교대말뚝기초의 측방이동 판정기준 분석

Design Guidelines of Piled Bridge Abutment subjected to Lateral Soil Movements

  • 정상섬 (연세대학교 공과대학 토목공학과) ;
  • 이진형 (연세대학교 공과대학 토목공학과) ;
  • 서동희 (연세대학교 공과대학 토목공학과) ;
  • 김유석 (대우건설 기술연구소 토목팀) ;
  • 장범수 (시설안전기술공단 기술개발지원실)
  • 발행 : 2002.03.01

초록

A series of centrifuge model tests were performed to investigate the behavior of piled bridge abutment subjected to lateral soil movements induced by the construction of approach embankment. In these tests, both the depth of soft clay and the rate of embankment construction are chosen as key parameters to examine the effects on lateral soil movements. The depth of soft clay layer varies from 5.2 m to 11.6 m, and the rate of embankment construction has two types of staged construction(1m/30days, 1m/15days) and instant construction. It is shown that, the distribution of lateral flow induced by stage embankment construction has a trapezoidal distribution. And practical guidelines to check the possibility of some lateral movement of piled abutment were investigated. The validity of the proposed guidelines by centrifuge test was compared with the observed performance by lateral movement index, F(Japan Highway Public Corporation) and modified I index(Korea Highway Corporation). Based on the results obtained, the critical values of F and modified I, as a practical guidelines, are proposed to 0.03 and 2.0, respectively.

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