Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Evaluation of critical tractive forces of vegetation mats enhanced with biopolymer mixed soil

바이오폴리머 혼합토와 결합된 식생매트의 한계 소류력 평가

  • Lee, Du Han (Department of Land, Water and Environment Research, Korea Institute of Civll Engineering and Building Technology) ;
  • Kim, Myounghwan (Department of Land, Water and Environment Research, Korea Institute of Civll Engineering and Building Technology)
  • 이두한 (한국건설기술연구원 국토보전연구본부) ;
  • 김명환 (한국건설기술연구원 국토보전연구본부)
  • Received : 2019.11.14
  • Accepted : 2020.03.03
  • Published : 2020.03.31
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Abstract

Recently, new levee material has been developed to enhance natural soil strength and vegetation growth using biopolymer. In the study, critical tractive force of vegetated mats mixed with biopolymer mixed soil has been evaluated to apply the mixed soil to levee construction material. The mixed soil has been produced by mixing beta-glucan, clay, and sand. Full scale test bodies have been constructed with 3 cm thick of the mixed soil. Total 4 test bodies have been constructed and experimented. Critical tractive forces have been evaluated by observation and measurement of failure conditions and soil loss. Although performance of the vegetated revetments are affected by vegetation coverage conditions, the critical tractive forces are shown about 40 N/㎡ and the critical velocities are shown about 4 m/sec by full scale experiment. Erosion resistance is also enhanced by combination of root and net with mat materials.

최근 바이오폴리머 소재를 이용하여 자연 흙의 강도와 식생의 생장을 증진하는 새로운 제방 소재가 개발되었다. 본 연구에서는 바이오폴리머 혼합토를 친환경 제방 재료로 활용하기 위해 혼합토로 조성된 식생 매트의 한계 소류력을 평가하였다. 혼합토는 베타글루칸을 주재료로 모래와 황토를 혼합하여 조성하였다. 실규모 시험체를 제작하여 혼합토를 3 cm 도포하였으며 식생과 매트를 이용하여 4개의 시험체를 제작하였다. 실규모 실험에 의해 손상과 토양유실을 관측하여 한계 소류력을 결정하였다. 식생 호안의 특성상 식생의 피복도에 따라 영향을 받기는 하지만 식생이 활착된 경우 개략적으로 한계소류력 42 N/㎡, 한계유속 4 m/sec을 실험을 통해 확인하였다. 또한 매트공법이 적용된 경우에는 뿌리와 매트의 결합으로 침식저항성이 강화됨을 확인하였다.

Keywords

References

  1. ASTM (2007). "Standard test method for determination of rolled erosion control product performance in protecting earthen channels from stormwater-induced erosion." ASTM D6460-07, ASTM International.
  2. Bhatia, S.K., Rao, G.V., and Smith, J.L. (2010). "International practices and guidance: natural-fiber rolled erosion control products." International Conference on Scour and Erosion 2010, ASCE, pp. 231-241.
  3. Casas, B., Montavez, I., Bertran, M., Sanchis, E., and Fos, M. (2002). "Evaluation of different erosion control covers in the revegetation of slope areas." Proceedings of 33rd Annual Conference, IECA, Orlando, F.L., U.S., pp. 31-36.
  4. Chang, I., Prasidhi, A.K., Im, J., Shin, H.D., and Cho, G.C. (2015). "Soil treatment using microbial biopolymers for anti-desertification purposes." Geoderma, Vol. 253-254, pp. 39-47. https://doi.org/10.1016/j.geoderma.2015.04.006
  5. Chang, Y.J., Lee, S., Yoo, M.A., and Lee, H.G. (2006). "Structural and biological characterization of sulfated derivatized oat ${\beta}$-glucan." Journal of Agricutural and Food Chemistry, Vol. 54, pp. 3815-3818. https://doi.org/10.1021/jf060243w
  6. Han, E.J., Hwang, S.D., Kim, Y.D., Park, J.H., and Kim, C. (2010). "A study on hydraulic stability of vegetation mat method on high water revetment." Journal of Wetlands Research, KWS, Vol. 12, No. 2, pp. 75-89.
  7. Jang, C.L., Lee, S.K., and Kim, J.H. (2011). "Experimental study on the resistance of erosion of the river banks covered with vegetation-mat." 2011 Proceedings of the Korea Water Resources Association Conference, pp. 346-350.
  8. Jeong, H., Jang, H.Y., Ahn, S.J., and Kim, E. (2019). "${\beta}$-Glucan- and Xanthan gum-based biopolymer stimulated the growth of dominant plant species in the Korean riverbanks." Ecology and Resilient Infrastructure, Vol. 6, No. 3 pp. 163-170. https://doi.org/10.17820/ERI.2019.6.3.163
  9. Lee, D.H., Kim, D.H., Kim, M., and Rhee, D.S. (2012). "A real scale experimental study for evaluation of permissible shear stresses on vegetation mats." Journal of the Korea Academia-Industrial cooperation Society, Vol. 13, No. 12. pp. 6151-6158. https://doi.org/10.5762/KAIS.2012.13.12.6151
  10. Lee, D.H., Rhee, D.S., and Kim, M. (2013). "Determination of permissible shear stresses on vegetation mats by soil loss evaluation." Journal of the Korea Academia-Industrial cooperation Society, Vol. 14, No. 11 pp. 5956-5963. https://doi.org/10.5762/KAIS.2013.14.11.5956
  11. McCullah, J., and Howard, V. (2000). "Shasta college erosion control blanket study, research quantifies erosion from slopes." Land and Water, Vol. 44, No. 5, pp. 21-23.
  12. Ministry of Land, Infrastructure and Transport (MOLIT) (2016). Research for preparation of stability certification system for river revetment. Korean official publication, No. 11-1613000-001823-01, pp. 136-156.
  13. Rhee, D.S., Ahn, H.K., Woo, H., and Kwon, B.A. (2007). "Application and assessment of new vegetation revetment techniques considering safety and against flood and environmental performance." Journal of Korea Water Resources Association, Vol. 40, No. 2, pp. 125-134. https://doi.org/10.3741/JKWRA.2007.40.2.125
  14. Seo, Y., Lee, S., Heo, C., and Jee, H. (2006). "Reduction of tractive force by revetment mattress/filter.", Journal of the Environmental Sciences, Vol. 15, No. 1, pp. 33-43. https://doi.org/10.5322/JES.2006.15.1.033
  15. Smith, J.L., Bryz-Gornia, C.J., Bhatia, S.K., and Walowsky, D. (2005). "A comparative study of RECPs: lab testing and field performance.", GeoFrontiers Congress 2005, ASCE, T.X., U.S.