http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Application of Cavity Expansion Theory for Evaluating Skin Friction of Tapered Piles in Sands
Suman Manandhar,Noriyuki Yasufuku,Kiyoshi Omine 한국지반공학회 2012 international journal of geo-engineering Vol.4 No.3
This paper discusses the effects of tapered pile penetration in sandy soils after having obtained evidence of its merits over straight-sided cylindrical piles in evaluating skin friction. Experimental model tests confirmed that a slight increase in the angle of tapering also led to a major increase in skin friction. Based on this evidence, the authors adopted an analytical solution to evaluate the skin friction of tapered piles, The cylindrical cavity expansion theory is an appropriate analytical closed-form solution in determining the skin friction of tapered piles at different phases of soils at different relative densities, A new arrangement was inserted by introducing a stress-dilatancy relationship in the ideal elastic-plastic model of cavity expansion application, n general. for easy computation, he angle of internal friction or dilatancy angle is assumed to he constant to compute the skin friction. This drawback was improved upon and both properties considered in evaluating skin friction at each depth iteratively. This paper assesses the results of paranietric studies on different types of model tests, prototype tests and real type pile tests in order to predict the proposed model. The proposed extended model validates the determination of skin friction using a stress-dilatancy relationship.