公伯峡面板堆石坝堆石流变特性反演分析  

Back analysis of rheological deformation characteristics of Gongboxia Concrete-Faced Rockfill Dam

作　　者：孔维耀[1] 王子健[1] 王玉洁[2] 朱锦杰[2] 王柳江[1] 刘斯宏[1] 张学峰[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]国家电力监管委员会大坝安全监察中心,浙江杭州310014

出　　处：《水利水电科技进展》2013年第5期26-30,46,共6页Advances in Science and Technology of Water Resources

基　　金：江苏高校优势学科建设工程(YS11001)

摘　　要：为了分析堆石流变特性及其对公伯峡混凝土面板应力变形的影响,利用原位观测资料对公伯峡面板堆石坝的变形性态进行分析,采用Merchant黏弹性流变模型,反演计算得到相应的流变参数,并用反演得到的流变参数对大坝受力变形进行计算分析。结果表明:堆石的流变作用较明显,流变期间沉降计算值与实测值的变化规律较吻合,堆石流变对面板应力变形、垂直缝和周边缝变形有较大影响;所采用的流变模型和反演得到的流变参数较合理,能够预测面板坝轴向应力和裂缝的发展趋势。In order to study the rheology of rockfills and its influence on the stress and deformation of the concrete face,the monitoring deformation data of the Gongboxia Concrete-Faced Rockfill Dam was analyzed.The viscoelastic rheological model Merchant was applied to determine the relevant rheological parameters of the rockfills by back analysis.The stress and deformation of the dam during the operation were calculated using the obtained rheological parameters.The results show that the rheology of rockfills is relatively obvious and the computed results agree well with the measured values.The rheology of rockfills has great impact on the stress and deformation of concrete faces,vertical joints and peripheral joints.The rheological model and parameters obtained by back analysis are reasonable,and can be used to predict the development of axial stress and the cracks occurring trend in the concrete face.

关 键 词：面板堆石坝 变形性态 堆石流变 反演分析 裂缝 公伯峡水电站 

分 类 号：TV641.43[水利工程—水利水电工程]