锦屏一级高拱坝施工期及蓄水期弦长监控指标拟定研究  

Study of Chord Length Monitoring Index of Jinping I-level High Arch Dam during Construction and Water Storage Period

作　　者：李翔宇[1] 李傲[1] 

机构地区：[1]重庆水利电力职业技术学院,重庆402160

出　　处：《水电能源科学》2015年第6期76-79,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51209077;51139001);新世纪优秀人才支持计划资助(NCET-11-0628);高等学校博士学科点专项科研基金(20120094110005);中央高校基本科研业务费项目(2012B07214)

摘　　要：锦屏一级高拱坝左岸边坡将长期处于变形阶段,这对坝体弦长变形有一定影响。为使工程安全运行,首先引入小波去噪理论对弦长原始观测数据进行去噪处理,然后运用最大熵理论并引入拉格朗日函数推导了弦长的概率密度函数,最后由失效概率给出了弦长的监控指标拟定值。结果表明,本文方法高效可行。The left bank slope of Jinping I-level high arch dam will be at the deformation stage for a long time. So, it has great influence on the chord length of the dam body. In order to guarantee safe operation of the engineering, wavelet analysis theory is proposed to carry out de-noising processing of the original monitoring data. And then the maximum en- tropy and Lagrange function are used to derive the probability density function of chord length monitoring data. Finally, the safety monitoring index of the chord length is obtained by the failure probability. The results indicate that the pro- posed method is highly effective and practicable.

关 键 词：锦屏一级高拱坝 弦长 监控指标 小波分析 最大熵理论 

分 类 号：TV698.1[水利工程—水利水电工程]