闸门反向挡水时封闭梁格方案对启门力降低效果的研究

Study on effect of closed beam grillage scheme on the reduction ofopening force by reverse retaining gate

垂直提升式钢闸门反向挡水时,闸门的梁系结构朝向上游侧,由于水流的冲击作用,易导致启闭机的启门力严重不足。为了降低启门力,提出封闭梁格方案,基于CFD方法计算进行了分析,结果表明:闸门底部主梁上下表面压差形成的垂直作用力占水流总垂直作用力的85%~97%,封闭下部梁格与封闭全部梁格方案相比原方案的启门力分别降低15.5%与19.5%,原因在于避免了水流对底部主梁的冲击,降低了水流的垂直作用力。

When the vertical lifting steel gate is blocking the water in reverse,the beam structure of the gate is towards the upstream side.Due to the impact of the water flow,the opening force of the gate hoist is likely to be seriously insufficient.In order to reduce the opening force,a closed beam grillage scheme was proposed and analyzed based on CFD method calculations.The results showed that the vertical force formed by the pressure difference between the upper and lower surfaces of the main beam at the bottom of the gate accounted for 85%to 97%of the total vertical force of the water flow.The opening force of the closed lower girder and the closed all girders were reduced by 15.5%and 19.5%respectively compared with the original scheme.The reason was to avoid the impact of the water flow on the bottom main beam and reduce the vertical force of the water flow.