大面积堆载下软土区桥梁桩基础变形特性研究
Study on Deformation Characteristics of Bridge Pile Foundation in Soft Soil Area under Large Pile Load
陈志超1
作者信息
- 1. 惠州市道路桥梁勘察设计院,广东 惠州 516000
- 折叠
摘要
文中就大面积堆载条件下桩基内部应力及应变的时程特性展开研究.结果表明,桥墩的横向位移时程响应曲线稳定阶段模拟的承台位移达到 31.6 mm,比实测值高 6.9%,但模拟结果与实测曲线变化趋势存在一致性.距离堆载越近,其桩基础的变形越大,桩基础的受力越小.对于所有桩表面位置,桩身位移随时间的增加而不断增加,224 d的桩身位移比 3 d的桩身位移高66.7%.随着埋深增加,近距离桩桩身弯矩呈现先反向降低、后正向增加、后降低再增加的趋势,远距离桩身弯矩呈现先正向降低、后反向增加、后降低的趋势.
Abstract
In this paper,the time-history characteristics of internal stress and strain of pile foundation under large area loading are studied.The results show that the simulated cap displacement reaches 31.6 mm in the stable phase of the lateral displacement response curve,which is 6.9%higher than the measured value,but the simulated results are consistent with the measured curve.The closer the pile load is,the greater the deformation of pile foundation and the smaller the force of pile foundation.For all pile surface positions,the pile displacement increases with time,and the 224 d pile displacement increases by 66.7%compared with the 3 d pile displacement.With the increase of buried depth,the bending moment of the pile body in the near distance shows a trend of first reverse decrease,then positive increase,then lower and then increase,while the bending moment of the pile body in the far distance shows a trend of first positive decrease,then reverse increase,and then lower.
关键词
桥梁工程/大面积堆载/桩基础/变形特性Key words
Bridge engineering/Large area stowage/Pile foundation/Deformation characteristic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