在水井建设施工中，为保证管井能正常出水，除必须严格按成井工艺要求施工外，还应当正确设计管井的结构。过滤器是地下水进入井内的通道，在松散地层中，过滤器设计是管井结构设计最关键的环节。因为缠丝过滤器制作简便，经久耐用，使用效果好，尤其第四纪松散沉积物颗粒不 In the well construction and construction, in order to ensure that the tube well can produce water normally, it is necessary to correctly design the structure of the well tube in addition to the construction strictly required by the well completion technology. The filter is the passage of groundwater into the well. In the loose formation, the filter design is the most crucial part of the design of tube well structure. Because the silk filter making simple, durable, good effect, especially the Quaternary loose sediment particles do not