核电厂取水头部结构在软土置换地基上的变形研究  

Deformation of Water-Intake Head of Nuclear Power Plant Built on Soft-Soil Replaced Foundation

作　　者：吴辰 李沐时 Wu Chen;Li Mushi(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou Guangdong 510230,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510230

出　　处：《港口航道与近海工程》2024年第2期40-44,共5页Port,Waterway and Offshore Engineering

摘　　要：本文以国内某核电厂取水头部结构为研究对象,基于PLAXIS 3D建立三维有限元模型,研究在不同含泥量的软土置换地基条件下,取水头部增设桩基基础对结构位移的影响。通过计算结果分析可知,随着软土置换地基含泥量的增加,结构位移有增大趋势,在取水头部下方设置桩基基础后,结构位移尤其竖向位移有显著的减小,且软土置换地基含泥量的变化对结构位移影响很小,有效提高了结构的稳定性以及核电厂取水的安全性,该结论可为类似条件下的核电厂取水头部结构设计提供借鉴。Based on Water-intake head of a nuclear power plant in China,a PLAXIS 3D finite element model is established to investigate the effect on structure displacement by adding pile foundation under water-intake head subject to soft soil replaced foundation with different sediment content.The analysis of the calculation results shows that the structure displacement tends to increase with the increment of sediment content in the soft soil replaced foundation.The structure displacement,especially vertical displacement significantly decreases by arranging pile foundation under the water-intake head.In addition,the change in sediment content has little effect on the structure displacement of soft soil replaced foundation,which effectively stabilizes the structure and ensures safe water-intake of the nuclear power plant.This research can provide a reference for the design of water-intake head structure of nuclear power plants under similar condition.

关 键 词：取水头部 软土置换 含泥量 桩基 三维有限元 结构位移 

分 类 号：TV223.21[水利工程—水工结构工程]