基于Bayes融合理论的某坝段帷幕体防渗效果评价  

Anti-seepage evaluation of dam foundation curtain based on Bayes data fusion theory

作　　者：彭鹏[1] 宋汉周[1] 徐建光[2] 郭张军[2] 

机构地区：[1]河海大学地球科学与工程系,南京210098 [2]陕西电力科学研究院水电技术研究所,西安710054

出　　处：《岩土力学》2010年第9期2889-2893,2900,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.50139030)资助

摘　　要：坝基帷幕体的防渗性能及其时效可由传感器采集到的地下水宏观动态反映出来,而在异类多个传感器数据融合的过程中,常常出现各个评价指标不一致的现象。为消除这种现象,采用Bayes融合方法,首先验证各个传感器的可靠程度,确立正确的关系矩阵,然后将各传感器的可靠程度模糊化,进而给出各传感器的综合支持程度指标,最后给出融合结果。将其应用于某坝13坝段帷幕体防渗效果分析,结果较为符合规律。经分析知,2003-2008年间帷幕体防渗效果呈现了阶段性衰减,其中2005年和2008年为该坝段帷幕体防渗性能的相对明显衰减时期。建议加强监测,为必要时采取工程措施提供依据。The macroscopic regimes under dam,which collected by sensor could reflect anti-seepage effect and its time-variance of dam foundation curtain,but in the procedure of multi-sensor data fusion,some evaluation indices were inconsistent.In order to eliminate this phenomenon,Bayes data fusion theory was utilized;the reliability of each sensor must be calculated before establishing the correct relation matrix.The fuzzy reliability of sensor was given by the statistical method.Based on the fuzzy index,the data fusion of multi-sensor was obtained;analysis of groundwater macroscopic regime under a dam section was carried out by using a decision-making fusion method.As a result,The macroscopic regimes under dam section 13 had the tendency of increasing with time between 2003 and 2008.The anti-seepage performance of the dam foundation curtain was to be weakened locally.

关 键 词：多传感器 数据融合 Bayes理论 防渗耐久性 

分 类 号：TU443[建筑科学—岩土工程]