1.山地自然灾害与工程安全全国重点实验室(中国科学院、水利部成都山地灾害与环境研究所),四川 成都 610299
2.中国科学院大学,北京 100049
3.中巴地球科学联合研究中心,巴基斯坦伊斯兰堡
4.六盘水师范学院土木与规划学院,贵州 六盘水 553004
王彬(1993—),男,博士研究生。主要从事山地灾害防治等研究。E‑mail: sanshan.wangbin@outlook.com
苏立君(1976—),男,研究员,博导。主要从事山地灾害动力学及其防控等研究。E‑mail:sulijun1976@163.com
收稿:2024-10-24,
修回:2024-12-31,
纸质出版:2025-02-15
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王彬,苏立君,肖思友等.滑坡碎屑流对透过性柔性网的冲击动力特征研究[J].防灾减灾工程学报,2025,45(01):71-83.
WANG Bin,SU Lijun,XIAO Siyou,et al.Research on the Impact Dynamics Characteristics of Landslide Debris Flows on Permeable Flexible Barriers[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(01):71-83.
王彬,苏立君,肖思友等.滑坡碎屑流对透过性柔性网的冲击动力特征研究[J].防灾减灾工程学报,2025,45(01):71-83. DOI: 10.13409/j.cnki.jdpme.20241024006.
WANG Bin,SU Lijun,XIAO Siyou,et al.Research on the Impact Dynamics Characteristics of Landslide Debris Flows on Permeable Flexible Barriers[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(01):71-83. DOI: 10.13409/j.cnki.jdpme.20241024006.
柔性网是防治滑坡碎屑流的重要拦挡结构,其透过性对碎屑流冲击动力学特征尚未得到充分关注。基于离散元法,在不同来流Froude数和网径尺寸条件下,开展了碎屑流对透过性环形柔性网的冲击试验,建立了一种新型冲击力估算模型。结果表明:(1) 随着网径尺寸和Froude数的增加,流动层颗粒从柔性网中通过的概率增加,死区稳定性降低,共同提升了柔性网的透过性;(2) 当来流Froude数小于4时,碎屑流冲爬高度和冲击力对网径比并不敏感;在Froude数大于4后,随着柔性网对前端碎屑流透过能力增强,峰值冲击力时刻流动层直接传递到柔性网上的动量和死区的堆积质量降低,降低了流动层的冲击动力和死区的堆积静力;(3) 提出的分析模型可用于分析和估算碎屑流作用在透过性柔性网上的峰值冲击力。研究结果为柔性网的网径尺寸优化和结构设计提供了理论参考。
Flexible barriers are important barrier structures for preventing and controlling landslide debris flows
but its permeability's effect on the impact dynamics characteristics of debris flows has not been sufficiently studied. Based on the discrete element method (DEM)
impact tests of debris flows on permeable annular flexible barriers were conducted under different inflow Froude numbers and mesh sizes. A novel model for impact force estimation was then established. The results showed that: (1) as the mesh size and Froude number in-creased
the probability of flow layer particles passing through the flexible barriers increased and the stability of the dead zone decreased
collectively enhancing the permeability of the flexible barriers. (2) When the inflow Froude number was less than 4
the debris flow climbing height and impact force were not sensitive to the mesh size ratio. However
when the Froude number exceeded 4
as the per-meability of the flexible barriers to the front-end debris flow enhanced
the momentum directly transferred from the flow layer to the flexible barriers and the accumulated mass in the dead zone at the peak impact moment decreased
thereby reducing the hydro-dynamic impact force of the flow layer and the hydro-static impact force of accumulation in the dead zone. (3) The proposed analysis model could be used to analyze and estimate the peak impact force of debris flows on permeable flexible barriers. The research findings provide theo-retical guidance for mesh size optimization and structural design of the flexible barriers.
Stoffel M , Trappmann D G , Coullie M I , et al . Rockfall from an increasingly unstable mountain slope driven by climate warming [J]. Nature Geoscience , 2024 , 17 ( 3 ): 249 ‑ 254 .
许强 , 李为乐 , 董秀军 , 等 . 四川茂县叠溪镇新磨村滑坡特征与成因机制初步研究 [J]. 岩石力学与工程学报 , 2017 , 36 ( 11 ): 2612 ‑ 2628 .
Xu Q , Li W L , Dong X J , et al . The Xinmocun landslide on June 24,2017 in Maoxian,Sichuan:characteristics and failure mechanism [J]. Chinese Journal of Rock Mechanics and Engineering , 2017 , 36 ( 11 ): 2612 ‑ 2628 . (in Chinese)
Zhao L , Zhang L , Yu Z , et al . A case study on the energy capacity of a flexible rockfall barrier in resisting landslide debris [J]. Forests , 2022 , 13 ( 9 ): 1384 .
肖思友 , 覃超 , 李殿鑫 , 等 . 碎屑流被动柔性防护网的结构与安装特征研究 [J]. 地下空间与工程学报 , 2021 , 17 ( 增2 ): 1051 ‑ 1060 .
Xiao S Y , Qin C , Liu D X , et al . Structure and illustration of flexible barriers against a granular flow [J]. Chinese Journal of Underground Space and Engineering , 2021 , 17 ( Sup2 ): 1051 ‑ 1060 . (in Chinese)
肖思友 , 苏立君 , 姜元俊 , 等 . 柔性网结构对碎屑流冲击力学特征的影响研究 [J]. 岩石力学与工程学报 , 2022 , 41 ( 12 ): 2473 ‑ 2484 .
Xiao S Y , Su L J , Jiang Y J , et al . Investigation on impact characteristics of granular flow against different structures of flexible barriers [J]. Chinese Journal of Rock Mechanics and Engineering , 2022 , 41 ( 12 ): 2473 ‑ 2484 . (in Chinese)
Choi C E , Goodwin G R . Interaction between granular flows and flexible obstacles: A grain‑scale investigation [J]. Computers and Geotechnics , 2020 , 128 : 103800 .
Song D R , Ng C W W , Choi C E , et al . Influence of debris flow solid fraction on rigid barrier impact [J]. Canadian Geotechnical Journal , 2017 , 54 ( 10 ): 1421 ‑ 1434 .
Song D R , Zhou G G D , Choi C E , et al . Debris flow impact on flexible barrier: effects of debris‑barrier stiffness and flow aspect ratio [J]. Journal of Mountain Science , 2019 , 16 ( 7 ): 1629 ‑ 1645 .
Liu C , Yu Z , Zhao S . Quantifying the impact of a debris avalanche against a flexible barrier by coupled DEM‑FEM analyses [J]. Landslides , 2020 , 17 ( 1 ): 33 ‑ 47 .
Geobrugg . Protection systems against natural hazards [EB/OL]. ( 2012‑06‑06 )[ 2025‑01‑21 ]. https:∥www.youtube.com/watch?v=LUUeBRZ-lOg https://www.youtube.com/watch?v=LUUeBRZ-lOg .
余志祥 , 骆泓锦 , 张丽君 , 等 . 考虑透水效应的泥石流柔性防护网耦合分析方法 [J]. 岩土工程学报 , 2024 , 46 ( 8 ): 1695 ‑ 1702 .
Yu Z X , Luo H J , Zhang L J , et al . Coupling analysis method for flexible debris flow barriers considering water blocking and permeability effects [J]. Chinese Journal of Geotechnical Engineering , 2024 , 46 ( 8 ): 1695 ‑ 1702 . (in Chinese)
Wendeler C , Volkwein A . Laboratory tests for the optimization of mesh size for flexible debris‑flow barriers [J]. Natural Hazards and Earth System Sciences , 2015 , 15 ( 12 ): 2597 ‑ 2604 .
Tan D , Feng W , Yin J , et al . Numerical study of retention efficiency of a flexible barrier in mitigating granular flow comparing with large‑scale physical modeling test data [J]. Acta Geotechnica , 2021 , 16 ( 2 ): 433 ‑ 448 .
Tan D Y , Yin J H , Feng W Q , et al . New simple method for measuring impact force on a flexible barrier from rockfall and debris flow based on large‑scale flume tests [J]. Engineering Geology , 2020 , 279 : 105881 .
肖思友 , 苏立君 , 姜元俊 , 等 . 坡度对碎屑流冲击立式拦挡墙力学特征的影响 [J]. 岩土力学 , 2019 , 40 ( 11 ): 4341 ‑ 4351,4360 .
Xiao S Y , Su L J , Jiang Y J , et al . Influence of slope on the mechanical properties of dry granular flow impacting on the vertical retaining wall [J]. Rock and Soil Mechanics , 2019 , 40 ( 11 ): 4341 ‑ 4351,4360 . (in Chinese)
Jiang Y J , Towhata I . Experimental study of dry granular flow and impact behavior against a rigid retaining wall [J]. Rock Mechanics and Rock Engineering , 2013 , 46 ( 4 ): 713 ‑ 729 .
Shenandoah , Debris Flow Barrier [EB/OL].[ 2024-10-23 ]. https:∥www.geovert.com/gedp-past-projects/shenandoah/debris-flow-barrier https://www.geovert.com/gedp-past-projects/shenandoah/debris-flow-barrier .
Wendeler C . Debris‑flow protection systems for mountain torrents: basics principles for planning and calculation of flexible barriers [M]. WSL Ber . 44 : 279 , 2016 .
Goodwin S R , Choi C E . Slit structures: Fundamental mechanisms of mechanical trapping of granular flows [J]. Computers and Geotechnics , 2020 , 119 : 103376 .
Choi C E , Ng C W W , Au‑Yeung S C H , et al . Froude characteristics of both dense granular and water flows in flume modelling [J]. Landslides , 2015 , 12 ( 6 ): 1197 ‑ 1206 .
Faug T . Depth‑averaged analytic solutions for free‑surface granular flows impacting rigid walls down inclines [J]. Physical Review E , 2015 , 92 ( 6 ): 062310 .
高杨 , 殷跃平 , 李滨 , 等 . 考虑颗粒状态转化的高位远程滑坡数值模拟方法 [J]. 岩石力学与工程学报 , 2023 , 42 ( 7 ): 1623 ‑ 1637 .
Gao Y , Yin Y P , Li B , et al . Numerical simulation method of high‑position and long runout landslide under granular state transformation [J]. Chinese Journal of Rock Mechanics and Engineering , 2023 , 42 ( 7 ): 1623 ‑ 1637 . (in Chinese)
Savage S B , Hutter K . The motion of a finite mass of granular material down a rough incline [J]. Journal of Fluid Mechanics , 1989 , 199 ( 1 ): 177 ‑ 215 .
Hu K H , Wei F Q , Li Y . Real‑time measurement and preliminary analysis of debris‑flow impact force at Jiangjia Ravine, China [J]. Earth Surface Processes and Landforms , 2011 , 36 ( 9 ): 1268 ‑ 1278 .
Tan D Y , Yin J H , Feng W Q , et al . Large‑scale physical modelling study of a flexible barrier under the impact of granular flows [J]. Natural Hazards and Earth System Sciences , 2018 , 18 ( 10 ): 2625 ‑ 2640 .
Zhu Y , Jiang Y , Liu Y , et al . Material characteristic-controlled particle segregation in rock‑ice avalanche [J]. Computers and Geotechnics , 2024 , 171 : 106367 .
Gray J M N T . Particle segregation in dense granular flows [J]. Annual Review of Fluid Mechanics , 2018 , 50 ( 1 ): 407 ‑ 433 .
柳春 . 柔性防护结构坡面地质灾害作用的离散化分析理论与方法 [D]. 成都 : 西南交通大学 , 2020 .
Liu C . Theory and method of discrete analysis for flexible protective structure against geological hazard on shallow slope [D]. Chengdu : Southwest Jiaotong University , 2020 . (in Chinese)
胡芹龙 . 川西地区地质灾害防治工程效果评价研究 [D]. 成都 : 成都理工大学 , 2020 .
Hu Q L . study on evaluation of engineering effect of geological disaster prevention and control in western sichuan [D]. Chengdu : Chengdu University of Technology , 2020 . (in Chinese)
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