中国两河口水库莫古岩滑坡在不同水位下产生的潜在冲击波的数值模拟

IF 5.8 2区 工程技术 Q1 ENGINEERING, GEOLOGICAL
Shizhuang Chen, Weiya Xu, Guike Zhang, Rubin Wang, Long Yan, Hailong Zhang, Huanling Wang
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引用次数: 0

摘要

水库蓄水和水位波动经常引发滑坡及其潜在的冲浪等次生灾害,严重威胁库区和坝区沿线群众的生命安全,造成经济损失甚至灾难性后果。本研究对莫谷岩体滑坡的工程地质条件和变形机制进行了全面的实地调查和监测。研究发现,蓄水池是诱发边坡变形的主要因素,滑动体的累积位移没有收敛迹象,显示出潜在的不稳定性。通过在 FLOW-3D 中耦合弹性-粘弹性模型和 RNG 湍流模型,在两河口水库坝区附近复制了一次实际的冲击波灾害,以验证数值方法的可靠性。在此基础上,建立了一个三维模型来计算莫谷岩体滑坡可能产生的冲击波,并对大坝的风险进行了评估。在不同的水位条件下,模拟脉冲波的上升高度均未超过大坝高程,显示出令人满意的安全系数。鉴于山体滑坡引发的波浪灾害的固有危险性,需要持续关注,并针对这些问题提出了预防措施和建议。此外,研究还探讨了水位波动对主要海啸振幅的贡献、对岸和大坝的最大冲高以及海啸振幅沿河道的衰减率。研究结果为全球类似水库滑坡和潜在滑坡引发的波浪的预警和预防提供了重要的参考价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Numerical simulation of potential impulse waves generated by the Mogu rock landslide at varying water levels in the Lianghekou Reservoir, China

Numerical simulation of potential impulse waves generated by the Mogu rock landslide at varying water levels in the Lianghekou Reservoir, China

Reservoir impoundment and water level fluctuations often trigger landslides and their secondary disasters, such as potential impulse waves, posing a serious threat to the safety of people along the reservoir and dam areas, causing economic losses and even catastrophic consequences. This study delves into a comprehensive field investigation and monitoring of the engineering geological conditions and deformation mechanisms of the Mogu rock landslide. The impoundment is identified as the primary factor inducing slope deformation, with the cumulative displacement of the sliding body showing no signs of convergence, indicating potential instability. By coupling the elasto-visco-plasticity model and the RNG turbulence model in FLOW-3D, an actual impulse wave disaster near the Lianghekou reservoir dam area is replicated to validate the reliability of the numerical method. Building upon this, a three-dimensional model is established to calculate potential impulse waves generated by the Mogu rock landslide, and the risk to the dam is evaluated. Under different water level conditions, the simulated run-ups of impulse waves do not surpass the dam elevation, demonstrating a satisfactory safety margin. Given the inherent danger of landslide-induced wave disasters, continuous attention is warranted, and preventive measures and suggestions are proposed to address these concerns. Additionally, the study explores the contributions of water level fluctuations to the primary tsunami amplitude, the maximum run-up on the opposite bank and the dam, and the attenuation rate of the tsunami amplitude along the river channel. The results provide significant reference values for the early warning and prevention of comparable reservoir landslides and potential landslide-induced waves worldwide.

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来源期刊
Landslides
Landslides 地学-地球科学综合
CiteScore
13.60
自引率
14.90%
发文量
191
审稿时长
>12 weeks
期刊介绍: Landslides are gravitational mass movements of rock, debris or earth. They may occur in conjunction with other major natural disasters such as floods, earthquakes and volcanic eruptions. Expanding urbanization and changing land-use practices have increased the incidence of landslide disasters. Landslides as catastrophic events include human injury, loss of life and economic devastation and are studied as part of the fields of earth, water and engineering sciences. The aim of the journal Landslides is to be the common platform for the publication of integrated research on landslide processes, hazards, risk analysis, mitigation, and the protection of our cultural heritage and the environment. The journal publishes research papers, news of recent landslide events and information on the activities of the International Consortium on Landslides. - Landslide dynamics, mechanisms and processes - Landslide risk evaluation: hazard assessment, hazard mapping, and vulnerability assessment - Geological, Geotechnical, Hydrological and Geophysical modeling - Effects of meteorological, hydrological and global climatic change factors - Monitoring including remote sensing and other non-invasive systems - New technology, expert and intelligent systems - Application of GIS techniques - Rock slides, rock falls, debris flows, earth flows, and lateral spreads - Large-scale landslides, lahars and pyroclastic flows in volcanic zones - Marine and reservoir related landslides - Landslide related tsunamis and seiches - Landslide disasters in urban areas and along critical infrastructure - Landslides and natural resources - Land development and land-use practices - Landslide remedial measures / prevention works - Temporal and spatial prediction of landslides - Early warning and evacuation - Global landslide database
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