1.武汉大学水资源工程与调度全国重点实验室,湖北武汉430000
2.湖北省智慧水电技术创新中心,湖北武汉430000
3.中国长江电力股份有限公司,湖北武汉430072
王高辉,男,博士,教授,主要从事极端荷载作用下高坝结构安全分析,E-mail: wanggaohui@whu.edu.cn.
网络首发:2026-10-15,
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罗金良, 王高辉, 齐智勇, 等. 滑坡直接冲击下高拱坝破坏机理与模式[J/OL]. 武汉大学学报(工学版), 2026,1-12.
LUO Jinliang, WANG Gaohui, QI Zhiyong, et al. Damage mechanism and mode of high arch dam under direct landslide impact[J/OL]. Engineering Journal of Wuhan University, 2026, 1-12.
罗金良, 王高辉, 齐智勇, 等. 滑坡直接冲击下高拱坝破坏机理与模式[J/OL]. 武汉大学学报(工学版), 2026,1-12. DOI: 10.14188/j.1671-8844.2024.0240.
LUO Jinliang, WANG Gaohui, QI Zhiyong, et al. Damage mechanism and mode of high arch dam under direct landslide impact[J/OL]. Engineering Journal of Wuhan University, 2026, 1-12. DOI: 10.14188/j.1671-8844.2024.0240.
在地震、降雨及水库蓄水等因素作用下高拱坝边坡容易失稳形成滑坡,滑坡直接冲击作用于高拱坝及其泄水建筑物,会对大坝结构造成一定程度的破坏毁伤。为了研究并揭示高拱坝在滑坡冲击作用下的损伤模式和机理,基于高拱坝模型试验建立滑坡体-拱坝-地基-库水三维耦合模型,利用SPH粒子模拟滑坡体冲击破碎及分散过程,并运用“分区分块”方法来描述滑坡体特性,采用声固耦合法模拟库水的动态作用行为,从而分析了滑坡冲击拱坝右岸坝肩顶部及泄水孔顶部平台两个重要部位的作用过程及损伤发展过程,阐明了高拱坝在滑坡直接冲击作用下不同部位的破坏模式,探讨了滑坡体积及速度因素对冲击作用的影响。研究表明,滑坡体冲击作用下坝肩主要发生压裂破碎、泄水孔平台主要发生冲切破坏、闸门桥墩发生倾倒破坏、泄水建筑物发生拉剪破坏;泄水孔顶部平台抗冲击能力比拱坝坝肩顶部弱。
The rock of the slope of the high arch dam is easily destabilized by earthquake
rainfall and water storage in the reservoir to form landslides
landslides directly impact on the high arch dam and its spillway building
causing a certain degree of damage to the dam structure. Therefore
in order to investigate and reveal the damage mode and mechanism of high arch dams under the impact of landslides
a three-dimensional numerical coupling model of arch dam-landslide-foundation-reservoir water is established based on high arch dam model testing
the SPH particles are used to simulate the impact crushing and dispersion process of the landslide body
the "subdivided block" method is used to describe the characteristics of the landslide
and the acoustic-solid coupling method is used to simulate the dynamic behavior of the reservoir water
this paper analyses the process of landslide impact on two important parts of the arch dam
the right bank shoulder and the top platform of the spillway hole
and elucidates the damage modes of different parts of high arch dams under the direct impact of landslides
and explores the influence of landslide volume and velocity factors on the impact. The results show that under the impact of landslide
the shoulder of the dam is mainly fractured and broken
the platform of the spillway hole is mainly damaged by scouring and cutting
the gate abutment is damaged by tipping
and the spillway building is damaged by pulling and shearing; and the platform on the top of the spillway hole has a weaker impact resistance than the top of the shoulder of the arch dam.
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