| 岩体稳定性评价的单元安全系数法及其影响因素分析 |
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| 引用本文： | 舒谷生,彭文祥,何忠明,钟正强.岩体稳定性评价的单元安全系数法及其影响因素分析[J].科技导报(北京),2009,27(16):66-68. |
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| 作者姓名： | 舒谷生 彭文祥 何忠明 钟正强 |
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| 作者单位： | 舒谷生(湖南城市学院力学教研室,湖南益阳,413000);彭文祥,钟正强(中南大学地学与环境工程学院,长沙,410083);何忠明(长沙理工大学交通运输工程学院,长沙,410174) |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 岩体稳定性评价是岩体工程设计和施工的重要内容.为了探讨岩体各部位的安全情况,引入单元安全系数Ke来评价岩体的微观稳定性,它能定量评价岩体在应力作用下的稳定状况;通过理论分析,推导了单元安全系数公式,然后,利用算例研究,探讨了单元安全系数的影响因素.研究表明:①随抗剪强度参数、黏结力C、内摩擦角φ的增大,单元安全系数Ke逐渐增大;Ke与抗剪强度参数间符合显著线性关系;Ke随c变化的梯度明显大于Ke随φ变化的梯度,黏结力对单元安全系数的影响大于内摩擦角对单元安全系数的影响;②最小主应力增大引起单元安全系数增大,最大主应力增大引起单元安全系数减小,符合实际情况,并且二者与单元安全系数的关系均呈现指数关系特征.
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| 关 键 词： | 岩体 稳定性 单元安全系数 |
Element Safety Factor in Rock Stability Estimation and Its Influential Factors |
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| SHU Gusheng,PENG Wenxiang,HE Zhongming,ZHONG Zhengqiang.Element Safety Factor in Rock Stability Estimation and Its Influential Factors[J].Science & Technology Review,2009,27(16):66-68. |
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| Authors: | SHU Gusheng PENG Wenxiang HE Zhongming ZHONG Zhengqiang |
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| Institution: | SHU Gusheng1,PENG Wenxiang2,HE Zhongming3,ZHONG Zhengqiang2 1.Department of Mechanics,Hunan University of City,Yiyang 413000,Hunan Province,China 2.College of Geoscience , Environment Engineering,Central South University,Changsha 410083,China 3.Department of Communications , Transportation Engineering,Changsha University of Science , Technology,Changsha 410114,China |
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| Abstract: | Stability evaluation is an important part in the rock engineering design and construction.In order to study the safety of each part of the rock mass, the element safety factor Ke is proposed to estimate the micro-stability of the rock mass.The element safety factor can reflect the stability state of the rock mass under the earthstress.A formula for the element safety factor is derived by a theoretical analysis, and the influential factors for the element safety factor are studied in selected cases, which sh... |
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| Keywords: | rock mass stability element safety factor |
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