Dynamic stability analysis of anchored anti-dip slope under the Ludian earthquake: a case study of the Manhekuan slope, Yunnan, China

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-05 DOI:10.1007/s10064-024-03904-6

Shanbai Wu, Liangqing Wang, Qiong Wu, Jianlin Tian, Linfeng Zhu, Zihao Sun, Luobin Zheng, Chenlu Wang

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Abstract

A quantitative assessment of the seismic stability of anchored anti-dip slopes is of great importance for the safety of residents and infrastructure in seismically active regions. However, the subject has received relatively little scientific attention globally. This study aims to analyze the dynamic stability of an anchored anti-dip slope during the Ludian earthquake in Yunnan Province, China, a region characterized by active faults and frequent strong earthquakes. The Manhekuan slope located near the Lancang River fault, an active fault in Yunnan Province, was chosen as a case study to propose a method that integrates engineering geological investigations with the discrete element method (DEM). To validate its effectiveness, the proposed method is compared with the pseudo-static method and subsequently applied to optimize the anchorage parameters of the Manhekuan slope. The results indicate that the stability factor achieved by the proposed method is slightly higher than that of the pseudo-static method, showing a 3.6% increase. The proposed method effectively describes the shear evolution characteristics of the anchor cable and its influence on the seismic dynamic stability of the anchored anti-dip slope. The dynamic stability of the Manhekuan slope under the Ludian earthquake is reasonably analyzed using three indices: stability factor, geological body displacement, and anchorage force. This analysis leads to the determination of optimal anchorage parameters for the Manhekuan slope. The findings provide a valuable reference for evaluating the seismic stability of anchored slope engineering in seismically active regions, including the Himalayas.

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鲁甸地震下锚固抗倾覆边坡的动力稳定性分析：中国云南漫河川边坡案例研究

对锚固抗倾覆斜坡的抗震稳定性进行定量评估，对地震活跃地区居民和基础设施的安全至关重要。然而，这一课题在全球范围内受到的科学关注相对较少。本研究旨在分析中国云南省鲁甸地震期间锚固反斜坡的动态稳定性，该地区断层活跃，强震频发。研究选择了位于云南省活动断层澜沧江断层附近的漫河川边坡作为案例，提出了一种将工程地质调查与离散元法（DEM）相结合的方法。为了验证该方法的有效性，将所提出的方法与伪静力法进行了比较，随后将其用于优化漫河川边坡的锚固参数。结果表明，拟议方法获得的稳定系数略高于伪静力法，提高了 3.6%。所提出的方法有效地描述了锚索的剪切演化特征及其对锚固抗倾覆边坡地震动力稳定性的影响。利用稳定系数、地质体位移和锚固力三个指标，合理分析了鲁甸地震下漫河关边坡的动态稳定性。通过分析，确定了漫河川边坡的最佳锚固参数。研究结果为包括喜马拉雅山在内的地震活跃地区锚固边坡工程的抗震稳定性评估提供了有价值的参考。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.