重力流长距离输水系统调压井优选及评价  

Optimization and Evaluation of Surge Shaft for Gravity-driven Long Distance Supply System

作　　者：石韬 王婷婷[2] 高金良[2] 

机构地区：[1]内蒙古自治区水利水电勘测设计院,内蒙古呼和浩特010020 [2]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《中国给水排水》2017年第9期49-52,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51278148);国家水体污染控制与治理科技重大专项(2014ZX07405002)

摘　　要：重力流输水工程利用天然的地形差输水,正常运行时,测压管水压高于静水压,在管路的闸阀关闭后,落差越大,净水压差值越高,对管段的水击压力也越大,大高差输水工程中被迫提高了管道的耐压等级,使工程造价升高。因此,在管道中间恰当位置设置调压井是降压的有效措施。结合内蒙古YCJL工程实例,在保证水系统安全运行的前提下,利用管网造价数学模型并用枚举法结合遗传算法求解,确定了调压井个数,使整个输水系统的投资建设费用最低。The gravity-driven water flow system takes advantage of the natural terrain to deliver water. Under normal operating conditions, the piezometric pressure is higher than the hydrostatic pres- sure. If a pipeline gate valve was closed, the pressure in the pipeline would equal the difference in water transportation elevations ; therefore, larger difference in elevations could result in greater water hammer in the pipe, and subsequently lead to increases in pipe pressure ratings and project costs. Surge shaft, if properly positioned along the pipeline, is an effective measure to relief water hammer. Based on the YCJL project in Inner Mongolia, on the premise of safe operation of the water supply system, a mathematical model of costs of the water supply system was used, in combination with the enumeration method and the genetic algorithm, to determine the number of surge shafts required to minimize the cost throughout the water supply system.

关 键 词：长距离输水 重力流 调压井 数学模型 水力过渡过程分析 

分 类 号：TU991.39[建筑科学—市政工程]