低水头折线型实用堰泥沙淤积影响研究

采用物理模型试验和数学模型计算相结合的方法,研究了上游堰高对折线型实用堰堰面泥沙淤积的影响。结果表明:上游堰高为3 m时,由于上游堰高值较大,且堰顶高程未高于上游河床高程,堰面检修门槽处的底流速和紊动能较大,泥沙不易淤积停留,对检修闸门正常启闭的影响较小。试验结果对类似工程设计具有一定的参考价值。

Study on impact from sedimentation of low-head broken line practical weir

With the method combined with both the physical model test and mathematical model calculation，the impact from the upstream weir height on the sedimentation on the weir face of the broken line practical weir is studied herein. The result shows that when the upstream weir height is 3m，the velocity of the bottom flow and the turbulent energy at the slot of the maintenance gate are larger and the sediment is not prone to remain therein due to the larger upstream weir height and the elevation of weir crest that is not higher than the upstream river bed，which has only less impact on the normal opening and closing of the maintenance gate. The test result can provide a certain reference for the similar engineering design.