西北水电Issue(3)：1-9,9.DOI:10.3969/j.issn.1006-2610.2025.03.001
黄河玛尔挡水电站地质构造分析及地震安全性评价研究
Geological Structure Analysis and Seismic Safety Evaluation of the Maerdang Hydropower Station on the Yellow River
摘要
Abstract
To evaluate the impact of earthquakes on the construction and safety of the Maerdang Hydropower Station,this study analyzes the seismic hazard in the near-field area by investigating the seismic tectonic environment and seismic activity.Based on this,engineer-ing site design ground motion parameters,including peak ground acceleration(PGA),seismic design response spectra,and bedrock ac-celeration time-history,are determined through calculations.The results show that the dam site of Ma'erdang is located within the Qaid-am-Altyn seismic belt,and the site seismic hazard is mainly affected by moderate-to-near-field strong earthquakes.The basic seismic intensity is GradeⅦ,with the potential seismic source areas of Zhongtie(M7.0),Maqin(M8.0),Maqin-Maqu(M7.5),and Awan Cang(M7.5)exerting the greatest influence on the dam site.The bedrock PGAs with a 10%、5%exceedance probability in 50 years,and 2%、1%exceedance probability in 100 years are 149、205、357 gal and 435 gal,respectively.Under seismic conditions,seismic geological hazards mainly manifest as rockfalls,while landslides,collapses,and unloading bodies do not directly affect the dam site area.The research findings provide data support for the seismic design of the Maerdang Hydropower Station and reference for seismic safety e-valuations of other hydropower stations.关键词
玛尔挡水电站/地震危险性分析/地震动参数/安全性评价Key words
Ma'erdang Hydropower Station/seismic hazard analysis/ground motion parameters/safety evaluation分类
天文与地球科学引用本文复制引用
李瑞卿,王志通,付建伟,林佳明,吕悦军..黄河玛尔挡水电站地质构造分析及地震安全性评价研究[J].西北水电,2025,(3):1-9,9.基金项目
国家重点研发计划项目(2017YFC1500402) （2017YFC1500402）
