水泥道面调查单元划分及病害程度对PCI的影响

介绍了水泥混凝土道面损坏状况调查与评价方法,以390个水泥混凝土道面标准调查单元的现场数据为基础,通过变化单元划分方法及病害程度等级,统计分析了单元尺寸、形状特征以及病害程度人工识别误差对道面状况指数(PCI)精度的影响,结果表明:单元尺寸对PCI值影响较小,单元板块数在20±5范围内较合理,此时PCI计算结果误差约为...

Effect of Unit Dividing and Distress Severity on PCI Accuracy for Cement Concrete Pavement

Airport cement concrete pavement condition survey and evaluation procedure was introduced,and the effect of sample unit size,shape and distress severity on pavement condition index (PCI) accuracy was investigated by altering inspection unit size and shape and distress degree based on field data collected from 390 standard inspection units.The results show that sample unit size has little effect on PCI accuracy,and as long as the unit size is within 20±5 slabs,the error is about 1 point.Altering unit shape leads to significant difference of section PCI value,therefore units dividing cannot be altered arbitrarily.PCI value calculated by horizontal units is lower relatively,but it is more conservative for management.The effect of severity deviation of a single main distress due to manual data collection on section PCI is insignificant,and the error is limited to about 2 points,however,the average error reaches up to 10 points if severity degrees of all distress are deviated.