地基中混凝土排桩主动隔振研究  

Research on active vibration isolation of concrete piles in foundation

作　　者：刘晶磊[1,2] 陈岩 陈丰泽 李秀欣 梅名彰 尹姜鳗 LIU Jinglei;CHEN Yan;CHEN Fengze;LI Xiuxin;MEI Mingzhang;YIN Jiangman(Hebei University of Architecture,Zhangjiakou 075000,China;Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Zhangjiakou 075000,China;Key Laboratory of Road and Railway Engineering Safety Control of Ministry of Education(Shijiazhuang Tiedao University),Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省土木工程诊断、改造与抗灾重点实验室,河北张家口075000 [3]道路与铁道工程安全保障省部共建教育部重点实验室(石家庄铁道大学),河北石家庄050043 [4]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《地震工程与工程振动》2024年第3期164-173,共10页Earthquake Engineering and Engineering Dynamics

基　　金：2023年张家口市市级科技计划财政资助项目(2311007A)。

摘　　要：为了探究地基中设置混凝土排桩后,排桩的各参数变化对近场主动隔振的影响规律,在有限元软件中建立与试验场地一致的三维有限元模型,通过计算与分析验证了有限元计算结果的有效性;参考TB 10621—2014《高速铁路设计规范》建立了足尺寸的有限元模型,分析在列车荷载作用下排桩的各参数变化对隔振效果的具体影响规律。研究结果表明:桩长参数对隔振效果影响较为明显,随着参数增大,隔振效果越理想,当桩长参数为10.5以后,继续增加比值,隔振效果提升不显著;随着桩间距参数越大,隔振效果越不理想,较小的桩间距可获得理想的隔振效果;埋深参数对隔振效果影响显著,参数越大,隔振效果越不理想,当参数为3.5时,隔振效果已很不理想,较浅埋深能获得较理想的隔振效果。In order to explore the influence of the parameter changes of piles on the near-field active vibration isolation after the concrete row piles were installed in the foundation,a three-dimensional finite element model consistent with the test site was established in the finite element software,and the finite element model was verified by calculation and analysis.The calculation results were verified and full-size finite element model was established with reference to the TB 10621—2014 Code for design of high-speed railway,and the specific influence of the parameter changes of row piles on the vibration isolation effect under the action of the train load was analyzed.The analysis results show that the effect of the pile length parameter on the vibration isolation effect is obvious.As the parameter increases,the vibration isolation effect is more ideal.When the pile length parameter is 10.5,the ratio will continue to increase,and the vibration isolation effect will not improve significantly.The larger the parameter is,the less ideal the vibration isolation effect is,and the smaller pile spacing can achieve the ideal vibration isolation effect.The burial depth parameter has a significant impact on the vibration isolation effect,the larger the parameter,the less ideal the vibration isolation effect.When the parameter is 3.5,the vibration isolation effect will be unsatisfactory,and a shallower burial depth can obtain a better vibration isolation effect.

关 键 词：混凝土排桩 主动隔振 有限元 列车荷载 

分 类 号：TU435[建筑科学—岩土工程]