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

Korean Geotechnical Society (한국지반공학회)
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The Characteristics of Various Stress in Cohesionless Soil with the Rammed Aggregate Pier

짧은 쇄석다짐말뚝(RAP)이 설치된 사질토지반의 응력변화 특성

  • Chun, Byung-Sik (Dept. of Civil Engineering, Hanyang University) ;
  • Kim, Kyung-Min (Dept. of Civil Engineering, Graduate School, Hanyang University) ;
  • Kim, Jun-Ho (Dept. of Civil Engineering, Graduate School, Hanyang University)
  • 천병식 (한양대학교 공과대학 토목공학과) ;
  • 김경민 (한양대학교 대학원 토목공학과) ;
  • 김준호 (한양대학교 대학원 토목공학과)
  • Published : 2005.03.25
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Abstract

RAP(rammed aggregate pier) method which is intermediate foundation of deep and shallow foundation is used to improve the ground with high compaction energy. This method is widely spread around the world, but there are few examples and systemic researches for failure mechanism and bearing capacity of this method are not organized yet. In this paper, soil laboratory tests were carried out to evaluate the applicability of RAP method as the foundation of a structure. And the bearing capacity and the failure mechanism of RAP method were studied with respect to various relative densities(35%, 65%, 90%), diameters(45mm, 60mm) and lengths(20cm, 30cm, 40cm). As results, stress concentration ratio decreased as diameter of RAP was increasing or length of RAP was decreased or relative density was decreased. however these results were not always constant. because systematic interaction between relative density and diameter and length of RAP can affect stress concentration ratio, more studies on stress concentration ratio are needed throughout laboratory and field tests.

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