桥梁桩基施工诱发振动对临近建筑物的影响分析  

Safety Evaluation of the Pile Foundation Vibration of the New Bridge on the Adjacent Buildings

作　　者：刘小林 LIU Xiaolin(South China University of Technology Guangzhou 510641,China;Zhuhai Da Heng Qin Company Limited Zhuhai 519000,China)

机构地区：[1]华南理工大学,广州510641 [2]珠海大横琴股份有限公司,广东珠海519000

出　　处：《广东土木与建筑》2023年第10期84-86,105,共4页Guangdong Architecture Civil Engineering

基　　金：珠海大横琴股份有限公司资助项目(SGO1-2018-458B)。

摘　　要：为评估桥梁桩基施工振动对临近建筑物的影响,采用有限元分析软件ANSYS/LS-DYNA建立了土层-建筑物耦合三维模型,考虑建筑物完好和受损伤两种工况下,桩基施工诱发的冲击振动对建筑物周边土层的影响。结果表明,桩基施工振动会引起周围土体的沉降变形,由于冲击效应的影响,周边土体的振动位移呈上下起伏趋势,临近建筑物受到冲击效应影响时,建筑物立柱根部受力大。两种工况下的土体位移和结构构件应力均在允许范围内,不会对结构的安全性产生影响。In order to evaluate the impact of bridge pile foundation construction vibration on adjacent buildings,a soil building coupling three-dimensional model is established by using the finite element analysis software ANSYS/LS-DYNA,considering the impact vibration in‐duced by pile foundation construction on the soil layer around the building under the two working conditions of intact and damaged build‐ings.The results show that the vibration of pile foundation construction will cause the settlement deformation of the surrounding soil.Due to the impact effect,the vibration displacement of the surrounding soil fluctuates up and down.When the adjacent buildings are affected by the impact effect,the stress on the root of the building column is large.The soil displacement and structural member stress under the two work‐ing conditions are within the allowable range,which will not affect the safety of the structure.

关 键 词：桩基施工 冲击效应 安全性 有限元分析 

分 类 号：TU91[建筑科学—建筑理论]