地质缺陷对坝体结构影响分析模型研究

Analytic model for effect of geologic defects on dams

针对坝基及坝肩地质缺陷对大坝结构性态影响较大的问题,深入研究了地质缺陷的蠕变特性及其变化规律,据此构建了地质缺陷的法向和切向蠕变分析模型,该模型综合反映了地质缺陷的瞬时弹性变形、衰减蠕变和卸载后滞后回复变形以及不可恢复的蠕变变形。工程实例表明,所建立的地质缺陷的蠕变分析模型能较好地反映地质缺陷对大坝结构性态的影响。

Aiming at the effect of geologic defects on dam foundation and abutment, the creep character of geologic defects and its variation rules are thoroughly studied. Base on such a basis, a normal and tangential creep deformation model is established. The model reflects the instant elastic deformation, attenuation creep, lagged recoverable deformation and un-recoverable creep deformation of the geologic defects. Engineering cases have indicated that the present creep analytic model perfectly reflects the effects of geologic defects on dam characters.