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公路隧道衬砌混凝土高抗中性化提升技术研究
Promoting Technology Study on High Anti-neutralization of Vehicle Tunnel Lining Concrete
2017年第9期
公路隧道;衬砌混凝土;抗中性化;复合酸性气体;有效养护
Vehicle tunnel; Lining concrete; Anti-neutralization; Compound acid gas; Effective curing
2017年第9期
1000-4637(2017)09-25-06
国家自然科学基金项目(51308308); 水利部水科学与水工程重点实验室项目(YK914015);广东省滨海土木工程耐久性重点实验室开放基金项目(GDDCE16-06
巴明芳1,2,薛 涛2,李永强2
1.南京水利科学研究院水利部水科学与水工程重点实验室,210000; 2.宁波大学建筑工程与环境学院,315000)

巴明芳1,2,薛 涛2,李永强2

巴明芳,薛涛,李永强.公路隧道衬砌混凝土高抗中性化提升技术研究[J].混凝土与水泥制品,2017(9):25-30.

BA M F, XUE T, LI Y Q.Promoting Technology Study on High Anti-neutralization of Vehicle Tunnel Lining Concrete[J].China Concrete and Cement Products,2017(9):25-30.

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摘 要:公路隧道衬砌混凝土在承载和复合酸性气氛共同作用下的中性化侵蚀不容忽视。研究了江底公路隧道的抗中性化分析预测及公路隧道衬砌混凝土抗中性化的影响参数,并基于荷载水平和复合酸性气氛条件对衬砌混凝土抗中性化水平进行数值分析,提出了公路隧道衬砌混凝土的抗中性化提升技术;然后确定了公路隧道高抗中性化衬砌混凝土临界最大连通毛细孔隙率为9.15%,氢氧化钙含量至少要大于等于环境温度条件下的溶解度,并最终提出了公路隧道高抗中性化衬砌混凝土的设计方法及制备要点,从而为公路隧道抗中性化衬砌混凝土的设计和制备提供依据。 Abstract: The neutral erosion of lining concrete in vehicle tunnel under the condition of comprehensive load and compound acid gases is noticeable. The anti-neutralization analysis and prediction of an under-river tunnel lining concrete were discussed, and the neutral depth was modified based on the effect of load level and composite acid gas. Then the anti neutral level was analyzed by a numerical way. Furthermore, the technology of enhancing the anti-neutralization of vehicle tunnel lining concrete was put forward. Finally the micro-structure parameters of high resistant neutral lining concrete were determined such as the limited capillary porosity not higher than 9.15% and the limited content of Ca(OH)2, and the design method and key points of preparation of the high anti-neutral lining vehicle tunnel concrete were proposed so as to provide basis for the design and preparation of anti-neutral vehicle tunnel lining concrete.
英文名 : Promoting Technology Study on High Anti-neutralization of Vehicle Tunnel Lining Concrete
刊期 : 2017年第9期
关键词 : 公路隧道;衬砌混凝土;抗中性化;复合酸性气体;有效养护
Key words : Vehicle tunnel; Lining concrete; Anti-neutralization; Compound acid gas; Effective curing
刊期 : 2017年第9期
DOI :
文章编号 : 1000-4637(2017)09-25-06
基金项目 : 国家自然科学基金项目(51308308); 水利部水科学与水工程重点实验室项目(YK914015);广东省滨海土木工程耐久性重点实验室开放基金项目(GDDCE16-06
作者 : 巴明芳1,2,薛 涛2,李永强2
单位 : 1.南京水利科学研究院水利部水科学与水工程重点实验室,210000; 2.宁波大学建筑工程与环境学院,315000)

巴明芳1,2,薛 涛2,李永强2

巴明芳,薛涛,李永强.公路隧道衬砌混凝土高抗中性化提升技术研究[J].混凝土与水泥制品,2017(9):25-30.

BA M F, XUE T, LI Y Q.Promoting Technology Study on High Anti-neutralization of Vehicle Tunnel Lining Concrete[J].China Concrete and Cement Products,2017(9):25-30.

摘要
参数
结论
参考文献
引用本文

摘   要:公路隧道衬砌混凝土在承载和复合酸性气氛共同作用下的中性化侵蚀不容忽视。研究了江底公路隧道的抗中性化分析预测及公路隧道衬砌混凝土抗中性化的影响参数,并基于荷载水平和复合酸性气氛条件对衬砌混凝土抗中性化水平进行数值分析,提出了公路隧道衬砌混凝土的抗中性化提升技术;然后确定了公路隧道高抗中性化衬砌混凝土临界最大连通毛细孔隙率为9.15%,氢氧化钙含量至少要大于等于环境温度条件下的溶解度,并最终提出了公路隧道高抗中性化衬砌混凝土的设计方法及制备要点,从而为公路隧道抗中性化衬砌混凝土的设计和制备提供依据。

Abstract: The neutral erosion of lining concrete in vehicle tunnel under the condition of comprehensive load and compound acid gases is noticeable. The anti-neutralization analysis and prediction of an under-river tunnel lining concrete were discussed, and the neutral depth was modified based on the effect of load level and composite acid gas. Then the anti neutral level was analyzed by a numerical way. Furthermore, the technology of enhancing the anti-neutralization of vehicle tunnel lining concrete was put forward. Finally the micro-structure parameters of high resistant neutral lining concrete were determined such as the limited capillary porosity not higher than 9.15% and the limited content of Ca(OH)2, and the design method and key points of preparation of the high anti-neutral lining vehicle tunnel concrete were proposed so as to provide basis for the design and preparation of anti-neutral vehicle tunnel lining concrete.

关键词:
公路隧道;衬砌混凝土;抗中性化;复合酸性气体;有效养护
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(1)根据公路隧道的环境条件,对其服役期间的中性化深度进行了数值计算和试验验证分析,并根据管片混凝土保护层厚度及酸性气体浓度分布的随机性,提出了隧道衬砌混凝土抗中性化水平的随机性特点。
(2)基于隧道管片混凝土内部材料微观参数及不同酸性气体浓度条件下中性化速度的变化分析,提出要保证有效充分养护,提高保护层混凝土质量及加强隧道内部通风,以提高公路隧道管片混凝土的抗中性化性能。
(3)基于对某江底隧道微观结构及抗中性化性能的研究,提出了高耐久性公路隧道预制管片混凝土设计方法,并从配合比优化微观结构参数、提高养护工艺两个方面总结了公路隧道高耐久性管片混凝土的制备要点。
 
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巴明芳,薛涛,李永强.公路隧道衬砌混凝土高抗中性化提升技术研究[J].混凝土与水泥制品,2017(9):25-30.

BA M F, XUE T, LI Y Q.Promoting Technology Study on High Anti-neutralization of Vehicle Tunnel Lining Concrete[J].China Concrete and Cement Products,2017(9):25-30.

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