自由约束条件下能源桩的离散元研究  

DISCRETE ELEMENT STUDY OF ENERGY PILES UNDER FREE CONSTRAINTS

作　　者：王雪松[1] 龚晓南[1] WANG Xuesong;GONG Xiaonan(Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou 310012,China)

机构地区：[1]浙江大学建筑工程学院滨海中心,杭州310012

出　　处：《低温建筑技术》2022年第7期155-159,共5页Low Temperature Architecture Technology

摘　　要：为给能源桩的换热特性和承载能力特性的研究提供新思路,文中使用南京大学开发的离散元软件MatDEM,通过粒径优化方法逐层堆积离散元颗粒,建立单U型换热管的能源桩的三维传热模型,使用PHC能源桩现场实验对模型进行修正,模拟分析的桩体温度、桩周土体温度、桩身应力应变、土体位移,与现场实验结果对比结果一致,体现了单U型换热管的能源桩三维传热模型的合理性,为能源桩的离散元研究提供基础。To study heat transfer characteristics and bearing capacity characteristics of energy piles,a three-dimen⁃sional heat transfer model of the energy pile with a single U-shaped heat exchange tube by stacking discrete element particles layer by layer through the particle size optimization method was established by Matdem discrete element software developed by Nanjing University,in which the PHC energy pile field experiment is used to modify the mod⁃el.The results of pile temperature,soil temperature around the pile,pile stress and strain,and soil displacement are consistent with the field experimental results.The rationality of the three-dimensional heat transfer model of the en⁃ergy pile with a single U-shaped heat exchange tube is reflected,which provides a basis for the discrete element study of the energy pile.

关 键 词：能源桩 分层地基 离散元模拟 三维传热模型 

分 类 号：TU473[建筑科学—结构工程]