High-speed long-runout landslide scraping and entrainment effects: A case study on Shuicheng landslide

IF 6.9 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
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引用次数: 0

Abstract

Erosion and entrainment significantly increase the volume and destructive potential of high-speed long-runout landslides. Previous studies seldom quantitatively address these effects, and even fewer incorporate the extent of slope weathering into the analysis of landslide dynamics. This study addressed this gap by developing a framework for dynamic analysis, combining Finite Element Method-Smoothed Particle Hydrodynamics-Finite Discrete Element Method (FEM-SPH-FDEM), and applying it to the Shuicheng landslide. Simulation results closely matched field data, revealing substantial sliding mass deviation and velocity variations influenced by rocky ridges and valleys. According to the simulation, the weathering degree of rock slope significantly affects landslide dynamic processes. The interparticle friction coefficient is crucial for accurately modeling these processes using the SPH-FDEM method. Additionally, by incorporating landslide erosion behavior into the framework, the case study indicates that the volume of landslides in Shuicheng County increased by approximately 0.6 times. Three stages of evolution mechanisms of high-altitude landslide-induced erosion behavior are proposed in this paper, highlighting the effectiveness of this framework in understanding landslide mechanisms and providing information for prevention strategies in high-altitude, highly weathered areas.

高速长距离滑坡的刮动和夹带效应:水城滑坡案例研究
侵蚀和夹带大大增加了高速长距离滑坡的体积和破坏潜力。以往的研究很少对这些影响进行定量分析,将边坡风化程度纳入滑坡动力学分析的研究更是少之又少。本研究针对这一空白,结合有限元法-平滑粒子流体力学-有限离散元法(FEM-SPH-FDEM),建立了动态分析框架,并将其应用于水城滑坡。模拟结果与现场数据密切吻合,显示出受岩脊和岩谷影响的巨大滑动质量偏差和速度变化。模拟结果表明,岩坡风化程度对滑坡动力过程有显著影响。颗粒间摩擦系数对于使用 SPH-FDEM 方法准确模拟这些过程至关重要。此外,通过将滑坡侵蚀行为纳入框架,案例研究表明水城县的滑坡体积增加了约 0.6 倍。本文提出了高海拔地区滑坡诱发侵蚀行为的三个阶段演化机制,凸显了该框架在理解滑坡机制方面的有效性,并为高海拔、高风化地区的预防策略提供了信息。
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来源期刊
Engineering Geology
Engineering Geology 地学-地球科学综合
CiteScore
13.70
自引率
12.20%
发文量
327
审稿时长
5.6 months
期刊介绍: Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.
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