Stability and risk assessment of Nanqiao landslide based on FLAC3D and Monte Carlo method

Jiacheng Ma; Heping Shu; Jinzhu Ma; Gang Wang

doi:10.1117/12.2619472

22 December 2021 Stability and risk assessment of Nanqiao landslide based on FLAC3D and Monte Carlo method

Jiacheng Ma, Heping Shu, Jinzhu Ma, Gang Wang

Proceedings Volume 12058, Fifth International Conference on Traffic Engineering and Transportation System (ICTETS 2021); 120583N (2021) https://doi.org/10.1117/12.2619472
Event: 5th International Conference on Traffic Engineering and Transportation System (ICTETS 2021), 2021, Chongqing, China

Abstract

FLAC3D, Monte Carlo and transfer coefficient method are used to evaluate the stability and risk of Nanqiao landslide in Zhouqu of Gansu Province. The results show that the bottom of Nanqiao landslide has a large displacement in the horizontal direction, with the maximum displacement of 1.51e-002; the rear has a displacement in the vertical direction, the maximum displacement is 7.50e-003. The landslide is in a stable state under natural conditions, with a stability coefficient of 1.46; it remains basically stable under rainstorm conditions, with a stability coefficient of 1.139. It begins to become instable under earthquake conditions, with a stability coefficient of 0.911; it is in an instable state under earthquake and rainstorm conditions, with a stability coefficient of 0.711. The sensitivity order of landslide stability factors is cohesion greater than internal friction angle greater than soil weight. Nanqiao landslide has a high risk under rainstorm condition, with an annual failure probability of 1.7%; it has high risk under earthquake condition, with an annual failure probability of 6.2%; it has medium risk under rainstorm and earthquake condition, with an annual failure probability of 0.37%.

Citation Download Citation

Jiacheng Ma, Heping Shu, Jinzhu Ma, and Gang Wang "Stability and risk assessment of Nanqiao landslide based on FLAC3D and Monte Carlo method", Proc. SPIE 12058, Fifth International Conference on Traffic Engineering and Transportation System (ICTETS 2021), 120583N (22 December 2021); https://doi.org/10.1117/12.2619472

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