| 考虑剪胀和软化的巷道围岩弹塑性分析 |
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| 引用本文： | 魏建军.考虑剪胀和软化的巷道围岩弹塑性分析[J].土木建筑与环境工程,2013,35(3):7-11. |
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| 作者姓名： | 魏建军 |
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| 作者单位： | 中国矿业大学 深部岩土力学与地下工程国家重点实验室，江苏 徐州，221008；江苏建筑职业技术学院 江苏省建筑安全与减灾工程研发中心，江苏 徐州，221116 |
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| 基金项目： | 国家自然科学基金(51174196);江苏省教育厅高校科研成果产业化推进项目(JHB2011-66、JHB2012-69);江苏省高校青蓝工程资助 |
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| 摘 要： | 在应力跌落模型的基础上引进软化阈值，建立了弹塑脆性模型，模拟岩土材料的脆性软化性质。基于Mohr-Coulomb准则，考虑了岩土材料屈服后的塑性软化和体积膨胀，推导了圆形巷道围岩的软化区半径、塑性区半径、洞周位移及围岩内应力表达式，最后通过算例分析了剪胀、软化程度和弹模劣化对破裂区范围的影响，为巷道的稳定分析以及支护设计提供理论依据。
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| 关 键 词： | 巷道 弹塑性 剪胀 软化 解析解 |
Elastic-Plastic Analysis of Surrounding Rocks Considering Material Dilatancy and Softening |
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| Wei Jianjun.Elastic-Plastic Analysis of Surrounding Rocks Considering Material Dilatancy and Softening[J].土木建筑与环境工程,2013,35(3):7-11. |
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| Authors: | Wei Jianjun |
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| Abstract: | Based on stress dropping model, an elastoplastic-brittle model was established by using a softening threshold value to model the features of the geotechnical materials. According to the Mohr-Coulomb criterion, the radius of the rupture and plastic zone, the displacement and stress expressions of surrounding rock were obtained with the consideration of the strain-softening and dilatancy of geotechnical materials. Furthermore, the model was verified by case study and the influence of strain-softening, dilatancy and elastic modulus deterioration on calculation result were presented. |
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