混凝土坝临时断面过流条件下温度裂缝的防治  

Prevention to Temperature Crack for Concrete Dam Temporary Overflow Cross-section

作　　者：谢祥明[1] 谢彦辉[1] 石爱军[1] 曾礼成[1] 

机构地区：[1]广东水电二局股份有限公司,广东广州511340

出　　处：《华北水利水电学院学报》2007年第5期28-30,共3页North China Institute of Water Conservancy and Hydroelectric Power

摘　　要：大坝临时断面过流相当于混凝土承受一次大的寒潮,对于临时断面处在强约束区的坝段,过流极易使大坝产生劈头或贯穿裂缝.针对裂缝产生的原因,提出了过流保护与坝体永久保温相结合的方法,采用复合式保温板对大坝过流断面进行保温可有效地防止过流后产生劈头或贯穿裂缝.继而提出了对劈头和贯穿裂缝可采用限裂钢筋和灌浆相结合的处理方法,可供同类工程参考.The splitting or coalescence cracks are easily induced in the strongly restricted temporary overflow cross-section of the concrete dam, for the effect of temporary overflow equaled to a severely cold wave attack to the concrete dam. An effective method to prevent the temperature cracks is proposed, by adopting the composite insulation board to keeping the dam＇ s temperature integrated with the long-term dam insulation measure. Using the composite insulation board to keep the temperature of the concrete dam＇ s overflow cross-section, the cracks are depended validly, then the method of depending cracks is posed by combining the limited cracks steel bar with grouting, this is a reference for the similar engineerings.

关 键 词：混凝土坝 温度裂缝 复合保温板 限裂 过流 

分 类 号：TV698.231[水利工程—水利水电工程]