将力学模型引入大坝安全监测领域 ,结合变形监测资料 ,提出利用三维粘弹塑性大变形理论拟定混凝土坝三级监控指标的原理和方法 ,并拟定了龙羊峡大坝变形三级监控指标 ,取得了安全监控大坝的实效 . The mechanical model is introduced into the field of dam safety monitoring. Based on the deformation monitoring data, the principle and method of using the three-dimensional viscoelastic plastic deformation theory to develop the three-level monitoring index of concrete dam are proposed. The monitoring indicators of the deformation of Longyangxia Dam are formulated, Achieved the effectiveness of safety monitoring dam.