Study on Landslide Stability and Refined Risk Assessment of Taijiapo, Xinchang Village, Zhongping Town, Qianxi County, Guizhou Province
Journal: Architecture Engineering and Science DOI: 10.32629/aes.v6i3.4235
Abstract
This study, based on detailed geological disaster investigation and quantitative risk assessment techniques, takes the Taijiapo landslide in Xinchang Village, Zhongping Town, Qianxi County as the research object. Through engineering geological mapping, drilling, geophysical prospecting, and numerical simulation, the formation mechanism and risk characteristics of landslides in the red-bed area are revealed. The results show that the landslide is an extra-large, medium-layer translational rock–soil mixed landslide, with a volume of approximately 3.6 million m³ and a main sliding direction of 5°–10°; the sliding zone is the contact surface between silty clay and bedrock, with low shear strength (saturated state c = 12 kPa, φ = 8°); under heavy rainfall conditions, the stability coefficient drops to 1.03–1.08, indicating a state of critical instability. Dynamic simulation based on the MassFlow model predicts a maximum sliding distance of 292 m, threatening 600 m of road. The study establishes a quantitative risk assessment system of “geological mechanism–stability–vulnerability,” providing a theoretical basis for the prevention and control of red-bed landslides.
Keywords
red-bed landslide; MassFlow simulation; risk zoning; northwest Qianxi
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[13] ZHOU Qi, XU Qiang, ZHOU Shu, et al. Movement process of abrupt loess flowslide based on numerical simulation—a case study of Chenjia 8# on the Heifangtai Terrace[J]. Mountain Research, 2019, 37(04): 528-537. (in Chinese)
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[16] XU Q, LI H, HE Y, et al. Comparison of data-driven models of loess landslide runout distance estimation[J]. Bulletin of Engineering Geology and the Environment, 2019, 78(2): 1281-1294.
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