融合水动力模拟的城市污水管道健康度评价方法

Evaluation Method for Urban Sewer Pipeline Health Incorporating Hydraulic Simulation

为解决城市污水管道日常修复养护优先级确定问题,提出融合水动力模拟的城市污水管道健康度评价方法,通过构建水动力模型模拟得到污水管道关键水力状态指标,综合考虑污水管道缺陷因素、工况因素及社会环境因素三方面,建立基于层次分析法(analytic hierarchy process,AHP)和决策实验室法(decision-making trial and evaluation laboratory,DEMATEL)组合定权的城市污水管道健康度综合评价模型。结果表明,DEMATEL方法能够考虑指标间相互影响关系,有助于优化传统AHP权重分布结果;负荷状态、流速是城市污水管道健康度评价的重要指标,占比70.61%。最后,运用此模型对广州市沥滘污水干管健康度进行评估,其结果能够有效识别病态管道,为排水管理部门确定管道维护优先级提供科学合理的决策依据。

To address the issue of prioritizing routine maintenance and repair of urban sewer pipelines,this paper proposes an evaluation method for the health assessment of urban sewer pipelines that incorporates hydraulic simulation.By constructing a hydraulic model,key hydraulic indicators were obtained through simulation.A comprehensive health assessment model was established by integrating analytic hierarchy process(AHP)and decision-making trial and evaluation laboratory(DEMATEL)for weight determination,and considering defect factors,operating conditions,and social environmental factors.Results show that the DEMATEL method can consider the mutual influence among indicators,contributing to the optimization of traditional AHP weight distribution outcomes.Load condition and flow velocity are important indicators in evaluating the health of urban sewer pipelines,accounting for 70.61%.Finally,this established model was applied to assess the health of the Lijiao sewer trunk in Guangzhou.The results effectively identify problematic pipelines,providing a scientific and rational decision-making basis for the drainage management department to determine pipeline maintenance priorities.