摘要
介绍了几内亚体育场岩土层结构和粘土的工程地质特征,将其与国内红粘土进行了比较,认为是属于基性岩风化而形成的红粘土,并探讨了该红粘土的形成过程。从元素迁移规律着手,分析了形成该地剖面上特殊的岩土层序的形成原因,从化学成份和分子结构着手分析了该粘土物理力学性质的形成原因。进而分析了几内亚红粘土工程地质评价中应注意的问题。
Guinea lies in the west of Africa. The author analyzes the genesis and evolution of clays and clay structures over there and makes a comparison with the red clay occurred in some areas in China. The clay is originated from the weathering of basic rocks. The clay thickness is commonly 10m -30m, usually presents maroon or brown-red in Guinea, and is characteristic of high saturation degree, high liquid limit, high void ratio , high shear strength and moderate-low compressibility. In light of element migration rules, the author analyses the formation genesis of the specific litho-sequence at the study site. And in lights of chemical components and molecule texture, the author analyses the physi-mechanical properties of the red clay and some issues noticeable in the course of engineering geological evaluation.
出处
《江苏地质》
2007年第2期147-150,共4页
Jiangsu Geology
关键词
红粘土
工程地质特征
成因分析
工程地质评价
几内亚
非洲西部
Red clay
Engineering geological characteristics
Genesis analysis
Engineering geological evaluation
Guinea, West Africa
