Jinping I high arch dam has been constructed and is in the first impoundment period. But the persistent slope deformation at the left bank is affecting the chord length of the dam. In order to guarantee safe operation of the project, we determine space deformation about chord length as prewarning index. First of all, we calculate the entropy weight of each measured point by modified entropy method. Then we give the expression of deformation entropy of single measured point based on information entropy. On the basis of this, we establish the entropy of space deformation of each measured point. At last, we use the maximum entropy theory to generate the probability density function of space deformation entropy of chord length , and determine the prewarning index of the entropy. The results indicate that this method is highly effective and practicable, and provides reference for the safe operation of dam.
Key words
entropy theory /
chord length method /
slope at left bank /
arch dam of Jinping I /
prewarning index
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References
[1] 中国电建集团成都勘测设计研究院有限公司. 雅砻江锦屏一级水电站水库初期蓄水大坝及边坡安全监测分析与评价(第三阶段蓄水)[R]. 成都:中国电建集团成都勘测设计研究院有限公司, 2014.
[2] 顾冲时, 吴中如. 大坝与坝基安全监控理论和方法及其应用[M]. 南京:河海大学出版社, 2006.
[3] SHANNON C E. A Mathematical Theory of Communication[J]. Bell System Technical Journal,1948,27(3):379-423.
[4] JAYNES E T. Information Theory and Statistical Mechanics[J]. Physical Review,1957, 106(4):620-630.
[5] 丛培江. 基于熵理论的混凝土坝裂缝分析模型研究[D]. 南京:河海大学, 2007.
[6] 伍 元. 基于熵理论的大坝安全分析评价方法研究[D]. 南京:河海大学,2010.
[7] 雷 鹏. 混凝土坝变形安全监控指标的拟定方法研究[D]. 南京:河海大学,2008.
[8] 雷 鹏, 常晓琳, 肖 锋,等. 高混凝土坝空间变形预警指标研究[J]. 中国科学: 技术科学,2009, 41(7): 992-999.
[9] 裴启涛,李海波,刘亚群,等. 基于组合赋权的岩爆倾向性预测灰评估模型及应用[J]. 岩土力学,2014, 35(1): 49-56.
[10]周惠成, 张改红, 王国利. 基于熵权的水库防洪调度多目标决策方法及应用[J]. 水利学报,2007, 38(1): 100-106.
[11]YULMETYEV R M, EMELYANOVA N A, GAFAROV F M. Dynamical Shannon Entropy and Information Tsallis Entropy in Complex Systems[J]. Physica A: Statistical Mechanics and Its Applications,2004, 314(28): 649-676.
[12]SIMOES L M C, TEMPLEMAN A B. Entropy-based Synthesis of Pretensioned Cable Net Structures[J]. Engineering Optimization, 1989, 15(2): 121-140.
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