摘要
本文利用ABAQUS有限元软件,对天然筏板基础、常规端承型桩筏基础以及两阶段变刚度桩筏基础三种基础形式进行模拟。通过对比分析桩土荷载分担比、桩侧摩阻力以及三种基础筏板下地基土的沉降,研究三种筏板基础的工作特性,探讨并总结两阶段变刚度桩筏基础的工作机理。分析结果显示,两阶段变刚度桩筏基础工作机理介于天然筏板基础与复合桩筏基础之间,具有较明显的两阶段受力特性,能够充分发挥地基土的承载力,有效提高桩与土的共同承载能力。
In this paper,the FEM software ABAQUS is used to analysis the pile-soil load share ratio,load share ratio of pile side friction and soil subsidence,including natural raft foundation,end bearing pile foundation and two-phase varying stiffness piled raft foundation.Based on the research of the working characteristics of pile and soil,it highlights the good working mechanism of two-phase varying stiffness piled raft foundation. The analysis results show that two-phase varying stiffness piled raft foundation,with obvious two phase stress characteristics,has a working principle between natural raft foundation and the composite raft foundation,fully making use of the bearing capacity of foundation soil,effectively improving the joint bearing capacity of piles and soil.
出处
《福建建设科技》
2014年第5期1-4,共4页
Fujian Construction Science & Technology
关键词
两阶段
变刚度
桩筏基础
桩土共同作用
two-phase
varying stiffness
piled raft foundation
pile-soil interaction
作者简介
林树枝,男,福建厦门人,1963年5月出生,工学博士、教授级高工、博士生导师,总工程师.
