| 用强度折减法和FLAC^3D计算边坡的安全系数 |
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| 引用本文： | 李新坡,陈永波,王永杰,何思明,王成华.用强度折减法和FLAC^3D计算边坡的安全系数[J].山地学报,2006,24(B10):235-239. |
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| 作者姓名： | 李新坡 陈永波 王永杰 何思明 王成华 |
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| 作者单位： | [1]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [2]聊城市水利局,山东聊城252000 |
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| 摘 要： | 对采用强度折减法和FLAC^3D计算边坡的安全系数问题进行了研究。对边坡破坏的判断标准、边坡滑面位置的确定及计算参数对安全系数计算结果的影响进行了分析。结果表明，用FLAC计算时，边坡的破坏可以通过节点最大不平衡力突变、节点最大速度突变、特定点位移的不收敛等特征进行判断，同时边坡破坏的滑面也可以由速度等值线图等方法表示出来。另外，通过分析发现，弹性常数、剪胀角等参数对安全系数计算结果的影响不大。
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| 关 键 词： | 安全系数 边坡 数值分析 强度折减法 |
| 文章编号： | 1008-2786-（2006）增-235-05 |
| 收稿时间： | 2006-03-08 |
| 修稿时间： | 2006-08-20 |
Factor of Safety Calculation of Slopes Using Strength Reduction Technique and FLAC^3D |
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| LI Xinpo, CHEN Yongbo, WANG Yongjie, WANG Chenghua.Factor of Safety Calculation of Slopes Using Strength Reduction Technique and FLAC^3D[J].Journal of Mountain Research,2006,24(B10):235-239. |
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| Authors: | LI Xinpo CHEN Yongbo WANG Yongjie WANG Chenghua |
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| Institution: | 1. Inst. of Mountain Hazards and Environment, Chinese Academy of Sci. , Chengdu 610041, China; 2. Liaocheng Water Conservancy Bureau, Liaocheng 252000 ,China |
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| Abstract: | In this paper, the strength reduction technique and FLAC^3D are used to calculate the factor of safety of slope. Firstly, the failure criterion of slope, location and shape of critical slip surface are analysised. Then the effects of deformation properties and shear dilatancy of soil to the results of factor of safety are checked. From the findings of this study, the failure of a slope can be determined by observation of maximum unbalanced force, maximum velocity of grid points, and displacement of special point et al. in FLAC numerical simulation procedure. At the same time, the critical slip surface of slopes can be figured out by velocity contour et al. Further study about the input parameters such as deformation properties and dilatancy angle shows that the results of strength reduction method did not affec by them. |
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| Keywords: | factor of safety slope numerical analysis shear strength reduction technique |
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