污水干管失效风险评估和解决策略——广州市沥滘和西朗污水系统案例  

Failure Risk Assessment and Solution Strategy of Main Sewage Pipes——Cases of Lijiao and Xilang Sewage Systems in Guangzhou

作　　者：袁嵘 霍广炼 柯臻玮 周午阳 朱世泰 王广华 YUAN Rong;HUO Guanglian;KE Zhenwei;ZHOU Wuyang;ZHU Shitai;WANG Guanghua(Guangzhou Urban Drainage Co.,Ltd.,Guangzhou 510006,China;Guangzhou Municipal Engineering Design&Research Institute Co.,Ltd.,Guangzhou 510060,China)

机构地区：[1]广州市城市排水有限公司,广东广州510006 [2]广州市市政工程设计研究总院有限公司,广东广州510060

出　　处：《净水技术》2023年第4期137-143,168,共8页Water Purification Technology

基　　金：广州市城市排水有限公司科技项目(穗排水合字CG〔2021〕16号);广东省水利科技创新项目(2020-34)。

摘　　要：城市污水干管是污水输送的大动脉,若出现事故,将造成严重的溢流污染危害,特别在人口密集、地下管线空间资源紧张的中心城区,会对民众的生命财务及社会的安全运行产生极大的影响。为此,需研究污水干管失效风险的评估方法及相应解决策略。文中以广州市沥滘和西朗污水系统的污水干管为研究对象,建立水力模型,并用实际运行数据对模型进行率定,模拟流量与实际流量相似度达到99.5%。利用模型模拟结果中的水力参数和污水干管的物理属性、环境因素共同作为干管失效风险评估的指标,采用层次分析法耦合专家问卷调查法计算总风险得分,从而评估出高风险管段,提出连通策略,并进一步对连通策略进行评价。结果表明,通过增设连通管,南洲路污水干管日累计流量下降33.98%,超负荷状态从2.00降低为0.78。表明互连互通策略降低干管失效风险,从而保障污水干管的安全运行。The main sewage pipe is the main artery of sewage transportation.If the accident occurs,it will cause serious overflow pollution harm,especially in densely populated downtown with narrow underground space.Therefore,it is necessary to study the failure risk assessment method and solution strategy of main sewage pipe.A hydraulic model was established for the main sewage pipeline of Lijiao and Xilang sewage systems in Guangzhou,and the model was calibrated with actual operation data.The similarity between simulated flow and actual flow was 99.5%.Then using the hydraulic parameters of model and physical properties of trunk sewer,environmental factors as main failure risk assessment indices.Analytic hierarchy process coupled with expert questionnaire method was used to calculate the total risk score,then obtaining the high-risk section which was needed to be connected,further the connected strategy was evaluated.The results showed that the accumulated daily flow of the main sewage pipe under Nanzhou Road decreased by 33.98%,and the overload state decreased from 2.00 to 0.78.The failure risk of the main sewage pipe can be effectively reduced by adding the connecting pipe,so as to ensure the safe operation of the main sewage pipe.

关 键 词：污水干管 互连互通 水力模型 层次分析法 风险评估 

分 类 号：TU992[建筑科学—市政工程]