龙羊峡底孔泄水道冲蚀破坏成因探析

Research For Causation of Erosion Destroy in Bottom Vulua on Longyang Gorge

龙羊峡底孔泄水道是龙羊峡工程最低一层泄洪设施 ,特点是采用突扩跌坎掺气体型 ,工程运用中产生了较严重的冲蚀破坏 ,为此进行了减压模型试验。试验着重对其空化特性进行了测试、分析 ,并对实际中产生冲蚀破坏的原因进行了探析 ,多方面的不利因素 (高流速、突扩跌坎体型掺气的不充足、施工中的种种不平整度 )同时存在 。

Bottom spillway is lowest sluice establishment used in longyang gorge project.Its characteristic is using sudden enlarge and drop bank forms.It produced severious erosion destroy.So we do decompression test.Emphasized test and analyse its cavitation identity.also research for causation of erosion destyoy in practice. many factors(high velocity of flow, aerify insufficienty of sudden enlarge and drop bank, inequality in construct) exist at one time, thereby, thereby arouse erosion destroy.