半刚性基层沥青路面交通荷载断裂应力分析

半刚性基层沥青路面施工及使用期间,半刚性基层中存在各种裂缝,这裂缝是否会继续向沥青面层传递对路面结构的性能及使用寿命有很大影响,主要研究半刚性基层开裂后交通荷载对沥青路面结构的作用,分析沥青面层的应力集中情况。通过计算与分析说明,在单纯交通荷载作用下,增加沥青面层厚度有利于降低面层底部裂缝尖端的应力集中程度。

An Analysis of Dehiscence Stress of the Transportation Load on Semi-Rigid Base Bituminous Pavement

During the period in which semi-rigid base bituminous pavement is being constructed and used, the pavement structure is completely exposed to the natural environment, and undergoes the atmospheric influence as well as the transportation vehicles-combined action which continues to change. The semi-rigid base has every kind of cracks, whether those cracks will develop into the bituminous pavement, they will have very tremendous influence on the pavement structure performance and the service life. This article mainly studies the effects the semi-rigid base dehiscence has on the bituminous pavement structure function, and analyzes bituminous pavement stress concentration situation. Our calculations and research prove that, under the pure action of the transportation load, the surface layer cracks which are caused by the basic unit crack can be reduced when the surface layer is made thicker.