挑流石梁作用下丁坝坝根周围流速分布规律

Velocity distribution pattern around spur dike's root under flow-deflecting reef

通过概化模型试验对挑流石梁作用下的丁坝坝根周围流速进行测量,并对不同工况下坝根周围的流速值进行分析,得出坝根处流速随来流量及水深变化的分布规律。结果表明:受挑流石梁的影响,坝根附近的流速比正常河段大很多,且坝根附近的横、纵断面流速值随来流量的增大而增大,随水深的增加而逐渐减小。

Based on the generalized model test, we measure the flow velocity around the root of the spur dike under the flow-deflecting reef and analyze the flow velocity value around the root of spur dike under different conditions, and obtain the velocity distribution pattern around the dike root under different flow volumes and different water depths.The analysis shows that under the influence reef, the flow velocity near the dike root is much higher than that of the normal reach, and the velocity of the cross section and profile near the dike root increases with the increasing flow and decreases with the increasing water depth.