在水利水电工程建设中,岩石坝基的岩性一般都不均一,并且常被断层、夹层、节理、裂隙等结构面所切割,构造十分复杂.因此,坝基岩体一般是非均质非连续体,其应力应变关系是非线性的,并且在趋近屈服应力时,往往还有塑性变形发生.用线弹性分析复杂坝基必将引起较大误差,计算所得的位移将偏小.因此,必须进行非线性分析.我们针对宝珠寺水电站混凝土重力坝的岩性不均一、并有多条夹层、断层等软弱结 In the construction of water resources and hydropower projects, the lithology of rock dam foundation is generally not uniform, and is often cut by the structural planes such as faults, mezzanines, joints and fissures, so the structure of the dam foundation is very complex, so the dam foundation rock is generally heterogeneous discontinuity, The stress-strain relationship is nonlinear, and plastic deformation often occurs when approaching the yield stress. The analysis of complex dam foundation using linear elasticity will cause a large error and the calculated displacement will be small. Therefore, it is necessary to conduct nonlinear Analysis.We aim at the Baozhusi Hydropower Station concrete gravity dam of uneven lithology, and a number of mezzanine, fault and other weak knot