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高面板坝坝体流变性状研究(米占宽)

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6mnbm-G`0面板坝体流变性状研究

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【作者】米占宽 【导师】沈珠江; 李国英
_R#dV V }3a.W^_6w0【作者基本信息】南京水利科学研究院,岩土工程,2001年,硕士

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v:TZly_r0【中文摘要】 本文分析研究了堆石体的流变变形和湿化变形特性及其对混凝土面板堆石坝坝体变形的影响。 (1)本文首先回顾了混凝土面板堆石坝的发展及其研究现状,提出了当前理论分析存在的问题。 (2)较为系统深入地研究和讨论了堆石体的变形和强度特性及其本构关系。 (3)开展了堆石料的流变变形试验研究,研究讨论了堆石体的流变机理及其流变计算模型。 (4)开展了堆石料的湿化变形试验研究,并讨论了堆石体湿化变形的计算方法。 (5)根据堆石流变试验所得的流变模型参数,对拟建的公伯峡电站混凝土面板堆石坝进行了计入堆石流变因素与否的坝体变形特性研究,验证了流变模型及流变参数的可靠性,为准确地预测混凝土面板堆石坝的大坝原型特性提供了较为可靠的数值分析方法。 (6)根据灰岩湿陷变形试验研究结果,针对天生桥一级水电站混凝土面板堆石坝,分析了考虑坝料湿陷变形与否的面板变形问题。据此指出坝料的湿陷变形也是影响坝体后期变形的重要因素,在面板坝设计、施工时应引起足够重视。水利论文5R-\$X1C}:]"O S {

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【英文摘要】 This paper discusses and analyzes the rockfihl rheological and wetting deformation characteristics and there effects on the deformation of dam body in Concrete Face Rockfihl Dam(CFRD). (1) First, this paper reviews the development of CFRD and its studying actuality, the existing problems in the theoretical research of CFRD nowadays are brought forward. (2) Rockfihl deformation and strength characteristics and its constitutive relation are systemically and deeply studied. (3)The rockfill creep experiments have been processed and its constitutive model based on analyzing rockfill basic principle is proposed. (4) The experiment of rockfihl wetting deformation has been carried through and its numerical methods are discussed. (5) Based on the parameters obtained from the rockfihl creep experiments, the deformation characteristics of dam body in Gongbuxia CFRD which will be built is studied by contrast considering the rockfihl creep deformation with not considering it. The rationality of its...更多 creep model and the reliability of its creep parameters are verified. So a relatively reliable numerical analysis method is proposed to accurately predict CFRD抯 deformation characteristics. (6) Based on the experiment of limestone’s wetting deformation, the displacement of the concrete membrane in Tianshengqiao CFRD is analyzed. A conclusion that the wetting deformation that is very important in the evening deformation of dam body should be paid greatly emphasis on the design and construction in CFRD is drawn.  还原

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E0k;`:I$|H \0【中文关键词】 混凝土面板堆石坝; 堆石体; 本构模型; 流变; 流变模型; 湿化变形水利论文I9x*P'k8} ^q0eX
【英文关键词】 CFRD; Rockfill material; Constitutive model; Rheology; Creep model; Wetting deformation水利论文^@A*Q)qe n$c3B

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TAG: 坝体 性状 米占宽 面板 流变
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