| 边坡岩体系统的非线性演化和分岔研究 |
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| 引用本文： | 刘军,秦四清,张倬元.边坡岩体系统的非线性演化和分岔研究[J].成都理工大学学报(自然科学版),2000,27(4). |
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| 作者姓名： | 刘军 秦四清 张倬元 |
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| 作者单位： | 1. 成都理工学院工程地质研究所,成都,610059
2. 中国科学院地质研究所 |
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| 摘 要： | 应用 K.T.Chau在 A.Ruina单变量摩擦定律基础上建立的岩体系统分岔模型 ,分析了在实践中遇到的问题 ,结果表明边坡岩体系统在演化过程中会出现三个奇点类型 ,即焦点、结点及鞍点。在边坡岩体系统演化到焦点及结点处 ,即便有外界降雨因素影响 ,边坡最终会向稳定状态方向演化 ;而在鞍点处 ,边坡岩体将失稳。因此在同一地区 ,在相同外界扰动下 ,有的边坡岩体仍处于稳定状态 ,而有的边坡岩体将会失稳。该模型能较好地解释岩体的非线性演化过程
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| 关 键 词： | 岩体系统 非线性演化 分岔模型 奇点 外界降雨 失稳 |
A STUDY ON THE EVOLUTION OF ROCK MASS SYSTEM OF SLOPES AND ITS BIFURCATE MODEL |
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| LIU Jun,QIN Si-qing,ZHANG Zhuo-yuan.A STUDY ON THE EVOLUTION OF ROCK MASS SYSTEM OF SLOPES AND ITS BIFURCATE MODEL[J].Journal of Chengdu University of Technology: Sci & Technol Ed,2000,27(4). |
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| Authors: | LIU Jun QIN Si-qing ZHANG Zhuo-yuan |
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| Institution: | LIU Jun 1,QIN Si qing 2,ZHANG Zhuo yuan 1 |
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| Abstract: | A practical problem coming from field investigation is studied in this paper by using the bifurcate model presented by K.T.Chau. This model indicates that there are three possible types of equilibrium point in the phase space during the evolution of the rock mass system, i.e., spiral point and improper point and saddle point. Affected by external perturbation, such as rainfalls, the spiral point and improper point will be in stability , but the saddle point will fail to keep stability. Also, this model explains the phenomenon observed in the field wells, i.e, why one slope will be in stability , but another will be unstable in the same field area . This model will be possibly regarded as the theoretical basis of criterion of nonlinear evolution of a rock mass system. |
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| Keywords: | rock mass system nonlinear evolution bifurcate model equilibrium point external rainfall instability |
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