摘要
在桩土复合地基中,褥垫层起着动态调节桩土应力比的作用,决定着整个体系的承载能力。本文基于某高速公路北延线佛山段路基工程条件,运用Plaxis有限元软件对褥垫层进行数值模拟研究,从褥垫层的作用角度分析褥垫层厚度和弹性模量的参数变化对复合地基的影响。明确有限元计算目的和方法,介绍Plaxis程序,给出有限元计算模型的建立过程,确定有限元计算方案,从变形和应力的角度分析褥垫层厚度和弹性模量参数变化对桩土复合地基的影响。
In the pile-soil composite subgrade,the cushion dynamically adjusts the pile-soil stress ratio and determines the bearing capacity of the entire system.Based on the engineering conditions of the Foshan section of the northern extension of an Expressway,this paper intends to use the Plaxis finite element software to conduct a numerical simulation study on the cushion and analyze the influence of parameter variation of cushion thickness and elastic modulus on composite foundation from the perspective of cushion action.This article clarifies the purpose and method of finite element calculation,introduces the Plaxis program,gives the establishment process of the finite element calculation model,determines the finite element calculation scheme and analyzes the parameter variation of cushion thickness and elastic modulus on the pile-soil composite foundation from the perspective of deformation and stress.
作者
李宁
徐寿政
LI Ning;XU Shouzheng(Nanjing Urban and Transportation Planning and Design Institute Co.,Ltd.,Nanjing 210008,China;Third Engineering Co.,Ltd.,CCCC Third Aviation Bureau,Nanjing 210000,China)
出处
《路基工程》
2021年第4期158-162,共5页
Subgrade Engineering
关键词
刚性桩复合地基
褥垫层
厚度
弹性模量
数值模拟
变形
地基沉降
桩顶应力
rigid pile composite subgrade
cushion
thickness
elastic modulus
numerical simulation
deformation
foundation settlement
pile top stress