合肥市聚焦预防燃气爆炸、桥梁垮塌等重大安全事故，率先建成“城市生命线安全运行监测系统”，利用100多种监测传感器，依托大数据、云计算、区块链、人工智能等技术，对高风险和人口密集区域的给排水、燃气、热力、桥梁等城市生命线进行实时监测，建立“前端感知—风险定位—专业评估—预警联动”城市生命线工程安全运行与管控精细化治理创新模式，实现风险快速精准定位、及时预警处理防范。
目前，合肥全市共布设了8万多套前端感知设备，涵盖51座桥梁、2000多公里给排水、燃气、热力等地下管线、58公里综合管廊，建立了预警信息三级联动处置机制，成立了大数据中心和24小时监测中心，每天实时采集分析500多亿条运行数据，及时将预警信息分级分层加推到城市生命线运管企业、行业主管部门和市应急指挥中心，联动处置预警信息。系统运行以来，实现月均有效报警92.8起，成功预警燃气管网泄漏、沼气浓度超标、供水管网泄漏、水厂泵站运行异常、路面塌陷、重型车辆超载等突发险情6000多起。较系统应用前，全市地下管网事故发生率下降60%、风险排查效率提高70%。
预警案例
2019年9月24日9点20分，燃气监测系统发现裕溪路与幸福路交叉口附近位于郎溪路高架桥下燃气井RQ9148出现甲烷浓度超限报警，经分析研判初步判断为燃气泄漏并及时推送至燃气集团。经燃气集团现场复核确认为第三方施工原因导致燃气管道泄漏，发现可燃气体已填充约23.5米，浓度爆表，现场充满了刺激性气味。燃气管道泄漏的位置处于老城区内，周围人口密度较大，其上方是郎溪路高架桥，车流量较大，且周边300米范围内有5处党政机关、9所学校、3所医院、1处中石化加油站、1座大型高架桥、1个大型商业广场等，一旦发生爆炸，会造成巨大的人员伤亡、财产损失和桥梁损伤。燃气集团立即关闭泄漏点两端截断阀进行抢修作业，至9月25日凌晨燃气管道抢修完成，避免了恶性事件的发生。
合肥市“城市生命线工程安全运行监测中心”
Focusing on the prevention of major safety accidents such as gas explosion and bridge collapse, Hefei took the lead in building an "urban lifeline safety operation monitoring system", using more than 100 monitoring sensors and relying on technologies such as big data, cloud computing, blockchain and artificial intelligence to conduct real-time monitoring of urban lifelines such as water supply and drainage, gas, heat and bridges in high-risk and densely populated areas, Establish an innovative model of "front-end perception - risk positioning - professional evaluation - early warning linkage" for fine governance of safe operation and control of urban lifeline project, so as to realize rapid and accurate risk positioning, timely early warning treatment and prevention.
At present, more than 80000 sets of front-end sensing equipment have been deployed in Hefei, covering 51 bridges, more than 2000 kilometers of underground pipelines such as water supply and drainage, gas and heat, and 58 kilometers of comprehensive pipe gallery. A three-level linkage disposal mechanism for early warning information has been established, and a big data center and 24-hour monitoring center have been established to collect and analyze more than 50 billion pieces of operation data in real time every day, Timely push the early warning information to the urban lifeline transportation management enterprises, industry competent departments and the municipal emergency command center, and handle the early warning information in linkage. Since the operation of the system, 92.8 monthly effective alarms have been realized, and more than 6000 sudden dangerous situations such as gas pipe network leakage, excessive biogas concentration, water supply pipe network leakage, abnormal operation of water plant pump station, road collapse and heavy vehicle overload have been successfully warned. Compared with before the application of the system, the accident rate of underground pipe network in the city decreased by 60% and the risk investigation efficiency increased by 70%.
Early warning case
At 9:20 on September 24, 2019, the gas monitoring system found that the gas well rq9148 located under the viaduct of Langxi Road near the intersection of Yuxi Road and Xingfu road had an alarm of methane concentration exceeding the limit. After analysis and judgment, it was preliminarily judged as gas leakage and sent to the gas group in time. After on-site review by the gas group, it was confirmed that the gas pipeline leakage was caused by the third-party construction. It was found that the combustible gas had been filled for about 23.5m, the concentration burst the meter, and the site was full of pungent smell. The location of gas pipeline leakage is in the old urban area, with a large population density. Above it is Langxi Road Viaduct with large traffic flow. There are 5 party and government organs, 9 schools, 3 hospitals, 1 Sinopec gas station, 1 large viaduct and 1 large commercial square within 300m around. Once an explosion occurs, it will cause huge casualties Property damage and bridge damage. The gas group immediately closed the block valves at both ends of the leakage point for emergency repair, and the emergency repair of the gas pipeline was completed in the early morning of September 25, avoiding the occurrence of malignant events.
Hefei "safety operation monitoring center of urban lifeline project"
