Comparison of DEM and FDM for analysis of road embankment in karst region

C. Kwak, K. Seo, J. Lee, I. Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Underground cavities are normally discovered in the North-Eastern part of South Korea, where the karst region spreads. This particular condition can create geotechnical hazard such as abrupt displacement, long-term settlement, cavity collapse, etc. In this research, a road embankment on the karst region is selected and analysed using Distinct Element Method (DEM) and Finite Different Method (FDM). In the DEM analysis, soil and rock mass are simulated using assemblies of circular balls. Porosity and particle-size distribution are also considered for evaluating the initial stress condition. In this study, it is focused on the estimate of elastic properties of specimen for FDM analysis based on case study using DEM analysis. A few numerical triaxial tests according to confining pressure have been performed and loading-unloading procedure is also simulated to determine Young's modulus and Poission's ratio. These properties are applied to FDM analysis of actual embankment section and compared with DEM analysis results.

Original languageEnglish
Title of host publicationRock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009
Pages465-470
Number of pages6
Publication statusPublished - 2010 Dec 1
EventRegional Symposium of the International Society for Rock Mechanics: Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst, EUROCK 2009 - Dubrovnik, Cavtat, Croatia
Duration: 2009 Oct 292009 Oct 31

Publication series

NameRock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009

Other

OtherRegional Symposium of the International Society for Rock Mechanics: Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst, EUROCK 2009
CountryCroatia
CityDubrovnik, Cavtat
Period09/10/2909/10/31

Fingerprint

distinct element method
Embankments
embankment
karst
road
Unloading
Particle size analysis
Hazards
cavity
Porosity
Elastic moduli
Rocks
Soils
soil analysis
Young modulus
elastic property
triaxial test
unloading
confining pressure
porosity

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Cite this

Kwak, C., Seo, K., Lee, J., & Park, I. (2010). Comparison of DEM and FDM for analysis of road embankment in karst region. In Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009 (pp. 465-470). (Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009).
Kwak, C. ; Seo, K. ; Lee, J. ; Park, I. / Comparison of DEM and FDM for analysis of road embankment in karst region. Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009. 2010. pp. 465-470 (Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009).
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abstract = "Underground cavities are normally discovered in the North-Eastern part of South Korea, where the karst region spreads. This particular condition can create geotechnical hazard such as abrupt displacement, long-term settlement, cavity collapse, etc. In this research, a road embankment on the karst region is selected and analysed using Distinct Element Method (DEM) and Finite Different Method (FDM). In the DEM analysis, soil and rock mass are simulated using assemblies of circular balls. Porosity and particle-size distribution are also considered for evaluating the initial stress condition. In this study, it is focused on the estimate of elastic properties of specimen for FDM analysis based on case study using DEM analysis. A few numerical triaxial tests according to confining pressure have been performed and loading-unloading procedure is also simulated to determine Young's modulus and Poission's ratio. These properties are applied to FDM analysis of actual embankment section and compared with DEM analysis results.",
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Kwak, C, Seo, K, Lee, J & Park, I 2010, Comparison of DEM and FDM for analysis of road embankment in karst region. in Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009. Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009, pp. 465-470, Regional Symposium of the International Society for Rock Mechanics: Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst, EUROCK 2009, Dubrovnik, Cavtat, Croatia, 09/10/29.

Comparison of DEM and FDM for analysis of road embankment in karst region. / Kwak, C.; Seo, K.; Lee, J.; Park, I.

Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009. 2010. p. 465-470 (Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Kwak C, Seo K, Lee J, Park I. Comparison of DEM and FDM for analysis of road embankment in karst region. In Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009. 2010. p. 465-470. (Rock Engineering in Difficult Ground Conditions - Soft Rocks and Karst - Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009).