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以多层弹性层状体系理论双圆均布荷载为基础,结合国外长寿命路面设计方法及要求,对重载情况下半刚性基层沥青混凝土路面的沥青混凝土层拉应变分布规律进行研究。结果表明,对于半刚性基层的长寿命路面而言,有必要将中面层底部的拉应变作为控制指标之一。在半刚性基层的长寿命路面设计中,控制指标不仅要考虑沥青混凝土层层底拉应变,也要考虑沥青混凝土表面层的拉应变。
Based on the theoretical double circular uniform load of multilayered elastic layered system and the design method and requirements of long-life pavement abroad, the tensile strain distribution of asphalt concrete layer in semi-rigid base asphalt concrete pavement under heavy load is studied. The results show that for long-life pavements with semi-rigid basement, it is necessary to use the tensile strain at the bottom of the middle layer as one of the control indexes. In semi-rigid base long-life pavement design, the control index should not only consider the tensile strain of the asphalt concrete bottom layer, but also consider the tensile strain of the asphalt concrete surface layer.