小湾水电站水垫塘抗冲耐磨混凝土施工

Construction of Scour Resistant Concrete for Water Cushion Pool in Xiaowan Hydropower Station

针对小湾水电站坝后水垫塘抗冲耐磨混凝土施工,工程量大,设计标号高,水胶比小,外掺材料多,跨高温、雨季,且抗冲耐磨混凝土粘稠性强,易发干发白、产生干缩裂缝,混凝土振捣困难,抹面平整度难以控制等特点,提出了混凝土配合比优化设计,混凝土拌和,过流面表面不平整处理,早期塑性干缩预防,后期收缩裂缝、温度裂缝预防,雨季施工防雨等措施,保证了施工质量和进度,取得了良好的社会经济效益。

Some difficulties has been encountered in the scour resistant concrete construction of water cushion pool in Xiaowan Hydropower Station： large construction quantity with high design grade,small ratio of water and gel,many mixed materials,high-temperature rainy season,thick abrasion-resistant concrete easy to dry and white which leads to dry shrinkage crack,difficult concrete vibrator and uneven surface.Measures such as optimization design,concrete mixing,flow surface roughness treatment,plastic shrinkage prevention in early stage,shrinking and temperature cracks prevention in later stage,rain proof in rainy season are proposed in order to ensure construction quality and progress and to achieve good social and economic benefits.