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Study on the Stability of Cut Slopes Caused by Rural Housing Construction in Red Bed Areas: A Case Study of Wanyuan City, China

Author

Listed:
  • Hailin He

    (State Key Laboratory of Geo-Hazard Prevention and Geo-Environmental Protection, Chengdu University of Technology, Chengdu 610059, China
    The 1st Geological Brigade of Sichuan, Chengdu 610072, China)

  • Xiujun Dong

    (State Key Laboratory of Geo-Hazard Prevention and Geo-Environmental Protection, Chengdu University of Technology, Chengdu 610059, China)

  • Simin Du

    (The 1st Geological Brigade of Sichuan, Chengdu 610072, China)

  • Hua Guo

    (The 1st Geological Brigade of Sichuan, Chengdu 610072, China)

  • Yue Yan

    (The 1st Geological Brigade of Sichuan, Chengdu 610072, China)

  • Guohui Chen

    (The 1st Geological Brigade of Sichuan, Chengdu 610072, China)

Abstract

The red beds that are widely distributed in hilly areas in eastern Sichuan Province are inevitable rock and soil masses in engineering construction. In order to obtain a larger building area, engineering slope cutting is quite common in red bed hilly areas. Engineering slope cutting destroys the inherent stability of a slope and causes geological disasters. In order to practice the concept of sustainable development and explore ways to develop and utilize land resources reasonably and reduce the possibility of geological disasters caused by engineering slope cutting, this paper took the slope cutting sites caused by rural housing construction in the red bed area of Wanyuan City as research objects. The internal and external factors affecting the stability of the cut slopes were summarized through a field investigation, and two typical slopes were selected for analysis. Sampling and indoor tests were conducted to obtain the geotechnical parameters. Geo Studio software (2018 R2) was employed to establish numerical models, simulate the stress and strain distributions, and compute stability coefficients under different slope cutting conditions at the same time. Based on field investigations and numerical simulations, the three main failure modes of shallow landslides caused by slope cutting were summarized, and the evolution process of slope landform accelerated by slope cutting activities was deduced. In an engineering application, the functional relationship between the cutting height and the stability coefficient was fitted. It was found that the critical cut height values of soil slope were 6.3 m, 6.2 m, 5.2 m, and 2.6 m at slope of 10°, 20°, 30° and 40°, respectively; the critical cut height values of rock–soil mixed slope were 9.3 m, 6.5 m, 5.9 m, and 2.2 m at slope of 10°, 20°, 30° and 40°, respectively. The research findings can be used to prevent and manage the hazards caused by slope cutting in this study area.

Suggested Citation

  • Hailin He & Xiujun Dong & Simin Du & Hua Guo & Yue Yan & Guohui Chen, 2024. "Study on the Stability of Cut Slopes Caused by Rural Housing Construction in Red Bed Areas: A Case Study of Wanyuan City, China," Sustainability, MDPI, vol. 16(3), pages 1-17, February.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:3:p:1344-:d:1333844
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    References listed on IDEAS

    as
    1. Tiesheng Yan & Jun Xiong & Longjian Ye & Jiajun Gao & Hui Xu, 2023. "Field Investigation and Finite Element Analysis of Landslide-Triggering Factors of a Cut Slope Composed of Granite Residual Soil: A Case Study of Chongtou Town, Lishui City, China," Sustainability, MDPI, vol. 15(8), pages 1-25, April.
    2. H. Wang & K. Sassa & W. Xu, 2007. "Analysis of a spatial distribution of landslides triggered by the 2004 Chuetsu earthquakes of Niigata Prefecture, Japan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 41(1), pages 43-60, April.
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