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近代的大型水力枢纽工程,泄水建筑物的工作水头愈来愈高,泄洪流量又很大,因而需要采用大断面的泄洪孔口.从结构、施工、运用、技术经济等方面考虑,其孔口工作闸门常采用弧形闸门.高水头、大跨度的大型弧门将承受巨大的挡水压力(国内外单扇孤门总水推力已达7000多吨),巨大的水推力将通过弧门支臂集中传给支承弧门的闸室结构承受.
In modern large-scale hydro-junction projects, the working head of the drainage structures is getting higher and higher, and the flood discharge flow is very large, so it needs to use the flood discharge orifice with large section. Considering the structure, construction, operation and technical economy, Gate work gate often use arc gate.High water head, large-span large arc gate will withstand a huge water pressure (domestic and international single-door solitary total thrust has reached more than 7,000 tons), huge water thrust through the arc gate branch Arm centralized transmission to support the arc gate chamber structure to withstand.