| 岩体结构面间距的双参数负指数分布研究 |
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| 引用本文： | 胡秀宏,伍法权.岩体结构面间距的双参数负指数分布研究[J].岩土力学,2009,30(8):2353-2358. |
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| 作者姓名： | 胡秀宏 伍法权 |
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| 作者单位： | 中国科学院地质与地球物理研究所 工程地质力学重点实验室，北京 100029 |
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| 基金项目： | 中国科学院工程地质力学重点实验室开放基金 |
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| 摘 要： | 通过对负指数分布模型函数的分析，推导了负指数分布的极大值函数，证明在岩体结构面实测数据的回归分析中，负指数分布存在局限性。改用双参数负指数分布作为模型函数后，能克服负指数分布的缺点，继承其优点，提高回归分析的拟合度。回归分析的方法使用最小二乘法曲线回归方法。在云南小湾水电站坝基槽边坡结构面的统计中，双参数负指数分布作为回归分析的模型函数得到了成功运用。
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| 关 键 词： | 结构面间距 双参数负指数分布 小湾水电站 最小二乘法 |
| 收稿时间： | 2008-03-03 |
Research on two-parameter negative exponential distribution of discontinuity spacings in rock mass |
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| HU Xiu-hong,WU Fa-quan.Research on two-parameter negative exponential distribution of discontinuity spacings in rock mass[J].Rock and Soil Mechanics,2009,30(8):2353-2358. |
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| Authors: | HU Xiu-hong WU Fa-quan |
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| Institution: | Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Negative exponenial form of frequency vs spacing value curve was confirmed by many field discontinuity spacing surveys of rock mass. This article derived the max-value function of the negative exponential form, and argued that the limitation of negative exponential form is really presence. While using the two-parameter negative exponential form by way of regression analysis 'pattern function instead of negative exponential form, the limitation will disappear. The two-parameter negative exponential form could bump regression analysis 'degree of fitting up。Least square curvilinear regression method was considered as the most conformable regression-type analysis. The two parameter negative exponential form have been used on the statistics of dam foundation rock mass discontinuity spacings of Yunnan Xiaowan Hydropower Station successfully. |
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| Keywords: | discontinuity spacings two-parameter negative exponential distribution Xiaowan Hydropower Station least square method |
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