Large Deformation Analysis and Stability Recheck of a Large Slope during the Construction Process of a Certain Hydropower Station

Abstract During the excavation process of a certain hydropower station project, cracks and significant deformations emerged on the slope. To guarantee the stability of the slope and the safety of construction, based on the actual construction circumstances and monitoring data on site, a three-dimensional model of the slope was established in this paper. The strength reduction method was employed to conduct a recheck and analysis on the stability of the slope of the power plant. The results indicate that under the designed support plan, the safety factor of the construction condition is 1.301. The slope deformation and the support stress level are in accordance with the monitoring data. There is no non-convergent deformation of the slope, fulfilling the design requirements of the specification. The current support plan is effective and feasible, and is capable of ensuring the safety and stability of the slope during the construction period.