柔性网结构对碎屑流冲击力学特征的影响研究

doi:10.13722/j.cnki.jrme.2022.0183

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Abstract Flexible barriers have been widely used for the mitigation of nature hazards including rockfall and granular flow. In practice，the empirical coefficient method is usually used for designing the flexible barriers without the consideration of the structure characteristics. In this study，the effects of the number of the cable，the type of the main mesh，the installation of the auxiliary mesh and the installation of the energy dissipator on the impact characteristics of the granular flow against the flexible barrier were revealed using the physical flume tests and the Discrete Element Method(DEM). The results shows that the increase in the number of the horizontal cable has less effects on the decrease in the maximum tensile force of the cables if the lateral cables are installed. The geometry of the mesh grid is an important index for estimating the large deformation of the flexible barrier. The changes in the geometries of the mesh grids are the main cause of the large deformation of the flexible barrier，rather than the deformation of the mesh material. The installation of the auxiliary mesh has less effects on the maximum tensile force of the flexible barrier if the ratio of the particles passing through the mesh is less than 10%. The installation of the energy dissipators can not only decrease the maximum tensile load of the cables，but also change the load transmission between the cables.

Key words： disaster geology granular flow flexible barrier impact large deformation DEM

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	Articles by authors
	XIAO Siyou1
	2
	SU Lijun3
	JIANG Yuanjun3
	WEI Zhongju2

Cite this article:

XIAO Siyou1,2,SU Lijun3, et al. Investigation on impact characteristics of granular flow against different structures of flexible barriers[J]. , 2022, 41(12): 2473-2484.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0183 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I12/2473

[1] 崔鹏，胡凯衡，陈华勇，等. 丝绸之路经济带自然灾害与重大工程风险[J]. 科学通报，2018， 63(11)：17–25.(CUI Peng，HU Kaiheng，CHEN Huayong，et al. Risks along the Silk Road Economic Belt owing to natural hazards and construction of major projects[J]. Chinese Science Bulletin，2018， 63(11)：17–25.(in Chinese)) [2] 李秀珍，钟卫，张小刚，等. 川藏交通廊道滑坡崩塌灾害对道路工程的危害方式分析[J]. 工程地质学报，2017，(5)：1 245–1 251. (LI Xiuzhen，ZHONG Wei，ZHANG Xiaogang，et al. Hazard ways of landslides and avalanches on road engineering in Sichuan—Tibet traffic corridor[J]. Journal of Engineering Geology，2017，(5)： 1 245–1 251.(in Chinese)) [3] 刘成清，许城杰，陈鑫，等. 泥石流柔性防护系统破坏原因分析与设计对策[J]. 水利与建筑工程学报，2017，15(5)：1–11.(LIU Chengqing，XU Chenjie，CHEN Xin，et al. Failure cause analysis and countermeasures design of flexible debris flow protection system[J]. Journal of Water Resources and Architectural Engineering，2017，15(5)：1–11.(in Chinese)) [4] YU Z X，ZHAO L，LIU Y P，et al. Studies on flexible rockfall barriers for failure modes，mechanisms and design strategies：a case study of Western China[J]. Landslides，2019，16(2)：343–362. [5] 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)：2 099–2 118. [6] TAN D Y，YIN J H，FENG W Q，et al. New simple method for calculating impact force on flexible barrier considering partial muddy debris flow passing through[J]. Journal of Geotechnical and Geoenvironmental Engineering，2019，145(9)：04019051. [7] XIAO S Y，SU L J，JIANG Y J，et al. Experimental investigation on impact force of dry granular flow impacting on the flexible barrier[J]. Landslides，2020，(17)：1 465–1 483. [8] 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)：1 051–1 060. (XIAO Siyou，QIN Chao，LI Dianxin，et al. Structure and illustration of flexible barriers against a granular flow[J]. Chinese Journal of Underground Space and Engineering，202，17(Supp.2)：1 051–1 060. (in Chinese)) [9] CUI P，ZENG C，LEI Y. Experimental analysis on the impact force of viscous debris flow[J]. Earth Surface Processes and Landforms，2015，40(12)：1 644–1 655. [10] JIANG R，FEI W P，ZHOU H W，et al. Experimental and numerical study on the load and deformation mechanism of a flexible net barrier under debris flow impact[J]. Bulletin of Engineering Geology and the Environment，2020，79：2 213–2 233. [11] SONG D，CHOI C E，NG C W W，et al. Geophysical flows impacting a flexible barrier：effects of solid-fluid interaction[J]. Landslides，2018，15(1)：99–110. [12] SONG D，ZHOU G G，XU M，et al. Quantitative analysis of debris-flow flexible barrier capacity from momentum and energy perspectives[J]. Engineering Geology，2019，251：81–92. [13] LIU D C，YOU Y，LIU J F，et al. Spatial-temporal distribution of debris flow impact pressure on rigid barrier[J]. Journal of Mountain Science，2019，16(4)：793–805. [14] LI X Y，ZHAO J D. A unified CFD-DEM approach for modeling of debris flow impacts on flexible barriers[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2018，42(14)：1 643–1 670. [15] LI X Y，ZHAO J D，SOGA K. A new physically-based impact model for debris flow[J]. Geotechnique，2020，71(8)：1–41. [16] SHEN W G，ZHAO T，ZHAO J D，et al. Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses[J]. Engineering Geology，2018，214(26)：86–96. [17] WENDELER C，VOLKWEIN A，MCARDELL B W，et al. Load model for designing flexible steel barriers for debris flow mitigation[J]. Canadian Geotechnical Journal，2019，56(6)：893–910. [18] IVERSON R M. Scaling and design of landslide and debris-flow experiments[J]. Geomorphology，2015，244：9–20. [19] 杨晖，张国华，王宇杰，等. 密集颗粒体系的颗粒运动及结构测量技术[J]. 力学进展，2018，48(1)：541–590.(YANG Hui，ZHANG Guohua，WANG Yujie，et al. Measurement techniques of grain motion and inter-grain structures in dense granular materials[J]. Advances in Mechanics，2018，48(1)：541–590.(in Chinese)) [20] JIANG R，FEI W P，ZHOU H W，et al. Experimental and numerical study on the load and deformation mechanism of a flexible net barrier under debris flow impact[J]. Bulletin of Engineering Geology and the Environment，2020，79：2 213–2 233. [21] ALBABA A，LAMBERT S，KNEIB F，et al. DEM modeling of a flexible barrier impacted by a dry granular flow[J]. Rock Mechanics and Rock Engineering，2017，50：3 029–3 048. [22] 肖思友，苏立君，姜元俊. 碎屑流冲击柔性网的离散元仿真研究[J]. 岩土工程学报，2019，41(3)：526–533.(XIAO Siyou，SU Lijun，JIANG Yuanjun. Numerical investigation on flexible barriers impacted by dry granular flows using DEM modeling[J]. Chinese Journal of Geotechnical Engineering，2019，41(3)：526–533.(in Chinese)) [23] EDEM Solutions. EDEM 2.7 user guide[M]. Edinburgh：EDEM Consulting Group Inc.，2015：21–23. [24] XIAO S Y，SU L J，JIANG Y J，et al. Estimating the maximum impact force of dry granular flow based on pileup characteristics[J]. Journal of mountain science，2019，16(10)：2 435–2 452.