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钢管拱内混凝土超长距离泵送性能
作者: 文1 2  睿3  勇3 陈克坚4 魏志强3  正5 张倩倩2 刘加平1 
单位:(1. 东南大学材料科学与工程学院 南京 211189 2. 高性能土木工程材料国家重点实验室 南京 211103 3. 中国铁路总公司拉林铁路建设总指挥部 西藏 林芝 860114 4. 中国中铁二院工程集团有限责任公司 成都 610031 5. 广西大学土木建筑工程学院 南宁 530004) 
关键词:泵送阻力 润滑层 摩擦计 黏度常数 大流动性混凝土 
分类号:TU528
出版年,卷(期):页码:2019,47(11):0-0
DOI:
摘要:

 采用一种适用于大流动性混凝土的新型“摩擦计”,模拟测试了藏木大桥钢管拱内C60高强自密实混凝土沿泵管壁形成的润滑层屈服应力和黏度常数,分别约48 Pa和723 Pa?s•m–1,据此计算得到混凝土泵送阻力。设计了混凝土超长距离泵送试验钢管拱节段选取及泵管设置方案,分别测试了混凝土在泵管和钢管拱内的泵送阻力。结果表明:约30 m3/h排量下,采用基于滑流模式的Morinaga公式的泵管内混凝土泵送阻力计算值与实测值分别约19.8 kPa/m和20.6 kPa/m,误差不超过5%,钢管拱内则只有5.4 kPa/m,约为泵管内值的28%。

 
基金项目:
中国铁路总公司科技研究开发计划课题(2017G006-B);国家自然科学基金项目(51738004)
作者简介:
参考文献:

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