STUDY ON THE OPTIMIZATION OF THE SIMPLE STRUCTURE TYPE FOR RIVER LANDSLIDE SURGE REDUCTION IN THREE GORGES RES-ERVOIR AREA
Changes in the water level in the Three Gorges Reservoir area have increased the frequency of landslide surges in the river,posing a threat to the safety of people's lives and property.To address this issue,reduction anal-ysis of the energy generated by the landslide surge physical model tests was conducted.The analysis focused on wave dissipation efficiency,wave dissipation mechanisms,and the comprehensiveness of plate types(T-shaped,cross type),fence types(single-row type,multi-row type),and multi-hole types(integral type,split type)of wave structures.Key conclusions drawn from comparative analysis include:The fence type single-row structure is most ef-fective in river emergency situations and wave reduction.Wave dissipation mechanisms involve incident wave reflec-tion,vertical wave breaker blocking water body movement,floating board and water body friction,and backflow.Through comparative tests,the parameters of the single-row fence type wave-absorbing structure were optimized.The optimal design formula for the fence-type energy-dissipating structure was deduced,indicating that the efficien-cy of wave dissipation(β≥15％)and applicability is best when the L/hw ratio falls within the range of 0.65 to 0.75.The method of calculating the optimal energy dissipation efficiency value under two-dimensional conditions was applied to discuss the solution method for the optimal value of the three-dimensional energy dissipation struc-ture.The study also provides prevention and control measures along with suggestions for the practical application of energy dissipation structures.
Three Gorges Reservoir areaLandslide surgeWave structureSurge mitigationWave dissipation efficiency
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