软土区路基填筑对邻近桥台排桩侧推效应分析  

Analysis of Lateral Pushing Effect of Roadbed Filling in Soft Soil Area on Adjacent Bridge Abutment Row Piles

作　　者：王卫强 张浩[2] Wang Weiqiang;Zhang Hao(JSTI Group,Nanjing 210017,China;Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]苏交科集团股份有限公司,南京市210017 [2]郑州大学,郑州市450000

出　　处：《北方交通》2023年第11期31-36,共6页Northern Communications

基　　金：国家自然科学基金项目(51608490);高速铁路建造技术国家工程研究中心开放基金项目(HSR202102)。

摘　　要：结合南京某新通道穿湖段桥台偏移事故工程,对软土区桥台排桩的被动受荷效应进行了分析。基于塑性变形理论,综合考虑填土堆载影响和桥台双排桩受荷特点,构建了侧移软土与桥台双排桩相互作用的动态开展模型,给出了侧移土对桩身推挤作用的计算方法;并采用桩身离散和矩阵传递法给出了桥台双排桩受力响应的计算方法。工程实例验证了计算方法的可行性,可为软土区桥台排桩的设计计算提供参考。In combination with the accident of bridge abutment deviation in a new channel crossing a lake in Nanjing,the passive loading effect of bridge abutment row piles in soft soil area is analyzed.Based on the theory of plastic deformation,taking into account the influence of soil filling and loading and the loading characteristics of double row piles on the bridge abutment comprehensively,the dynamic development model for the interaction between lateral sway soft soil and double row piles on the bridge abutment is established,and the calculation method for the pushing and squeezing effect of lateral sway soil on the pile body is given;and the calculation method for the stress response of double row piles on the bridge abutment is provided by using the pile body discretization and matrix transfer method.The feasibility of the calculation method is verified by the engineering project,so as to provide reference for the design and calculation of bridge abutment row piles in soft soil area.

关 键 词：桥台桩基 排桩 软土区 侧推效应 工程实例 

分 类 号：TU471[建筑科学—结构工程]