| 双河拱坝开裂的反分析数值模拟 |
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| 引用本文： | 林鹏,陈欣,周维垣,杨若琼,王仁坤.双河拱坝开裂的反分析数值模拟[J].岩土力学,2003(Z2). |
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| 作者姓名： | 林鹏 陈欣 周维垣 杨若琼 王仁坤 |
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| 作者单位： | 清华大学水利水电工程系 北京100084
(林鹏，陈欣，周维垣，杨若琼)，成都勘测设计研究院 四川成都610041(王仁坤) |
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| 基金项目： | 中国博士后基金资助项目，国家973项目资助(编号:2002CB412708)。 |
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| 摘 要： | 通过对垫江双河拱坝的开裂原因的初步分析,建立了地基与大坝的三维网格模型,运用自己开发的TFINE计算程序,对拱坝不同高程的地基做了不同工况条件的敏感分析计算。得出如下结论:大坝的自重和坝中上高程地基减弱是造成拱坝下游面最初发生纵向裂纹的主要原因;水压和泥沙的压力能增大下游面的受压,并减少下游面第二主拉应力的产生,如减少水荷载,则下游坝面仍能在自重作用下出现裂纹。
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| 关 键 词： | 开裂 地基敏感性 反分析 |
Simulation on back analysis of Shuanghe arch dam cracking |
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| LIN Peng,CHEN Xin,ZHOU Wei-yuan,YANG Ruo-qiong,WANG Ren-kun.Simulation on back analysis of Shuanghe arch dam cracking[J].Rock and Soil Mechanics,2003(Z2). |
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| Authors: | LIN Peng CHEN Xin ZHOU Wei-yuan YANG Ruo-qiong WANG Ren-kun |
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| Institution: | LIN Peng1,CHEN Xin1,ZHOU Wei-yuan1,YANG Ruo-qiong1,WANG Ren-kun2 |
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| Abstract: | This paper aims to qualitatively analyze the mechanics of vertical crack opening along the downstream wall of Shuanghe arch dam after two years of operation. In this study, a three dimensional code, TFINE, was employed to investigate the foundation sensitive on cracking of downstream wall under two types of loading case. The results shown that: weight and weak foundation close to middle-upper dam lead the vertical cracks to propagate along the downstream wall; pressure of water and sand promotes compression to increase, and tensile to decrease in downstream wall; with decreasing of water pressure, the vertical cracks of downstream wall would be propagated again. |
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| Keywords: | cracking foundation sensitive back analysis |
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