Abstract
In order to strengthen the monitoring of mountain deformation and the stability of high slope engineering in hydropower projects, taking a high slope in the spillway tunnel of a super-large hydropower project as an example, we calculated the slope stability of plunge pool through the finite element strength reduction method. The calculation results reveal the deformation characteristics and safety situation of high slope. Many factors, such as the structure, lithology, slope shape, excavation amount, unloading effect and engineering construction disturbance, will affect the failure mode of the slope. If the slope is not controlled by significant structural plane, the slope is controlled by progressive deformation. The key to ensure the stability of the slope lies in the control of the slope deformation, which can be intervened in advance through protective or control measures to control its de-formation and development manually. At present, the slope is in the deformation stage, and has not yet formed a unified potential sliding surface, and the whole slope is basically stable.
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