基于模糊综合评判模型的污水管道缺陷定量化评价方法

Quantitative evaluation method for sewer defects based on fuzzy comprehensive evaluation model

利用模糊综合评判模型,从污水管道的密封性、稳定性和功能性三方面分别考虑不同缺陷类型的影响,利用层次分析法确定权重,建立定量化的污水管道缺陷状况评价方法模型.对南方某市一段污水管道进行评判,得到污水管道缺陷综合评价指数H=1.09,其中密封性指数Ht=0.44,稳定性指数Hs=0.78,功能性指数Hf=1.79,判定结果为紧急缺陷管道;通过对德国某市的管段进行评价,得到管道缺陷综合评价指数H=0.24,其中Ht=0.34,Hs=0.16,Hf=0.18,判定结果为轻微缺陷管道,与德国评价方法的结果类似,证明本模型适用于对情况复杂的污水管道进行评价.

Based on fuzzy comprehensive evaluation model and analytical hierarchy process,a quantitative method to evaluate sewer defects is proposed by considering different defect types and their effects on the tightness,stability and functionality of sewers.Two case studies were conducted.Sewer Defect Index（H） of 1.09,with Ht of 0.44,Hs of 0.78 and Hf of 1.79,was obtained on a sewer in a city of Southern China,suggesting that the sewer was in the rank of emergent defect.In contrast,H of 0.24,with Ht of 0.34,Hs of 0.16 and Hf of 0.18,was obtained on an example case in ATV 149,suggesting that the sewer was in the rank of minor defect.Similar results were obtained by ATV evaluation method,which confirmed the reliability of our proposed method.