%A Lianyong SUN,Gang SHI,Xinzhuang CUI,Mingxiang ZHOU,Yongjun WANG,Fang JI,Xiaodong YAN %T Field test and analysis of vibration isolation of machine foundation by a row of holes in saturated soil %0 Journal Article %D 2020 %J Journal of Shandong University(Engineering Science) %R 10.6040/j.issn.1672-3961.0.2019.246 %P 88-97 %V 50 %N 3 %U {http://gxbwk.njournal.sdu.edu.cn/CN/abstract/article_1942.shtml} %8 2020-06-01 %X

The investigation was focused on the effects of using a row of holes for the reduction of nearby vibration response generated by the motion of a machine foundation on saturated soil. The analysis was accomplished with the aid of a series of field experiments and numerical simulation. 3D semi-analytical BE models were established to use a row of holes as active wave barrier to isolate the ground vibrations generated by the machine foundation laid on the surface of saturated soil foundation, and the effects of the model parameters on screening effectiveness were investigated and discussed in detail. The results showed that a row of holes could isolate the ground vibrations successfully. Increasing the radius and the depth, decreasing the net spacing between two successive holes increase the screening effectiveness. According to the results, it was suggested in the design that the hole radius should take the value of 0.1-0.15λR, and the hole depth and the net spacing between two successive holes should take the value no more than 1.0λR and 0.1λR, respectively. Moreover, the distance between the machine foundation and wave barriers affect the screening effectiveness, and the the distance was, the the screening effectiveness was. The number of holes in a row had less effect on the screening effectiveness. However, the bigger the number of holes in a row was, the larger the screening zone behind barriers was.