内蒙中部玄武岩残坡积膨胀土的研究  

A STUDY ON ELUVIAL-COLLUVIAL EXPANSIVE SOIL ON BALSLT IN CENTRAL NEI MONGOL

作　　者：王玉洲[1] 曲永新[1] 潘树成 吴芝兰[1] 徐晓岚[1] 

机构地区：[1]中国石油天然气管道勘察设计院,中国科学院地质研究所

出　　处：《工程地质学报》1995年第2期12-20,共9页Journal of Engineering Geology

摘　　要：本文是我们在内蒙中部所发现的一种新型膨胀土即玄武岩残积粘土的宏观微观综合研究结果。本文揭示了在内蒙中部异常发育的残积粘土的特殊的形成环境，并从物质成分、物理化学性质、微结构等方面探讨了不良工程特性形成的机理，并进行了膨胀土的工程评价。这类膨胀土在我国北方的发现，改变了对我国北方膨胀土形成发育规律的认识。This paper provides a reslut of macroscopic and microscopic study of a new type of expensive soil, the eluvial-colluvial clay on basalt, found in Central Nei Mongol.The formation environment of the eluvial-colluvial expensive soil abnormally developed in Central Nei Mongol is revealed and the formation mechanism of bed engineering properties is discussed from the composition, physical and chemical properties, and microstructure of the soil. Then an engineering evaluation of the expensive soil is made.The finding of this type of expensive soil in northern China leads to revise the knowledge on regulaities of formation and development of expensive soil in northern China.

关 键 词：玄武岩残积粘土 蒙脱石 膨胀土 热液作用 

分 类 号：P642.139[天文地球—工程地质学]