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本文分考虑与不考虑水库诱发地震两种情况进行地震危险性分析,收集了以观音阁水库大坝坝址为中心,半径为300多千米范围内的地震地质资料,进行了潜在震源的划分、地震活动性参数的确定、地震动参数衰减规律的选取和地震危险性分析计算等工作.最后,以基岩自由地面期望的水平峰值加速度的危险曲线的形式给出了计算结果,在考虑不确定性校正和水库诱发地震影响的基础上,对大坝抗震设防加速度提出了建议.
In this paper, the seismic hazard analysis with and without considering reservoir-induced earthquakes is carried out. Seismic geological data with the radius of more than 300 km centered on the dam site of Guanyinge Reservoir are collected and potential hypocenters are classified , The determination of seismicity parameters, the selection of attenuation law of seismic motion parameters and the analysis and calculation of seismic hazard.Finally, the calculation results are given in the form of hazard curve of horizontal peak acceleration expected from free ground of bedrock, Based on the above results, deterministic correction and reservoir-induced earthquake impact, some suggestions are proposed for the acceleration of the dam.