句容抽水蓄能电站工程场地稳定性及地震动效应研究

Researches on the site stability and ground motion parameters for Jurong Pumping Storage Power Station

本文结合国家重点工程———句容抽水蓄能电站工程的具体情况研究了地震地质条件、地震活动环境及断裂构造对建设抽水蓄能电站工程的影响,研究了场地的稳定性及地形地貌对场地地震动效应的影响。经二维波动有限元分析,主坝坝基处的地震动峰值加速度要比地震危险性分析给出的平坦基岩场地放大11.6%～14.5%,地形地貌对场地地震动效应的影响是存在的,但相对较小,对本工程的抗震设防影响不大。本文研究成果已在工程设计中采用,该成果对其它同类工程也有一定借鉴作用。

Based on the researches of seismic-geologic condition, seismic activity character and tectonic background for Jurong Pumping Storage Power Station, one of the main national projects, the effect of the site stability and geomorphic feature on ground motion parameters is studied in this paper. Using finite-element simulation method for two-dimensional wave, the ground motion peak acceleration for the major dam was obtained, which is magnified by 11.6～14.5% to the corresponding rock peak acceleration got by seismic hazard analysis. The effect of terrain condition on site motion is limited, and can be omitted in the seismic design for the plant. The research result is used for the plant designing, and can also be used by other such kind of projects for reference.