Abstract:Based on the integral equation of Rayleigh wave scattering,piles are treated as irregular obstacles in elastic half-space. This paper presents three-dimensional multi-row piles as ground barriers for passive isolating vibration in far field for the first time. Effects of relevant parameters on the effectiveness of vibration isolation are analyzed and presented. The theoretical results demonstrate that the rows of piles as discontinuous barriers can be functioned as an integrated system to isolate ground vibration. The number of row mainly determines the thickness of barrier system,which affects screening effectiveness. The cross-section size of each pile may have less effect on the vibration isolation. The screening effectiveness by rows of small cross-section piles densely arranged can be as good as that of the open trench and in-filled trenches. The space between the pile rows may have less effect on the vibration reduction. The net spacing between piles along each row can be an important factor for the vibration isolation;it can be determined by the practical engineering. In order to obtain satisfied effectiveness of isolating vibration of the rows of piles as discontinuous barriers;the distance between piles in a row should be controlled close enough. At last,a case history proves the good isolation effect by rows of piles. The method and findings presented are useful in the design of ground barrier and can be used to predict the functions of rows of piles as barrier system for ground vibration.