Fig. 1. FEA Model correspond with experimental model test
Fig. 2. Relationship of stress-strain in hardening soil model (Schanz et al., 1999)
Fig. 3. FEA results for evaluation of cavity and relaxation zone in ground
Fig. 4. FEA Model considering sewerage damage width and soil depth
Fig. 5. Void ratio distribution
Fig. 6. Settlement distribution of ground surface
Fig. 7. Variation of maximum settlement on ground surface
Fig. 8. Shear stress distribution
Fig. 9. Distribution of shear stress reduction ratio
Fig. 10. Aspect ratio according to sewerage damage width
Fig. 11. Aspect ratio according to soil depth
Table 1. Soil parameters of hardening soil model in FEA
Table 2. FEA Cases
References
- An, J. S., Kang, K. N., Song, K. I., and Kim, B. C. (2018), "A Numerical Study on the Characteristics of Small Underground Cavities in the Surrounding Old Water Supply and Sewer Pipeline", Journal of Korean Tunnelling and Underground Space AssociationJ, Vol.20, No.2, pp.287-303. https://doi.org/10.9711/KTAJ.2018.20.2.287
- Bae, Y. S., Kim, K. T., and Lee, S. Y. (2017), "The Road Subsidence Status and Safety Improvement Plans", Journal of the Korea Academia-Industrial cooperation Society, Vol.18, No.1 pp.545-552. https://doi.org/10.5762/KAIS.2017.18.1.545
- Benz, T. (2007), Small-Strain Stiffness of Soils and its Numerical Consequences, Ph.D. Thesis, University of Stuttgart.
- Choi, Y. W. (2016), "A Study on Identifying and Managing the Mechanism of Generating Cavity Mechanism in Seoul", Korean Geosynthetics Society, Vol.15, No.1, pp.8-10.
- Cooper, A. H. (1986), "Subsidence and Foundering of Strata Caused by the Dissolution of Permian Gypsum ing Ripon and Bedale Areas, North Yorkshire", Geological Society, London, Special Publications, Vol.22, No.1, pp.127-139. https://doi.org/10.1144/GSL.SP.1986.022.01.11
- Drumm, E. C., Akturk, O., Akgun, H., and Tutluoglu, L. (2009), "Stability Charts for the Collapse of Residual Soil in Karst", Journal of Geotechnical and Geoenvironmental Engineering, Vol.135, No.7, pp.925-931. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000066
- Kim, J. B., You, S. K., Han, J. G., Hong, G. G., and Park, J. B. (2017), "A Study on Simulation of Cavity and Relaxation Zone Using Laboratory Model Test and Discrete Element Method", Journal of Korean Geosynthetics Society, Vol.16, No.2, pp.11-21. https://doi.org/10.12814/jkgss.2017.16.2.011
- Kim, N. Y. and Umm, T. W. (2013), "A Case Study on the Chimney Collapse of Tunnel under Construction", Proceeding of Korean geo-environmental society, Seoul, pp.43-53.
- Korea institute of geoscience and mineral resources (2014), Research on causes and policy suggestions by sinkhole type, Research report, pp.18-39.
- Kuwano, R., Sato, M., and Sera, R. (2010), "Study on the Detection of Underground Cavity and Ground Loosening for the Prevention of Ground Cave-in Accident", Japanese Geotechnical Journal, Vol.5, No.2, pp.219-229. https://doi.org/10.3208/jgs.5.219
- Lee, K. C., Park, J. H., Choi, B. H., and Kim, D. W. (2018), "Analysis of Influencing Factors on Cavity Collapse and Evaluation of the Existing Cavity Management System", Journal of Korean Geosynthetics Society, Vol.17, No.1, pp.45-54. https://doi.org/10.12814/JKGSS.2018.17.1.045
- Lee, S. H., Lee H. L., and Song, K. I. (2016), "The Effect of Formation of Spherical Underground Cavity on Ground Surface Settlement : Numerical Analysis Using 3D DEM", Journal of Korean Tunnelling and Underground Space Association, Vol.18, No.2, pp.129-142. https://doi.org/10.9711/KTAJ.2016.18.2.129
- Schanz, T., Verrmeer, P. A., and Bonnier, P. G. (1999), "The Hardening Soil Model: Formulation and Verification", Beyond 2000 in computational geotechnics, Balkema, Rotterdam, pp.1-16.
- Suchowerska, A. M., Merifield, R. S., Carter, J. P., and Clausen, J. (2012), "Prediction of Underground Cavity Roof Collapse Using the Hoek-Brown Failure Criterion", Computers and Geotechnics, Vol.44, pp.325-342.
- Tharp, T. M. (1999), "Mechanics of Upward Propagation of Covercollapse Sinkholes", Engineering Geology, Vol. 52, No.1, pp.22-33. https://doi.org/10.1016/S0013-7952(98)00051-9
- You, S. K., Kim, J. B., Han, J. G., Hong, G. G., Yun, J. M., and Lee, K. I. (2017), "A Study on Simulation of Cavity and Relaxation Zone Using Finite Element Method," Journal of Korean Geosynthetics Society, Vol.16, No.4, pp.67-74. https://doi.org/10.12814/JKGSS.2017.16.4.067
Cited by
- 포장층 두께와 교통하중 크기를 고려한 공동 발생 지반의 안정성 분석에 관한 수치해석 vol.18, pp.4, 2019, https://doi.org/10.12814/jkgss.2019.18.4.287