漕河渡槽槽身混凝土防裂研究

分析了南水北调中线干线工程漕河渡槽在工程施工初期槽身产生裂缝的原因,产生裂缝的原因为：混凝土内外温差大;混凝土自身结构约束及自重应力大;施工过程中混凝土养护不到位等。通过优化混凝土配合比、选用高效减水剂、优化骨料级配等技术手段控制渡槽槽身混凝土裂缝的产生。

Study of Concrete Cracks Control in the Caohe River Aqueduct

The Caohe Aqueduct in the Middle Route Project of the South-to-North Water Diversion is the largest water aqueduct in China. In June 2005 on its early phase of construction the aqueduct began producing various degrees of cracks. In this paper,the causes of cracks wereanalyzed, some control measures taken were introduced.