考虑桩土作用的群桩效应分析  

ANALYSIS OF PILE GROUP EFFECT CONSIDERING THE PILE-SOIL INTERACTION

作　　者：马兴键 MA Xingjian(Tianjin Municipal Engineering Design and Research Institute Co.,Ltd.,Shenzhen Branch,Shenzhen 518053,China)

机构地区：[1]天津市政工程设计研究总院有限公司深圳分公司,深圳518053

出　　处：《低温建筑技术》2022年第4期137-141,共5页Low Temperature Architecture Technology

摘　　要：桩土接触变形为非线性问题,相互作用机理复杂。为了分析高桩承台群桩基础的桩土作用,文中用Drucker-Prager弹塑性模型模拟土体的材料非线性,建立高承台群桩-土体的有限元非线性数值模型,分析并总结了不同参数对群桩受力的影响,其中桩长径比和桩距径比对群桩效应影响较大。可供群桩基础设计提供参考。The pile-soil contact deformation is a nonlinear problem,in which the interaction mechanism is complex.In order to analyze the pile-soil interaction of pile group foundation with high cap,the Drucker Prager elastic-plastic model is used to simulate the material nonlinearity of soil,and the finite element nonlinear numerical model of pile group soil with high cap is established.The effects of different parameters on the stress of pile group are analyzed and summarized,among which the pile length-diameter ratio and pile spacing-diameter ratio have a great influence on the pile group effect.It can provide the reference for the design of pile group foundations.

关 键 词：桩土作用 群桩效应 DP模型 有限元分析 

分 类 号：TU473.1[建筑科学—结构工程]