大跨径连续刚构桥混凝土缺陷成因分析及改进措施

Cause Analysis and Improvement Measures for Concrete Defects of Longspan Continuous Rigid Frame Bridge

大跨径连续刚构桥施工过程中常出现混凝土缺陷,为有效控制混凝土缺陷,以宜昭高速公路大跨度连续刚构桥牛街特大桥施工过程中出现的混凝土缺陷为例,分析混凝土缺陷成因,提出从人、机、料、法、环等因素进行质量控制,为山区高墩大跨径连续刚构桥混凝土缺陷处理提供了施工案例。

Concrete defects often occur during construction of large-span continuous rigid frame bridge. In order to effectively control concrete defects, this paper takes large-span continuous rigid frame bridge of Yizhao Expressway as an example to analyze the causes of concrete defects. The method of quality control from human,machine, material, method and ring is put forward, which provides construction case for concrete defect treatment of high pier, large span continuous rigid frame bridge in mountainous area.