| 含孤石土质边坡稳定性及破坏特征的数值分析* |
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| 引用本文： | 李亮,朱建旺,赵炼恒,胡世红,左仕.含孤石土质边坡稳定性及破坏特征的数值分析*[J].中国安全生产科学技术,2021,17(8):43-49. |
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| 作者姓名： | 李亮 朱建旺 赵炼恒 胡世红 左仕 |
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| 作者单位： | （1.中南大学 土木工程学院，湖南 长沙 410075；2.中南大学 重载铁路工程结构教育部重点实验室，湖南 长沙 410075） |
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| 基金项目： | * 基金项目: 国家自然科学基金项目(51878668)；贵州省科学技术厅-科技支撑计划重点项目(黔科合支撑〔2018〕2815)；江西省交通运输厅重点工程科技项目（2019C0011） |
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| 摘 要： | 为探究花岗岩风化形成的风化球孤石对边坡稳定性及破坏特征的影响，利用摄影测量和数字图像处理技术，对大量的孤石进行拍照及处理，建立大量具有各种形状的孤石模型，从所建立的孤石模型中选取具有不同形状参数的孤石，将其导入ABAQUS软件，建立含有孤石的边坡模型，进行有限元强度折减分析。结果表明:孤石的位置和大小会对边坡的安全系数产生规律性影响，而孤石的形状对边坡安全系数的影响表现出不确定性；孤石对边坡破坏特征产生影响，塑性应变区发展过程及位移场分布在孤石处与均质边坡相比均有较大变化。
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| 关 键 词： | 孤石边坡 边坡稳定性 破坏特征 有限元法 |
Numerical analysis on stability and failure characteristics of soil slope containing solitary stone |
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| LI Liang,ZHU Jianwang,ZHAO Lianheng,HU Shihong,ZUO Shi.Numerical analysis on stability and failure characteristics of soil slope containing solitary stone[J].Journal of Safety Science and Technology,2021,17(8):43-49. |
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| Authors: | LI Liang ZHU Jianwang ZHAO Lianheng HU Shihong ZUO Shi |
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| Affiliation: | (1.School of Civil Engineering,Central South University,Changsha Hunan 410075,China;2.Key Laboratory of Heavy-Haul Railway Engineering Structure,Ministry of Education,Central South University,Changsha Hunan 410075,China) |
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| Abstract: | In order to explore the influence of weathered spheroidal solitary stone formed by granite weathering on the slope stability and failure characteristics,the photogrammetry and digital image processing techniques were used to photograph and process a large number of solitary stone,and a large number of models for the solitary stone with various shapes were established.The solitary stone with various shape parameters were selected from the established solitary stone models,and imported into the ABAQUS software to establish the slope model containing solitary stone,then the reduction analysis on finite element strength was conducted.The results showed that the position and size of the solitary stone had the regular influence on the safety factor of slope,while the shape of solitary stone had the uncertain influence on the safety factor of slope.The solitary stone had influence on the failure characteristics of slope,and both the development process of plastic strain zone and the distribution of displacement field at the position of solitary stone had great changes compared with the homogeneous slope. |
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| Keywords: | solitary stone slope slope stability failure characteristic finite element method |
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