低地应力区碎裂结构围岩基本特征研究  

COMPOSITION AND MICROSTRUCTURE PROPERTIES OF DISCRETE STRUCTURAL SURROUNDING ROCKMASS IN THE LOW GEOSTRESS REGION

作　　者：胡夏嵩[1] 赵法锁[2] 

机构地区：[1]清华大学工程力学系 [2]长安大学地测学院,西安710061

出　　处：《工程地质学报》2004年第4期396-400,共5页Journal of Engineering Geology

基　　金：中国博士后科学基金资助项目

摘　　要：以某市引水工程地下洞室围岩为例 ,采取试验样品若干件 ,分别做了围岩的平均化学成分与百分含量衍射以及电镜扫描分析 ,并得到了相应的结果。在此基础上 ,从成分和微观结构两方面入手 ,总结出低地应力区碎裂结构围岩组成与显微结构方面的特征和变化规律 ,初步探讨了低地应力区碎裂结构围岩微观变形特征 ,这为进一步研究低地应力区围岩宏观变形破坏及其稳定性等方面 。This paper presents analytical results of composition and microstructure of the discrete structural surrounding rock mass in a low geostress region. Rock samples, taken from the surrounding rock mass at different locations of the underground excavation for a water conveyance project, are analyzed for chemical composition, average percentage of content, and microstructures by using electron diffraction and electron-scan microscope. The micro-deformation of the rock is then characterized, thus providing guidelines for further study for macro deformation, failure and stability of rock masses in the low geostress region.

关 键 词：围岩 碎裂结构 地应力 变形破坏 变形特征 地下洞室 岩基 基础 试验样品 均化 

分 类 号：P534.1[天文地球—古生物学与地层学] TD353[天文地球—地质学]