层间接触状态对半刚性基层沥青路面使用寿命的影响分析

基于弹性层状体系,利用Kenlayer程序研究了标准轴载作用下半刚性沥青路面层间接触状态对路面结构使用寿命的影响。分析结果表明:层间接触状态对路面结构层中应力的分布和路面使用寿命均有重要影响。完全连续状态下的路表弯沉值、结构层层底拉应力和路基顶部压应力要小于非完全连续状态的情况,基面层间的接触状态所产生的影响要大于面层间的接触状态。层间接触状况较差时,路面结构的使用寿命会有明显下降。层间完全连续状态下的路面使用寿命,几乎是其它层间接触状态下的2~4倍。因此,铺设路面时适当铺洒粘层和透层,可保证层间连续性,

Analysis of Influence of Interface Contact Condition on Service Life of Semi-rigid Base Asphalt Pavement

Based on the elastic layered system, the Kenlayer program is adopted to research the influence of interface contact condition on the service life of semi-rigid base asphalt pavement under standard axle load. The analysis results show that the interface contact condition has very important influence on the stress distribution of pavement structure and pavement service life. The surfacing deflection, bottom tensile stress of structure layer and compressive stress of subgrade top for complete continuous condition were all smaller than that in incomplete continuous condition. The interface condition between base and surface layer has more obvious effect on pavement structure than that between surface layers. When the interface contact condition is poor, the service life of pavement structure would be markedly reduced. The pavement service life of complete continuous condition is almost 2~4 times as much as that of other interface conditions. Therefore, appropriate bonding layer and prime coat for pavement can guarantee the continuity between layers and prolong the service life of pavement.