一次成型与分期成型面板混凝土施工与防裂措施探讨  

Discussion on concrete construction and crack prevention measures of faced concrete dam with single-time and multi-stages casting

作　　者：李斌 孟宪磊 王磊[2] 孔德轩 王润 LI Bin;MENG Xianiei;WANG Lei;KONG Dexuan;WANG Run(Hebei Fengning Pumped Storage Co., Ltd., State Grid Xinyuan Company, Chengde 068350, China;Yangtze River Scientific Research Institute, Wuhan 430071, China)

机构地区：[1]国网新源河北丰宁抽水蓄能有限公司,河北省承德市068350 [2]长江水利委员会长江科学院,湖北省武汉市430071

出　　处：《水电与抽水蓄能》2018年第2期8-13,共6页Hydropower and Pumped Storage

基　　金：国家自然科学基金资助项目(51409016)

摘　　要：本文在分析国内外混凝土面板堆石坝设计和施工资料的基础上,对比了采用一次成型(公伯峡、吉音面板坝)和分期成型(水布垭、蒲石河与十三陵面板坝)的典型面板坝的混凝土原材料应用、配合比、施工工艺以及开裂情况,探讨了一次成型面板与分期成型面板混凝土坝的施工及防裂措施。采用一次成型和分期成型的的面板混凝土的施工工艺类似,面板混凝土的开裂与采用一次成型工艺或者分期成型工艺没有必然的联系。从选择的几座面板坝开裂情况来看,一次成型或分期成型的面板混凝土的裂缝可以分结构裂缝与收缩裂缝。为防止面板混凝土发生开裂,工程采取的主要措施包括控制坝体沉降变形、减少坝体对面板的约束、合理选择混凝土原材料以及控制混凝土施工质量、加强混凝土养护等几个方面,并且都取得了一定的效果。Based on the analysis of the design and construction data of concrete faced rockfill dam with single-time（Gongboxia and Jiyin dam）and multi-stages（Shuibuya,Pushihye and Shisanling dam）casting,the application of concrete raw materials,mix proportion,construction technology and crack prevention measures of typical concrete faced rockfill dam are compared and discussed. The concrete construction process of concrete faced rockfill dam with single-time and multi-stages casting is similar,and cracking of concrete face slab is unrelated with the technology of concrete casting. From the comparison data of the typical concrete faced rockfill dams,the face slab cracks can be divided into structural cracks and shrinkage cracks. In order to prevent the face slab cracks,the main measures used in these projects include controlling the settlement and deformation of dam body,reducing the constraint of the dam body to the face slab,choosing the concrete raw material reasonably,controlling the construction quality of the concrete,and strengthening the concrete curing and so on.

关 键 词：面板混凝土的施工 面板混凝土的防裂 一次成型 分期成型 

分 类 号：TV523[水利工程—水利水电工程]