Experimental study on erosion resistance and ecological slope protection of guar gum-treated fiber-reinforcement loess

JIA Zhuo-long; YAN Chang-gen; LI Bo; SHI Yu-ling; LAN Heng-xing; XU Jiang-bo; BAO Han

doi:10.11779/CJGE202210014

Volume 44 Issue 10

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Chinese Journal of Geotechnical Engineering > 2022 > 44(10): 1881-1889. > DOI: 10.11779/CJGE202210014

JIA Zhuo-long, YAN Chang-gen, LI Bo, SHI Yu-ling, LAN Heng-xing, XU Jiang-bo, BAO Han. Experimental study on erosion resistance and ecological slope protection of guar gum-treated fiber-reinforcement loess[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(10): 1881-1889. DOI: 10.11779/CJGE202210014

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Experimental study on erosion resistance and ecological slope protection of guar gum-treated fiber-reinforcement loess

1.
School of Highway, Chang'an University, Xi'an 710064, China
2.
Zhengzhou Development and Investment Group Co., Ltd., Zhengzhou 450015, China
3.
School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
4.
State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

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Received Date: August 16, 2021
Available Online: December 11, 2022

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Abstract

Abstract

To improve the hydraulic characteristics of the fiber-reinforced loess, maintain the long-term stability of the loess slope, and promote the full play of the vegetation protection, the guar gum is used to cure the fiber-reinforced loess. The erosion resistance and the soil-water conservation capability of loess under different treatment methods are compared and analyzed by carrying out the direct shear tests, disintegration tests, penetration tests, soil-water characteristic tests and ecological slope protection tests. The results show that the addition of guar gum can significantly improve the erosion resistance and the soil-water conservation capability of fiber-reinforced loess. With the increase of guar gum content or curing age, the shear strength increases first and then decreases or stabilizes, and both the disintegration rate and the saturation permeability coefficient decrease first and then stabilize. The optimal guar gum content and curing age are 1.0% and 14 d. The optimally processed guar gum-treated fiber-reinforcement loess has better water retention capability, showing the excellent ecological slope protection effect under natural atmospheric rainfall conditions. The curing treatment of guar gum can promote fiber reinforcement, fill pores, bond loess particles, comprehensively improve the mechanical and hydraulic properties of the fiber-reinforced loess, and play a positive role in the process of engineering safety construction and soil-water conservation on the Loess Plateau.
- loess slope,
- guar gum,
- fiber-reinforcement loess,
- erosion resistance,
- soil-water retention capacity,
- ecological slope protection

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References

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