南水北调水厂供水后焦作市配水系统的调整规划

Adjustment planning of Jiaozuo water distribution system after water supply from the waterworks of the South-to-North Water Transfer Project

焦作市规划在2座南水北调水厂建成运行后,北部山前坡地上的现状5座地下水厂全部转变为加压站和备用水源,切换为由地处南部平原区的南水北调水厂进行供水。水源切换后,北部城区的供水流向发生反转,现有配水干管系统将不能满足使用要求。规划结合城区地形、水厂位置、配水管网现状、各片区的用水需求等对焦作市的配水系统进行了系统性的调整优化,将城区和周边村镇划分为8个压力分区,规划了7座加压站、8条输水干管以及各分区内的配水干管布置方案,构建了逐级加压、分区供水的新的城市配水系统。规划通过平差计算确定了各管段的管径,进一步优化了压力分区方案,还通过数值模拟方法对各分区系统的水锤作用进行了分析计算,制定了相应的水锤防护措施。

After the construction and operation of the two waterworks in the South-to-North Water Transfer Project,Jiaozuo plans to supply water by the two waterworks on the southern plains.The five underground waterworks in the northern hillside of Jiaozuo will be all converted into pressure stations and backup water sources.Due to the changes of water sources,the flow direction of water supply in the northern urban area will be reversed,and the existing main pipe system of water distribution cannot meet demand.Therefore,the plan systematically adjusted and optimized the water distribution system of Jiaozuo based on the terrain,the location of water plants,the current status of the water distribution network,and the water demand of each area.The urban area,surrounding villages and towns were divided into 8 pressure partitions in the plan.Moreover,the plan designed 7 pressurization station stations and 8 water main pipes,and arranged water distribution pipes in each zone.A new urban water distribution system with step-by-st ep pressure and zone water supply was built in this plan.In addition,the plan determined the pipe diameter of each section through the adjustment calculation,which further optimized the scheme of pressure partition.Furthermore,the water hammer effect of each zone system was analyzed and calculated by the numerical simulation method,and the corresponding protection measures were formulated.