创新基金“挑战杯”培育项目(TP20190007)
南京工程学院大学生科技创新基金项目(TB20190940)
