层状地基下不同埋深排桩主动隔振试验研究  

Study on active vibration isolation under different buried deep foundations

作　　者：刘佳凡 周玮浩 张蕾 LIU Jiafan;ZHOU Weihao;ZHANG Lei(Hebei University of Architecture,Zhangjiakou,Hebei 075000;Hebei Key Laboratory of Civil Engineering Diagnosis,Reconstruction andDisaster Relief,Zhangjiakou,Hebei 075000;Shandong Eighth Geological and Mineral Exploration Institute,Rizhao,Shandong 267800)

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]山东省第八地质矿产勘查院,山东日照267800

出　　处：《河北建筑工程学院学报》2023年第4期44-48,共5页Journal of Hebei Institute of Architecture and Civil Engineering

摘　　要：为了研究混凝土桩在分层地基土下不同埋深排桩的主动隔振效果,采用模型试验的方式,通过WS-Z30型振动台系统研究桩的埋深对隔振效果的影响。得出以下结论:随着检测点与激振器之间距离的增加,Ar值逐渐减小,隔振效果较好,但是距离增大到一定值之后,Ar值呈上升趋势,隔振效果减弱。当埋深为10 cm、20 cm、30 cm时,最优隔振的距离为50 cm~70 cm之间。当桩的埋深为10 cm,最优隔振区域的Ar值的分布范围在0.44~1.218之间;当桩的埋深为20 cm,最优隔振区域Ar值的分布范围在0.452~1.23之间;当桩的埋深为30 cm,最优隔振区域的Ar值的分布范围在0.46~1.24之间。桩的埋置深度对混凝土桩的隔振性能影响显著,随着桩埋置深度的减小,最优隔振区域的Ar值降低,其隔振效果明显增加。In order to study the active vibration isolation effect of concrete piles with different buried depths under layered foundation soil,the model test was used to study the influence of pile buried depth on vibration isolation effect through WS-Z30 shaking table system.The following conclusions are drawn:concrete piles have obvious vibration isolation effect.With the increase of vibration source distance,Ar value decreases gradually and the vibration isolation effect is better.However,when the distance increases to a certain value,Ar value increases and the vibration isolation effect decreases.When the buried depth is 10 cm,20 cm and 30 cm,the optimal vibration isolation distance is between 30 cm and 40 cm.When the buried depth of pile is 10 cm,the distribution range of Ar value in the optimal vibration isolation area is between 0.44 and 1.218.When the buried depth of pile is 20 cm,the distribution range of Ar value in the optimal vibration isolation area is between 0.452 and 1.23.When the buried depth of pile is 30 cm,the distribution range of Ar value in the optimal vibration isolation area is between 0.46 and 1.24.The buried depth of the pile has a significant impact on the vibration isolation performance of concrete piles.With the decrease of the buried depth of the pile,the Ar value of the optimal vibration isolation area decreases,and its vibration isolation effect increases obviously.

关 键 词：主动隔振 混凝土桩 振幅降低比 埋置深度 

分 类 号：TU311.3[建筑科学—结构工程]