| 岩质边坡滑动-倾倒组合破坏模式稳定性分析 |
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| 引用本文： | 杨保军,何 杰,吉 刚,赵廷华.岩质边坡滑动-倾倒组合破坏模式稳定性分析[J].岩土力学,2014,35(8):2335-2341. |
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| 作者姓名： | 杨保军 何 杰 吉 刚 赵廷华 |
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| 作者单位： | 1.郑州大学 水利与环境学院，郑州 450001；2.河南省水利勘测设计研究有限公司，郑州 450016 |
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| 摘 要： | 在岩质边坡滑动-倾倒组合破坏地质力学模型的基础上，采用改进的传递系数法，提出了岩质边坡滑动-倾倒组合破坏的解析分析方法，并对初始下滑推力及岩块底部的凝聚力进行敏感性分析。与传递系数法相似，将边坡体几何力学参数及潜在倾倒岩块编号作为变量，使得每个倾倒岩块的稳定性分析具有统一的表达式，并易于采用Microsoft excel进行程序化分析。分析结果表明：岩块底面的凝聚力对下部潜在倾倒区域的破坏模式影响较大，随着岩块底面凝聚力的增加，潜在倾倒区域发生倾倒破坏的块体呈逐渐增加的趋势，而发生滑动破坏的块体则明显较少，岩块底面倾角对坡体整体稳定性影响较大；随着岩块底面倾角的增大，整个坡体的稳定性逐渐降低。
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| 关 键 词： | 倾倒破坏 传递系数法 解析方法 滑动-倾倒组合破坏 |
| 收稿时间： | 2013-04-22 |
Stability analysis of sliding-toppling complex failure of rock slope |
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| YANG Bao-jun,HE Jie,JI Gang,ZHAO Ting-hua.Stability analysis of sliding-toppling complex failure of rock slope[J].Rock and Soil Mechanics,2014,35(8):2335-2341. |
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| Authors: | YANG Bao-jun HE Jie JI Gang ZHAO Ting-hua |
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| Institution: | 1. College of Water Conservancy and Environmental Engineering, Zhengzhou University, Zhengzhou 450001, China; 2. Henan Water & Power Engineering Consulting Co., Ltd., Zhengzhou 450016, China |
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| Abstract: | An analytical solution is developed for sliding-toppling complex failure of rock slope, based on the corresponding failure mechanisms and the transfer coefficient method for entire block toppling failure. Moreover, the influences of initial sliding force from unstable set of rock slope and the cohesive force of block base are also analyzed. In order to have uniform expressions, the variables are expressed by the geomechanical parameters of the slope and the serial number of the block in this proposed method. Consequently, the stability of sliding-toppling complex failure of rock slope can be easily analyzed using a Microsoft Excel spreadsheet. This proposed method is applied to a practical rock slope. The results show that the cohesion of block base has significant influence on the failure model of susceptible toppling block, with increasing of the cohesion, the area of block toppling failure increases and the area of sliding failure obviously decreases. It is good agreement with previous research of block toppling failure that the relative angle of block base have significant influence on the entire stability of the complex rock slope; and the safety factor of the rock slope decreases with increasing of the relative angle of block base. |
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| Keywords: | toppling failure transfer coefficient method analytical method sliding-toppling complex failure |
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