Experimental Study on Downstream Slope Erosion Prevention for Ski-jump Energy Dissipation in Steep Narrow Valley
An experimental study was conducted to investigate the scour prevention of downstream slopes in steep narrow valleys based on the ski-jump energy dissipation of the overflow tunnel at Lawa Hydropower station.The hy-draulic characteristics of the slopes were analyzed using both fixed bed and moving bed tests.The experimental find-ings indicate that the water flow pattern,near-bank velocity,and fluctuating pressure of the skew bucket are superi-or to those of beveled flip bucket.Additionally,the elevation of the maximum impact pressure point on the river-bank is close to the lowest elevation of bedrock's capacity to withstand scouring velocity.The scour pattern on steep slopes simulated with granular soils aligns well with the flow velocity law observed in fixed bed banks,thereby pro-viding a more accurate representation of the damage caused by water scour on steep bedrock slopes.These research results hold significant reference value for determining bank slope support,protection depth,and support structure design in similar projects.
ski-jump energy dissipationskew bucketbeveled flip bucketslope erosion preventionfluctuating pressurescouring experiment
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维普
