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

IF 2 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Frontiers in Earth Science Pub Date : 2024-08-27 DOI:10.3389/feart.2024.1470083

Weixin Yang, Yonggang Zhang, Lei Zhang, Gexue Bai, Baofeng Wan, Ning An

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引用次数: 0

Abstract

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.

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前沿 | 西北山区降雨和地震作用下滑坡稳定性和破坏机理的综合研究

中国西北山区滑坡地质灾害频发，严重威胁着当地人民的生命财产安全。本研究以丽江北山滑坡为典型案例，结合现场地质勘察成果，对滑坡进行了二维和三维数值模拟，评价了滑坡在自重、降雨和地震作用下的稳定性。通过分析滑坡的广义剪切应变、位移和稳定系数，确定滑坡在静态、降雨和地震条件下的稳定性呈下降趋势。滑坡在正常静力和降雨条件下表现出拉力控制破坏模式，在地震条件下表现出平移破坏模式。与静力和降雨条件相比，地震条件下滑坡的体积和滑动距离最大。结合传递系数法和简化 Bishop 法，对滑坡的稳定性进行了对比分析。结果发现，不同工况下的稳定系数与模拟结果一致，验证了模拟结果的可靠性。本文的研究成果将有助于阐明该类滑坡的发展机理，为西北山区滑坡的稳定性评价提供有价值的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Earth Science Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

3.50

自引率

10.30%

发文量

2076

审稿时长

12 weeks

期刊介绍： Frontiers in Earth Science is an open-access journal that aims to bring together and publish on a single platform the best research dedicated to our planet. This platform hosts the rapidly growing and continuously expanding domains in Earth Science, involving the lithosphere (including the geosciences spectrum), the hydrosphere (including marine geosciences and hydrology, complementing the existing Frontiers journal on Marine Science) and the atmosphere (including meteorology and climatology). As such, Frontiers in Earth Science focuses on the countless processes operating within and among the major spheres constituting our planet. In turn, the understanding of these processes provides the theoretical background to better use the available resources and to face the major environmental challenges (including earthquakes, tsunamis, eruptions, floods, landslides, climate changes, extreme meteorological events): this is where interdependent processes meet, requiring a holistic view to better live on and with our planet. The journal welcomes outstanding contributions in any domain of Earth Science. The open-access model developed by Frontiers offers a fast, efficient, timely and dynamic alternative to traditional publication formats. The journal has 20 specialty sections at the first tier, each acting as an independent journal with a full editorial board. The traditional peer-review process is adapted to guarantee fairness and efficiency using a thorough paperless process, with real-time author-reviewer-editor interactions, collaborative reviewer mandates to maximize quality, and reviewer disclosure after article acceptance. While maintaining a rigorous peer-review, this system allows for a process whereby accepted articles are published online on average 90 days after submission. General Commentary articles as well as Book Reviews in Frontiers in Earth Science are only accepted upon invitation.