IMECH-IR  > 环境力学重点实验室(2009-2011)
花岗片麻岩峰前围压卸荷条件下力学特性的实验研究
Alternative TitleExperiment research about mechanical characteristic of gneissic granite while confining pressure is unloaded
范永波; 伍法权; 和海芳; 任爱武
Source Publication水文地质工程地质
2011
Volume38Issue:3Pages:54-58
ISSN1000-3665
Abstract对小湾水电站坝基花岗片麻岩试件进行了室内不同直径、不同峰前围压卸荷试验。结果表明:相同围压下,卸载同加载相比,变形模量变化不大,但泊松比大幅增加,甚至会超过0.5;在相同围压卸荷时,不同尺寸的试样会呈现不同的破坏性状,尺寸越大,越容易产生张破坏;岩块的峰值强度随着围压升高呈线性增加,且尺寸越大受围压变化的影响越小,存在明显的尺寸效应。
Other AbstractUnloading confining pressure tests are conducted before different pre-peak confining pressure of gneissic granite obtained at the foundation of Xiaowan hydrodynamic station,the results show that the deformation modulus changes little,but poisson’s ratio increases greatly compared with the loading conditions under the same confining pressure.Samples with different sizes will show different behaviors under the same unloading confining pressure,and the sample with a larger size will show tensile failure;The peak-stress of the sample will increase linearly with the confining pressure increasing,and size effect is obvious,namely,the larger the size of sample,the less the influence of the confining pressure change.
Keyword花岗片麻岩 峰前卸围压 力学参数
Subject Area力学
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Indexed ByCSCD
Language中文
Funding Organization973项目“重大工程地质灾害的预测理论及数值分析方法研究”(2010CB731502);国家自然科学基金项目(10702072)
CSCD IDCSCD:4193630
DepartmentLMFS工程地质体力学(LEM)
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/45011
Collection环境力学重点实验室(2009-2011)
Corresponding Author范永波
Recommended Citation
GB/T 7714
范永波,伍法权,和海芳,等. 花岗片麻岩峰前围压卸荷条件下力学特性的实验研究[J]. 水文地质工程地质,2011,38(3):54-58.
APA 范永波,伍法权,和海芳,&任爱武.(2011).花岗片麻岩峰前围压卸荷条件下力学特性的实验研究.水文地质工程地质,38(3),54-58.
MLA 范永波,et al."花岗片麻岩峰前围压卸荷条件下力学特性的实验研究".水文地质工程地质 38.3(2011):54-58.
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