钢壳沉管自密实混凝土浇筑顶面缺陷表征研究  

Characterization of top surface defects of steel shell immersed tube self-compacting concrete

作　　者：张照坤[1,2,3] 陈飞翔 可奥[1,2,3] 杨兴 张园园 胡骏 ZHANGZhao-kun;CHENFei-xiang;KEAo;YANGXing;ZHANGYuan-yuan;HUJun(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan,Hubei 430040,China;CCCC Wuhan Harbour Engineering Design and Research Co.,Ltd.,Wuhan,Hubei 430040,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [3]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040 [4]中交武汉港湾工程设计研究院有限公司,湖北武汉430040

出　　处：《中国港湾建设》2020年第9期22-25,共4页China Harbour Engineering

摘　　要：以深中通道钢壳沉管自密实混凝土浇筑为研究背景,通过单仓缩尺模型试验验证了自密实混凝土配合比的工作性,掌握了混凝土浇筑时缺陷产生的位置和原因,并采用图像二灰度处理法和石粉填充法测试了混凝土浇筑顶面的缺陷面积占比、体积占比、最大/平均缺陷深度、主要缺陷分布等参数,较大缺陷往往集中出现在下料口附近、顶面加劲肋背面,为钢壳沉管自密实混凝土的后续施工提供了数据支撑。Taking the self-compacting concrete pouring of steel shell immersed tubes in Shenzhen-Zhongshan Channel as the research background,the workability of the self-compacting concrete mix ratio was verified by the single-bin scale model test,and the location and cause of the defects during the concrete pouring were grasped.The ratio of defect area and volume,the maximum/average defect depth,the main defect distribution and other parameters of the top surface of the concrete pouring were tested by using two-level grayscale processing method and the stone powder filling method,the larger defects are often concentrated near the blanking opening and the back of the top stiffener,which provides data support for the subsequent construction of the steel shell immersed tube self-compacting concrete.

关 键 词：钢壳沉管 自密实混凝土 单仓缩尺模型 缺陷表征 

分 类 号：TU528.2[建筑科学—建筑技术科学] U455.46[建筑科学—桥梁与隧道工程]