南公1水电站堆石坝面板混凝土防裂技术研究  

Research on Crack Prevention Technology of Concrete Face Slab for Rockfill Dam of Nangong 1 Hydropower Station

作　　者：许浩 田雨浩 郑建月 陈明[2] XU Hao;TIAN Yu-hao;ZHENG Jian-yue;CHEN Ming(China International Water&Electric Corp.,Beijing 101199,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Hubei 430072,China)

机构地区：[1]中国水利电力对外有限公司,北京101199 [2]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072

出　　处：《中国农村水利水电》2025年第4期84-89,共6页China Rural Water and Hydropower

基　　金：富水环境下裂隙岩体的爆破破坏机制研究(51979205)。

摘　　要：老挝是“一带一路”建设的重要成员国之一,南公1水电站是中国-老挝清洁能源战略合作开发的重点项目。为解决南公1水电站混凝土面板工期短、疫情期间人员短缺、需在高温季节施工以及溢洪道开挖料作为筑坝料时质量难以控制等难题,通过材料优选、配合比实验、优化施工工艺等举措优化了面板混凝土的施工工艺及面板防裂技术,确保了混凝土面板的质量和大坝运行期的安全,主要研究成果如下:筑坝料在施工过程中,通过挤压边墙结构控制、混凝土面板及混凝土浇筑过程控制,有效解决了高温季节面板混凝土施工质量控制的难题,确保了南公1水电站混凝土面板的各项性能指标达到甚至超过设计标准及同类型面板;进行了混凝土干缩、水泥水化热对比试验等相关试验,结合混凝土拌和物工作性能、混凝土力学等相关试验成果,筛选出了满足设计要求的最优混凝土配合比,增强面板混凝土适应变形的能力以降低面板的裂缝发生。经检测,南公1水电站堆石坝面板与挤压边墙结合紧密,混凝土面板上未发现一条裂缝,质量优良,为大坝的稳定安全运行提供了保障。Laos is one of the important member countries of the“Belt and Road”construction,and the Nangong1 Hydropower Station is a key project of China-Laos clean energy strategic cooperation and development.In order to solve the problems of short construction period,shortage of personnel during the epidemic,the need for construction in high temperature seasons,and the difficulty in controlling the quality of spillway excavation materials used as dam materials for Nangong1 Hydropower Station,the construction process and crack prevention technology of the panel concrete were optimized through measures such as material selection,mix ratio experiments,and optimization of construction technology,ensuring the quality of concrete panels and the safety of dam operation.The main research results are as follows:during the construction process,the dam material effectively solves the problem of quality control in the construction of panel concrete during the high temperature season by controlling the compression of the side wall structure,concrete panels,and concrete pouring process,ensuring that the various performance indicators of the concrete panels of Nangong 1 hydropower station reach or even exceed the design standards and similar types of panels;We conducted relevant tests such as concrete shrinkage and cement hydration heat comparison,combined with the performance of concrete mixtures,concrete mechanics and other related test results,and selected the optimal concrete mix proportion that meets the design requirements to enhance the ability of panel concrete to adapt to deformation and reduce the occurrence of cracks in the panel.After testing,it was found that the panel of the Nangong 1 hydropower station's rockfill dam is tightly combined with the squeezed side wall,and no cracks were found on the concrete panel.The quality is excellent,providing a guarantee for the stable and safe operation of the dam.

关 键 词：堆石坝 混凝土面板 混凝土配合比 防裂控制 

分 类 号：TV523[水利工程—水利水电工程]