【摘要】 文中以某水库黏土心墙土石坝为研究对象，开展筑坝过程中坝体及坝基的应力变形研究，采用邓肯-张E-B模型、E-v模型和摩尔库伦模型对比分析大坝蓄水工况和施工工况下的水平位移、竖向位移、大小主应力等结果。结果表明，邓肯-张两种模型下大小主应力的分布和数值以及水平位移规律基本一致，应力极值均在坝底中部约偏上游侧；竖向位移的最大值均发生在坝体中心偏上2/3坝高左右。摩尔库伦模型的大小主应力最大值与邓肯模型计算结果较为接近，但水平和竖向位移最大值与邓肯-张两种模型结果相差约20倍，因此利用摩尔库伦模型计算土石坝应力应变是不现实的。更多还原

【Abstract】 Taking the earth-rock dam with clay core wall of a reservoir as the research object, the stress and deformation of the dam body and foundation during dam construction were studied.Duncan-zhang E-B model, E-v model and molar Coulomb model were used to compare and analyze the horizontal displacement, vertical displacement and major and minor principal stress of the dam under storage conditions and construction conditions. The results show that the horizontal displacement law and the distribution and value of principal stress are basically the same in the Duncan-Zhang two models, and the extreme stress is about upstream side of the middle of the dam bottom. The maximum vertical displacement occurs about 2/3 dam height above the center of the dam body. The maximum value of principal stress of the Mohl Coulomb model is close to that of Duncan model, but the maximum value of horizontal and vertical displacement is about 20 times different from that of Duncan-Zhang model. Therefore, it is unrealistic to calculate the stress-strain of earth-rock dam by Mohl Coulomb model.更多还原