文章针对探地雷达应用技术存在的问题,研究了路面结构层材料介电常数模型。基于试验,对现有介电常数的线性模型和均方根模型的合理性和适应性进行了验证,并建立了适用于沥青混合料和水泥混合料的新的介电常数模型。计算及试验结果表明,采用本文所建模型计算得到的介电常数值与介电特性测量值之间误差相比于现有模型显著减小,从而验证了所建模型的合理性。 In this paper, aiming at the existing problems of ground penetrating radar application technology, the model of dielectric constant of pavement structure layer materials is studied. Based on the experiments, the rationality and adaptability of the existing linear model and rms model of dielectric constant were verified, and a new model of dielectric constant suitable for asphalt mixture and cement mixture was established. The calculation and experimental results show that the error between the dielectric constant and the dielectric property measured by the model proposed in this paper is significantly reduced compared with the existing model, which verifies the rationality of the model.