泽城西安水电站面板混凝土优化配比研究

Study on Proportion Optimization Design of Face Slab Concrete of Zecheng Xi’an Hydropower Station

泽城西安水电站是一座位于海河流域清漳河干流上的大型水电站,为了优化水电站面板混凝土配合比,文章设置了21个配合比方案进行优选,选取混凝土拌和性能(二级指标包括坍落度、含气量、表观密度)、混凝土力学性能(二级指标包括立方抗压、劈裂抗拉)、混凝土耐久性(二级指标包括相对渗透系数、相对动弹性模量)、混凝土经济性为面板混凝土优化配比的主要评价指标构建层次分析法获得权重,基于试验数据构建逐步回归模型解算混凝土最优配合比,以期为面板混凝土坝施工建设提供一定理论指导。

Zecheng Xi’an Hydropower Station is a large hydropower station located on the main stream of Qingzhang River in Haihe River Basin. 21 mix proportion schemes are set up in this paper in order to optimize the mix proportion of face slab concrete of the hydropower station. The mix performance of concrete(secondary indexes including slump, air content and apparent density), mechanical properties of concrete(secondary indexes including cube compressive strength and splitting tensile strength), durability of concrete(secondary indexes including relative permeability coefficient and relative dynamic elastic modulus) and economy of concrete are selected as the main evaluation indexes for optimal mix proportion of face slab concrete to construct the analytic hierarchy process(AHP) and obtain weight. A stepwise regression model is constructed to calculate the optimal concrete mix proportion based on the experimental data, in order to provide certain theoretical guidance for the construction of concrete face slab dam.