Formation mechanism and risk assessment of unstable rock mass at the Yumenkou tunnel entrance, Shanxi province, China

doi:10.1007/s10064-020-01953-1

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所

	Formation mechanism and risk assessment of unstable rock mass at the Yumenkou tunnel entrance, Shanxi province, China
	Wang, Zhong Fu 1,2,3; He, Si Ming 4; Liu, Han Dong 1,2,3; Li, Dong Dong 1
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2020-08-19
页码	DOI: 10.1007/s10064-020-01953-1
关键词	Formation mechanism Risk assessment Rockfall Unmanned aerial vehicle Laser scanning
ISSN号	1435-9529
DOI	10.1007/s10064-020-01953-1
通讯作者	Wang, Zhong Fu(xfjtwzf@163.com)
产权排序	4
文献子类	Article; Early Access
英文摘要	The Yumenkou tunnel is located on the left bank of the Yellow River on the border between Shanxi and Shaanxi provinces, China. It is connected to the Longmen Yellow River Bridge of the Menghua railway. Many unstable rock masses have developed on the cliff above the tunnel entrance, threatening the construction and operation of the tunnel and the bridge. Based on a high-precision three-dimensional (3D) digital terrain model obtained by unmanned air vehicle (UAV) photogrammetry, information of the structural surface which controls the stability of the rock mass in the study area was obtained by manual identification and extraction. We combined the UAV imaging with field survey data to obtain the spatial distribution, shape, scale, and potential failure modes of the unstable rock masses. A 3D numerical model of the unstable rock mass and surface morphology was constructed using a 3D discrete element method. The 3D path and impact energy of the moving unstable rock mass were analyzed. Based on the lithology, topography, structural surface, and other factors, three types of potential rock failure modes were identified in the study area: sliding, toppling, and falling. Differential weathering and the structure plane and stress-unloading cracks are two main factors affecting the stability of the unstable rock mass. According to the result of 3D discrete element method, once the unstable rock masses fail, about 50% of which might hit the portal of the tunnel, and the maximum rebound height at the portal would be about 1.2 m. To prevent such catastrophic failure, active protective net was recommend at each unstable rock zone, and retaining wall with a height of 5 m behind the portal. The results of this study confirm the effectiveness of a UAV photogrammetry-based method for reliable and cost-effective engineering geological surveying of unstable rock mass in complex terrain.
电子版国际标准刊号	1435-9537
资助项目	National Natural Science Foundation of China[U1704243] ; National Key Research and Development Program[2019YFC1509704] ; project of high-level talent at the North China University of Water Resource and Electric Power[201518]
WOS关键词	DISCONTINUITY ORIENTATION ; MODEL ; LIDAR ; UAV ; PHOTOGRAMMETRY ; FLOWS ; SLOPE
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000560635000001
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program ; project of high-level talent at the North China University of Water Resource and Electric Power
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/35459]
专题	中国科学院水利部成都山地灾害与环境研究所
通讯作者	Wang, Zhong Fu
作者单位	1.North China Univ Water Resources & Elect Power, Zhengzhou, Peoples R China; 2.Henan Key Lab Geotech & Struct Engn, Zhengzhou, Peoples R China; 3.Collaborat Innovat Ctr Water Resources Efficient, Zhengzhou 450045, Peoples R China; 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhong Fu,He, Si Ming,Liu, Han Dong,et al. Formation mechanism and risk assessment of unstable rock mass at the Yumenkou tunnel entrance, Shanxi province, China[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2020:DOI: 10.1007/s10064-020-01953-1.
APA	Wang, Zhong Fu,He, Si Ming,Liu, Han Dong,&Li, Dong Dong.(2020).Formation mechanism and risk assessment of unstable rock mass at the Yumenkou tunnel entrance, Shanxi province, China.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,DOI: 10.1007/s10064-020-01953-1.
MLA	Wang, Zhong Fu,et al."Formation mechanism and risk assessment of unstable rock mass at the Yumenkou tunnel entrance, Shanxi province, China".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2020):DOI: 10.1007/s10064-020-01953-1.