强潮河口漫水丁坝上游冲刷的研究

Study of Upstream Scour Around Submerged Groins in Macro-tidal River Mouth

通过对强涌潮地区钱塘江河口漫水丁坝断面模型试验及涌潮翻越丁坝的水力计算研究 ,提出涌潮作用下漫水丁坝上游冲刷坑的形成机理 ,建立丁坝上游冲刷坑水深与潮前水深、涌潮高度、丁坝高度及丁坝上游面平台宽度的关系 .以此为基础 。

From model tests and hydraulic calculations about the submerged groins in the macro-tidal bore area of Qiantangjiang Estuary, the development mechanism of scour at the upstream side of submerge groins under the bore action is proposed. Then the relaIton between upstream side scour depth of groin and water depth before arriving of the bore, the bore height, the groin height and the groin shape is established. Thus, the estimation method of upstream side scour depth of the groins is obtained.