| 岩体开挖卸荷过程力学特性分析 |
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| 引用本文： | 胡海浪,黄秋枫.岩体开挖卸荷过程力学特性分析[J].灾害与防治工程,2008(2). |
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| 作者姓名： | 胡海浪 黄秋枫 |
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| 作者单位： | 三峡大学三峡库区地质灾害教育部重点实验室; |
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| 摘 要： | 基于岩体开挖卸荷过程中力学参数变化理论的分析研究,建立卸荷岩体有限元分析模型,运用ADINA有限元分析软件对岩体进行一维卸荷数值仿真研究。根据有限元数值分析计算成果得到岩体力学参数与主卸荷方向累计开挖卸荷量间的变化关系曲线。结果表明:岩体开挖卸荷过程中,岩体力学参数变形模量、泊松比、粘聚力和内摩擦角等呈现出随开挖卸荷量的变化而发生变化的特征,随卸荷量的增大有减小的趋势,但它们不是从初始值一直减小到零,而是随卸荷量的增大减小到一定的量值后,岩体的裂隙张开、结构面的扩展到一定的程度,岩体的力学参数保持一定的量级不再减小。
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| 关 键 词： | 岩体开挖卸荷 力学参数 理论分析 主卸荷方向 卸荷区 累计卸荷量 力学特性 |
Mechanical Characteristics Analysis of Rock Mass during Excavation and Unloading Process |
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| Hu Hailang Huang Qiufeng.Mechanical Characteristics Analysis of Rock Mass during Excavation and Unloading Process[J].Disaster and Control Engineering,2008(2). |
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| Authors: | Hu Hailang Huang Qiufeng |
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| Abstract: | In this paper,the theoretical analysis about mechanical parameters of rock mass during the excavation and unloading process is studied.A finite element analytical model of unloading rock mass is set up.A one-dimension numerical simulation case study for rock mass using finite element is analyzed by using ADINA.According to the calculated results with finite element numerical analysis,it acquires the related curves between some mechanical parameters of rock mass and accumulative unloading quantity in the mai... |
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| Keywords: | excavation and unloading of rock mass mechanical parameters theoritical analysis main unloading direction unloading zone accumulative unloading quantity mehcanical characteristic |
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