基于微观试验的片岩力学特性研究  

A Study of the Mechanical Property of Schist Based on Microscopic Tests

作　　者：王家兴[1,2] 石豫川[1] 段伟锋 吉锋[1] 陈国庆[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]成都市勘察测绘研究院,成都610081 [3]中国水电工程顾问集团华东勘测设计研究院,杭州310014

出　　处：《现代隧道技术》2014年第3期73-78,共6页Modern Tunnelling Technology

基　　金：地质灾害防治与地质环境保护国家重点实验室自由探索课题(SKLGP2011Z009);国家自然科学基金项目(51308082;41002110;41272330)

摘　　要：岩石的微观特性往往能很好地反映其宏观性质,深入研究微观特性对宏观性质的把控及工程实际应用具有十分重要的意义。文章利用铸体薄片试验、电镜扫描试验手段,结合点荷载试验及常规力学试验测试成果,对西南某水电站勘探平洞围岩进行了矿物组成和微观结构的试验研究,分析岩石微观特征与宏观力学性质的相关性,并从微观角度阐述了岩石微观特性对围岩稳定性的影响,为隧洞围岩支护设计、施工奠定了理论和技术基础。Generally, the macroscopic properties of a rock are reflected well in its micro-characteristics, so further research of microscopic properties is significant to the understanding of macroscopic properties and their practical applications in engineering. Using a lamellar casting test and a scanning electron microscope test, as well as the results of a point-loading test and a conventional mechanical test, the mineral composition and microstructure of surrounding rocks in the exploration adit of a hydropower station in southwest China was experimentally studied. The correlation between the micro-character and macro-mechanical properties of the rock was analyzed and the effects of the rock＇s micro-characteristics on the stability of the surrounding rock was stated from a microscopic view to establish the theoretical and technical basis for the design and construction of the tunnel support.

关 键 词：片岩微观结构 力学性质 围岩稳定性 

分 类 号：TU458.3[建筑科学—岩土工程]