Shear Mechanical Behaviours and Multistrength Parameter Characteristics of Fault Gouge

doi:10.1155/2019/4208032

	Shear Mechanical Behaviours and Multistrength Parameter Characteristics of Fault Gouge
	Bao, Han 1; Qi, Qun 1; Lan, Hengxing 2,3; Yan, Changgen 1; Xu, Wei 1; Liu, Xin 3; Li, Langping 2
刊名	ADVANCES IN CIVIL ENGINEERING
	2019-11-18
卷号	2019 页码:14
ISSN号	1687-8086
DOI	10.1155/2019/4208032
通讯作者	Bao, Han(baohangeo@163.com) ; Qi, Qun(2017221102@chd.edu.cn)
英文摘要	Fault gouge has special mechanical properties and remarkable engineering effects. Using a ring shear test, the strength properties of the differently colored remolded fault gouges of the Shendaogou Fault in Yan'an were studied by changing moisture contents and normal stresses. Chlorite and illite are the main clay minerals in fault gouges; differences in mineral composition make fault gouges appear in different colors. Besides clay minerals, the dried fault gouges disintegration in water is also due to the transformation of gypsum. The gradation of green fault gouge and multicolor fault gouge is better than that of the red fault gouge, while the fault gouges' strain softening properties become weaker as the coarse grain content increases. Affected by water content and normal stress, the shear planes can be divided into three failure modes: peeling failure, grooved failure, and sliding failure. With the increase of water content, there will be a significant weakening on cohesion and friction angle. A new parameter, the "Normal Stress Threshold (NST)," is introduced as a critical value for the emergence of the strain hardening phenomenon, and the NSTs of different fault gouges are significantly different. The functions obtained from the relation of residual strength, peak strength, and normal stress can be used to calculate shear strength parameters under any normal stresses. In addition, the residual strength of fault gouge is obviously different from clay and loess, which can be qualitatively explained by clay particle contents.
资助项目	National Natural Science Foundation of China[41790443] ; National Natural Science Foundation of China[41807246] ; National Natural Science Foundation of China[41927806] ; Natural Science Foundation of Shaanxi Province[2018JQ4017] ; Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province ; Scientific Innovation Practice Project of Postgraduates of Chang'an University[300103002033] ; Fundamental Research Funds for the Central Universities[300102218412] ; Fundamental Research Funds for the Central Universities[300102219213]
WOS关键词	RESIDUAL STRENGTH ; PERMEABILITY ; LANDSLIDE ; LOESS ; WATER ; EVOLUTION ; APPARATUS ; FRICTION ; PLATEAU ; STRESS
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000501204900001
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Shaanxi Province ; Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province ; Scientific Innovation Practice Project of Postgraduates of Chang'an University ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/130365]
专题	中国科学院地理科学与资源研究所
通讯作者	Bao, Han; Qi, Qun
作者单位	1.Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 3.Changan Univ, Sch Geol Engn & Geomat, Xian 710064, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Bao, Han,Qi, Qun,Lan, Hengxing,et al. Shear Mechanical Behaviours and Multistrength Parameter Characteristics of Fault Gouge[J]. ADVANCES IN CIVIL ENGINEERING,2019,2019:14.
APA	Bao, Han.,Qi, Qun.,Lan, Hengxing.,Yan, Changgen.,Xu, Wei.,...&Li, Langping.(2019).Shear Mechanical Behaviours and Multistrength Parameter Characteristics of Fault Gouge.ADVANCES IN CIVIL ENGINEERING,2019,14.
MLA	Bao, Han,et al."Shear Mechanical Behaviours and Multistrength Parameter Characteristics of Fault Gouge".ADVANCES IN CIVIL ENGINEERING 2019(2019):14.