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Contribution of Vetiver Root on the Improvement of Slope Stability

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Abstract

Bio-engineering technology, using vegetation, offers an effective solution to slope protection, as the roots of the vegetation reinforce the earthen slopes and enhance their stability. This study attempts to evaluate the improved shear strength parameters of rooted soil and to determine the stability of vegetated slopes. The influence of vetiver grass (Chrysopogon zizanioides) root on shear strength of soil was studied. Extensive laboratory tests were performed to characterize the behavior of soil-root matrix. Laboratory direct shear tests were performed on reconstituted root mixed soil samples and also on undisturbed rooted soil samples for both clayey and sandy soils. Reconstituted soil samples were prepared by mixing the roots having different root lengths and root arrangements at varying moisture content of soil samples. Test results indicate that vetiver root has a significant contribution in enhancing the shear strength parameters of soil-root matrix. A maximum of 50% increase in shear strength was observed. Based on the test results of undisturbed rooted soil samples, a numerical analysis was conducted to evaluate the stability of vegetated slopes using PLAXIS 2D. Results show that the factor of safety of vegetated sandy slopes increased up to 20.6%. For clayey soil, the increase in factor of safety was insignificant due to the deep-seated failure. However, the presence of vetiver root increased the shear strength of soil and reduced the surface erosion which will increase the overall stability of the slopes. Therefore, utilization of vegetation can be a sustainable and environment-friendly technique against slope failure-related problems.

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References

  1. Su X, Zhou Z, Cao L, Liu J, Wang P (2021) Estimating slope stability by the root reinforcement mechanism of Artemisia sacrorum on the Loess Plateau of China. Ecol Model 444:109473

  2. Chok YH, Jaksa MB, Kaggwa WS, Griffiths DV (2015) Assessing the influence of root reinforcement on slope stability by finite elements. Int J Geo-Eng 6(1):1–13

    Article  Google Scholar 

  3. Islam MS, Islam T, Khatun N (2021) Permeability alteration of low plastic clay and poorly graded sand using lime and fly ash. Indian Geotech J 1–12

  4. Fan CC, Lai YF (2014) Influence of the spatial layout of vegetation on the stability of slopes. Plant Soil 377(1):83–95

    Article  Google Scholar 

  5. Feng S, Liu HW, Ng CWW (2020) Analytical analysis of the mechanical and hydrological effects of vegetation on shallow slope stability. Comput Geotech 118:103335

  6. O’Loughlin CL (1984) Effectiveness of introduced forest vegetation for protecting against landslides and erosion in New Zealand’s steep lands. In: Effects of forest land use on erosion and slope stability, Honolulu, Hawaii

  7. Neeraja VS, Geetha MK, Sivakumar Babu GL (2014) Numerical analysis of effect of orientation of fibers on stress–strain response of fiber reinforced soil. Int J Geotech Eng 8(3):328–334

    Article  Google Scholar 

  8. Islam MS, Badhon FF (2017) Sandy slope stabilization using vegetation. In: International conference on disaster risk mitigation, Dhaka, Bangladesh

  9. Badhon FF, Islam MS, Al-Hussaini TM (2019) Study of root-reinforcement effect on shear strength parameters of soil obtained by direct shear tests. In: International conference on disaster risk mitigation, Dhaka, Bangladesh

  10. Capilleri PP, Cuomo M, Motta E, Todaro M (2019) Experimental investigation of root tensile strength for slope stabilization. Indian Geotech J 49(6):687–697

    Article  Google Scholar 

  11. Wu TH, Watson A (1998) In situ shear tests of soil blocks with roots. Can Geotech J 35(4):579–590

    Article  Google Scholar 

  12. Islam MS, Badhon FF (2016) Characterization of soil-root system to determine the stability of vegetated slope, In: 3rd International conference on advances in civil engineering, 21–23 December 2016, CUET, Chittagong, Bangladesh

  13. Islam MS, Badhon FF (2020) A mathematical model for shear strength prediction of vetiver rooted soil. Geo-congress 2020: engineering, monitoring, and management of geotechnical infrastructure, American Society of Civil Engineers Reston, VA, pp 96–105

  14. Tengbeh GT (1989) The effect of grass cover on bank erosion. Ph.D. thesis, Silsoe College, Cranfield Institute of Technology

  15. Kar R, Pradhan P (2011) Strength and compressibility characteristics of randomly distributed fiber-reinforced soil. Int J Geotech Eng 5(2):235–243

    Article  Google Scholar 

  16. Patel SK, Singh B (2019) Shear strength and deformation behaviour of glass fibre-reinforced cohesive soil with varying dry unit weight. Indian Geotech J 49(3):241–254

    Article  Google Scholar 

  17. Islam MS, Shahin HM (2013) Reinforcing effect of vetiver (Vetiveria zizanioides) root in geotechnical structures-experiments and analyses. Geomech Eng 5(4):313–329

    Article  Google Scholar 

  18. Ali FH, Osman N (2008) Shear strength of a soil containing vegetation roots. Soils Found 48(4):587–596

    Article  Google Scholar 

  19. Islam MS, Arif MZ, Badhon FF, Mallick S, Islam T (2016) Investigation of vetiver root growth in sandy soil. In: BUET-ANWAR ISPAT 1st Bangladesh civil engineering SUMMIT, BUET, Dhaka, Bangladesh, pp 62–69

  20. Wang GY, Huang YG, Li RF, Chang JM, Fu JL (2020) Influence of vetiver root on strength of expansive soil-experimental study. PLoS ONE 15(12):e0244818

  21. Voottipruex P, Bergado D, Mairaeng W, Chucheepsakul S, Modmoltin C (2008) Soil reinforcement with combination roots system: a case study of vetiver grass and acacia mangium willd. Lowland Technol Int 10(2):56–67

    Google Scholar 

  22. Mickovski S, van Beek L, Salin F (2005) Uprooting of vetiver uprooting resistance of vetiver grass (Vetiveria zizanioides). Plant Soil 278:33–41

    Article  Google Scholar 

  23. Islam MS, Shahriar BAM, Shahin HM (2013) Study on growth of vetiver grass in tropical region for slope protection. Int J GEOMATE 5(2):729–734

    Google Scholar 

  24. Islam MA (2018). Measures for landslide prevention in Chittagong Hill Tracts of Bangladesh. M.Sc. Engg. thesis, Department of Civil Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.

  25. Islam MA, Islam MS, Chowdhury ME, Badhon FF (2021) Influence of vetiver grass (Chrysopogon zizanioides) on infiltration and erosion control of hill slopes under simulated extreme rainfall condition in Bangladesh. Arab J Geosci 14(2):1–14

    Google Scholar 

  26. Hengchaovanich D (2004) Fifteen years of bioengineering in the wet tropics: from A (Acacia auriculiformis) to V (Vetiveria zizanioides). Ground and water bioengineering for erosion control and slope stabilization 31–40

  27. Badhon FF, Islam MS, Islam MA, Arif MZU (2021) A simple approach for estimating contribution of vetiver roots in shear strength of a soil-root System. Innov Infrastruct Solut 6(96). https://doi.org/10.1007/s41062-021-00469-1

  28. ASTM D3080/D3080M-11 (2011) Standard test method for direct shear test of soils under consolidated drained conditions, ASTM International, West Conshohocken, PA

  29. Hossain MS, Islam MA, Badhon FF, Imtiaz T (2021) Properties and behavior of soil—online lab manual, Mavs Open Press

  30. Fan CC, Su CF (2008) Role of roots in the shear strength of root-reinforced soils with high moisture content. Ecol Eng 33(2):157–166

    Article  Google Scholar 

  31. Tsige D, Senadheera S, Talema A (2020) Stability analysis of plant-root-reinforced shallow slopes along mountainous road corridors based on numerical modeling. Geosciences 10(1):19

    Article  Google Scholar 

  32. Islam MA, Islam MS, Elahi TE (2020) Effectiveness of vetiver grass on stabilizing hill slopes: a numerical approach. Geo-congress 2020: engineering, monitoring, and management of geotechnical infrastructure, American Society of Civil Engineers, Reston, VA, pp 106–115

  33. Chatterjee D, Krishna AM (2019) Effect of slope angle on the stability of a slope under rainfall infiltration. Indian Geotech J 49(6):708–717

    Article  Google Scholar 

  34. Islam MS, Islam MA (2018) Reduction of landslide risk and water-logging using vegetation. In: E3S web of conferences, 65, 06003. EDP Sciences

  35. Oshunsanya SO (2008) Effects of vetiver grass strips on soil erosion, maize yield and spatial variability of surface soil characteristics. Ph.D. thesis, University of Ibadan

  36. Sriwati M, Pallu S, Selintung M, Lopa, R (2018) Bioengineering technology to control river soil erosion using vetiver (Vetiveria Zizaniodes). In: IOP conference series: earth and environmental science (vol 140, no 1, p 012040). IOP Publishing

  37. Rahardjo H, Kim Y, Satyanaga A (2019) Role of unsaturated soil mechanics in geotechnical engineering. Int J Geo-Eng 10(1):1–23

    Article  Google Scholar 

  38. Sudhishri S, Dass A, Lenka NK (2008) Efficacy of vegetative barriers for rehabilitation of degraded hill slopes in eastern India. Soil Tillage Res 99:98–107

    Article  Google Scholar 

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Acknowledgements

The authors would like to thank the Directorate of Advisory, Extension and Research Services (DAERS), Bangladesh University of Engineering and Technology (BUET), Dhaka, for supporting this work.

Funding

The research was funded by the Academic Research Grant of the Bangladesh University of Engineering and Technology (BUET).

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Authors and Affiliations

  1. Department of Civil Engineering, The University of Texas at Arlington, 701 W Nedderman Dr, Arlington, TX, 76019, USA

    Faria Fahim Badhon & Md Azijul Islam

  2. Department of Civil Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh

    Mohammad Shariful Islam & Md Azijul Islam

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  1. Faria Fahim Badhon
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Correspondence to Faria Fahim Badhon.

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Badhon, F.F., Islam, M.S. & Islam, M.A. Contribution of Vetiver Root on the Improvement of Slope Stability. Indian Geotech J 51, 829–840 (2021). https://doi.org/10.1007/s40098-021-00557-0

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