桥梁群桩基础沉降的数值分析  

Numerical Analysis of the Settlement of Bridge Pile Foundation

作　　者：王瑞 

机构地区：[1]河南省交通规划勘察设计院有限责任公司,河南郑州450052 [2]河南省交院工程检测加固有限公司,河南郑州450052

出　　处：《公路工程》2014年第2期227-231,共5页Highway Engineering

摘　　要：在桥梁工程中,较大的基础沉降不仅改变桥面线形,严重的还将改变结构受力状况,降低结构的安全度。针对桥梁桩基础问题的不确定性和复杂性,采用空间有限元软件建立了桩土耦合作用的分析模型,并使用并行计算策略提高计算效率,通过实际工程分析了上部荷载、填土高度、桩长、桩径对桩基础沉降的影响,建议对处于软弱土层中的大型桥梁桩基础沉降问题有必要进行三维有限元数值分析,以确保结构的安全。Foundation settlement plays dominant role in bridge engineering and should not be ig-nored.Large settlement of bridge foundation can change the alignment of bridge deck as well as the stress state of bridge,and will reduce the structural safety margin.Considering the uncertainty and complexity of this problem,soil-pile interaction model is built by 3D finite element software to study the character-istic of pile group foundation settlement,and parallel computing method is adopted to improve the compu-tational efficiency.The impacts of upper load,depth of fill and length and diameter of pile on foundation settlement are investigated by actual engineering in the presented paper.

关 键 词：基础沉降 桩土耦合作用 空间有限元 并行计算 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]