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为了弄清楚温度对半刚性基层道路反射裂缝的产生和发展的影响作用,提高道路的通行能力并延长其使用寿命,对该道路由温度作用引起的反射裂缝进行细致的研究,并提出合理的防治措施。应用ABAQUS建立基层带有裂缝的复合路面有限元模型,首先分析了路面结构中的应力随温度作用的变化情况;然后,通过对比分析研究了设置与未设置防裂功能层两种情况下路面结构内的应力变化情况。路面结构在增设了防裂功能层后的应力低于未设功能层时的数值,且下降幅度处于73.51%~86.97%之间,降低效果较为明显。提出的处理措施可以有效地防治半刚性基层道路因温度作用引起的反射裂缝问题。
In order to clarify the effect of temperature on the generation and development of reflective cracks in semi-rigid grass-roots roads, improve the capacity of roads and prolong their service life, the reflective cracks caused by the temperature action of the road are studied in detail and reasonable control measures Measures. ABAQUS is used to establish the finite element model of composite pavement with cracks in the ground floor. Firstly, the change of stress in pavement structure with temperature is analyzed. Then, the pavement structure with or without crack prevention function layer is analyzed through comparative analysis. Within the stress changes. The stress of the pavement structure after adding the anti-crack functional layer is lower than that of the non-functional layer, and the decreasing range is between 73.51% and 86.97%. The reduction effect is obvious. The proposed treatment measures can effectively prevent the reflective cracking caused by the temperature effect on the semi-rigid base road.