软土厂址核电厂基于沉井基础的抗震分析技术研究  

Research on Seismic Analysis Technique for Nuclear Power Structures on Soil Site Based on Combined Caisson Foundation

作　　者：曹舟 马睿 蔡俊 CAO Zhou;MA Rui;CAI Jun(Nuclear Power Operations Research Institute,Shanghai.200120,China)

机构地区：[1]核电运行研究(上海)有限公司,上海200120

出　　处：《中国核电》2024年第5期720-725,741,共7页China Nuclear Power

摘　　要：国内已建和在建的商运核电厂均位于沿海基岩厂址,但随着核电选址数量的逐渐增多,适宜建设的厂址日趋减少,软土厂址将成为潜在的应用方向。基于沉井基础在核电软土厂址中的概念方案,开展了软土厂址核电厂应用沉井基础抗震分析技术的研究,建立了沉井-土-结构相互作用建模、分析和验证的方法,并同传统基坑开挖回填方案下核电构筑物的抗震分析进行对比,沉井基础方案在反应谱峰值和零周期加速度方面均呈现下降趋势,有益于核电构筑物、系统和设备的抗震设计。此外,进一步通过时域抗震分析来计算验证了软土厂址核电厂基于沉井基础的抗震分析技术的准确性。The commercial nuclear power plants that have been built or under construction in China are located in hard rock sites.But with the gradual increase in the number of nuclear power sites,the suitable sites are decreasing,and the soft soil sites will become a potential application direction.Based on the application of caisson foundation in soft soil site of nuclear power plant,the seismic analysis methodology of caisson foundation for nuclear power plant in soft soil site is studied in this paper.And modeling,analysis and verification method of caisson soil-structure interaction is established.Compared with the seismic analysis of nuclear power structures under the traditional excavation and backfill design,the response spectrum peak value and zero period acceleration of the caisson foundation show a downward trend,which is beneficial to the seismic design of nuclear power structures,systems and equipment.In addition,the time-domain seismic analysis methodology applied to the caisson foundation for nuclear power plants in soft soil sites is calculated to verify the accuracy of the frequency-domain seismic analysis technology.

关 键 词：核电 软土厂址 沉井 抗震 

分 类 号：TU352.11[建筑科学—结构工程]