过去,城市立交桥桥面大部份用水泥砼铺装,虽然其耐磨性和温度稳定性很好,但路面开裂严重,主要是板的边角裂及纵横裂,而且施工时间长,不适应当前快速施工的要求。因此,人们就偿试着用柔性铺装——沥青砼代替刚性铺装——水泥砼。因为柔性铺装自重轻,施工时间短,养护操 In the past, most of the overpasses of urban overpasses were paved with cement concrete. Although their wear resistance and temperature stability were very good, the pavements were seriously cracked, mainly due to cracks in the corners of the panels and vertical and horizontal cracks. The construction time was too long to adapt. The current rapid construction requirements. Therefore, people have tried to replace the rigid paving-cement hoe with a flexible paving, asphalt concrete. Because of the light weight of flexible pavement and the short construction time, maintenance exercises