Numerical modelling of slope stabilization with xathan gum-treated soil

An Tran Thi Phuong; Chang Ilhan; Nhan Tran Thanh; Cho Gye-Chun

doi:10.15625/2615-9783/17924

Author affiliations

Authors

Tran Thi Phuong An Department of Hydrogeological and Geotechnical Engineering, University of Sciences, Hue University, 77 Nguyen Hue, Hue 49000, Vietnam
Chang Ilhan Department of Civil System Engineering, Ajou University, 206 Worldcup-ro, Yeongtong-gu, Suwon 16499, Republic of Korea
Tran Thanh Nhan Department of Hydrogeological and Geotechnical Engineering, University of Sciences, Hue University, 77 Nguyen Hue, Hue 49000, Vietnam
Cho Gye-Chun Department of Civil Engineering, Korea Advanced Institute for Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea

DOI:

https://doi.org/10.15625/2615-9783/17924

Keywords:

xanthan gum, wetting soil-water characteristics, slope stability, rainfall, matric suction, FLAC2D

Abstract

Biopolymer soil treatment has been introduced as the latest technological innovation in soil stabilization and improvement. Biopolymers with agar, guar, xanthan, casein, gellan and sodium alginate have been commonly studied to improve strength, reduce hydraulic conductivity and prevent erosion of highly permeable soil materials. Among those, xanthan gum is introduced to perform better in terms of lowering permeability. In this study, the effect of xanthan gum on slope stability under rainfall was evaluated via a 2D finite-difference program (FLAC) considering the wetting behavior of xanthan gum-treated soil. In order to obtain input parameters for numerical modelling, wetting soil-water characteristic tests, permeability tests, and direct shear tests were conducted on xanthan gum-treated soils. The numerical results support the application of biopolymers to soil erosion control during rainfall, mainly due to the significant decrease in the infiltration of xanthan gum-treated soil.

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