摘要
为了研究砂性土中相同条件下设置空沟、排桩时隔振效果的优劣对比,以室外试验的方法对设置屏障时相同振源距、深度下两种隔振措施进行试验对比,结果表明:设置空沟时的隔振效果要明显优于排桩的隔振效果,当屏障深度、激振频率一定时,随着振源距离的增加,设置空沟时振幅降低比降低了0.069左右,排桩时振幅降低比降低了0.032左右.当屏障振源距、频率一定时,随着屏障深度增加,设置空沟时振幅降低比Ar值降低了0.069左右,排桩时,Ar值约降低了0.032.当振源距、屏障深度一定时,随着激振频率的增加,两种隔振措施的隔振效果都有所增强.
In order to study the advantages and disadvantages of the vibration isolation effect when setting up empty trenches and row piles under the same conditions in sandy soil,this paper uses the outdoor test method to test and compare two kinds of vibration isolation measures under the same vibration source distance and depth when setting the barrier.The results show that, when the empty trench is set,the vibration isolation effect is obviously better than the vibration isolation effect of the pile.When the barrier depth and the excitation frequency are fixed,the amplitude reduction ratio is reduced by 0.069 when the air gap is set.Left and right,the amplitude reduction ratio of the pile is reduced by about 0.032.When the distance between the source and the frequency of the barrier are constant,as the depth of the barrier increases,the amplitude of the gap decreases by about 0.069 when the groove is set,and the value of Ar decreases by about 0.032 when the pile is piled.When the vibration source distance and the barrier depth are fixed,the vibration isolation effects of the two vibration isolation measures are enhanced as the excitation frequency increases.
作者
刘航
刘晶磊
薛晓峰
李凯
温孟瑶
LIU Hang;LIU Jing-lei;XUE Xiao-feng;LI Kai;WEN Meng-yao(Hebei Key Laboratory for Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Hebei Zhangjiakou 075000)
出处
《河北建筑工程学院学报》
CAS
2019年第2期24-29,共6页
Journal of Hebei Institute of Architecture and Civil Engineering
基金
河北省创新基金(XB201924)
关键词
室外试验
隔振效果
对比
隔振屏障
outdoor test
vibration isolation effect
comparison
vibration isolation barrier
