小溪滩船闸混凝土结构裂缝控制技术

船闸工程底板、闸室墙、输水廊道顶面和侧面、门槛顶面和侧面等部位极易出现贯穿性的规则裂缝。通过理论分析和现场实践,从设计、材料、施工3个层次提出了船闸混凝土裂缝控制方法,主要包括调整构造钢筋直径和钢筋间距、设置施工宽缝、调整冷却水管、优化混凝土配合比、采用全断面浇筑工艺、控制分层浇筑时间间隔等措施,取得了较好的控裂效果。

Cracks control technology of concrete structures for Xiaoxitan lock

Concrete cracks are likely to occur at floor,chamber wall,top and side wall of water delivery gallery,top and side surface of the threshold and other parts of the lock.Through theoretical analysis and field practices,the design,materials,construction methods are proposed,including adjustment of rebar diameter and rebar spacing,setting wind construction joints,adjustment of the cooling water pipes,optimization of concrete mix,using whole section pouring process,control the layered pouring interval.The good effect is obtained.