论文部分内容阅读
在孔隙水含水层地区的供水管井,填砾过滤器是最常见的结构形式。过滤器设计的合理性关系到井孔的出水量大小、含水层参数的正确性、建井成本和使用寿命等。笔者现对填砾过滤器设计中的人工填砾的颗粒粒径、填料层厚度、过滤管长度和口径等三方面问题进行分析和探讨。一、填砾的颗粒粒径问题目前一些论著对填砾颗粒粒径的确定,主要考虑:一为填粒粒径与含水层粒径 D_(50)或 D_(30)的比值,二为填砾的均匀系数。现将几个典型
In the case of aqueducts in pore aquifers, gravel filters are the most common form of construction. The rationality of the filter design relates to the amount of water in the borehole, the correctness of the parameters of the aquifer, the cost and service life of the well. The author is now on the gravel filter design artificial gravel particle size, packing thickness, length and diameter of the filter tube and other three aspects of the problem to be analyzed and discussed. First, the particle size of gravel gravel At present, some of the works on gravel particle size determination, the main considerations: one for the particle size and aquifer D_ (50) or D_ (30) ratio, the second is filled Gravel uniform coefficient. Now a few typical