荷载作用下半刚性基层沥青路面工作性能研究

Study on the Performance of Semi-Rigid Base Asphalt Pavement under Load Effect

以半刚性基层沥青路面作为试验对象,在2017年9月至2018年6月,利用应变、温度传感器与无线数据采集系统对道路基层应变进行监测,研究路面结构内部残余应变分布规律。对实测数据进行分析可知:基层纵向应变比横向应变大,动荷载作用下主要以纵向应变作为控制指标;道路长期运营状态下,传感器的不断破坏反映半刚性基层受到一定程度损伤,车辆动荷载作用下基层纵向压应变随道路运营时间增长而逐渐减小,在一定程度上反映基层内疲劳损伤逐渐积累的过程,其储存应变能的能力逐渐丧失。

From Sep.,2017 to Jun.,2018,taking the semi-rigid base asphalt pavement as the test object,strain,temperature sensors&wireless data acquisition system have been used to monitor the strain of the road base,and the distribution law of residual strain in the pavement structure.According to the analysis of the measured data,the longitudinal strain of the base course is larger than the transverse strain,and the longitudinal strain is mainly used as the control index under the action of dynamic load;under the long-term operation of the road,the continuous destruction of the sensor reflects that the semi-rigid base course is damaged to a certain extent,and the longitudinal compressive strain of the base course under the action of vehicle dynamic load gradually decreases with the increase of the operation time of the road,to a certain extent,it is reversed during the process of fatigue damage accumulation,the ability of storing strain energy is gradually lost.