IMHE OpenIR  > 山地灾害与地表过程重点实验室
Alternative TitleBuffering effect of gravel cushion layer on the impact of dry granular flow against a rock shed
宋跃1,2; 姜元俊1; 王萌1
Source Publication岩石力学与工程学报
Contribution Rank1
Other AbstractRock sheds are often used to protect the mountain roads from dry granular flow impact from landslides or avalanches. In order to further clarify the protective effect of cushion layer on rock shed,the impact mechanism of dry granular flow against rock shed and the cushioning effect of the cushion layer made of gravel were studied through the laboratory model experiment. The high speed camera recordings in the experiment showed that the gravel cushion layer deformed notably in the process of a dry granular flow impact. The force sensor measured the distribution of the impact force along the rock shed in the normal and tangential directions. The experimental results reveal that for the cases without a cushion layer,the maximum normal and tangential components of forces are close to the footing of the rock shed directly facing granular flow impact. With the addition of a cushion layer, the maximum impact force decreases and shifts approximately 30° to 45° away from the footing,indicating that the cushion layer can not only reduce the magnitude,but also change the mode of distribution of the impact force. It was found from the internal forces calculated that cushion layers can reduce the internal bending moment and internal shear force and increase the internal axial force,which enhances the safety of the rock shed. It was also verified that the finer granular material has higher capacity of energy dissipation. The experimental results fully indicated that a cushion layer played a significant role in buffering impact and dissipating energy in the process of a dry granular flow impacting on a rock shed.
Keyword工程地质 碎屑流 棚洞 冲击 垫层
Indexed ByEI ; CSCD
EI Accession NumberAccession number: 20190406403140
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author姜元俊
Affiliation1.中国科学院 水利部成都山地灾害与环境研究所;
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
宋跃,姜元俊,王萌. 碎石垫层对碎屑流冲击棚洞的缓冲效应研究[J]. 岩石力学与工程学报,2018,37(10):2359-2369.
APA 宋跃,姜元俊,&王萌.(2018).碎石垫层对碎屑流冲击棚洞的缓冲效应研究.岩石力学与工程学报,37(10),2359-2369.
MLA 宋跃,et al."碎石垫层对碎屑流冲击棚洞的缓冲效应研究".岩石力学与工程学报 37.10(2018):2359-2369.
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