【摘要】 通过国外最新研究成果及物理模型试验相结合的方法 ,对上海市城市排水系统某大型倒虹管的泥沙淤积现象及防淤措施进行了分析。结果表明 ,倒虹管排放流量小于 30万m3 /d时 ,淤积泥沙厚度将影响其水力性能 ,应进行大流量冲洗 ;排放量大于 35万m3/d时 ,基本能满足其正常运行 ;提出了以流速为控制指标的运行管理措施 ,保证倒虹管的安全运行。更多还原

【Abstract】 In this paper,the authors analyze the sedimentation problem and measures to prevent sever sedimentation in a larger inverted siphon or a sewage system of Shanghai by using the up-to-date research results and physical modeling.It is shown that the height of sediment bed will influence the hydraulic characteristic of the inverted siphon when the discharge flow is smaller than 300000 m 3per day,so regularly flushing by larger flow is needed;and the inverted siphon will run under normal condition when the discharge flow is larger than 350000 m 3per day.The operating measure using the velocity as controlling parameter is put forward for safe running.更多还原