某软岩地基核电厂核岛地基变形分析研究  

Foundation Deformation of a Nuclear Island on Soft Rock

作　　者：艾鸿涛[1] AI Hongtao(Shanghai Nuclear Engineering Research and Design Institute Co.Ltd.,Shanghai 200233)

机构地区：[1]上海核工程研究设计院股份有限公司,上海200233

出　　处：《土工基础》2024年第5期792-796,共5页Soil Engineering and Foundation

摘　　要：以国内某软岩地基核电工程为例,建立核岛地基二维有限元法和三维有限元法计算分析模型,考虑了核岛地基中风化岩体中存在强风化岩体分布的不确定性以及关键岩土参数的不确定性,同时考虑了岩体层状分布对地基变形参数的影响,对核岛地基变形特征进行计算分析。获得了软岩地基核电厂核岛地基变形量及不均匀变形特征,并对计算分析方法进行了对比分析。研究表明:核岛地基最大沉降及不均匀变形均满足设计和规范要求;核岛基底下强风化岩石分布对核岛地基最大沉降的影响较小;提出的适应于软岩核岛地基变形计算分析方法,可用于后续类似工程的变形计算分析工作。A typical soft rock foundation deformation case of nuclear island in China is analyzed in this paper.Two-dimensional as well as three-dimensional finite element models of the nuclear island foundation are established.The uncertainty of the distribution of strongly weathered rock mass within moderately weathered rock mass beneath the nuclear island foundation and the uncertainty of key geotechnical parameters were considered in the numerical models.The influence of the layered rock mass distribution on deformation parameters is also considered.The foundation deformation of the nuclear island was estimated and analyzed comprehensively.The total and differential settlement of the soft rock foundation for the nuclear power plant are obtained,and the estimation and analysis methods are compared in the paper.The analysis results show that the maximum total and differential settlements of the nuclear island foundation meet the design and specification requirements.The distribution of the strongly weathered rock under the nuclear island foundation has less influence on the maximum settlement of the foundation.The proposed estimation and analysis methods for the soft rock underneath the nuclear island foundation can be used for the subsequent settlement estimation and analysis of similar projects.

关 键 词：软岩 核岛地基 地基变形 三维有限元模型 

分 类 号：TU433[建筑科学—岩土工程]