粉沙质泥沙沉沙池设计方案的试验研究

Study on design scheme of sediment tank for silt deposition

摘要: 本文简述了灌溉沉沙池以沉沙达到排清的设计思路及方法，针对沉淀粒径较细的粉沙质泥沙沉沙池设计长度较长的问题，结合具体工程模型试验实例，提出一种新的设计思路，即从沉沙池排出清水这一最基本要求出发，在有害泥沙还没有沉到池底时，从沉沙池含沙水流表层提取清水，以缩短沉沙地设计长度。最终，通过合理的工程方案和运行措施，达到提高沉沙效率、延长使用周期的目的。其基本原则可供此类沉沙池设计借鉴。

Abstract: In the design of sediment tank for irrigation, a normal method is often used to determine the tank length. According to this method, the design length of the sediment tank used to deposit silt is very long. In this paper, a new method is presented to decrease the design length of the tank. After several schemes were compared by the aid of physical model experiment, an optimum measure to increase the deposit efficiency and operation period of the sediment tank is recommended.