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土石坝渗透稳定可靠度分析方法研究(张士辰)

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6L6O7DL:m)@(~se0【作者】张士辰 【导师】李雷
@%x:v!m4x.~8CT s~0【作者基本信息】南京水利科学研究院,岩土工程,2004年,硕士水利论文6[o+lx `C9F-Q

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E%?[*c4I8WY0【中文摘要】 土石坝渗透稳定可靠度分析方法研究,是大坝风险分析技术深入发展的需要,其核心内容是基本变量概率特征的确定、功能函数的建立、可靠指标的计算。 本文综述了可靠度分析理论,编制了可靠指标计算程序JC.FOR;从随机性、模糊性、模糊随机性三种不确定性分类角度,分析了土石坝渗透稳定性的不确定性影响因素;对无粘性土中的粗砂进行了渗透系数、抗渗强度概率特性的试验研究;推求了渗透系数概率特性参数和孔隙率n、等效粒径d20之间的关系;依据土石坝自身渗流特点,分别基于观测资料和计算,建立了土石坝渗透稳定可靠度分析数学模型。 最后,本文对白浪河水库大坝坝后出逸段进行了垂直渗透稳定可靠度分析,探讨了两种方法一致性和可靠性。水利论文Y+nwmC!d

ey'Y"s(F `0【英文摘要】 Study on reliability analysis method in seepage stability of embankment dam is needed for deeply development of dam risk analysis technique, and its key content is confirmation of probability characteristic of basic random variable, foundation of function and calculation of reliability index.In the paper the theory of reliability has been summarized, and the program JC.FOR for calculation of reliability index has been compiled. The uncertainty factors which affect seepage stability have been analyzed on detail from randomicity, fuzziness, fuzziness and randomicity. Probability characteristic of permeability and impervious strength have been discussed on the basis of repetition experiment of sand. The relationship between permeability and equivalent grain diameter "d20" and porosity "n" has been derived. Through seepage characteristics of embankment dam, the methods of reliability analysis for embankment seepage stability bave been established by means of observed information and calcul...更多ation respectively.At last, the reliability analysis of upright seepage stability on downsteam toe of Bailang river reservoir dam has been made, and the consistency and reiability of two methods have also been discussed.  还原水利论文x,O,w$_,j2t@0k9d f

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【中文关键词】 土石坝; 渗透稳定; 可靠度; 渗透系数; 抗渗强度; 渗透坡降水利论文-P_lN:Eq"V
【英文关键词】 embankment dam; seepage stability; reliability; permeability; impervious strength; seepage gradient
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TAG: 土石 研究 张士辰 分析方法
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