延长反滤在水闸消力池前端的应用分析

Application Analysis of Extended Backfilter in Front of Sluice Dissipation Tank

水闸消力池底板前端布设排水孔,可减小前端底板的渗透压力,但增加了排水孔的渗透比降,可能产生渗透破坏;水闸消力池底板前端不设置排水孔,前端底板的渗透压力大,同时水跃的发生使得消力池前端水的压重减小,容易发生隆起开裂险情。文章以松柏头水闸为例,通过延长布设反滤,适量减少底板承受的渗透压力,降低渗透比降,避免消力池前端隆起开裂,保障消力池底板安全稳定。

The drainage hole is arranged at the front end of the bottom plate of the sluice to reduce the permeability pressure of the bottom plate and the permeability pressure of the bottom reduces the pressure to uplift cracking risk.The article takes the cypress head sluice as an example,by extending the layout filter,reduce the infiltration pressure under the bottom plate,reduce the permeability ratio,avoid the front end of the defeller pool uplift cracking,and ensure the safety and stability of the dissipation pool bottom plate.