[关键词]
[摘要]
饱和黏性土的渗透系数作为水文地质学中的一个重要参数, 其作用是不可忽略的。国内外对于饱和黏性土渗 透系数的测定, 按测试地点的不同分为室内测试和现场测试方法。测试方法所采用的原理还是以达西定律和太沙 基固结理论为主。对于饱和黏性土渗透系数的测试方法较多, 但目前尚未形成一套完整的测试体系, 测定的方法存 在较多不足, 测定所选用的仪器也有较多不合理性, 为此, 回顾了渗透系数测定的历史, 探讨了饱和土渗流发生的机 理, 并总结了饱和土渗透系数的室内测试方法和现场测试方法, 在介绍了传统的测试方法之后, 又介绍了溶质示踪 法、 固结曲线确定渗透系数等新的方法, 最后针对如何测定饱和土渗透系数进行了探讨。
[Key word]
[Abstract]
Permeability coefficient of saturated clay is an important parameter in hydrogeology, and its testing methods include la 2 boratory and in 2situ methods according to different testing sites. Darcy cs Law and Terzaghi consolidation theory are main theo2 ries applied in the testing methods. However, there is not a complete test system, and current testing methods and instruments have their own deficiencies and irrationality. In this paper, the history of measurement methods of permeability coefficient in the saturated clay is reviewed, the mechanism of the seepage in the saturated soil is discussed, and the laboratory and in 2situ testing methods are summarized. Besides the traditional testing methods, the new test methods to determine permeability coefficient, such as tracer method and consolidation curve, are introduced. Finally, the paper discusses how to determine permeability coeffi 2 cient in the saturated soil.
[中图分类号]
[基金项目]
国家自然基金项目/ 华北平原深层地下水超采引起的黏性土再固结效应研究0( 40472139)