轨道交通下层状地基中混凝土排桩隔振效果研究  

Study on Vibration Isolation Effect of Concrete Row Piles in Substratum of Rail Transit

作　　者：刘晶磊 陈丰泽[1,2,3] 胡子良 曹晋源 杨烁 LIU Jinglei;CHEN Fengze;HU Ziliang;CAO Jinyuan;YANG shuo(School of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000,Hebei,China;Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000,Hebei,China;Hebei Innovation Center of Transportation Infrastructure in Cold Region,Hebei University of Architecture,Zhangjiakou 075000,Hebei,China)

机构地区：[1]河北建筑工程学院土木工程学院,河北张家口075000 [2]河北建筑工程学院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]河北建筑工程学院河北省寒冷地区交通基础设施工程技术创新中心,河北张家口075000

出　　处：《噪声与振动控制》2024年第2期242-248,287,共8页Noise and Vibration Control

基　　金：青海省科技发展资助项目(2021YQ-217);2022年度河北省高等学校科学研究重点资助项目(ZD2022017)。

摘　　要：为了研究在轨道交通荷载作用下混凝土排桩的隔振效果,特建立“车轮-轨道-地基”耦合模型,通过轨道竖向不平顺功率谱建立不平顺轨道并模拟列车在其表面行驶过程,根据控制变量法研究在混凝土排桩几何参数变化的情况下对混凝土排桩隔振效果的影响,通过本文的研究结果表明:混凝土排桩具有一定的隔振效果,随着各个参数的变化其隔振效果也会发生改变;桩长的增加,地基表面和地基深处隔振效果增强;随着埋置深度和桩间距的增加,混凝土排桩的隔振效果均下降,布置混凝土排桩埋深越浅隔振效果越好,布置混凝土排桩越紧密隔振效果越好。在土层的分界面上会出现振动加强的效果,在实际施工中应注意土体分层面带来的影响。In order to study the vibration isolation effect of concrete row piles under the track traffic loads,the wheelrail-foundation coupling model is established.Through the analysis of the track vertical irregularity power spectrum,an irregular track model is established and the train operation process on the irregular track is simulated.Based on the control variable method,the influence of the geometrical parameters variation of the concrete row piles on the vibration isolation effect is studied.The research results show that the concrete row piles have a certain vibration isolation effect,and the vibration isolation effect can change with the change of the geometrical parameters of the row piles.With the increase of pile length,the vibration isolation effect of subgrade slope and foundation depth is enhanced.With the increase of burying depth and pile spacing,the vibration isolation effect of concrete row piles decreases.The smaller the buried depth of the concrete row piles is,the better the vibration isolation effect is.The closer the concrete row pile is,the better the vibration isolation effect is.The effect of vibration strengthening appears in the interface of soil layer,so,attention should be paid to the effect of soil layer interface in practical construction.

关 键 词：振动与波 轨道交通 耦合模型 不平顺轨道 混凝土排桩 隔振效果 

分 类 号：TU311.3[建筑科学—结构工程]