永不落水库工程区地震烈度较高，地震动峰值加速度为不小于0.40g，设计中采用力学性能较好的弱风化料做为大坝填筑料；采用较缓坝坡对滑裂面压脚处理；较缓的心墙边坡和加大心墙厚度，防止地震时产生贯穿性裂缝；采用较厚下游反滤层，有效保护粘土防渗心墙；在坝顶以下下游坝坡一定范围内设置了土工格栅，降低坝顶附近在地震中出现浅层滑坡的风险，提高抗震性能。%The seismic intensity of the Yongbuluo reservoir project area is quite high and the dynamic peak seismic acceleration is not less than 0.40g, In the design of the reservoir moderately weathered material was used as dam embankment material; a gentle slope was designed for the slip fracture surface treatment; a thick core wall with a gentle slope was provided to protect it from through cracking when an earthquake happens; a thick downstreamfi lter was arranged to protect the clay core; geotechnical grid wasfi xed within a certain extent of the downstream dam slope below the dam crest to reduce the risk of causing shallow sliding near the dam crest and to improve earthquake resistance as well.
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