| 基于瑞典条分法的应变软化边坡稳定性评价方法 |
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| 引用本文： | 张嘎,张建民.基于瑞典条分法的应变软化边坡稳定性评价方法[J].岩土力学,2007,28(1):12-16. |
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| 作者姓名： | 张嘎 张建民 |
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| 作者单位： | 清华大学,水沙科学与水利水电工程国家重点实验室,北京,100084 |
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| 摘 要： | 引入简化的应变协调方程，基于瑞典条分法的基本原理，提出一个新的能够考虑土的剪应力-应变关系的应变软化边坡稳定性简化分析方法。推导了该方法的计算公式，提出了具体算法并编制了计算程序，分析了不同应变软化特性的边坡稳定性。实际应用表明，该方法简单可靠、效率较高，计算所采用的分条数量和初始滑裂面位置对计算结果精度的影响均很小。应变软化边坡的安全系数介于基于峰值强度和残余强度的极限平衡条分法计算结果之间，具体数值不仅取决于土的抗剪强度指标，还与其剪应力-应变关系密切相关。
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| 关 键 词： | 边坡 稳定性 应变软化 条分法 |
| 文章编号： | 1000-7598-（2007）01-0012-05 |
| 收稿时间： | 2005-04-12 |
| 修稿时间： | 2005-04-12 |
Stability evaluation of strain-softening slope based on Swedish slice method |
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| ZHANG Ga,ZHANG Jian-min.Stability evaluation of strain-softening slope based on Swedish slice method[J].Rock and Soil Mechanics,2007,28(1):12-16. |
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| Authors: | ZHANG Ga ZHANG Jian-min |
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| Institution: | State Key Laboratory of Hydroscience and Hydraulic Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | A new method was presented to evaluate the stability of a slope with strain-softening behavior through introducing a simplified strain compatibility equation of the slope and expanding the concept of Swedish slice method. The formula of the simplified method were derived and their algorithm was programmed into a software. The method was confirmed to be reliable and efficient by the practical applications. The slice number and assumed initial slide surface have little effect on the stability analysis accuracy. The stability factors and corresponding critical surfaces of slopes with different strain-softening behaviors were analyzed with the presented method. The results show that the factor of stability of a strain-softening slope depends not only on the strength parameters but also on the shear stress-strain relationship of soil, which is less than the one corresponding to peak strength and more than the one corresponding to residual strength by the limit equilibrium method. |
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| Keywords: | slope stability strain-softening slice method |
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