Damage mechanism and mode of high arch dam under direct landslide impact

LUO Jinliang; WANG Gaohui; QI Zhiyong; MAO Yanpian; Dong Shun; DOU Xuhuang

doi:10.14188/j.1671-8844.2024.0240

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Damage mechanism and mode of high arch dam under direct landslide impact

更新时间：2026-10-15

- Damage mechanism and mode of high arch dam under direct landslide impact
- Engineering Journal of Wuhan University Pages: 1-12(2026)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.14188/j.1671-8844.2024.0240
  CLC： TV312
- Online First：15 October 2026，
- 稿件说明：
移动端阅览
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：

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.

摘要

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。

Abstract

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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references

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