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Reinforcing effect of vetiver (Vetiveria zizanioides) root in geotechnical structures - experiments and analyses

  • Islam, Mohammad S. (Dept. of Civil Engineering, Bangladesh University of Engineering and Technology) ;
  • Shahin, Hossain M. (Dept. of Civil Engineering, Nagoya Institute of Technology)
  • Received : 2012.09.04
  • Accepted : 2013.03.29
  • Published : 2013.08.25

Abstract

Vetiver grass (Vetiveria zizanioides) is being effectively used in many countries to protect embankment and slopes for their characteristics of having long and strong roots. In this paper, in-situ shear tests of the ground with the vetiver roots have been conducted to investigate the stabilization properties corresponding to the embankment slopes. Numerical analyses have also been performed with the finite element method using elastoplastic subloading $t_{ij}$ model, which can simulate typical soil behavior. It is revealed from field tests that the shear strength of vetiver rooted soil matrix is higher than that of the unreinforced soil. The reinforced soil with vetiver root also shows ductile behavior. The numerical analyses capture well the results of the in-situ shear tests. Effectiveness of vetiver root in geotechnical structures-strip foundation and embankment slope has been evaluated by finite element analyses. It is found that the reinforcement with vetiver root enhances the bearing capacities of the grounds and stabilizes the embankment slopes.

Keywords

References

  1. Cazzuffi, D., Corneo, A. and Crippa, E. (2006), "Slope stabilisation by Perennial "Gramineae" in Southern Italy: Plant growth and temporal performance", Geotech. Geol. Eng., 24(3), 429-447. https://doi.org/10.1007/s10706-005-4144-9
  2. Coppin, N.J. and Richards, I.G. (eds.) (1990), Use of Vegetation in Civil Engineering, Construction Industry Research and Information Association, Butterworth's, London.
  3. Dudai, N., Putievsky, E., Chaimovitci, D. and Ben-Hur, M. (2006), "Growth management of vetiver (Vetiveria zizanioides) under Mediterranean conditions", J. Environ. Manage., 81(1), 63-71. https://doi.org/10.1016/j.jenvman.2005.10.014
  4. Dunn, G.H. and Dabney, S.M. (1996), "Modulus of elasticity and moment of inertia of grass hedge stems", Transact. ASAE, 39(9), 947-952. https://doi.org/10.13031/2013.27580
  5. Erskine, J.M. (1992), "Vetiver grass: Its potential use in soil and moisture conservation in Southern Africa", South. Afr. J. Sci, 88(6), 298-299.
  6. Hashiguchi, K. (1980), "Constitutive equation of elastoplastic materials with elasto- plastic transition", J. Appl. Mech,. ASME, 102(2), 266-272.
  7. Hellin, J. and Haigh, M.J. (2002), "Better land husbandry in Honduras: Towards the new paradigm in conserving soil, water and productivity", Land Degradat. Develop., 13(3), 233-250. https://doi.org/10.1002/ldr.501
  8. Hengchaovanich, D. (1998), "Vetiver grass for slope stabilization and erosion control", Tech. Bull., No. 1998/2, PRVN/ORDPB, Bangkok, Thailand.
  9. Islam, M.N. (2003), "Use of vetiver in controlling water-borne erosion with particular reference to Bangladesh coastal region", Proceeding of the 3rd International Conference on Vetiver (ICV3), Guangzhou, China, 358-367.
  10. Islam, M.S., Arifuzzaman and Nasrin, S. (2010), "In-situ shear strength of vetiver grass rooted soil", Proceedings of Bangladesh Geotechnical Conference 2010: Natural Hazards and Countermeasure in Geotechnical Engineering, Dhaka, Bangladesh, 274-279.
  11. Islam, M.S., Arifuzzaman, Shahin, H.M. and Nasrin, S. (2013), "Effectiveness of vetiver root in embankment slope protection: Bangladesh perspective", Int. J. Geotech. Eng., 7(2), 136-148. https://doi.org/10.1179/1938636213Z.00000000023
  12. Ke, C.C., Feng, Z.Y., Wu, X.J. and Tu, F.G. (2003), "Design principles and engineering samples of applying vetiver eco-engineering technology for landslide control and slope stabilization of riverbank", Proceedings of 3rd International Conference on Vetiver, Guangzhou, China, 365-374.
  13. Mickovski, S.B., Van Beek, L.P.H. and Salin, F. (2005), "Uprooting resistance of vetiver grass (Vetiveria zizanioides)", Plant Soil, 103, 53-60.
  14. Mickovski, S.B. and Van Beek, L.P.H. (2009), "Root morphology and effects on soil reinforcement and slope stability of young vetiver (Vetiveria zizanioides) plants grown in semi-arid climate", Plant Soil, 324(1-2), 43-56. https://doi.org/10.1007/s11104-009-0130-y
  15. Nakai, T. (1985), "Finite element computations for active and passive earth pressure problems of retaining problems", Soil. Found., 25(3), 98-112. https://doi.org/10.3208/sandf1972.25.3_98
  16. Nakai, T. and Hinokio, T. (2004), "A simple elastoplastic model for normally and over consolidated soils with unified material parameters", Soil. Found., 44(2), 53-70.
  17. Nakai, T. Shahin, H.M., Kikumoto, M., Kyokawa, H., Zhang, F. and Farias, M.M. (2011), "A simple and unified three-dimensional model to describe various characteristics of soils", Soil. Found., 51(6), 1149-1168. https://doi.org/10.3208/sandf.51.1149
  18. Nakai, T., Shahin, H.M., Zhang, F., Hinokio, M., Kikumoto, M., Yonaha, S. and Nishio, A. (2010), "Bearing capacity of reinforced foundation subjected to pull-out loading in 2D and 3D conditions", Geotext. Geomembr., 28(3), 268-280. https://doi.org/10.1016/j.geotexmem.2009.09.013
  19. Rahman, M.M., Islam, M.A., Rashid, S.H., Mia, M.M.K. and Rahman, M.H. (1996), "Study on the distribution and potential of vetiver grass in Bangladesh", Bangladesh J. Plant Taxonomy, 3(2), 1-16.
  20. Roscoe, K.H. and Burland, J.B. (1968), "On the generalized stress-strain behaviour of 'wet' clay", Engineering Plasticity, Cambridge: Cambridge University Press, 535-609.
  21. Shahin, H.M., Nakai, T., Hinokio, M., Kurimoto, T. and Sada, T. (2004), "Influence of surface loads and construction sequence on ground response due to tunneling", Soil. Found., 44(2), 71-84.
  22. Shahin, H.M., Nakai, T., Zhang, F., Kikumoto, M. and Nakahara, E. (2011), "Behavior of ground and response of existing foundation due to tunneling", Soil. Found., 51(3), 395-409. https://doi.org/10.3208/sandf.51.395
  23. Truong, P.N. (1999), "Vetiver grass technology for land stabilisation, erosion and sediment control in the Asia Pacific region", Proceedings of First Asia Pacific Conference on Ground and Water Bioengineering for Erosion Control and Slope Stabilisation, Manila, Philippines, Int. Eros Control Assoc, Steamboat Springs, USA, 72-84.
  24. Truong, P.N. and Baker, D. (1998), "Vetiver grass system for environmental protection", Pacific Rim Vetiver Network, Office of the Royal Development Projects Board, Bangkok, Thailand, Technical Bulletin No. 1998/1.
  25. Truong P.N. and Loch, R. (2004), "Vetiver system for erosion and sediment control", Proceedings of 13th International Soil Conservation Organization Conference, Brisbane, Australia, 1-6.
  26. Van Beek, L.P.H, Wint, J., Cammeraat, L.H. and Edwards, J.P. (2005), "Observation and simulation of root reinforcement on abandoned Mediterranean slopes", Plant Soil, 278(1/2), 55-74. https://doi.org/10.1007/s11104-005-7247-4
  27. Verhagen, H.J., Jaspers, Focks, D.J.J., Algera, A. and Vu, M.A. (2008), "The use of vetiver in coastal engineering", Proceedings of Copedec VII, Dubai, UAE, Paper No. 119.
  28. Xu, L.Y. and Zhang, J. (1999), "An overview of the use of vegetation in bioengineering in China", Proceedings of Ground and Water Bioengineering for Erosion Control and Slope Stabilization, Manila, The Philippines.

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