摘要
运用数值分析法创建了三维有限元模型,通过调整桩基与隧道的相对位置、隧道埋设深度、水平净距、桩基本体半径等方式,更加科学合理地探讨静压桩基施工给既有地铁隧道带来的影响。统计结果发现,对桩基侧面施工操作时会使隧道局部形体出现较大的改变,并且伴随桩身与隧道水平净距数值的增加,在传递过程中变形量值呈现出渐进式衰减态势,扰动因素给浅埋隧道带来了较显著的影响,实际工程中出现了较大的形变;桩基半径扩增同样会使隧道结构变形问题更加严重。
A three-dimensional finite element model was created by using numerical analysis method.By adjusting the relative position of pile and tunnel,the burial depth oftunnel,the horizontal clearance,and theradius ofpilefoundation,the impact ofstatic pressure pilefoundation construction on the existing subway tunnel was discussed more scientifically and reasonably.The statistical results show that the local shape of the tunnel will be greatly changed during the construction ofthe side ofthe pile foundation,and with the increase ofthe horizontal clear distance between the pile body and the tunnel,the deformation value will show a gradual attenuation trend during the transmission process,and the disturbance factors will have a significant impact on the shallow tunnel,and a large deformation will occur in practice;The expansion of pile foundation radius will also make the tunnel structure deformation more serious.
作者
罗晓生
黄全兵
刘振
蒋晓亚
夏聪
LUO Xiao-sheng;HUANG Quan-bing;LIU Zhen;JIANG Xiao-ya;XIA Cong(China Construction Second Engineering Bureau First Construction Engineering Co.Ltd.,Foshan 528000,China)
出处
《工程建设与设计》
2023年第21期78-81,共4页
Construction & Design for Engineering
关键词
桩基施工
盾构隧道
隧道变形
有限元分析
)pile foundation construction
shield tunnel
tunnel deformation
finite element analysis
