为探究不同粒径及级配对碎石料休止角的影响，通过散粒体边坡堆积试验中改进的碎石料休止角测量方法，对不同粒径及级配碎石料休止角进行测量，并结合试验堆积现象进行观察分析。结果表明随均质粒径碎石料粒径的增大，休止角逐渐增大;随不均匀系数的增加，平均粒径对休止角的影响逐渐变小;不均匀系数对休止角的影响呈先增大后趋于稳定;颗粒级配分布愈不均匀，散粒体边坡休止角越大。
Abstract
In order to explore the influence of gradation and particle size on repose angle of rockfill, we conducted accumulation model test of granular mixtures slope and analyzed the accumulation phenomenon. Then we measured the repose angle of rockfill material with different particle sizes and gradations by improved measuring method. The results show that repose angle increases gradually with the increase of particle size of homogeneous rockfill. The influence of average particle size on repose angle is weakened gradually with the increase of non-uniform coefficient, while the influence of non-uniform coefficient on the repose angle increases firstly and then keeps stable. Besides, the repose angle of granular mixtures becomes larger when the particle size distribution is more uneven.
关键词
碎石料 /
休止角 /
散粒体斜坡 /
不均匀系数 /
堆积现象
Key words
rockfill material /
repose angle /
granular mixtures slope /
non-uniform coefficient /
accumulation phenomenon
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 马 刚, 周 伟, 常晓林, 等. 锚杆加固散粒体的作用机制研究. 岩石力学与工程学报, 2010,29(8):1577-1584.
庄 丽, 周顺华. 散粒体卸载特性的三轴伸长试验研究. 固体力学学报, 2009, 30(4): 354-360.
GUO Zhi-guo, CHEN Xue-li, LIU Hai-feng,et al. Theoretical and Experimental Investigation on Angle of Repose of Biomass-coal Blends. Fuel, 2014, 116(1): 131-139.
ILELEJI K E,ZHOU B.The Angle of Repose of Bulk Corn Stover Particles.Powder Technology,2008,187(2):110-118.
NAKASHIMA H, SHIOJI Y, KOBAYASHI T, et al. Determining the Angle of Repose of Sand under Low-gravity Conditions Using Discrete Element Method. Journal of Terramechanics, 2011, 48(1): 17-26.
闵凤阳,姚仕明,黎礼刚.模型沙特性研究进展.长江科学院院报,2011,28(2):79-86.
孙开畅,田 斌,孙志禹.高土石围堰堰体材料力学特性及变形研究.长江科学院院报,2011,28(2): 60-64.
杨庆华, 姚令侃, 任自铭, 等. 地震作用下松散体斜坡崩塌动力学特性离心模型试验研究. 岩石力学与工程学报, 2008, 27(2): 368-374.
孙开畅,胡昌顺.溪洛渡水电站拱肩槽及进水口高边坡稳定性研究[J]. 长江科学院院报,2007,24(2):17-21.
基金
长江科学院开放研究基金资助项目(CKWV2013208/KY);湖北省自然科学基金重点项目(2012FFA087)
PDF(8712 KB)
