干旱区生态环境知识资源中心(Arid): Field investigation and numerical simulation of the seismic triggering mechanism of the Tahman landslide in eastern Pamir, Northwest China

Arid

DOI	10.1007/s10064-019-01541-y
	Field investigation and numerical simulation of the seismic triggering mechanism of the Tahman landslide in eastern Pamir, Northwest China
	Zhu, Yuxuan 1,2; Dai, Fuchu 1,2; Yao, Xin 3; Tu, Xinbin 4; Shi, Xinshuai 5
通讯作者	Zhu, Yuxuan
来源期刊	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
ISSN	1435-9529
EISSN	1435-9537
出版年	2019
卷号	78 期号:8 页码:5795-5809
英文摘要	Landslides are one of the most common geological hazards in many parts of the world, which have brought catastrophic consequences to mankind. Seismic shaking can be an important trigger factor generally resulting in large-scale landslides. For some paleolandslides triggered by earthquakes, despite the lack of historical records, certain paleoseismic parameters can be back-analyzed. In this paper, the discrete element method (DEM) was applied to back-analyze the peak ground acceleration (PGA) triggering the Tahman landslide, a paleolandslide located in eastern Pamir, northwest China. Firstly, detailed field geological and geomorphological investigation was conducted to reveal the natural and seismic characteristics of the landslide. Subsequently, discrete element modeling was carried out. Simulation results suggested that the Tahman rock slope was stable under natural conditions. Owing to arid climate and water shortage of the study area, the influence of water was ignored. Additionally, from the perspective of the occurrence time of the landslide and geomorphologic feature of the deposits, the landslide was not caused by glacier activity and freeze-thaw events, and thus, must have been triggered by an earthquake. A peak ground acceleration (PGA) of 0.55 g was found to be a critical value for triggering landslides, and a PGA of 0.76 g could best simulate the kinematic process of a landslide when the simulation results were calibrated against the current geomorphological features of the landslide deposits. It can be concluded from the present study that: (1) PGA amplification in the rock slope was related to the topography during earthquake excitation; (2) the effective duration of the seismic wave had a considerable impact on the back-analyzed PGA, which decreased with increasing effective duration; and (3) the long runout of the Tahman landslide was due to its large volume and the interaction of the slide mass with moraines.
英文关键词	Paleolandslide Earthquake Field investigation Discrete element modeling PGA Back-analysis
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000496080700018
WOS关键词	ROCK AVALANCHE ; KONGUR-SHAN ; EARTHQUAKE ; DEBRIS ; EVOLUTION ; LOCATION ; FAILURE ; SLOPE ; INDEX ; SITE
WOS类目	Engineering, Environmental ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS研究方向	Engineering ; Geology
EI主题词	2019-12-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311138
作者单位	1.Beijing Univ Technol, Beijing 100124, Peoples R China; 2.Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China; 3.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China; 4.State Grid Econ & Technol Res Inst Co Ltd, Beijing 102209, Peoples R China; 5.Shandong Univ Sci & Technol, Qingdao 266590, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Yuxuan,Dai, Fuchu,Yao, Xin,et al. Field investigation and numerical simulation of the seismic triggering mechanism of the Tahman landslide in eastern Pamir, Northwest China[J],2019,78(8):5795-5809.
APA	Zhu, Yuxuan,Dai, Fuchu,Yao, Xin,Tu, Xinbin,&Shi, Xinshuai.(2019).Field investigation and numerical simulation of the seismic triggering mechanism of the Tahman landslide in eastern Pamir, Northwest China.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,78(8),5795-5809.
MLA	Zhu, Yuxuan,et al."Field investigation and numerical simulation of the seismic triggering mechanism of the Tahman landslide in eastern Pamir, Northwest China".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 78.8(2019):5795-5809.