基于弯沉指标的沥青路面冷再生基层模量研究

The Research of Modulus at the Cold Recycling Grass-roots Layer of Asphalt Pavement Structure Based on Deflection Index

大中修后,半刚性基层沥青路面结构层总厚度往往有不同程度的增加,相应会带来各种不利影响。在冷再生基层厚度一定的情况下,可通过调整基层模量使路面结构弯沉符合验算要求。拟定路面结构参数,在有限元计算基础上,提出基于弯沉指标的冷再生基层模量范围,为半刚性基层沥青路面结构性能恢复设计提供参考。

The thickness of semi-rigid base asphalt pavement often increases after large or medium maintenance,which will bring various adverse effects.The deflection of the pavement structure can meet the checking requirements by adjusting the modulus of cold recycling grass-roots layer under the condition of a certain thickness of the base.The modulus range of cold recycling grass-roots layer based on deflection is proposed by finite element calculation,which can provide reference for the structural performance restoration design in semi-rigid base of asphalt pavement.