복합 경계면요소 수치해석에 의한 매립지 안정성 해석

Stability Analysis of Waste Landfill Using Multi-interface Element Numerical Method

  • 장연수 (동국대학교 토목환경공학과) ;
  • 김홍석 (동국대학교 대학원 토목환경공학과)
  • 발행 : 2004.06.01

초록

본 연구에서는 복합 경계면요소를 이용한 비선형 응력-변형 모델을 이용하여 쓰레기 매립지의 안정성해석을 수행하였다. 쓰레기 매립층의 응력-변형 거동 특성은 국내외 쓰레기의 삼축압축 강도시험 수행결과로써 결정하였고, 경계면 요소의 모델 변수 값은 여러 가지 차수재의 전단시험 결과를 적용하였다. 해석방법에 대한 검증을 위하여 국내 페기물 관리법에 준하는 매립지 모델을 선정하여 안정성해석을 실시하였다. 쓰레기에 대한 삼축압축시험과 토목섬유재에 대한 응력-변형 특성을 분석한 결과 쓰레기는 선형거동을 그리고 토목섬유는 비선형거동을 나타내는 것으로 나타났다. 경계면요소를 이용한 복합차수층 매립지의 안정성 해석결과 매립지 바닥면과 사면의 경계부에서 응력집중과 차수계의 전단변위가 크게 나타나 토목섬유라이너가 포설된 복합차수층의 경우는 복합 경계면 요소가 적용된 해석이 필요함을 알 수 있었다.

A finite element nonlinear stress-deformation model with multi-interface element is applied to the stability analysis of waste landfill slope. Strength parameters of waste and geosynthetic materials are obtained from the triaxial test of waste and the direct shear test of geosynthetics, respectively. The landfill models used for the numerical models are fit to regulations of the Korean waste management law. The results of the strength tests showed linear behavior for the waste and nonlinear behavior for the eosynthectic materials. The stability analysis with multi-interface element for the geosynthetic materials in the liner system showed large shear stress and slippage at the boundary of the foundation and the slope of the waste fill. This analysis verified the necessity of multi-interface analysis for waste landfills with composite liners.

키워드

참고문헌

  1. Proceedings of the Geosynthetics '93 Conference Stability of Soil-Coverd Geosynthetic-Lined Slopes: A Parametric Study Bourdeau, P. L.;Ludlow, S. J.;Simpson, B. E.
  2. Contract Report S-69-6 Finite Element Analysis of Port Allen and Old River Locks Clough, R. W.;Duncan, J. M.
  3. Proceedings of the International Symposium on Rock Fracture v.1 A Computer Model for Simulating Progressive, Large-scale Movements in Blocky Rock Systems Cundall, P. A.
  4. Geotechnical Engineering Research Report No. UCB/GT/80-01 Strength, Stress-Strain and Bulk Modulus Parameters for Finite Element Analysis of Stresses and Movements in Soil Masses Duncan, J. M.;Bryne, P.;Wong, K. S.;Mabry, P.
  5. Proceedings of the Geosynthetics '93 Conference Structural Integrity of Composite Geosynthetic Lining and Cover Systems Gilbert, R. B.;Lona, J. H.;Daly, J. J.
  6. Proceedings of the Geosynthetics '89 Conference Stability of Soil Layers on Geosynthetic Lining Systems Giroud, J. P.;Beech, J. F.
  7. ASCE v.94 no.SM3 A Model for the Mechanics of Jointed Rock Goodman, R. E.;Taylor, R. L.;Brekke, T. L.
  8. Proceedings of Fifih International Landfill Symposium. S. Margherita di Pula v.2 The Use of Triaxial Tests for the Mechanical Characterization of MSW Grisolia, M.;Napoleoni, Q.;Tancredi, G.
  9. Geotextiles and Geomembranes v.10 Stability and Tension Considerations Regarding Cover Soils on Geomembrane Lined Slopes Koener, R. M.;Hwu, B. L. https://doi.org/10.1016/0266-1144(91)90010-T
  10. Geoenvironment 2000, Characterization, Contaninment, Remedation, and Performance in Environment Geotechnics;Geotechnical Special Publication no.44 Stability Analysis of Landfill Slopes: A Probabilistic Approach Landrum, J. M.;Bourdeau, P. L.;Deschamps, R. J.
  11. Geoenvironmental Engineering Conference 97 The Slope Stability of Geomembranes in Landfill Facillities Littlemore, D. S.;Rogers, K. S.
  12. Journal of Geotechnical Engineering v.116 no.4 Kettleman Hills waste Iandfill slope failure I: liner-system properties Mitchell, J. K;Seed, R. B.;Seed, H. B. https://doi.org/10.1061/(ASCE)0733-9410(1990)116:4(647)
  13. Waste Containment System, Waste Stabilizationand Landfills : Design and Evaluation Sharma, H. D.;Lewis, S. P.
  14. Geotextile and Geomembranes v.17 Analysis of Geosynthetic Lining Systems(GLS) Undergoing Large Deformations Villard, P.;Gourc, J. P.;Feki, N. https://doi.org/10.1016/S0266-1144(98)00022-3
  15. Proceedings of the Geosynthetics '93 Conference Finite Element Analysis of Stability of Cover Soil on Geomembrane-lined Slopes Wilson-Fahmy, R. F.;Koerner, R. M.