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Study on the relativities between Area Variation Regulation and the humid & sank characters of the Loessial Micro-configuration
Author(s): XUE wuhai, Wang Guisheng, CHEN Zhixin
Pages: 310-
312,316
Year: 2005
Issue:
4
Journal: GROUND WATER
Keyword: 黄土微结构; 湿陷性; 矿物颗粒; 微结构吸力;
Abstract: 黄土中的徽结构是影响黄土湿陷的重要因素.本文运用扫描电子显微镜对黄土微结构进行观察并对统计数据进行了分析,结果表明黄土微结构在区域上存在一定的变化规律.即,由西北的粒状、支架接触式结构,逐渐过渡到东南的凝块、镶嵌胶结式结构.通过对黄土矿物颗粒接触关系和孔隙与湿陷性的关系的分析,并根据非饱和土粒问吸力理论分析,认为支架结构孔隙为黄土湿陷变形提供了空间条件,而黄土微结构吸力空间分布的不均匀性是引起黄土湿陷的根本原因.
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