大直径群桩基础承载特性现场试验与数值模拟分析
Field Test and Numerical Simulation Analysis of Bearing Characteristics of Large Diameter Pile Group Foundation
汤名雨1
作者信息
- 1. 中国建筑材料工业地质勘查中心江西总队,江西 上饶 334000
- 折叠
摘要
文中结合某大跨径桥梁工程,采用现场试验与数值模拟相结合的方法,对大直径群桩基础的承载特性进行了研究.研究表明,桩的直径从2.5m增加至3.0m时,桩基承载能力可提升9.58%,增加桩长同样能有效提高桩基的承载能力;群桩基础承载特性的相关系数均为0.95 以上;随着群桩桩数的增加,群桩的极限承载力明显上升,群桩效应系数在不断下降,说明群桩效应越发明显,群桩的利用率越低.
Abstract
In this paper,the bearing characteristics of large-diameter pile group foundation were studied by combining field test and numerical simulation with a long-span bridge project.The research shows that when the diameter of pile is increased from 2.5 m to 3.0 m,the bearing capacity of pile foundation can be increased by 9.58%,and the bearing capacity of pile foundation can be effectively improved by increasing the pile length.The correlation coefficients of load bearing characteristics of pile group foundation are above 0.95.With the increase of pile group number,the ultimate bearing capacity of pile group increases obviously,and the effect coefficient of pile group decreases continuously,which indicates that the effect of pile group becomes more and more obvious,and the utilization rate of pile group is reduced.
关键词
群桩基础/承载力试验/承载特性/数值模拟Key words
Pile group foundation/Bearing capacity experiment/Bearing characteristics/Numerical simulation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据