石英云母片岩横观各向同性强度参数试验研究

发布时间：2018-06-21 12:11

本文选题：岩石力学 + 各向异性　；参考：《岩石力学与工程学报》2017年S2期

【摘要】：通过劈裂试验对石英云母片岩的抗拉强度、变形模量、泊松比等各向异性参数开展研究,研发单个岩样测不同劈裂面与片理夹角下岩石抗拉强度的试验方法;根据单个岩样多次劈裂后岩样抗拉强度相对差值和方差值的大小,提出一种辨别砂岩均匀性好与差的方法。结果表明:岩样抗拉强度、拉伸弹性模量、泊松比和劈裂面与片理夹角?的变化规律如下:石英云母片岩抗拉强度随?的递增而呈线性递增规律;抗拉强度尺寸效应随?的递增而呈线性递减规律;抗拉强度各向异性程度随着岩样的高度增加而逐渐降低;当0°?50°时,拉伸模量随着?的增加而减小,而泊松比随着?的增加而增加;当50°?90°时,拉伸模量随着?的增加而增加,而泊松比随着?的增加而减小。对干燥、饱和两种状态的岩样进行了室内单、三轴试验,结果表明:石英云母片岩在在干燥及饱和状态下均属于低各向异性岩体;干燥及饱和两种状态下弹性模量、内摩擦角、黏聚力随围压的递增呈线性递增规律。
[Abstract]:The tensile strength, deformation modulus and Poisson's ratio of quartz mica schist are studied by splitting test. According to the relative difference of tensile strength and square difference of rock samples after multiple fracturing of a single rock sample, a method for distinguishing the uniformity and difference of sandstone is proposed. The results show that the tensile strength, tensile elastic modulus, Poisson's ratio and the angle between the split surface and the cleavage of the rock samples? The variation law of quartz mica schist is as follows: the tensile strength of quartz mica schist with? The size effect of tensile strength with? The anisotropy of tensile strength decreases with the height of rock sample, and the tensile modulus increases with 0 掳~ 50 掳. And Poisson's ratio increases with? The tensile modulus increases with the increase of 50 掳~ 90 掳. The Poisson ratio increases with the increase of? Increase and decrease with the increase of The results of laboratory uniaxial and triaxial tests on dry and saturated rock samples show that quartz mica schist belongs to low anisotropic rock mass under both dry and saturated conditions, and its elastic modulus and internal friction angle are both dry and saturated. The cohesive force increases linearly with the increase of confining pressure.
【作者单位】：三峡大学土木与建筑学院;三峡大学三峡库区地质灾害教育部重点实验室;北京建工新型建材有限责任公司;
【基金】：长江科学院开放研究基金资助项目(CKWV2016377/KY) 国家自然科学基金资助项目(51579138) 湖北省教育厅项目(D20161202)~~
【分类号】：TU45

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