인발력을 받는 무리말뚝의 응력-변위 특성

Characteristics of Stress-Displacement on Uplift Loaded Group Piles

  • 이준대 (세명대학교 토목공학과) ;
  • 안병철 (충북대학교 토목공학과)
  • Lee, Jun-Dae (Department of Civil Engineering, Semyung University) ;
  • Ahn, Byeong-Cheol (Department of Civil Engineering, Chungbuk National University)
  • 발행 : 2005.09.30

초록

This experimental study was devoted to investigate skin friction of H group piles with uplift loading conditions in granite soil under laboratory test. Model piles made of steel embedded in weathered granite soil were used in this study. Pile arrangements($2{\times}2,\;3{\times}3$), pile space(2D, 4D, 6D), and soil density($D_r=40%,\;80%$) were tested. The main results obtained from the model tests can be summarized as follows. The series of tests found that ultimate uplift load and displacement for group piles were increased as piles space ratio increases to $D_r=40%$ of soil density. In the relative density of $D_r=80%$, bearing capacity for group piles was greater than for single pile. In the relative density of $D_r=40%$, the theoretical value of skin friction for group piles was greater than practical value. In the relative density of $D_r=80%$, both theoretical and practical value of skin friction for group piles were increased as piles space ratio increases.

키워드

참고문헌

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