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Numerical Modeling of Soil-Cement based on Discrete Element Method

개별요소법을 이용한 시멘트 혼합토의 수치모델링

Sang-Guk Jeong1*
정 상국1*
1Professor, Department of Civil Engineering, Songwon University
*교신저자. *Corresponding Author. 
30 December 2016. pp. 33-42
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Abstract

Discrete Element Method was conducted for rock and coarse-grained materials in development of granular mechanics and related numerical model due to analyze and apply micromechanical property. And it was verified that the analysis to consider bonding effect was insufficient. In this study, to overcome limits of existing method, it was conducted to analyze difference between indoor test result and bonding effect using PFC3D). For indoor test of mixed soil, uniaxial compression tests by curing time and by cement content were performed. And, DEM to suitable for each condition of indoor test was conducted. In the result of this study, in terms of geotechnics, it was verified that DEM can be used for application as numerical laboratory as well as prediction of micro and macro behavior about bonding effect of mixed soil.

Keywords
Soil-cement
Bonding Effect
Micro behavior
Discrete element method
Numerical modeling

기존 개별요소해석은 암석과 조립재료를 대상으로, 미시거동 분석과 응용을 위한 입상체 역학 및 관련 수치모델의 개발 차원에서 수행되었으나, 시멘트 혼합토(soil-cement)의 본딩 효과를 고려한 분석은 미흡한 것으로 확인되었다. 본 연구에서는 기존의 한계성을 극복하기 위하여 개별요소법 수치모델 프로그램 PFC3D)을 이용한 시멘트 혼합토의 본딩 효과 및 실내시험 결과와의 분석을 수행하였다. 시멘트 혼합토에 대한 실내시험은 재령일을 고려한 일축압축강도시험과 시멘트 함유량에 따른 일축압축강도시험을 수행하였으며, 각 실내시험 조건에 적합한 개별요소해석을 수행하였다. 본 연구결과, 개별요소법은 지반공학적 측면에서, 혼합토의 본딩 효과에 대한 미시적 거동(micro behavior) 및 전체적 거동(macro behavior)의 예측뿐아니라, 수치시험실(numerical laboratory)로서 활용될 수 있음을 확인할 수 있었다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 15
  • No :4
  • Pages :33-42
  • Received Date : 2016-10-07
  • Revised Date : 2016-11-23
  • Accepted Date : 2016-12-06
  • DOI :https://doi.org/10.12814/jkgss.2016.15.4.033
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