한국지반신소재학회논문집 (Journal of the Korean Geosynthetics Society)

  • 제9권4호
  • /
  • Pages.47-55
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  • 2010
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  • 2508-2876(pISSN)
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  • 2287-9528(eISSN)
한국지반신소재학회 (Korean Geosynthetics Society)
권호 표지

토목섬유로 표층 처리된 초연약지반의 지지 메커니즘에 미치는 토목섬유와 지반의 마찰 영향

An Analytical Study on Bearing Mechanism of Very Soft Ground Covered with Geotextile by Effects of Friction between Ground and Geotextile

  • 안동한 (오사카대학 토목공학과 대학원) ;
  • 유승경 (명지전문대학 토목공학과)
  • 투고 : 2010.09.27
  • 심사 : 2010.12.22
  • 발행 : 2010.12.30
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초록

일반적으로 초연약지반에서는 건설장비의 주행성 확보 등을 위하여 토목섬유와 같은 표층 보강재를 적용하게 된다. 그러나 최근 토목섬유로 표층 처리된 초연약지반의 거동에 관한 많은 고찰이 수행되어 왔지만 대부분의 연구에서 토목섬유와 지반의 경계조건을 적절히 표현하지 못하고 있는 실정이다. 따라서 본 연구에서는 토목섬유와 지반의 경계조건이 토목섬유로 표층처리된 초연약지반의 거동에 미치는 영향에 대하여 수치해석적 고찰을 수행하였다. 수치해석에서는 토목섬유와 지반의 마찰에 대한 경계조건을 다양하게 표현하기 위하여 조인트 요소를 적용하였다. 수치해석의 결과는 기존의 실내모형실험 결과와의 비교를 통하여 그 신뢰성을 검증하였으며 파라메트릭 스터디를 통하여 토목섬유와 지반의 경계조건에 따른 초연약지반의 거동을 규명하였다.

In general, ground surface strengthening such as using geotextile is needed to secure trafficability of construction equipment. There are many researches for mechanical beha-vior of very soft ground covered with geotextile, however, most of them are under the condition to fix geotextile completely. In this study, numerical analyses were carried out to figure out the effects of restricting conditions of geotextile on bearing mechanism of very soft ground covered with geotextile. In numerical analyses, joint elements were used to figure out the friction properties between ground and geotextile. The results of numerical analyses were compared with the results of model test. In conclusion, the effects of restricting conditions of geotextile on bearing mechanism of very soft ground covered with geotextile became clear.

키워드

참고문헌

  1. Ahn, D.H., You, S.K., Oda, K and Tokida, K. (2008), "Effect of Length of Geotextile on Bearing Capacity of Very Soft Clay Ground with Geotextile through Numerical Analysis.", Proceedings of Second Japan-Korea Geotechnical Engineering Workshop, pp.13-17.
  2. Ahn, D.H. and You, S.K. (2009), "Numerical Analysis on Behaviors of Very Soft Ground Improved by Geotextile", j. Korean Geosynthetics Society, Vol.8, No.3, pp.9-16.
  3. Ahn, D.H., Oda, K., Tokida, K. and You, S.K. (2010a), "Numerical Analysis on Bearing Mechanism of Very Soft Ground Covered with Geotextile", ISOPE-2010 Beijing Conference, pp.720-725.
  4. Ahn, D.H., Oda, K, Tokida, K. and You, S.K. (2010b), "Effects of Yeild of geotextile on Bearing Mechanism of Very Soft Ground Covered with Geotextile", Twin International Conferences on Geotechnical and Geo-Environmental Engineering cum (7th) Ground Improvement Techniques, pp.43-50.
  5. Crisfield, M.A. (1981), "A Fast Incremental/iterative Solution Procedure that Handles Snap Through", Computer and Structure, Vol.13, pp.55-62. https://doi.org/10.1016/0045-7949(81)90108-5
  6. Fukusumi, K and Nishibayashi, K. (1967), "Surface Soil Stabilization of Soft Ground Using Vinylon Sheet", The 22th Conferences on Geotechnical Engineering, pp.1-4.
  7. Ham, T.K., Cho, S.D., Yang, K.S. and You, S.K. (2008), "A Study on The Improving Effects of the Bearing Capacity of Very Soft Ground by Restricting Conditions of Reinforcement", j. Korean Geosynthetics Society, Vol.7, No.3, pp.41-49.
  8. Ham, T.K., Cho, S.D., Yang, K.S. and You, S.K. (2009), "Characteristics of Settlement for Non-woven Geotextile through Cyclic Loading Model Test", j. Korean Geosynthetics Society, Vol.8, No.2, pp.11-20.
  9. Ortiz, M. and Simo, JC. (1986), "An Analysis of a New Class of Integration Algorithms for Elasoplasic Constitutive Relations", International Journal for Numerical Method in Engineering Vol.23, pp.353-366. https://doi.org/10.1002/nme.1620230303
  10. Watari, Y. et al (1986), "Field study of behavior of geogrids and soft ground", 3tj Int. Conf. of Geotextiles, pp.187-191.
  11. Yamanouchi, T. and Goto, K. (1979), Suggestion of Rational Bearing Capacity Formula for Surface Soil Stabilization Using Sheet, Weekly News of Engineering in Kyushu University, pp.201-207.