机场复合道面剩余寿命预估方法

分别运用美国联邦航空局(FAA)基于弹性层状体系理论的道面设计方法(LEDFAA)、中国民用机场水泥混凝土道面设计方法(APDMC)与PCI衰变模型,建立了复合道面剩余寿命的预估方法,比较了3种方法的预估结果及其适用性。计算结果表明:3种预估方法确定的剩余寿命较为接近,最大偏差为3.2 a,最小偏差仅为0.1 a,引起偏差的原因在于不同预估模型采用的控制指标不同。基于LEDFAA设计方法的预估结果对土基模量很敏感,基于APDMC设计方法的预估结果对混凝土的弯拉强度非常敏感,而PCI能够全面地反映道面的使用性能,因此,在有足够历史数据的条件下,采用PCI衰变模型预估道面的剩余寿命。

Prediction methods of remaining life for composite pavement of airport

Based on elastic layer system theory design method of Federal Aviation Administration(LEDFAA),airport pavement design method of China(APDMC) and pavement condition index(PCI) regression model,three prediction methods of remaining life for composite pavement of airport were established,the prediction results and applicabilities of three methods were compared.Analysis result indicates that the remaining lives calculated by three methods are approximate,the maximum deviation is 3.2 a,the minimum deviation is 0.1 a,and the deviation is mainly induced by different control indices of three models.Remaining life is most sensitive to subgrade modulus and concrete flexural-tensile strength for the methods based on LEDFAA and APDMC respectively,PCI regression model is recommended on the condition of having sufficient historical data of pavement performance.4 tabs,6 figs,10 refs.