| 含弱面块状结构岩质边坡稳定概率计算 |
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| 引用本文： | 苏永华,张月英,赵明华,伍文国.含弱面块状结构岩质边坡稳定概率计算[J].岩土力学,2008,29(4):871-875. |
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| 作者姓名： | 苏永华 张月英 赵明华 伍文国 |
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| 作者单位： | 湖南大学 土木学院，长沙 410082 |
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| 基金项目： | 国家自然科学基金
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湖南省交通厅科学基金
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湖南大学校科研和教改项目 |
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| 摘 要： | 首先采用不平衡推力模式分析块状结构岩体边坡稳定性系数的计算格式，推导了具体计算程序，并指出了该格式在可靠度计算中建立极限状态方程的困难；其次研究了解决该问题的近似方法，提出利用不平衡推力分析模式作为计算试验手段，通过计算试验提供样本数据，确定以岩体力学参数为自变量的修匀函数作为稳定性系数的近似解析式；然后以该函数为基础建立极限状态方程，利用验算点方法求解可靠度；最后分别利用该方法和传统的均差方法计算某工程问题。对比发现近似方法在精度上可满足要求，且计算工作量减少，表明了该方法的有效性。
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| 关 键 词： | 不平衡推力 斜坡 多滑面 可靠度 |
| 文章编号： | 1000-7598-(2008)04-871-05 |
| 收稿时间： | 2006-05-15 |
| 修稿时间： | 2006年5月15日 |
Calculation of stability probability of rock mass slope containing nubbly soft structure |
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| SU Yong-hua,ZHANG Yue-ying,ZHAO Ming-hua,WU Wen-guo.Calculation of stability probability of rock mass slope containing nubbly soft structure[J].Rock and Soil Mechanics,2008,29(4):871-875. |
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| Authors: | SU Yong-hua ZHANG Yue-ying ZHAO Ming-hua WU Wen-guo |
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| Institution: | College of Civil Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | According to imbalance thrust model, calculation format of stability coefficient was studied and the corresponding procedure of nubbly rock mass slope can be derived. It is very difficult to establish limit state equation under the condition of the format. An approximate method can resolve the problem. It is suggested that the sample data can be provided according to imbalance thrust analysis model which is used as a means of calculation and realized the smoothing function which takes rock mass mechanical parameters as independent variable as an approximate analytic expression. The limit state equation can be given according to the function and with the design point method slope stability reliability can be given easily. Finally, the stability probability of a project was analyzed by the above-mentioned method and the traditional mean deviations method respectively. Compared with the traditional mean deviations method, the approximate method can meet engineering requirement on accuracy and its calculation workload was decreased greatly. It is indicated that the approximate way is available. |
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| Keywords: | Imbalance thrust slope multi-sliding surface reliability |
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