沧河渠道倒虹吸河道冲刷与导流堤的防护研究

Protection for Diversion Dike and River Channel Scour of Inverted Siphon in Canghe River

通过沧河渠道倒虹吸试验观测,结合交叉断面及梨形导流堤临水侧流速分布,分析了河道的冲淤变化、梨形导流堤附近河道的局部冲刷。结果表明,河道的一般冲刷变形尚不至于影响到穿河工程的安全,但应对交叉断面及其上游附近河道进行适当整治;梨形导流堤坡脚的钢筋石笼防护宽度以20m为宜。

Through test observation of inverted siphon in Canghe River, considering water flow distribution in cross section and pear-shaped diversion dike, the paper has analyzed the scouring changes of the riverway, and local scour near pear-shaped diversion dike. Results showed general scouring change would not influence the safety of river-crossing project, but regulating fiver work should be done on the crossing section and its upstream channel, and the width of reinforced gabion protection should be 20m in pear-shaped diversion dike.