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Slope Stability Analysis of Unsaturated Soil Slopes Based on the Site-Specific Characteristics: A Case Study of Hwangryeong Mountain, Busan, Korea

Author

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  • Sinhang Kang

    (School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea)

  • Seung-Rae Lee

    (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea)

  • Sung-Eun Cho

    (Department of Civil, Safety, and Environmental Engineering, Hankyong National University, Gyeonggi 17579, Korea)

Abstract

Shallow slope failures occur almost every year during the rainy season. Continuous observation of the meteorological parameters and hydrological characteristics is required to more clearly understand the triggering mechanisms of shallow slope failure. In addition, influential factors, such as type of relative permeability models, air flow, and variation of hydraulic conductivity associated with stress–strain behavior of soil, have significant effects on the actual mechanism of rainfall infiltration. Real-time data including hourly rainfall and pore water pressure in response to rainfall was recorded by devices; then, the change in pore pressure from the devices was compared to the results from the infiltration analysis with applications of three relative permeability models, air flow, and the coupled hydro-mechanical analysis to examine an appropriate site-specific approach to a rainfall infiltration analysis. The infiltration and stability analyses based on the site-specific hydrologic characteristics were utilized to create maps of safety factors that depend on the cumulative rainfall. In regions vulnerable to landslides, rainfall forecast information and safety factor maps built by applying various rainfall scenarios can be useful in preparing countermeasures against disasters during the rainy season.

Suggested Citation

  • Sinhang Kang & Seung-Rae Lee & Sung-Eun Cho, 2020. "Slope Stability Analysis of Unsaturated Soil Slopes Based on the Site-Specific Characteristics: A Case Study of Hwangryeong Mountain, Busan, Korea," Sustainability, MDPI, vol. 12(7), pages 1-21, April.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:7:p:2839-:d:340725
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    References listed on IDEAS

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    1. Sangseom Jeong & Kwangwoo Lee & Junghwan Kim & Yongmin Kim, 2017. "Analysis of Rainfall-Induced Landslide on Unsaturated Soil Slopes," Sustainability, MDPI, vol. 9(7), pages 1-20, July.
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    1. Joram Wachira Mburu & An-Jui Li & Horn-Da Lin & Chih-Wei Lu, 2022. "Investigations of Unsaturated Slopes Subjected to Rainfall Infiltration Using Numerical Approaches—A Parametric Study and Comparative Review," Sustainability, MDPI, vol. 14(21), pages 1-37, November.
    2. Shaoling Li & Chi Qiu & Jiankun Huang & Xiaoping Guo & Yucun Hu & Al-Shami Qahtan Mugahed & Jin Tan, 2022. "Stability Analysis of a High-Steep Dump Slope under Different Rainfall Conditions," Sustainability, MDPI, vol. 14(18), pages 1-18, September.
    3. Jing Luo & Xiangjun Pei & Ronghao Jiang & Tiantao Li & Hao Sun & Bo Jin & Qian Li, 2023. "The Characteristics and Seepage Stability Analysis of Toppling-Sliding Failure under Rainfall," Sustainability, MDPI, vol. 15(10), pages 1-17, May.

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