层状地基下不同桩长排桩主动隔振研究  

Study on Active Vibration Isolation of Different Long-pile Rows under Layered Foundation

作　　者：周玮浩 刘佳凡 张伯杨 张业荣 夏彬 刘晶磊[1,2] ZHOU Weihao;LIU Jiafan;ZHANG Boyang;ZHANG Yerong;XIA Bing;LIU Jinglei(Hebei University of Architecture,Zhangjiakou,Hebei 075000;Hebei Key Laboratory of Diagnosis,Reconstruction and Disaster Resistance of Civil Engineering,Zhangjiakou 075000,Hebei,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

出　　处：《河北建筑工程学院学报》2023年第3期56-59,共4页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：河北建筑工程学院研究生创新基金(XY202203)。

摘　　要：为了研究层状地基下混凝土桩的隔振性能以及桩身长度的影响,采用室外模拟试验的方式进行。研究结果表明:采用混凝土桩作为隔振屏障,能够有效地提高隔振效果,且随着振源与控制点之间的距离的增大,相应Ar值减小,其隔振效果较明显,达到50%以上。但当振源与控制点之间的距离继续增大时,隔振效果将减弱。在本实验条件下,振源与控制点之间的距离为45cm~60cm时,其隔振效果最好,即为最优隔振区域。混凝土桩的桩身长度是一重要的影响因素,主要表现为桩长增加,桩的隔振效果相应提高,提高效果范围在1%~10%之间。In order to study the vibration isolation performance of concrete pile under layered foundation and the influence of pile length,outdoor simulation test was carried out.The results show that the concrete pile as the vibration isolation barrier can effectively improve the vibration isolation effect,and with the increase of the distance between the vibration source and the control point,the corresponding Ar value decreases,and the vibration isolation effect is more obvious,reaching more than 50%.However,when the distance between the source and the control point continues to increase,the isolation effect will be weakened.Under the experimental conditions,when the distance between the vibration source and the control point is 45cm~60cm,the vibration isolation effect is the best,which is the optimal vibration isolation area.The length of concrete pile is an important influencing factor,which is mainly manifested as the increase of pile length and the improvement of vibration isolation effect of concrete pile,which ranges from 1%to 10%.

关 键 词：混凝土桩 桩身长度 振幅降低比 主动隔振 

分 类 号：TU435[建筑科学—岩土工程]