薄壁低强度塑料滤水管适宜开孔率的研究

论述了滤水管设计的基本要求和地下水由含水层进入滤水管时的水头损失。通过模型试验，确定了薄壁低强度塑料滤水管的抗拉强度、单位降深出水量及水头损失与开孔率的关系。分析单位降深出水量、水头损失随开孔率的变化特征，确定了薄壁低强度塑料滤水管满足出水量要求，水头损失较小而又不过份降低其抗拉强度的适宜开孔率为４％～６％．

The Appropriate Opening Ration of Plastic Filter Tube With Thin Wall and Low Strength

This paper deals with the basic demands for designing filter tube and the head loss occurring when groundwater enters into the filter from aquifer.The relations between the opening ration and the tensile strength,the specific well capacity and the head loss are also determined by model test.Based on the analysis of variable characters of the specific well capacity and the head loss with the opening ration,the paper verifies that the appropriate ration of the plastic filter tube with thin wall and low strength to meet the demands for well yield is 4%-6%.