| 土体抗剪强度指标的概率分布类型研究 |
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| 引用本文： | 陈立宏,陈祖煜,刘金梅.土体抗剪强度指标的概率分布类型研究[J].岩土力学,2005,26(1):37-40. |
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| 作者姓名： | 陈立宏 陈祖煜 刘金梅 |
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| 作者单位： | 1. 北京交通大学 土木建筑学院，北京 100044；2. 中国水利水电科学研究院，北京，100044； 3. 国家防汛抗旱总指挥部办公室，北京，100055 |
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| 基金项目： | 北京交通大学人才科研基金(编号:2003RC030) |
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| 摘 要： | 土的抗剪强度指标概率分布的类型，影响着风险评价和可靠度分析的结果。通过收集整理的多个水利工程中丰富的长序列的抗剪强度试验资料，在此基础上利用K-S法对土体抗剪强度指标的概率分布类型进行了统计分析，发现一般情况下抗剪强度指标均可以接受正态分布和对数正态分布，而选择对数正态分布能够避免出现物理量为负的现象，在许多情况下这样处理更为合理、简便。
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| 关 键 词： | 抗剪强度 概率分布类型 可靠度 土石坝 |
| 文章编号： | 1000-7598-(2005)01-0037-04 |
| 收稿时间： | 2003-11-19 |
Probability distribution of soil strength |
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| CHEN Li-hong,CHEN Zu-yu,LIU Jin-Mei.Probability distribution of soil strength[J].Rock and Soil Mechanics,2005,26(1):37-40. |
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| Authors: | CHEN Li-hong CHEN Zu-yu LIU Jin-Mei |
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| Institution: | 1. School of Civil Engineering & Architecture, Beijing Jiatong University, Beijing, 100044, China；2. Chinese Water resource and Hydropower Research Institute, Beijing, 100044, China；3 Office of State Flood Control and Drought Relief Head Quarters, Beijing, 100055, China |
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| Abstract: | The probability distribution type of soil strength affects the results of reliability and risk analysis of geotechnical problems. Many soil and rockfill samples have been collected from earth dams and tested in lab. The probability distributions of these soil or rockfill samples are coincident with the theoretical normal distribution or logarithmic normal distribution. The selection of logarithmic normal distribution in risk and reliability analysis can avoid the parameters to become negative, so it is more acceptable. |
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| Keywords: | soil strength probability distribution reliability embankment dam |
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