Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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A Study on the Failure Behavior of Overhanging Geosynthetic-Reinforced Soil Structure Considering Dilatancy Characteristics of Compacted Soil

다짐토의 다일러턴시 특성을 고려한 역경사형 토목섬유 보강토 구조물의 파괴 거동 분석

  • Kim Eun-Ra (Dept. of Civil Engrg., Research Center of Industrial Technology, Chonbuk National Univ.) ;
  • Kang Ho-Keun (School of Mechanical and Aerospace, Institute of Marine Industry, Gyeongsang National University)
  • 김은라 (전북대학교 토목공학과 공업기술연구센터) ;
  • 강호근 (경상대학교 기계항공공학부, 해양산업연구소)
  • Published : 2004.12.01
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Abstract

In this paper, a mechanism of the soil structure reinforced by geosynthetics is discussed. The reinforcing mechanism is interpreted as an effect arising from the reinforcement works preventing the dilative deformation (negative dilatancy) of soil under shearing. A full-scale in-situ model test was carried out in Kanazawa of Japan (1994), and in the laboratory test the strength and the characteristics of deformation conducting a constant volume shear test are examined. The parameters needed in the FEM are also applied by using the experimental data. The elasto-plastic finite element simulation is carried out, and the results are quantitatively compared with that of experiment. As a results, it is known that the theoretical predictions could explain effectively the experimental results which are obtained by a full-scale in-situ model test.

본 연구는 토목섬유 보강토 구조물의 보강 메카니즘을 규명하고자 하는 목적으로 실시하였으며, 여기서 보강 메카니즘은 전단에 의한 다짐토의 체적 팽창(부의 다일러턴시)을 토목섬유에 의해 구속 억제하는 과정에서 생성되는 효과로 간주하고 있다. 실물 현장시험은 일본 Kanazawa(1994)에서 실시했으며, 실내시험으로는 등체적 전단시험을 실시하여 강도 및 변형특성을 조사하였고, 시험결과를 이용하여 유한요소해석에 필요한 재료 파라메타를 결정하였다. 또한, 탄소성 유한요소 해석을 실시하여 이론치와 실험 결과치를 정량적으로 비교 분석되었으며, 그 결과 유한요소 해석이 현장 시험을 유용하게 설명할 수 있는 것을 알 수 있었다.

Keywords

References

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