淤积条件下污水排放口工程上升管喷口高度的确定

摘要

结合上海市污水治理二期工程实例，利用泥沙运动相似理论，通过水力模型试验，从环境泥沙淤埋在上升管喷口上rn的最不利条件出发，分析喷口射流对泥沙的冲淤规律，提出喷口射流冲淤临界流速的概念；对试验数据进行相关分析，得出rn喷口射流冲淤的经验关系式，提出浅水域淤积条件下污水排放口工程上升管喷口高度确定方法.%The behavior of port jet scouring under the most unfavorable sedimentation condition isrnexperimentally investigated in hydraulic model test. The conception of critical sedimentrnscouring velocity is defined and an empirical expression of the relationship amongrnsedimentation depth, critical scouring velocity and jet diameter is obtained. On this basis,rnthe method for determination of the height of riser port is proposed.