Soil-rock mixture is usually the main material for reservoir slope, landslide and dam foundation. The physical and mechanical properties of soil-rock mixtureare more complicated than common soil mass or rock mass, which is a difficult problem for researchers in the fields of rock mechanics, soil mechanics and geological engineering. In order to study the effect of gravel on uniaxial compressive strength and the mode of deformation failure of soil-rock mixture, we carried out unconfined uniaxial compression test by making mixture with certain rock block proportion. Combined with numerical method, the effect of spatial distribution of gravel on mixture’s overall strength was analyzed. The results show that, rock block proportion and spatial distribution of gravel have significant impact on uniaxial compressive strength and characteristics of deformation failure in soil-rock mixture. Uniaxial compressive strength declines with the increase of rock block proportion, at the same time, failure mode changes from single-crack failure to multi-crack failure, and time of propagation and coalescence of cracks increases.
Key words
soil-rock mixture /
gravel content /
gravel distribution /
failure mode /
uniaxial compressive strength
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References
[1] 油新华.土石混合体的随机结构模型及其应用研究.北京:北方交通大学,2001. (YOU Xin-hua. Stochastic Structural Model of the Earth-rock Aggregate and Its Application. Beijing: Northern Jiaotong University, 2001. ( in Chinese))
MEDLEY E .The Engineering Characterization of Mélanges Sand Similar Block-in-matrix Rocks( Bimrocks).Berkeley: University of California at Berkeley,1994.
孔祥臣.土石混合料压实特性的试验研究. 重庆: 重庆交通学院, 2004. (KONG Xiang-chen. Study on Compaction Property of Earth-Rock Mixture. Chongqing: Chongqing Jiaotong University, 2004.( in Chinese))
徐文杰,张海洋.土石混合体研究现状及发展趋势.水利水电科技进展, 2013, 33(1): 80-88. (XU Wen-jie, ZHANG Hai-yang. Research Status and Development Trend of Soil-rock Mixture . Advances in Science and Technology of Water Resources, 2013, 33(1): 80-88. (in Chinese))
董 云.土石混合料力学特性的试验研究. 重庆:重庆交通学院, 2005. (DONG Yun. Test Research on the Mechanics Characteristics of Rock-soil Aggregate Mixture. Chongqing: Chongqing Jiaotong University, 2005. ( in Chinese))
廖秋林,李 晓,李守定.土石混合体重塑样制备及其压密特征与力学特征分析.工程地质学报, 2010, 18(3): 385-391. (LIAO Qiu-lin, LI Xiao, LI Shou-ding. Sample Remodeling, Compactness Characteristic and Mechanical Behaviors of Rock-soil Mixtures. Journal of Engineering Geology, 2010, 18(3): 385-391.( in Chinese))
SONMEZ H, ALTINSOY H, GOKCEOGLU C. Considerations in Developing An Empirical Strength Criterion for Bimrocks∥International Sociey for Rock Mechanics. Proceedings of the 4th Asian Rock Mechanics Symposium, Singapore, November 6-10, 2006: 332.
AFIFIPOUR M, MOAREFVAND P. Mechanical Behavior of Bimrocks Having High Rock Block Proportion. International Journal of Rock Mechanics & Mining Sciences, 2014, 65(4): 40-48.
李兴瑞. 土石混合体的变形特性试验研究. 大连:大连理工大学, 2012.(LI Xin-rui. Study on Deformation Property of Earth-Rock Mixture. Dalian: Dalian University of Technology, 2012.(in Chinese))
徐文杰,胡瑞林,岳中崎. 土-石混合体随机细观结构生成系统的研发及其细观结构力学数值试验研究. 岩石力学与工程学报, 2009, 28(8): 1652-1665. (XU Wen-jie, HU Rui-lin, YU Z Q. Development of Random Mesostructure Generating System of Soil-Rock Mixture and Study of Its Mesostructural Mechanics Based on Numerical Test. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(8): 1652-1665. (in Chinese))
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