浸泡条件下二云英片岩物理性质试验研究  

Physical Properties Research of Quartz Mica Schist under the Condition of Immersion Test

作　　者：肖蕾[1] 刘杰[1] 范留军 胡静[1] 

机构地区：[1]三峡大学土木与建筑学院,443002

出　　处：《灾害与防治工程》2013年第2期19-23,共5页Disaster and Control Engineering

摘　　要：对丹巴地区二云英片岩进行为期28d的纯水浸泡试验，每4d测量所有岩样的质量、几何尺寸及纵波波速，并取其中一个岩样进行单轴抗压强度测试。研究表明：由水浸泡引起的岩样质量、容重及纵波波速变化较小，均呈现先增加后趋于平稳的趋势；单轴抗压强度、弹性模量及泊松比的变化也较小，最后趋于不变。由于该二云英片岩组成成分中几乎不存在与水反应的物质，可推知岩样上述指标的变化主要是由片理之间的渗水通道不断被水填充，导致摩擦阻力减小而引起的，岩样饱和后这些指标将不再发生变化。说明二云英片岩对纯水的敏感性较低，受纯水的影响较小。Abstract It takes a pure water immersion test lasting 28 days with Danba quartz mica schist. Every 4 days, the quality, physical dimension and longitudinal wave velocity of all rock samples are measured, and one sample is used to test its uniaxial compressive strength. The research suggests that the quality, unit weight and longitudinal wave veloci- ty have few changes in the water immersion condition, which all shows the tendency of in- creasing first and then keeping invariable. The uniaxial compressive strength, elasticity modulus and Poisson＇s ratio also change a little and finally tend to be stable. Because there exists almost no material that reacts with water, it can be inferred that the variations of a- bove indicators are mainly caused by the decrease of friction resistance as the water seepage channels between schistosities are continuously filled with water. After the samples are saturated, these indicators will no longer change. It shows that the water sensitivity of quartz mica schist is relatively low, that is, the quartz mica schist is less affected by purewater.

关 键 词：二云英片岩 纯水浸泡 纵波波速 变形参数 

分 类 号：P588.344[天文地球—岩石学]