한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)

한국지반공학회 (Korean Geotechnical Society)
권호 표지

지중강판 구조물의 최소토피고 평가 및 상부토피 보강 방안

Evaluation of minimum depth of soil cover and reinforcement of soil cover above soil-steel bridge

  • 정현식 (서울대학교 지구환경시스템공학부) ;
  • 이종구 (포항산업과학원 강구조연구소 토목구조연구팀) ;
  • 조성민 (한국도로공사 도로교통기술원) ;
  • 김명모 (서울대학교 지구환경시스템공학부)
  • Jung, Hyun-Sik (School of Civil, Urban & Geotechnical Engineering, Seoul National University) ;
  • Lee, Jong-Ku (Researcher, Civil Engineering Research Team, RIST) ;
  • Cho, Sung-Min (Korea Highway Corporation) ;
  • Kim, Myoung-Mo (School of Civil, Urban & Geotechnical Engineering, Seoul National University)
  • 발행 : 2004.03.25
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초록

In this paper, the results of the numerical analysis for the minimum depth of soil cover have been compared with those of currently suggested codes. Based on this comparison, the minimum depth of soil cover for the structures with long spans was suggested. Results showed that the actual depth of the soil cover required against soil failure over a circular and low-profile arch structure does not vary significantly with the size of the span and for the circular structure, the minimum depth of the soil cover was about 1.5m, and for the low-profile arch structures, below about 1.6m. And the previously established code in which the minimum depth of soil cover is defined to linearly increase with the increase in the span (CHBDC, 2001) was very conservative. For the structure with the relieving slab, the maximum live load thrust was reduced by about 36 percent and the maximum moment about 81 percent. The numerical analysis gave more conservative estimation of the live-load thrusts than the other design methods.

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