滤网塞式钢筋混凝土过滤器     

唐新志  孟昭亮 《地下水》1992,14(2):88-91

过滤器(也称滤水管),通常被认为是管井的心脏。因此,过滤器的质量直接关糸着成井质量的高低。一种由高密度聚乙烯滤网塞和穿孔钢筋混凝土管组装成的新型过滤器研制成功。其开孔率为19%,轴向压强为14MPa,配以不同规格滤网塞,可以广泛应用于各种类型水文地质条件的含水层。本文着重介绍了该过滤器的规格性能、经济技术指标和使用情况。  相似文献   

抽水试验中常遇问题的分析   总被引：1，自引：0，他引：1       下载免费PDF全文

陈小烽 《探矿工程》2001,(5):43-43,51

分析了水利水电工程钻孔抽水试验工作中如何选择抽水设备、确定抽水孔结构、过滤管孔隙率和滤网孔眼的大小。  相似文献   

Artificial Neural Network Model for Discrimination of Stability of Ancient Landslide in Impounding Area of Three Gorges Project, China     

ZhouPinggen 《中国地质大学学报(英文版)》2003,14(2):161-165

The factors of geomorphology, geological setting, effect of ground water and environment dynamic factors (e.g. rainfall and artificial water recharge) should be integrated in the discrimination of the stability of the ancient landslide. As the criterion of landslide stability has been studied, the artificial neural network model was then applied to discriminate the stability of the ancient landslide in the impounding area of the Three Gorges project on the Yangtze River, China. The model has the property of self-adaptive identifying and integrating complex qualitative factors and quantitative factors. The results of the artificial neural network model are coincided well with what were gained by classical limit equilibrimm analysis (the Bishop method and Janbu method) and by other comprehensive discrimination methods.  相似文献