Stability Analysis And Control Measures Of Toba Hydropower Station

The D1slope was located at left bank of the Toba hydropower downstream from theinitial axis of the station,which near the water outlet of the dam power station. Thelandslide was about430m along the river and distribution of elevation1620m to1845m,thetrailing edge of the boundary was the ring-shaped arc. The downstream boundary wascomplete bedrock, central platform is a gentle slope, frontal extends to the river,no bedrockexposed along the water edge. The D1slope has been lying under the bed, constituted aforce anti-body strength, which keep better overall stability. Upper partial sliding safetyfactor is low, especially in heavy rain(discharge atomization)conditions, it may be deformedand seriously affect the operation and safety of the dam and discharge of the building.Therefore,D1slope stability analysis and control measures, have important theoreticalsignificance and engineering value.The limit equilibrium method and finite element method were employed in this paperto analyze the stability of the slope, and proposed control measures. The main contents areas follows:(1)Based on the investigation of the project in the field, we identify the slopeengineering geological conditions, deformation and destruction forms. It is concluded thatthe physical mechanical properties, confirmed the mechanical parameters of slope stabilityanalysis according to the in site-situ tests.(2)Analysis the stability of the four major slope section based on the limit equilibriummethod. According to three conditions on the slope stability calculation, we get the stabilitycoefficient. The slope is stable integrally by D1slope geological analysis and simpletwo-dimensional limit equilibrium method.(3)Adjust the parameters of the material, find out it susceptibility to slope stability.analysis. Seismic sensitivity to the slope stability analysis.(4)On the basis of the above analysis to study the reasonable reinforcement measures.According to the geological conditions and preliminary reinforcement plan, we establishedthe corresponding calculation model, analysis for temporary stability of slope toe,studiedthe reinforcement plans under various load combination the anti-sliding stability of theslope and evaluated the effectiveness of the strengthening plan and the overall stability ofthe slope. In this thesis, by means of the analysis of stability of temporary slope excavation process, it provide the basis for the slope excavation and supporting measures.