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Development of Dynamic p-y Curve for Jacked Pile by Centrifuge Test

원심모형 실험을 이용한 압입말뚝에 대한 동적 p-y 곡선 산정

Yoo, Min-Taek;Kwon, Sun-Yong;Lee, Il-Hwa
유민택;권선용;이일화

  • Received : 2016.01.07
  • Accepted : 2016.02.24
  • Published : 2016.03.31

Abstract

In this study, dynamic centrifuge tests in dry sand were conducted in order to evaluate the effect of pile installation on the dynamic p-y curve. According to the result of the pile installation effect on the dynamic p-y backbone curves, the subgrade resistance of a jacked pile in 40 g was found to be greater than that of a jacked pile in 1 g and a preinstalled pile in 1 g. It was also found that differences of the subgrade resistance decrease with the depth of the pile. Applicability of dynamic p-y backbone curve for the bored pile proposed by preceded researcher was evaluated by comparing with the result of centrifuge tests. In addition, dynamic p-y backbone curve for jacking/driven pile was developed by modifying that for the bored pile.

Keywords

Dynamic p-y curve;centrifuge test;pile installation effect;jacked pile;bored pile

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Acknowledgement

Grant : 연약지반구간 교량대체를 위한 침하억제공법 개발

Supported by : 국토교통부