老口航运枢纽泄水闸坝设计

Sluice gate dam design of Laokou Complex

根据坝址的地形地质条件及工程对库区淹没的敏感性,经分析比较,老口航运枢纽泄洪建筑物选择13孔单孔净宽22 m的大孔口式泄水闸坝,溢流堰型为低坎宽顶堰,经模型试验验证,堰型合理,泄水闸坝泄流能力满足设计要求。对于承受弧门总推力为30 600 kN的闸墩,采用预应力结构,经有限元法分析计算,中、边闸墩厚度分别为3.2 m、4.5 m,配筋在合理的范围,结构安全能够满足。

According to the topographical and geological conditions of dam site, taking into account the sensitivity of the project to inundation, after analysis and comparison, the relief structure of Laokou Complex was designed as a sluice dam accommodating 13 gates, each with net width of 22m, low sill and broad-crest weir. The results of model test demonstrated the selected weir type is proper and the discharging capacity conforms to the design requirements. Pre-stressed structure was adopted for the pier withstanding total radial gate thrust up to 30600kN. According to the results of finite element calculation, the thickness of middle pier and abutment pier was determined as 3.2m and 4.5m respectively; reinforcement design is within reasonable range; and structural safety is guaranteed.