反压闸在万福低闸闸基渗控处理中的应用分析

Application of the Back Pressure Sluice in Foundation Seepage Control of Wanfu Sluice

分析渗透变形对水闸安全的危害,研究万福低闸渗控处理措施。采用AutoBank软件对有、无配套反压闸两种情形下的闸基渗流稳定进行计算分析表明:抵御高水位洪水时,因闸基粉砂层分布,延长渗径对减少水力坡降的作用有限,配设反压闸后,渗控效果明显增强,2021年的安全度汛实践证明取得了较好的效果。

With an analysis of the influence of seepage deformation on the sluice safety,the seepage control measures of Wanfu Sluice are proposed.AutoBank software is used to analyze the seepage stability of the sluice foundation with or without back pressure sluice.The results show that it is of limited effect to extend the seepage path on reducing the hydraulic gradient due to the distribution of silt layer in the sluice foundation when the sluice is retaining high water level flood.With the back pressure sluice,the seepage control effect is significantly improved.The flood control practice in 2021 proves that the measures are effective.