水布垭面板堆石坝施工与运行性状反演研究

 利用水布垭大坝建设阶段堆石料的现场大型试验成果，以及施工期、蓄水运行期原型大坝的实际变形监测资料，采用免疫遗传算法反演得到堆石的邓肯E-B模型参数和增量流变模型参数；对施工期面板的脱空现象、初蓄水时和蓄水运行期大坝的结构性态进行验证分析；大坝长期运行特性的计算预测结果表明，大坝结构运行是安全的，我国200 m级面板坝的筑坝技术已日趋成熟。但是，由于水荷载作用下面板下卧堆石应力增长，使得蓄水运行期大坝上游堆石区的流变增加更为明显，导致面板出现挤压现象，需要引起重视。

BACK ANALYSIS ON CONSTRUCTION AND OPERATION PROPERTIES OF SHUIBUYA CONCRETE FACE ROCKFILL DAM

According to the rockfill large-scale field test results，as well as Shuibuya concrete face rockfill dam?s deformation monitoring data during the construction and water storage period，Duncan E-B model parameters and incremental rheological model parameters of rockfill back-analysis are decided by immune genetic algorithm method；the panel cavity phenomenon at construction period and the behavior of the dam at the beginning of water storage run-time were verified；the calculated results of the dam?s long-running characteristics are indicated that the dam is safe，and 200 m-grade CFRD construction technology has more and more matured. However，it paid attention to the panel extrusion phenomenon because the rheological value in dam?s upstream rockfill zone increased more evidently due to water pressure.