全掺MgO整体拱坝的工作性态分析  

The Behavior of Arch Dam with Magnesium Oxide-based Shrinkage-compensating Concrete in Whole Dam

作　　者：罗恒[1] 张国新[2] 庞先明[1] 陈浩[1] 

机构地区：[1]贵州省大坝安全监测中心,贵州贵阳550002 [2]中国水利水电科学研究院,北京100038

出　　处：《水力发电》2007年第12期31-34,共4页Water Power

摘　　要：三江河拱坝是我国利用全坝外掺MgO、少量分缝及一个低温季节建成的第一座常态混凝土拱坝,目前已经成功运行了4年,取得了一些观测资料。以这些观测资料为基础,分析了三江河拱坝的工作性态、全掺MgO对大坝防裂及运行性态的影响,分析结果论证了全掺MgO配合适当分缝快速浇筑拱坝的思路的正确性,并对这种筑坝方式提出了几点建议。Sanjianghe arch dam is the first one constructed with MgO concrete and few transverse joints. The construction of the dam was finished in one season, and has been successfully in operation for 4 years. Based on the observation data, behavior of the dam during operation , the influence of MgO expansion on the prevention of cracking and the behavior of the dam were analyzed in the article. Results showed that Magnesium oxide-based shrinkage-compensating concrete in whole dam together with appropriate transverse joints is a feasible way for arch dam construction in a short period. Some suggestions to this construction method were also raised in this paper.

关 键 词：外掺MGO 分缝 三江河拱坝 

分 类 号：TU528.55[建筑科学—建筑技术科学]