DOI QR코드

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Design of geocell reinforcement for supporting embankments on soft ground

  • Latha, G. Madhavi (Department of Civil Engineering, Indian Institute of Science)
  • 투고 : 2010.09.17
  • 심사 : 2011.05.19
  • 발행 : 2011.06.25

초록

The methods of design available for geocell-supported embankments are very few. Two of the earlier methods are considered in this paper and a third method is proposed and compared with them. In the first method called slip line method, plastic bearing failure of the soil was assumed and the additional resistance due to geocell layer is calculated using a non-symmetric slip line field in the soft foundation soil. In the second method based on slope stability analysis, general-purpose slope stability program was used to design the geocell mattress of required strength for embankment. In the third method proposed in this paper, geocell reinforcement is designed based on the plane strain finite element analysis of embankments. The geocell layer is modelled as an equivalent composite layer with modified strength and stiffness values. The strength and dimensions of geocell layer is estimated for the required bearing capacity or permissible deformations. These three design methods are compared through a design example. It is observed that the design method based on finite element simulations is most comprehensive because it addresses the issue of permissible deformations and also gives complete stress, deformation and strain behaviour of the embankment under given loading conditions.

키워드

참고문헌

  1. Bathurst, R.J. and Jarrett, P.M. (1988), "Large-scale model tests of geo-composite mattresses over peat subgrades", Transportation Research Record 1188, Transportation Research Board. Washington, D.C., 28-36.
  2. Bathurst, R.J and Karpurapu, R. (1993), "Large-scale triaxial compression testing of geocell-reinforced granular soils", Geotech. Test. J., 16(3), 296-303. https://doi.org/10.1520/GTJ10050J
  3. Bathurst, R.J. and Knight, M.A. (1998), "Analysis of geocell reinforced soil covers over large span conduits", Comput. Geotech., 22, 205-219. https://doi.org/10.1016/S0266-352X(98)00008-1
  4. Bush, D.I., Jenner, C.G. and Bassett, R.H. (1990), "The design and construction of geocell foundation mattress supporting embankments over soft ground", Geotext. Geomembranes, 9, 83-98. https://doi.org/10.1016/0266-1144(90)90006-X
  5. Cowland, J.W. and Wong, S.C.K. (1993), "Performance of a road embankment on soft clay supported on a geocell mattress foundation", Geotext. Geomembranes, 12, 687-705. https://doi.org/10.1016/0266-1144(93)90046-Q
  6. Dean, R. and Lothian, E. (1990), "Embankment construction problems over deep variable soft deposits using a geocell mattress", Proceedings of Performance of Reinforced Soil Structures, British Geotechnical Society, London (UK), 443-447.
  7. Roy, D., Chiranjeevi, K., Singh, R. and Baidya, D.K. (2009), "Rainfall induced instability of mechanically stabilized earth embankments", Geomech. Eng., 1, 193-204. https://doi.org/10.12989/gae.2009.1.3.193
  8. Duncan, J.M. and Chang, C.Y. (1970), "Non-linear analysis of stresses and strains in soils", J. Soil Mech. Found. Div., 96(5), 1629-1653.
  9. Goodman, R.E., Taylor, R.L. and Brekke, T.L. (1968), "A model for the mechanics of jointed rock", J. Soil Mech. Found. Div., 94, 637-659.
  10. Hendricker, A.T., Fredianelli, K.H., Kavazanjiam, Jr. E. and McKelvey, III J.A. (1998), "Reinforcement requirements at a hazardous waste site", Proceedings of 6th International Conference on Geosynthetics, Atlanta (USA), 465-468.
  11. Henkel, D.J. and Gilbert, G.C. (1952), "The effect of rubber membranes on the measured triaxial compression strength of clay samples", Geotechnique, 3, 20-29. https://doi.org/10.1680/geot.1952.3.1.20
  12. Janbu, N. (1963), "Soil compressibility as determined by oedometer and triaxial tests", Proceedings of V1 European Conference on SMFE, Wiesbaden, pp 19-25.
  13. Jenner, C.G., Bush, D.I. and Bassett, R.H. (1988), "The use of slip line fields to assess the improvement in bearing capacity of soft ground given by a cellular foundation mattress installed at the base of an embankment", Proc. Int. Geotech. Symp. Theory and Practice of Earth Reinforcement, Balkema, Rotterdam (The Netherlands), 209-214.
  14. Johnson, W. and Mellor, P.B. (1983), Engineering plasticity, Ellis Marwood Ltd., Chichester (UK).
  15. Karpurapu, R. and Bathurst R.J. (1993), Users' manual for geotechnical finite element modelling GEOFEM, Vol.1-3, Department of Civil Engineering, Royal Military College, Kingston, Ontario (Canada).
  16. Krishnaswamy, N.R., Rajagopal, K. and Madhavi Latha, G. (2000), "Model studies on geocell supported embankments constructed over soft clay foundation", Geotech. Test. J., 23, 45-54. https://doi.org/10.1520/GTJ11122J
  17. Madhavi Latha, G. (2000), "Investigations on the behaviour of geocell supported embankments", Ph.D. thesis, Indian Institute of Technology Madras, Chennai, India.
  18. Madhavi Latha, G. and Murthy, V.S. (2007), "Effects of reinforcement form on the behaviour of geosynthetic reinforced sand", Geotext. Geomembranes, 25, 23-32. https://doi.org/10.1016/j.geotexmem.2006.09.002
  19. Madhavi Latha, G. and Rajagopal, K. (2007), "Parametric finite element analyses of geocell supported embankments", Can. Geotech. J., 44(8), 917-927. https://doi.org/10.1139/T07-039
  20. Madhavi Latha, G., Dash, S.K. and Rajagopal, K. (2008), "Equivalent continuum simulations of geocell reinforced sand beds supporting strip footings", Geotech. Geol. Eng., 26(4), 387-398. https://doi.org/10.1007/s10706-008-9176-5
  21. Madhavi Latha G., Rajagopal, K. and Krishnaswamy, N.R. (2006), "Experimental and theoretical investigations on geocell supported embankments", Int. J. Geomechanics, 6(1), 30-35. https://doi.org/10.1061/(ASCE)1532-3641(2006)6:1(30)
  22. Murali Krishna, A. and Madhavi Latha, G. (2007), "Seismic response of wrap-faced reinforced soil retaining wall models using shaking table tests", Geosynth. Int., 14(6), 355-364. https://doi.org/10.1680/gein.2007.14.6.355
  23. Puig, J. and Schaeffner, M. (1986), "The use of three dimensional geotextile to combat rainwater erosion", Proc. of Third International Conference on Geotextiles, Vienna, Austria, Vol. IV, 1137-1142.
  24. Rajagopal, K., Krishnaswamy, N.R. and Madhavi Latha, G. (1999), "Behavior of sand confined in single and multiple geocells", Geotext. Geomembranes, 17, 171-184. https://doi.org/10.1016/S0266-1144(98)00034-X
  25. Rajagopal, K., Krishnaswamy, N.R. and Madhavi Latha, G. (2001), "Finite element analysis of embankments supported on geocell layer using composite model", Proc. of 10th International Conference on Computer Methods and Advances in Geomechanics, IICMAG 2001, Arizona (USA).
  26. Rimoldi, P. and Ricciuti, A. (1994), "Design method for three dimensional geocells on slopes", Proc. of Fifth International Conference of Geotextiles, Geomembranes and Related Products, Singapore, 999-1002.
  27. US Army Corps of Engineers (1990), "Settlement analysis", Engineer manual EM-1110-1-1904, Joint Departments of the Army and Air Force, Washington, D.C.
  28. Wu, K.J. and Austin, D.N. (1992), "Three-dimensional polyethylene geocells for erosion control and canal linings", Geotext. Geomembranes, 11, 611-620. https://doi.org/10.1016/0266-1144(92)90035-9
  29. UFGS-35 73 13 (2008), "Embankment for earth dams", Unified Facility Guide Specifications, US Army Corps of Engineers, Washington, D.C.

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