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Numerical analysis of an expansive subgrade slope subjected to rainfall infiltration

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Abstract

A numerical simulation approach fully considered the processes of unsaturated seepage and wetting-induced swelling of unsaturated expansive soil subjected to rainfall infiltration was proposed in this paper. Firstly, a laboratory model test was conducted to verify the accuracy of proposed algorithm. Then, the behavior and failure mode of an expansive subgrade under rainfall conditions was revealed. Finally, a parametric study was conducted to investigate the influences of rainfall intensity, initially matric suction, and slope ratio. The results show that (1) the accuracy and effectiveness of the numerical simulation approach proposed have been well verified. (2) The failure mechanism of an expansive subgrade exhibits a typical shallow slide tendency initiating from the toe of the slope with a decrease in the matric suction and shear strength in the surficial slope. (3) The rainfall intensity and initially matric suction have great influence on the safety factor of expansive subgrade slope.

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References

  • Allouche JP, Goldmakher L (2018) Mock characters and the Kronecker symbol. J Number Theory 192:356–372

    Article  Google Scholar 

  • Cheuk CY, Ng CWW, Sun HW (2005) Numerical experiments of soil nails in loose fill slopes subjected to rainfall infiltration effects. Comput Geotech 32:290–303

    Article  Google Scholar 

  • Ferber V, Auriol JC, Cui YL et al (2008) Wetting-induced volume changes in compacted silty clays and high-plasticity clays. Can Geotech J 45(2):252–265

    Article  Google Scholar 

  • Fredlund DG, Morgenstem NR, Widger RA (1978) The shear strength of unsaturated soils. Can Geotech J 15(3):313–321

    Article  Google Scholar 

  • Grime RE (1986) Clay Mineralogy. McGraw-Hill, New York

    Google Scholar 

  • Hou TS, Xu GL, Shen YJ, Wu ZZ et al (2013) Formation mechanism and stability analysis of the Houba expansive soil landslide. Eng Geol 161:34–43

    Article  Google Scholar 

  • Khan MS, Hossain S, Ahmed A et al (2016) Investigation of a shallow slope failure on expansive clay in Texas. Eng Geol 219:118–129

    Article  Google Scholar 

  • Kim SB, Yoo C (2008) Three-dimensional numerical investigation of multifaced tunneling in water-bearing soft ground. Can Geotech J 45(10):1467–1486

    Article  Google Scholar 

  • Miao XX, Lu AH, Mao XB et al (2002) Numerical simulation for roadways in swelling rock under coupling function of water and ground pressure. J China Univ Min Technol 12(2):120–125

    Google Scholar 

  • Ng CWW, Shi Q (1998) A Numerical Investigation of the Stability of Unsaturated Soil Slopes Subjected to Transient Seepage. Comput Geotech 22:1–28

    Article  Google Scholar 

  • Ng CWW, Zhan LT, Bao CG et al (2003) Performance of an unsaturated expansive soil slope subjected to artificial rainfall infiltration. Geotechnique 53(2):143–157

    Article  Google Scholar 

  • Pisano F, Prisco CD (2011) An exercise on slope stability and perfect elastoplasticity. Geotechnique 61(11):923–934

    Article  Google Scholar 

  • Qi SC, Vanapalli SK (2015) Hydro-mechanical coupling effect on surficial layer stability of unsaturated expansive soil slopes. Comput Geotech 70:68–82

    Article  Google Scholar 

  • Qi SC, Vanapalli SK (2016) Influence of swelling behavior on the stability of an infinite unsaturated expansive soil slope. Comput Geotech 76:154–169

    Article  Google Scholar 

  • Sun JC, Wang GQ, Dong XB et al (2007) Expansive model and back analysis of expansive soil. Rock Soil Mech 28(10):2055–2059 (in Chinese)

    Google Scholar 

  • Van Genuchten MT (1980) A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci Soc Am J 44(5):892–898

    Article  Google Scholar 

  • Vanapalli SK, Adem HH (2014) Elasticity moduli of expansive soils from dimensional analysis. Geotechnical Research 1(2):60–72

    Article  Google Scholar 

  • Villar MV, Lloret A (2008) Influence of dry density and water content on the swelling of a compacted bentonite. Appl Clay Sci 39(1):38–49

    Article  Google Scholar 

  • Wei WB, Cheng YM (2010) Soil nailed slope by strength reduction and limit equlibrium. Comput Geotech 37:602–618

    Article  Google Scholar 

  • Widger RA, Fredlund DG (1979) Stability of swelling clay embankments. Can Geotech J 16(1):140–151

    Article  Google Scholar 

  • Zhou YD, Tham LG, Yan RWM et al (2014) The mechanism of soil failures along cracks subjected to water infiltration. Comput Geotech 55(2):330–341

    Article  Google Scholar 

  • Zumrawi M, Mohammed AE (2019) Effects of poly vinyl acetate on characteristics of expansive soil. Eng Struct 6(2):167–176

    Google Scholar 

Download references

Acknowledgements

The contributions are gratefully acknowledged.

Funding

The described work is substantially supported by the National Natural Science Foundation of China (NSFC) (No. 51608316), the Department of Transportation of Shanxi Province (Nos. 15–2-08, 2017–1-20, and 2019–1-24), and the Shanxi Transportation Holdings Group CO., LTD (No. 19-JKKJ-23).

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Authors and Affiliations

  1. Shanxi Transportation Technology Research & Development Co., Ltd., Taiyuan, China

    Zhenshan Guo & Ziyang Zhao

  2. Key Laboratory of Highway Construction and Maintenance Technology in Loess Region, Taiyuan, China

    Zhenshan Guo & Ziyang Zhao

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  1. Zhenshan Guo
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  2. Ziyang Zhao
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Correspondence to Ziyang Zhao.

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Guo, Z., Zhao, Z. Numerical analysis of an expansive subgrade slope subjected to rainfall infiltration. Bull Eng Geol Environ 80, 5481–5491 (2021). https://doi.org/10.1007/s10064-021-02274-7

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  • DOI: https://doi.org/10.1007/s10064-021-02274-7

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