黔西三叠系永宁镇组(Ty)风化残积粘土矿物组成及力学性质  

MINERAL COMPOSITION AND MECHANICAL PROPERTIES OF WEATHERED RESIDUAL CLAY OF THE TRIASSIC YONGNINGZHEN FORMATION (Ty) IN WEST GUIZHOU

作　　者：郑玉元[1] 周丕康[1] 毛德明[1] 

机构地区：[1]贵州工业大学资源系,贵阳550003

出　　处：《矿物学报》1999年第2期251-256,共6页Acta Mineralogica Sinica

摘　　要：贵州西部三叠系永宁镇组（Ty）泥质类岩岩石风化粘土，是暖温带湿润气候条件下经风化、淋滤作用形成的区域性特殊土。这类土保存了母岩原生层面、层理构造，是区域性建筑材料及工业与民用建筑的地基。本文根据工程实践，采用室内试验，标准贯入试验、X射线衍射（XRD）方法分析Ty粘土的特殊工程性质，如高含水量、高孔隙比、高塑限、低承载力及其化学成分、矿物组成和力学性质之间的关系。为研究区域特殊立和解决工程实践问题提供理论依据。Mudstones of the Triassic Yongningzhen Formatlon in West Guizhou (Ty ) are composed of weathered clay formed through weathering and elucidation under humid climate in a warm temperate zone. Thls clay maintains primary bedded plane and stratification structure of the parent rock. It is the regional construction material and can serve as the foundation 0f industrial and civil construction.This paper, according to englneerlng practlce . analyzes the special engineering properties of(Ty) clay by indoor test. standard penetration test (SPT) and X-ray diffraction (XRD). The engineering propertles of (Ty) clay include high water content, high poricity ratio, high plastics limit,low load bearing, chemical composition and the relation between mineral composltion and mechanical property. It provides the theoretic basis for the study of regional special clay and the solution of problems of englneering practice.

关 键 词：永宁镇组 矿物组成 承载力 风化残积 粘土矿物 

分 类 号：P578.94[天文地球—矿物学] P512.21[天文地球—地质学]