不同直径的水平排桩隔振效果的试验研究  

Experimental Study on Vibration Isolation Effect of Horizontal Row Piles with Different Diameters

作　　者：李秀欣 曹晋源 刘晶磊[1] LI Xiuxin;CAO Jinyuan;LIU Jinglei(Hebei University of Architecture,Zhangjiakou,Hebei 075000)

机构地区：[1]河北建筑工程学院,河北张家口075000

出　　处：《河北建筑工程学院学报》2024年第2期33-36,共4页Journal of Hebei Institute of Architecture and Civil Engineering

摘　　要：为了研究桩径对桩隔振效果的影响,采用控制变量法,对水平排桩的减振效果进行了分析。在此基础上,得到了如下结论:混凝土桩可以有效地隔绝振动波。在桩径相同条件下,随着控制点至振源距离的增大,振幅降低比Ar值会逐渐减小,但距离增大到700mm之后再增大,振幅降低比Ar值会逐渐增大,由此说明距离振源的远近影响隔振效果。隔振最优区域在550mm~850mm之间。排桩的桩径由50mm增加到100mm,Ar的最小值由0.37减小到0.192,即表示桩的隔振效果提高了48%;桩径由100mm增加到150mm,Ar的最小值由0.192减小到0.141,即表示桩的隔振效果提高了26%。说明在桩间距不变的条件下,随着桩径的增大,排桩的隔振效果逐渐增强。This test studied the influence of pile diameter on the vibration isolation effect of horizontal row piles through the control variable method,providing a basis for construction design.Under the test conditions,the following conclusionsare drawn:concrete piles can effectively isolte vibration waves.Under the condition of the same pile diameter,with the increase of the distance from the vibration source,the amplitude reduction ratio Ar value will gradually decrease,but after the distance increases to 700mm,the amplitude reduction ratio will increase Ar value will gradually increase,which indicates that the distance from the vibration source also affects the vibration Isolation effect.The optimal vibration isolation area is between 550mm and 850mm.The pile diameter of row piles is increased from 50mm to 100mm,and the minimum value of Ar is reduced from 0.37 to 0.192,which means that the vibration isolation effect of piles is improved by about 48%;The pile diameter increases from 100mm to 150mm,and the minimum value of Ar decreases from 0.192 to 0.141,which means that the vibration isolation effect of the pile is improved by about 26%.It shows that under the condition of constant pile spacing,the vibration isolation effect of row piles increases gradually with the increase of pile diameter.

关 键 词：主动隔振 桩径 试验研究 振幅降低比 

分 类 号：TU435[建筑科学—岩土工程]