跨铁路转体施工T构下承台及群桩基础受力分析  

Analysis of Pile Cap and Pile Group Foundation Force Under T Structure of Cross-Railway Erection by Swing

作　　者：杨瑞 Yang Rui(China Railway Shanghai Design Institute Group Co.,Ltd.,Shanghai 200000,China)

机构地区：[1]中铁上海设计院集团有限公司,上海200000

出　　处：《建筑与装饰》2023年第11期133-135,共3页Construction & Decoration

摘　　要：转体桥梁承台分为上下两层,转体施工过程中,上部结构和桥墩自重等荷载通过球铰传递至下承台,球铰与下承台接触面小,下承台受力状态与常规一次性浇筑的承台受力状态差异显著。本文结合朝阳南路跨铁路转体施工T构群桩基础设计,利用有限元分析软件MIDAS建立基础分析有限元模型,分析在转体荷载作用下的下承台及群桩基础受力状态,通过与规范计算结果对比分析,提出了群桩基础的优化方案,为同类型跨铁路工程的基础设计提供参考和借鉴。The pile cap of the bridge erected by swinging method is divided into upper layer and lower layer,and during the erection by swing,the load such as the upper structure and the pier self-weight is transmitted to the lower pile cap through the spherical hinge,and the contact surface between the spherical hinge and the lower pile cap is small,and the force state of the lower pile cap is significantly different from that of the conventional one-time pouring pile cap.Combined with the design of T structure pile group foundation for cross-railway erection by swing of Chaoyang South Road,this paper uses the finite element analysis software MIDAS to establish a finite element model for foundation analysis,analyzes the force state of the lower pile cap and pile group foundation under the action of the load by swing,and puts forward an optimization scheme for the pile group foundation by comparing and analyzing the normative calculation results,which provides reference for the foundation design of the same type of cross-railway project.

关 键 词：转体施工 下承台 桩顶反力 有限元分析 

分 类 号：U44[建筑科学—桥梁与隧道工程]