碾压混凝土坝夏季施工温控防裂问题探析  

Discussion on Temperature Control and Crack Prevention during the Construction of Roller-compacted Concrete Dam in Summer

作　　者：张集林 ZHANG Jilin(Guizhou Water Industry CO.LTD.,Guiyang 550025,China)

机构地区：[1]贵州水利实业有限公司,贵州贵阳550025

出　　处：《河南水利与南水北调》2024年第5期90-92,共3页Henan Water Resources & South-to-North Water Diversion

摘　　要：为探求碾压混凝土坝夏季施工过程中温度控制及裂缝防治思路,以某水电站拦河坝为例,结合工程实际提出坝体施工温控重难点,应用非均质层合单元法展开仿真分析,并提出温控设计标准;最后从降低混凝土水化热,控制混凝土入仓温度以及内外温差等方面对碾压混凝土坝温控防裂措施展开分析探讨。结果表明,对水工碾压混凝土结构而言,采取综合性的温度控制措施切实可行,使大坝混凝土施工质量得到保证。In order to investigate temperature control and crack prevention during the construction of a Roller-compacted concrete(RCC)dam in summer,a dam of a hydropower station is taken as an example.By integrating engineering practice,the key and challenging aspects of temperature control in dam construction are identified in this study.Furthermore,simulation analysis is conducted using the heterogeneous laminated element method to propose a temperature control design standard.The temperature control and crack prevention measures of RCC dam are finally analyzed and discussed,focusing on reducing the hydration heat of concrete,regulating the concrete storage temperature and managing the temperature difference between interior and exterior.The findings demonstrate the viability of implementing comprehensive temperature control measures in hydraulic RCC structures to ensure the construction quality of dam concrete.

关 键 词：碾压混凝土坝 夏季 施工 温控 防裂 

分 类 号：TV4[水利工程—水工结构工程]