摘要
城市供水管网运行安全监测存在信息不全、手段缺乏的问题。首先通过管损数据分析,研究了供水管网运行安全的影响因素,提出了保护性监测和预防性监测2类监测,建立了供水管网运行状态、管道结构和管网环境等“三类参数”的监测指标;其次针对埋地管网,研究了无线信号在地层中传输的路径损耗规律,研发了无线透传感知网络技术;最后,在上海市供水管网抢修现场部署了监测系统。结果表明:管网交叉路口、交叠管线和交变荷载“三交区域”为管损高发区域,为监测的关键位置;体积含水率是影响无线信号路径损耗的主要因素,在高含水量下,砂性土较黏性土路径损耗小;多跳自组网可有效提升无线网络整体的地层穿透能力;管道下方的回填土密实度对管道后期沉降影响大,应确保回填质量,结构监测系统可先于管网渗漏、压力流量变化进行安全预警。
There are problems of incomplete information and lack of means in monitoring the operation safety of urban water supply pipeline networks.First,pipe loss data was analyzed to understand the influencing factors of water supply network operation safety.Protective monitoring and preventive monitoring were proposed for different purposes.Monitoring indexes were established,including the operation status,pipe structure,and environment conditions.Then,the path loss of wireless signal transmission for buried pipelines in the soil was studied.Finally,a monitoring system was deployed at the emergency repair site of Shanghai Water Supply Network.The results indicate that there are lots of pipe loss at the location involving the intersection,overlapping pipelines,and alternating load.They are the key locations for monitoring.The volumetric water content of soil is the main factor affecting the path loss of wireless signals.The path loss of sandy soil is smaller than that of clay soil at a high water content.The multi-hop network can effectively improve the penetrability of wireless network.The compactness of the backfill below the pipeline has a great impact on the later settlement of the pipeline.Therefore the quality of the backfill should be ensured.Structural monitoring can precede leakage,pressure,and flow change of water supply network for safety warnings.
作者
王飞
胡智翔
胡群芳
海倩
车德路
施静康
吴俨
WANG Fei;HU Zhixiang;HU Qunfang;HAI Qian;CHE Delu;SHI Jingkang;WU Yan(Shanghai Institute of Disaster Prevention and Relief,Tongji University,Shanghai 200092,China;Key Laboratory of Urban Safety Risk Monitoring and Early Warning of the Ministry of Emergency Management,Shanghai 200092,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;Wuxi Wisen Innovation Co.,Ltd,Wuxi 214135,China)
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第2期197-205,212,共10页
Journal of Tongji University:Natural Science
基金
国家重点研发计划(2022YFC3801000)
国家重点研发计划(2016YFC0802400)
国家自然科学基金(51978530)
上海市“科技创新行动计划”社会发展科技攻关项目(22dz1201200)。
关键词
供水管网
结构健康监测
运行安全
无线传感网络
土层传输损耗
water supply networks
structural health monitoring
operation safety
wireless sensor network
path loss of wireless signal transmission in soil
作者简介
第一作者:王飞(1985-),男,副研究员,博士生导师,工学博士,主要研究方向为城市基础设施风险智慧感知与灾害防控。E-mail:wangf@tongji.edu.cn;通信作者:胡群芳(1978-),男,教授,博士生导师,工学博士,主要研究方向为城市市政管网运行安全与防灾、土木工程风险分析与评估。E-mail:huqunf@tongji.edu.cn。
