Characteristics of Compressive Strength of Geogrid Mixing Reinforced Lightweight Soil

지오그리드 혼합 보강경량토의 압축강도특성 연구

  • Published : 2006.07.30

Abstract

This paper investigates strength characteristics and stress-strain behaviors of geogrid mixing reinforced lightweight soil. The lightweight soil was reinforced with geogrid in order to increase its compressive strength. Test specimens were fabricated by various mixing conditions including cement content, initial water content, air content and geogrid layer and then unconfined compression tests were carried out. From the experimental results, it was found that unconfined compressive strength as well as stress-strain behavior of lightweight soil was strongly influenced by mixing conditions. The more cement content that is added to the mixture, the greater its unconfined compressive strength. However, the more initial water content or the more air foam content, the less its unconfined compressive strength. It was observed that the compressive strength of reinforced lightweight soil increased reinforcing effect by the geogrid for most cases. Stress-strain relation of geogrid mixing reinforced lightweight soil showed a ductile behavior rather than a brittle behavior. In reinforced lightweight soil, secant modulus ($E_{50}$) also increased as its compressive strength increased due to the inclusion of geogrid.

References

  1. 김수삼, 김병일, 한상재, 신형영 (2002), '준설토와 EPS를 혼합한 경량혼합처리토의 강도 특성', 한국철도학회 논문집, 제 5권, 제 2호, pp.61-69
  2. 김윤태, 권용규, 김홍주 (2005a), '준설토 재활용을 위한 무보강 및 보강 경량토의 압축거동특성 비교', 한국해양공학회지, 제19권, 제6호, pp.44-49
  3. 김윤태, 권용규, 김홍주, 조상찬 (2005b), '섬유혼합 보강경량토의 거동특성 분석', 대한토목학회 정기학술대회 논문집, pp.3362-3365
  4. 김주철, 이종규 (2002), '준설토를 이용한 경량기포혼합토의 역할적 특성연구', 한국지반공학회 논문집, 제18권, 제4호, pp.309-317
  5. 안용수 (2004), '남해안지역 준설토의 지역별 침강 및 침하특성', 동서대학교 석사학위 논문
  6. 윤길림, 김병탁 (2002), '준설토를 활용한 경량혼합토의 역학적 특성 연구', 한국지반공학회 논문집, 제18권, 제4호, pp.75-83
  7. 윤길림, 유승경 (2004), '현장발생토를 활용한 경량기포혼합토(LWFS)의 강도 및 변형특성', 한국지반공학회 논문집, 제20권, 제9호, pp.125-131
  8. 윤길림, 유승경 (2005), '수중양생 및 수압조건을 고려한 경량기포 혼합토의 거동', 한국지반공학회 논문집, 제21권, 제4호, pp.21-29
  9. 최진용, 김석윤 (1998), '한반도 주변해역 점토광물의 함량과 분포', 한국지구과학학회지, 제 19권, 제 5호, pp.524-532
  10. Gray, H.D., A.M. ASCE and Talal AI-Refeai. (1986), 'Behavior of Fabric-Versus Fiber-Reinforced Sand', Journal of Geotechnical Engineering, Vo1.112, No.8, pp.804-820 https://doi.org/10.1061/(ASCE)0733-9410(1986)112:8(804)
  11. Markou, I. and Droudakis, A. (2004), 'Evaluation of Sand-Geotextile Interaction by Triaxial Compression and Direct Shear Testing'
  12. Tang, Y. X., Tsuchida, T., Shirai, A., Ogata, H. and Shiozaki, K. (1996), 'Triaxial Compression Characterristics of Super Geo-Material Cured Underwater', Proceedings of 31st Conference on Geotechnical Engineering, pp.2493-2494
  13. Tsuchida, T., Takeuchi, D., Okumura, T. arid Kishida, T. (1996), 'Development of Lightweight Fill from Dredgings', Proc. of Environmental Geotechnics, Balkema, pp.415-420
  14. Yetimoglu, T., Inanir, M. and Inanir, O.E. (2005), 'A Study on Bearing Capacity of Randomly Distributed Fiber-Reinforced Sand Fills Overlying Soft Clay', Geotextiles and Geomembranes, Vo1.23, pp.174-183 https://doi.org/10.1016/j.geotexmem.2004.09.004