Investigating the softening of weak interlayers during landslides using nanoindentation experiments and simulations

doi:10.1016/j.enggeo.2020.105801

	Investigating the softening of weak interlayers during landslides using nanoindentation experiments and simulations
	Xu, Jingjing 1; Tang, Xuhai 1; Wang, Zhengzhi 1; Feng, Yufei 1; Bian, Kang 2
刊名	ENGINEERING GEOLOGY
	2020-11-01
卷号	277 页码:12
关键词	Softening of weak interlayers Landslide Nanoindentation test Multiscale Microsensitive fractured rock
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2020.105801
英文摘要	Based on nanoindentation experiments and numerical simulations, an approach is developed to investigate the softening of weak interlayers, which might trigger landslides. The components of weak interlayers in natural slopes are mainly rock fragments and clay, which lead to the difficulty of preparing intact samples for traditional rock mechanical experiments. Additionally, most rock slopes are microsensitive fractured geological media. The slope failures are significantly influenced by the anisotropic and rheological mechanical evolution of weak interlayers, which is strongly related to their microstructure. In this work, the shale in weak interlayers is investigated using nanoindentation experiments, so the experimental samples can be very small and possess arbitrary shapes. The experimental results at the microscale are upscaled using the Gaussian mixture model and Mori-Tanaka scheme, which are then used in numerical modeling to investigate the failure of a slope in southwestern China. According to the results, after water immersion, the friction angle of shales is almost constant, while the elastic modulus and cohesion decrease significantly. The shear strength of weak interlayers decreases significantly so that the plastic zones develop along the weak interlayer, which leads to landslides.
资助项目	National Key Research and Development Program of China[2017YFC1501300] ; National Natural Science Foundation of China[41941018]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000584622900018
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25173]
专题	中科院武汉岩土力学所
通讯作者	Tang, Xuhai; Feng, Yufei
作者单位	1.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430072, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Xu, Jingjing,Tang, Xuhai,Wang, Zhengzhi,et al. Investigating the softening of weak interlayers during landslides using nanoindentation experiments and simulations[J]. ENGINEERING GEOLOGY,2020,277:12.
APA	Xu, Jingjing,Tang, Xuhai,Wang, Zhengzhi,Feng, Yufei,&Bian, Kang.(2020).Investigating the softening of weak interlayers during landslides using nanoindentation experiments and simulations.ENGINEERING GEOLOGY,277,12.
MLA	Xu, Jingjing,et al."Investigating the softening of weak interlayers during landslides using nanoindentation experiments and simulations".ENGINEERING GEOLOGY 277(2020):12.