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A new method for assessing slope unloading zones based on unloading strain

文献类型：期刊论文

作者Bao, Han2; Wu, Faquan3; Xi, Pengcheng1; Xu, Jianmin4; Liang, Ning1; Yan, Changgen2; Xu, Wei2; Qi, Qun2
刊名ENVIRONMENTAL EARTH SCIENCES
出版日期2020-07-04
卷号79期号:14页码:13
关键词Slope unloading zone Unloading strain Crack statistics Accumulative opening displacement Unloading zone assessment
ISSN号1866-6280
DOI10.1007/s12665-020-09077-1
英文摘要Unloading zones are formed in shallow slopes after rock mass relaxation and crack extension. Generally, slope unloading assessment depends on the traditional methods mainly related to the phenomena. However, unloading is a process of energy release. Based on the fracture mechanics and the statistical theory of rock mass structure, a theoretical analysis was performed to establish the relationship between the accumulative opening displacement of unloading cracks and unloading strain, and a new method was proposed to quantify the extent and damage degree of unloading zones according to unloading strain. The new method was applied to assess the slope unloading zones at a hydropower station dam site in Northwest China. Results showed that the accumulative opening displacement curve of unloading cracks regularly varied, and could be easily divided into three parts. The strong and weak unloading zones could be recognized from the slope of the first two parts, while their extent was limited by the two inflexions on each curve. By comparison with the traditional method, the new method confirmed the reasonability in the slope unloading zone assessment. However, with an increase in the unloading degree, the difference in the zonation results obtained from the two methods may increase.
WOS关键词EXCAVATION DAMAGED ZONE ; LEFT-BANK SLOPE ; HYDROPOWER STATION ; ROCK ; MECHANISM ; PROPAGATION ; STABILITY ; EVOLUTION ; LANDSLIDE ; BEHAVIOR
资助项目National Natural Science Foundation of China[41807246] ; National Natural Science Foundation of China[41927806] ; National Natural Science Foundation of China[41790443] ; National Key R&D Program of China[2019YFC1520601] ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province[PCMGH-2016-Z-03] ; Fundamental Research Funds for the Central Universities, CHD[300102219217] ; Fundamental Research Funds for the Central Universities, CHD[300102290201] ; Fundamental Research Funds for the Central Universities, CHD[300102219213]
WOS研究方向Environmental Sciences & Ecology ; Geology ; Water Resources
语种英语
WOS记录号WOS:000545104000001
出版者SPRINGER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province ; Fundamental Research Funds for the Central Universities, CHD ; Fundamental Research Funds for the Central Universities, CHD ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province ; Fundamental Research Funds for the Central Universities, CHD ; Fundamental Research Funds for the Central Universities, CHD ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province ; Fundamental Research Funds for the Central Universities, CHD ; Fundamental Research Funds for the Central Universities, CHD ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province ; Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province ; Fundamental Research Funds for the Central Universities, CHD ; Fundamental Research Funds for the Central Universities, CHD
源URL[http://ir.iggcas.ac.cn/handle/132A11/97116]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Bao, Han; Wu, Faquan
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Changan Univ, Sch Highway, Xian 710064, Peoples R China
3.Shaoxing Univ, Collaborat Innovat Ctr Prevent & Control Mt Geol, Coll Civil Engn, Shaoxing 312000, Peoples R China
4.Bei Fang Invest Design & Res CO LTD, Tianjin 300222, Peoples R China
推荐引用方式
GB/T 7714		 Bao, Han,Wu, Faquan,Xi, Pengcheng,et al. A new method for assessing slope unloading zones based on unloading strain[J]. ENVIRONMENTAL EARTH SCIENCES,2020,79(14):13.
APA Bao, Han.,Wu, Faquan.,Xi, Pengcheng.,Xu, Jianmin.,Liang, Ning.,...&Qi, Qun.(2020).A new method for assessing slope unloading zones based on unloading strain.ENVIRONMENTAL EARTH SCIENCES,79(14),13.
MLA Bao, Han,et al."A new method for assessing slope unloading zones based on unloading strain".ENVIRONMENTAL EARTH SCIENCES 79.14(2020):13.

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来源：地质与地球物理研究所

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