Study on the shear strength of soil-rock mixture by large scale direct shear test

doi:10.1016/j.ijrmms.2011.09.018

	Study on the shear strength of soil-rock mixture by large scale direct shear test
	Xua, Wen-Jie 1; Xu, Qiang 2; Hu, Rui-Lin 3
刊名	INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
	2011-12-01
卷号	48 期号:8 页码:1235-1247
关键词	Soil-rock Mixtures Soil/rock Threshold Digital Image Processing Maximal Observed Dimension In-situ Testing Shear Strength
ISSN号	1365-1609
DOI	10.1016/j.ijrmms.2011.09.018
文献子类	Article
英文摘要	Soil-rock mixtures (S-RM) which formed in the quaternary period are a type of extremely inhomogeneous and loose geomaterial with a certain percentage of rock blocks. They are composed of rock blocks with various sizes and high strength, fine grained soil and pores. The meso-failure mechanism and macro-physical and mechanical characteristics of S-RM are largely controlled by its rock block proportion and the granular distribution. As we know, when the rock blocks in the S-RM are larger, it is difficult to take an in-situ sample for an on-site test. In addition, it is difficult to obtain the granular distribution of rock blocks in S-RM by traditional sieving tests. This paper uses a new method called digital image processing (DIP) in which the rock blocks in S-RM samples are separated from the soil matrix, and the proportion and distribution of the rock blocks is obtained quantitatively. The results are used for the sample preparation of the large scale direct shear tests which provide a new method for the test study of S-RM. According to the results of large scale direct shear tests the rock block size proportion controls the deformation and fracture mechanism of the S-RM. The shape of the shear stress vs horizontal displacement curve and the vertical displacement vs horizontal displacement curve of the S-RM samples are different from that of general "soil" and "rock". With the increment of the rock block proportion the shear band of the S-RM increases. When the rock block proportion lies in the range of 25-70%, the increment of the internal friction angle linearly increases with the increment of the rock block proportion. The cohesion of the S-RM decreases compared with that of the soil. When the rock block proportion is larger than 30%, however, there is only a little decrease in the cohesion with the increment of the rock block proportion. (C) 2011 Elsevier Ltd. All rights reserved.
WOS关键词	LANDSLIDE ; CHINA
WOS研究方向	Engineering ; Mining & Mineral Processing
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000297405500003
资助机构	State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2011K015 ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2011K015 ; Natural Science Foundation of China(51109117) ; Natural Science Foundation of China(51109117) ; National Basic Research Program of China(2010CB732103) ; National Basic Research Program of China(2010CB732103) ; GZ2007-10) ; GZ2007-10) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2011K015 ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2011K015 ; Natural Science Foundation of China(51109117) ; Natural Science Foundation of China(51109117) ; National Basic Research Program of China(2010CB732103) ; National Basic Research Program of China(2010CB732103) ; GZ2007-10) ; GZ2007-10) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2011K015 ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2011K015 ; Natural Science Foundation of China(51109117) ; Natural Science Foundation of China(51109117) ; National Basic Research Program of China(2010CB732103) ; National Basic Research Program of China(2010CB732103) ; GZ2007-10) ; GZ2007-10) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2011K015 ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2011K015 ; Natural Science Foundation of China(51109117) ; Natural Science Foundation of China(51109117) ; National Basic Research Program of China(2010CB732103) ; National Basic Research Program of China(2010CB732103) ; GZ2007-10) ; GZ2007-10)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73918]
专题	中国科学院地质与地球物理研究所
通讯作者	Xua, Wen-Jie
作者单位	1.Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Hydraul Engn, Beijing 100084, Peoples R China 2.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Peoples R China 3.Chinese Acad Sci, Key Lab Engn Geomech, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Xua, Wen-Jie,Xu, Qiang,Hu, Rui-Lin. Study on the shear strength of soil-rock mixture by large scale direct shear test[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2011,48(8):1235-1247.
APA	Xua, Wen-Jie,Xu, Qiang,&Hu, Rui-Lin.(2011).Study on the shear strength of soil-rock mixture by large scale direct shear test.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,48(8),1235-1247.
MLA	Xua, Wen-Jie,et al."Study on the shear strength of soil-rock mixture by large scale direct shear test".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 48.8(2011):1235-1247.