提出了基于可靠度的路基均匀性评价方法,建立了路基路面结构的二维有限元模型,采用蒙特卡罗法对典型沥青路面结构在不同路基回弹模量与不同变异系数条件下的结构可靠度进行分析计算,研究了路基回弹模量变异系数对路面结构可靠度的影响,确定了评价路基均匀性的可靠度划分依据。计算结果表明:高速、一级公路可靠度临界值为95%和90%时,路基回弹模量变异系数为0.05和0.10;二级公路可靠度临界值为90%和85%时,路基回弹模量变异系数为0.05和0.15;三、四级公路可靠度临界值为85%和80%时,路基回弹模量变异系数为0.15和0.25。以计算可靠度临界值作为相应公路路基均匀性评价标准,将各级公路路基均匀性等级分为优、中、差3个级别。 A method of evaluating subgrade homogeneity based on reliability is proposed and a two-dimensional finite element model of subgrade and pavement structure is established. The structure of a typical asphalt pavement structure with different modulus of elasticity and different coefficient of variation is obtained by Monte Carlo method Degree, the influence of the coefficient of variation of the subgrade resilience modulus on the reliability of the pavement structure is studied, and the basis of the reliability of the evaluation of the subgrade uniformity is determined. The calculation results show that the coefficient of variation of the rebound modulus of subgrade is 0.05 and 0.10 when the critical value of high-speed and first-class highway reliability is 95% and 90% respectively. When the critical value of secondary road reliability is 90% and 85% The coefficient of variation of elastic modulus is 0.05 and 0.15. The variation coefficient of the elastic modulus of subgrade is 0.15 and 0.25 when the reliability of Grade III and IV highway is 85% and 80% respectively. To calculate the critical value of reliability as the evaluation criteria for the corresponding roadbed homogeneity, the level of roadbed uniformity at all levels is divided into three levels of excellent, medium and poor.