Mechanism of toppling and deformation in hard rock slope: a case of bank slope of Hydropower Station, Qinghai Province, China

论文摘要

Recently, various toppling slopes have emerged with the development of hydropower projects in the western mountainous regions of China. The slope on the right bank of the Laxiwa Hydropower Station, located on the mainstream of the Yellow River in the Qinghai Province of Northwest China, is a typical hard rock slope. Further, its deformation characteristics are different from those of common natural hard rock toppling. Because this slope is located close to the dam of the hydropower station, its deformation mechanism has a practical significance. Based on detailed geological engineering surveys, four stages of deformation have been identified using discrete element numerical software and geological engineering analysis methods, including toppling creep, initial toppling deformation, intensified toppling deformation, and current slope formation. The spatial and time-related deformation of this site also exhibited four stages, including initial toppling, toppling development, intensification of toppling, and disintegration and collapse. Subsequently, the mechanism of toppling and deformation of the bank slope were studied. The results of this study exhibit important reference value for developing the prevention–control design of toppling and for ensuring operational safety in the hydropower reservoir area.

论文目录

• Introduction
• 1 Geological Setting
• 2 Failure Patterns
• 3 Analysis of the Toppling Deformation Mechanism
•   3.1 Calculation model
•   3.2 Toppling deformation mechanism of the slope
•     3.2.1 Stage of toppling creep
•     3.2.2 Initial stage of toppling:weak toppling, slab dislocation, and relaxation
•     3.2.3 Intensified toppling stage:strong toppling, slab stretched, fractured, or sheared
•     3.2.4 Current slope
•   3.3 Monitoring data analysis of calculation model
• 4 Conclusion

文章来源

类型: 期刊论文

作者: CAI Jun-chao,JU Neng-pan,HUANG Run-qiu,ZHENG Da,ZHAO Wei-hua,LI Long-qi,HUANG Jian

来源: Journal of Mountain Science 2019年04期

年度: 2019

分类: 基础科学,工程科技Ⅱ辑

专业: 水利水电工程

单位: State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology,College of Environment and Civil Engineering, Chengdu University of Technology

基金: financially supported by the National Key R&D Program of China (2018YFC1504905),the Funds for Creative Research Groups of China (41521002),the National Natural Science Foundation of China (41772317 and 41372306)

分类号: TV223

页码: 924-934

总页数: 11

文件大小: 1034K

下载量: 74