| 基于应变软化的多阶边坡稳定分析 |
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| 引用本文： | 邓 琴,汤 华,王东英,秦雨樵,吴振君.基于应变软化的多阶边坡稳定分析[J].岩土力学,2018,39(11):4109-4116. |
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| 作者姓名： | 邓 琴 汤 华 王东英 秦雨樵 吴振君 |
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| 作者单位： | 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071；2.中国科学院大学，北京 100049 |
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| 基金项目： | 国家自然科学基金（No. 51608518, No. 41202226）；云南省交通运输厅科技项目(云交科教[2016]163号一（三）);陆地交通气象灾害防治技术国家工程实验室开放基金（No. NELBP201601） |
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| 摘 要： | 多阶边坡除了最危险滑面需要关注，每级台阶的潜在滑面及其他不满足规范要求的滑面亦需要得到重视。以双台阶边坡和复杂多台阶边坡为例，基于应变软化理论，利用FLAC3D软件分析边坡的剪应变发展规律，根据剪应变的集中带获取边坡的多个潜在滑面。分析滑面的剪入、剪出和滑面中部点的强度参数变化规律，并结合矢量和法分析滑面在应变软化过程中安全系数的演化规律。研究结果表明：采用该方法可获取边坡的最危险滑面及次级滑动面；随着软化的发展，滑面上点的强度参数从峰值强度逐渐降低至残余强度，然而演化的速度不同；随着应变软化过程的发展，所有滑面的安全系数均逐渐降低，最后趋于一个定值。
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| 关 键 词： | 多级边坡 应变软化 矢量和法 |
| 收稿时间： | 2017-02-23 |
Bench-shape slope stability analysis based on strain softening model |
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| DENG Qin,TANG Hua,WANG Dong-ying,QIN Yu-qiao,WU Zhen-jun.Bench-shape slope stability analysis based on strain softening model[J].Rock and Soil Mechanics,2018,39(11):4109-4116. |
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| Authors: | DENG Qin TANG Hua WANG Dong-ying QIN Yu-qiao WU Zhen-jun |
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| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | In addition to the critical slip surface, the potential slip surface of each step and other slip surfaces which do not meet the specification requirements of bench-shape slope also need to be considered. Based on strain softening theory, the development of shear strain in bench-shape slope is simulated by FLAC3D, and the multi-slip surfaces have been obtained. Meanwhile, the strength parameters and evolution of safety factor of slip surface in strain softening process have been analyzed by using vector sum method. Examples of double-step slope and complex multi-step slope show that: the critical and secondary slip surfaces can be obtained; the strength parameters in the slip surfaces gradually change from peak strength to residual strength as the strain softening progresses. However, the speed is different. With the development of strain softening process, the safety factor of all slip surfaces reduces gradually, and finally tends to a constant value. |
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| Keywords: | bench-shape slope strain softening model vector sum method |
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