Formation mechanism and risk assessment of unstable rock mass at the Yumenkou tunnel entrance, Shanxi province, China | |
Wang, Zhong Fu1,2,3; He, Si Ming4; Liu, Han Dong1,2,3; Li, Dong Dong1 | |
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. |
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