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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 problem that the geological defects of the dam foundation and the dam abutment greatly affect the dam structure, the creep characteristics and the variation regularity of the geological defects are deeply studied. Based on this, the normal and tangential creep analysis models of the geological defects are constructed, The model comprehensively reflects the instantaneous elastic deformation, the attenuation creep and the hysteresis recovery deformation and the unrecoverable creep deformation of the geological defects. The engineering examples show that the established creep analysis model of geological defects can better reflect the effect of geological defects on the structural behavior of the dam.