降雨型滑坡流滑冲击缝隙坝的力学行为及坝体角度优化研究

doi:10.3799/dqkx.2026.211

降雨型滑坡流滑冲击缝隙坝的力学行为及坝体角度优化研究

doi: 10.3799/dqkx.2026.211

1. 贵州民族大学建筑工程学院, 贵州贵阳 550025;
2. 中国科学院、水利部成都山地灾害与环境研究所山地自然灾害与工程安全重点实验室, 成都 610299;
3. 同济大学土木工程学院, 上海 200092

基金项目:

国家重点研发计划(NO.2024YFC3012601)

国家自然科学基金项目(Nos.42507271

Nos.42367023)

四川省科技赋能防灾减灾“揭榜挂帅”项目(2025YFNH0009)

详细信息

作者简介:
陈冲冲(2001-),男,硕士研究生,主要从事山地灾害防治研究。E-mail:ccc42452021@163.com.ORCID:0009-0004-3786-5777

通讯作者:
周书(1994-),男,助理研究员,主要从事滑坡、泥石流等山地灾害致灾机制与数值模拟研究。E-mail:shuzhou@imde.ac.cn

中图分类号: P694
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出版历程
- 收稿日期: 2026-02-04
- 网络出版日期: 2026-08-25

Study on Mechanical Behavior of Rainfall-triggered Landslides Impacting Slit Dam and Optimization of Dam Angles

1. School of Civil Engineering and Architecture, Guizhou Minzu University, Guiyang 550025, China;
2. Key Laboratory of Mountain Hazards and Engineering Resilience/Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, China;
3. College of Civil Engineering, Tongji University, Shanghai 200092, China

摘要

摘要: 沟道地形和缝隙坝构型的组合导致了复杂多变的坝体角度。然而，目前坝体角度对降雨型滑坡流滑冲击缝隙坝的影响还未得到深入地研究。为此，本文采用离散元法（DEM），分析了不同坝体角度和相对缝隙开口下，降雨型滑坡流滑冲击缝隙坝的动力过程。研究结果表明：（1）随着坝体角度增加，碎屑颗粒爬升的高度降低，坝脚“死区”的形成速率加快。（2）不同相对缝隙开口下，坝体所受最大法向冲击力随坝体角度增大呈先减小后显著上升趋势，其中坝体角度由90°增至120°时法向冲击力均提升约10%、动力冲击系数α均提高约20%，而切向冲击力则随坝体角度增大持续减小。（3）在同一相对缝隙开口下，缝隙坝对滑坡碎屑的拦截率和能量耗散效率随坝体角度增大而升高，质量流量则随之降低。（4）结合缝隙坝的拦截效率及承灾体受力分析表明，在不同相对缝隙开口（s3、s4和s5）条件下，坝体角度为60°时，缝隙坝均能避免库容快速淤满，同时保障承灾体受力较小，综合调控能力最优。研究成果可为防灾减灾工程中缝隙坝的优化设计提供理论支撑。
- 降雨型滑坡 /
- 缝隙坝 /
- 坝体角度 /
- 离散元法 /
- 冲击特性
Abstract: The combination of gully terrain and slit dam configuration gives rise to highly variable dam angles. However, the influence of dam angle on the impact of rainfall-triggered landslides on slit dam has not been thoroughly investigated. To address this issue, the discrete element method (DEM) was adopted in this study to analyze the dynamic processes of rainfall-triggered landslides impacting slit dam under different dam angles and relative slit openings. The results show that: (1) As the dam angle increases, the run-up height of debris particles decreases, while the formation rate of the dead zone accelerates. (2) Under different relative slit sizes, the maximum normal impact force on the dam first decreases and then increases significantly with the increase of dam angle. When the dam angle increases from 90° to 120°, the normal impact force increases by approximately 10%, and the dynamic impact coefficient α increases by about 20%, while the tangential impact force decreases continuously with the increase of dam angle. (3) For the same relative slit opening, the grain-trapping efficiency of slit dam for landslide debris and the energy dissipation efficiency increase with the rise of dam angle, whereas the mass flow rate decreases accordingly. (4) A comprehensive analysis of the grain-trapping efficiency of the slit dam and the force on the downstream structure indicates that, under different relative slit sizes (s3, s4, and s5), a dam angle of 60° enables the slit dam to avoid rapid siltation of its storage capacity while ensuring a relatively small force on the downstream structure, achieving the optimal comprehensive regulation performance. The research findings can provide theoretical support for the optimal design of slit dams in disaster prevention and mitigation engineering.
- Rainfall-triggered Landslides /
- Slit dam /
- Dam angle /
- Discrete element method /
- Impact characteristics

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参考文献(39)

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降雨型滑坡流滑冲击缝隙坝的力学行为及坝体角度优化研究

doi: 10.3799/dqkx.2026.211

作者简介:
陈冲冲(2001-),男,硕士研究生,主要从事山地灾害防治研究。E-mail:ccc42452021@163.com.ORCID:0009-0004-3786-5777

通讯作者:
周书(1994-),男,助理研究员,主要从事滑坡、泥石流等山地灾害致灾机制与数值模拟研究。E-mail:shuzhou@imde.ac.cn

计量

Study on Mechanical Behavior of Rainfall-triggered Landslides Impacting Slit Dam and Optimization of Dam Angles

计量

目录

留言板

降雨型滑坡流滑冲击缝隙坝的力学行为及坝体角度优化研究

doi: 10.3799/dqkx.2026.211

作者简介: 陈冲冲(2001-),男,硕士研究生,主要从事山地灾害防治研究。E-mail:ccc42452021@163.com.ORCID:0009-0004-3786-5777

通讯作者: 周书(1994-),男,助理研究员,主要从事滑坡、泥石流等山地灾害致灾机制与数值模拟研究。E-mail:shuzhou@imde.ac.cn

计量

出版历程

Study on Mechanical Behavior of Rainfall-triggered Landslides Impacting Slit Dam and Optimization of Dam Angles

计量

出版历程

目录

作者简介:
陈冲冲(2001-),男,硕士研究生,主要从事山地灾害防治研究。E-mail:ccc42452021@163.com.ORCID:0009-0004-3786-5777

通讯作者:
周书(1994-),男,助理研究员,主要从事滑坡、泥石流等山地灾害致灾机制与数值模拟研究。E-mail:shuzhou@imde.ac.cn