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一、岩溶裂隙水管井的设计在基岩中取水的管井结构,因岩层的稳定情况及上部覆盖层的情况而不同。一般在上部覆盖层和基岩的风化带,必须安装井管并用粘土或水泥浆封闭。下部的基岩裂隙溶洞发育,抽水时无坍塌现象,可不安装井壁管和过滤器。反之,如果大量抽水有坍塌掉块现象或是在强震地区建井,则应安装牢固的井壁管或过滤器。图1所示为一般基岩中取水管井的结构,上部为覆盖层,此层是否取水视其富水及水质情况而定。下部为基岩
I. Design of karst fissure wells Tube wells that draw water from bedrock are different because of the stability of the rock and the conditions of the upper cover. Generally in the weathering zone of the upper cover and bedrock, well pipes must be installed and closed with clay or grout. The bottom rock fissures in the lower part of the cave are developed and there is no collapse during pumping, and the well wall pipes and filters may not be installed. Conversely, if a large amount of pumping has collapsed or a well is built in a strong earthquake area, a solid well wall pipe or filter should be installed. Figure 1 shows the structure of a water intake pipe well in general bedrock. The upper part is a cover layer. Whether the water is taken from this layer depends on its rich water and water quality. The lower part is bedrock