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ORIGINAL RESEARCH article

Front. Earth Sci.
Sec. Geohazards and Georisks
Volume 12 - 2024 | doi: 10.3389/feart.2024.1470083
This article is part of the Research Topic Failure Analysis and Risk Assessment of Natural Disasters Through Machine Learning and Numerical Simulation: Volume IV View all 5 articles

Comprehensive study on the stability and failure mechanism of landslides under rainfall and earthquake in northwest mountainous areas

Provisionally accepted
Weixin Yang Weixin Yang 1Yonggang Zhang Yonggang Zhang 2*Lei Zhang Lei Zhang 3Gexue Bai Gexue Bai 1Baofeng Wan Baofeng Wan 1Ning An Ning An 1
  • 1 Gansu Institute of Engineering Geology, Lanzhou, China
  • 2 Engineering Research Institute, China Construction Eighth Engineering Division Corp., Ltd., shanghai, China
  • 3 Yunnan Institute of Water & Hydropower Engineering Investigation, Design and Research, kunming, China

The final, formatted version of the article will be published soon.

    Landslides and geological disasters occur frequently in the mountainous areas of northwest China, seriously threatening people's life and property of the region. In this study, we investigated the Lijie Beishan landslide as a typical case and combines the results of on-site geological surveys to conduct two-dimensional and three-dimensional numerical simulations of the landslide, evaluating its stability under self-weight, rainfall, and earthquake action. By analyzing the generalized shear strain, displacement, and stability coefficient of the landslide, it is determined that the stability of the landslide shows a decreasing trend under static, rainfall, and earthquake conditions. Landslides exhibit tension controlled failure modes under normal static and rainfall conditions, and translational failure modes under earthquake conditions. Compared with static and rainfall conditions, landslides have the largest volume and sliding distance under earthquake conditions. By combining the transfer coefficient method and the simplified Bishop method, a comparative analysis was conducted on the stability of the landslide. It was found that the stability coefficients under different working conditions were consistent with the simulation results, which verified the reliability of the simulation results. The research results of this paper will assist in clarifying the development mechanism of this type of landslides and provide valuable references for the stability evaluation of landslides in the northwest mountainous areas.

    Keywords: rainfall, earthquake, landslide, numerical simulation, stability

    Received: 25 Jul 2024; Accepted: 27 Aug 2024.

    Copyright: © 2024 Yang, Zhang, Zhang, Bai, Wan and An. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Yonggang Zhang, Engineering Research Institute, China Construction Eighth Engineering Division Corp., Ltd., shanghai, China

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