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原文传递 INVESTIGATION OF THE EFFECTS OF PILE JETTING AND PREFORMING

题名：	INVESTIGATION OF THE EFFECTS OF PILE JETTING AND PREFORMING
作者：	Hameed, R.A., Kuo. C.. Reddy, D.V., and Sastry, P.
关键词：	jetting, preforming, lateral loading, pile
摘要：	Both jetting and preforming of piles cause substantial disturbance to the surrounding soil resulting in a notable change in the lateral load behavior. This report presents the results of an experimental study performed with simila model piles installed using (1) impact driving (2) jetting and (3) preforming in a sandy sod (with 10% c –ay compacted to different unit weights under unsaturated and saturated conditions. The effects of jetting pressure and preformed borehole diameter on the lateral load behavior of piles are presented in terms of normalized curves In addition, a computational model that can predict the effects of preforming on the lateral load of piles is also formulated. Then, the measured load-deformation behavior of preformed piles is compared computational predictions. The zone of influence of jetting on existing piles is also explored. This is through a testing program where the effects of axial and lateral load characteristics of existing driven piles jetting of other piles at designated locations, are monitored. The results indicate that the influence of jetting dry soil conditions extends up to about five times the pile diameter with respect to the lateral load character On the other band, no significant jetting influence zone was detected in completely saturated soils.
报告类型：	科技报告