洪家渡水电站面板混凝土防裂措施研究及其应用  

Application and research of crack-resistant measures for face slab concrete of dam for Hongjiadu Hydropower Station

作　　者：何金荣[1] 陈娟[1] 曾正宾 

机构地区：[1]中国水电顾问集团贵阳勘测设计研究院,贵州贵阳550002

出　　处：《水利水电技术》2005年第9期52-54,共3页Water Resources and Hydropower Engineering

摘　　要：通过对洪家渡水电站面板堆石坝面板混凝土的原材料、配合比、施工工艺以及结构等方面进行的防裂措施研究,推荐选用了合适的混凝土水胶比和较大掺量的优质粉煤灰;水泥选用自身体积收缩小的品种,掺用补偿收缩材料以及聚丙烯纤维;施工上尽可能降低坍落度,加强养护;结构上研究了面板的合理配筋率和配筋位置,并采取降低对面板混凝土的约束等措施。实践证明,取得了很好的防裂效果。Experimental study is made on the crack-resistant measures for the concrete face slab of the dam for Hongjiadu Hydropower Station in aspects of the raw materials, mix proportions, construction technology and the structures ; from which some measures are recommended, such as the proper water-cement ratio ; larger admixing amount of high quality flyash ; selection of the cement with low shrinkage ratio; adding the shrinkage-compensating materials and polypropylene fiber; lowering the slump of concrete to the possible extent and strengthening the curing of concrete during construction ; meanwhile, studying the reasonable reinforcement ratio and the locations to be reinforced and lowering the restriction on the face slab structurally, etc. It is practically demonstrated that better crack-resistant effect has been obtained from the measures hereinabove.

关 键 词：防裂措施 面板混凝土 裂缝 洪家渡水电站 应用 施工工艺 面板堆石坝 聚丙烯纤维 体积收缩 补偿收缩 

分 类 号：TV641.43[水利工程—水利水电工程] TU755.7[建筑科学—建筑技术科学]