摘要
为实现纤维编织网增强混凝土(textile-reinforced concrete,TRC)快速加固盾构隧道的目的,开发了一种用于TRC的磷酸无机复合类早强型基体材料.通过单轴压缩、坍落流动度、界面拉伸和剪切试验,对比分析了这种早强型基体材料与TRC传统基体材料——精细混凝土的工作性能;采用扫描电镜分析了其作用机理,并提出了力学作用模型.结果表明:与精细混凝土相比,早强型基体材料具有更优异的自密实、黏结以及渗透纤维编织网的能力;采用早强型基体材料的TRC加固方法可实现快速加固,在2h内即可发挥加固作用,具有广泛的应用前景.
To strengthen the shield tunnel rapidly,a kind of matrix material with early strength for textilereinforced concrete（TRC）was developed.The performances between the early strength matrix material and fine-grained concrete commonly used for TRC were analyzed by conducting uniaxial compression,slump-flow,and interface uniaxial tensile and shear tests.Then,the mechanism of the different materials was revealed by SEM and the mechanical models were proposed.The results show that compared with fine-grained concrete,the early strength matrix material has more perfect self-compacting,penetration and bonding properties;TRC with early strength matrix material show quick strengthening in 2h,and the purpose of rapid strengthening is realized and extensive application prospect is expected.
作者
刘德军
黄宏伟
左建平
薛亚东
LIU Dejun HUANG Hongwei ZUO J ianping XUE Yadong(School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, Beijing 100083, China State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing, Beijing 100083, China Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2016年第5期888-895,共8页
Journal of Building Materials
基金
国家自然科学基金资助项目(51508584)
国家重点基础研究发展计划(973计划)项目(2011CB013800)
关键词
纤维编织网增强混凝土
盾构隧道
基体材料
早强
黏结性能
破坏模式
textile-reinforced concrete（TRC）
shield tunnel
matrix material
early strength
bonding property
failure mode
