Service performance prediction model of asphalt pavement with two corrected parameters
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摘要: 为精确预测沥青路面使用性能, 根据沥青路面性能曲线标准衰变方程中形状因子与寿命因子的敏感度不同, 视形状因子为主要动态参数, 采用改进参数自适应跟踪法进行预测, 视寿命因子为交通轴载的函数, 并对其进行修正, 依据修正后的双参数建立了沥青路面使用性能双参数修正预测模型。计算结果表明: 沥青路面使用性能双参数修正预测值和实测值最接近, 误差最小, 因此, 该模型预测精度高。Abstract: In order to accurately evaluate the service performance of asphalt pavement, the standard disintegration equation of performance curve of asphalt pavement was studied, the function differences of its shape factor and life factor were analyzed, the shape factor was taken as main dynamic parameter and predicted by adopting modified parameter self-adaptation method, the life factor was taken as a function of traffic load and modified, and a service performance prediction model of asphalt pavement with two corrected parameters was set up.Computation result shows that the prediction value of the model accords with the measure value for the performance, its computation error is minimum, so the prediction precision of model is high.
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表 1 回归参数取值
Table 1. Regression parameter values
基层类型 i ai bi ci 半刚性 1 15.723 8 0.586 1 -0.206 4 2 119.660 0 -0.112 4 -0.105 3 3 1.524 7 -0.101 6 -0.098 6 
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表 2 轴载作用次数
Table 2. Axle-load acting numbers
年份 1992 1993 1994 1995 1996 1997 1998 1999 2000 年累计轴次 297 556 391 914 451 160 524 777 719 295 682 457 725 914 472 155 500 477 日平均轴次 816 1 073 1 236 1 437 1 970 1 869 1 988 1 294 1 371
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