Evolution trend of the Huangyanwo rock mass under the action of reservoir water fluctuation

摘要

The Huangyanwo rock mass (HRM) is distributed in the right bank cliffs of the Yangtze River. And the total volume of HRM is about 955,000 m(3), causing a large-scale rock mass at risk of failure. Herein, varieties of methods are used to investigate the development of cracks and broken regions in the high-steep area, underwater area, and internal areas of the HRM. Furthermore, the potential failure mechanism and the stability trend of HRM are proposed based on the detailed survey results and numerical simulation. To be specific, our study proves that the reservoir water could induce periodic mechanical state changes of HRM. When the water level rises, the deformation and shear stress of the HRM increase together with the decrease in stability and vice versa. Therefore, the stability of the HRM is likely to reach the critical state after 30 hydrological years considering the deterioration of broken areas under the action of reservoir water fluctuation. The relevant survey and analysis methods employed in this paper can provide valuable reference for the future evolution analysis of the reservoir bank.

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