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以建于深覆盖层上的梅溪水库混凝土面板堆石坝最大断面为试验断面，采用离心模型试验研究了三种不同趾极长度方案下防渗墙和面板的应力变形特性，探讨了趾极长度对防渗墙和面板应力变形性状的影响，提出了最优趾板长度范围．通过研究，揭示了防渗墙和面板的应力变形规律，为覆盖层上混凝土面板堆石坝的设计提供了科学的依据．
Taking the maximum section of Meixi Reservoir concrete face rockfill dam built on the deep overburden as the test section, the stress-deformation characteristics of the anti-seepage wall and the panel under three different toe lengths were studied by means of centrifugal model test. Length of the cut-off wall and the panel stress-strain characteristics, the optimal plinth length range. Through the research, the law of stress and deformation of cutoff walls and panels is revealed, which provides a scientific basis for the design of concrete faced rockfill dam on the covering layer.