摘要
以某地区地表堆载临近桥梁群桩桩基为例,采用有限元软件ABAQUS建立数值模型,重点分析了堆载对桩体的位移、轴力和桩侧摩阻力的影响,得到以下结论:堆载作用下,周围土体发生明显的沉降,加上桩土之间的相互作用,会对桩基的安全产生不利影响;角桩和边桩承担大部分桩顶荷载,中心桩分担的荷载比较小,堆载对中心桩轴力影响最小;从侧摩阻力方面来说,堆载对角桩侧影响最大,边桩次之,对中心桩影响最小;从桩身沉降方面来说,单侧堆载使得靠近堆载侧的桩顶竖向沉降最大,远离堆载侧的桩顶竖向沉降最小,且堆载对角桩的整体影响最大,边桩次之,中心桩最小。
Taking the pile foundation of the adjacent bridge pile groups with surface surcharge in a certain area as an example,the finite element software ABAQUS is used to establish a numerical model,so as to focus on the analysis of the impact of surcharge on the pile displacement,axial force and pile side friction of pile body.The following conclusions are obtained:under the action of surcharge,the surrounding soil mass has obvious settlement,and the interaction between pile and soil will have adverse effects on the safety of pile foundation;corner pile and edge pile bear most of the pile top load,and the load shared by the central pile is relatively small,and the surcharge has the least impact on the axial force of the central pile;in terms of side friction,the surcharge has the largest impact on the side of the corner pile,followed by the side pile,and the impact on the central pile is the smallest;in terms of pile body settlement,the single side surcharge makes the pile top vertical settlement near the surcharge side the largest,and that far away from the surcharge side the smallest,and the overall impact of surcharge on the corner pile is the largest,followed by the side pile,and the impact on the central pile is the smallest.
作者
冯超
赵鹏
Feng Chao;Zhao Peng(Xinjiang Uygur Autonomous Region Institute of Traffic Planning,Survey and Design,Urumqi 830000,China)
出处
《北方交通》
2021年第5期35-38,共4页
Northern Communications
关键词
桥梁
群桩
地表堆载
受力
位移
数值分析
Bridge
Pile group
Surface surcharge
Stress
Displacement
Numerical analysis
