中文摘要：

以北槎垅水库土石坝除险加固工程为实例,综合考虑了大坝渗流场和应力场的耦合效应以及混凝土防渗心墙与土体之间的接触效应,建立了土石坝防渗心墙弹塑性有限元模型,分别对防渗心墙不同厚度、不同位置以及不同材料参数下的有限元模型进行了应力变形分析,分析了防渗心墙厚度、坝体中的位置以及材料参数变化对坝体及防渗墙应力变形的影响,最后对防渗心墙几何及材料参数的合理取值进行了分析。

英文摘要：

By using the earth dam reinforcement project of Beichalong Reservoir as an example,the elastic-plasticity FEM of impervious core earth dam is built,and the couple effect of seepage field and stress field and the contact effect between the impervious core and the soil body is also considered.The impervious core deformation and stress are calculated based on different thicknesses,positions and material parameters of the impervious core.Then,the effect of stress and deformation on the impervious core of earth dams with different geometric and material parameters is analyzed,and proper geometric and material parameters are proposed.