华东交通大学学报2017，Vol.34Issue(1)：28-32,5.
隧道混凝土结构使用寿命评价
Evaluation on Service Life of Tunnel Concrete Structure
摘要
Abstract
Focusing on the tunnel concrete structure service life evaluation, based on Fick's second law, the the-ory of concrete diffusion and the corresponding mathematics model, this study conducts a comprehensive analysis on factors affecting service life of the concrete tunnel structures. Results show that the predicted concrete service life is 102 to 105 years when the thickness of concrete protective layer is 55 mm;While the predicted concrete service life can reach 209 years and 248 years when the protective layer thickness is 70 mm. Therefore, it is necessary to strictly control the construction quality and guarantee the thickness of the protective layer. It sug-gests that the predicted service life of the concrete structure will increase with the increase of the protective lay-er thickness. Finally, the experimental results prove that adding a certain amount of fly ash in concrete and adding a certain amount of slag can significantly improve the service life of concrete. The results of the study are summarized to improve the life of the tunnel concrete measures and techniques, which has practical significance.关键词
隧道/高性能混凝土/寿命评价/扩散Key words
tunnel/high performance concrete/life evaluation/diffusion分类
建筑与水利引用本文复制引用
丁杨,邓文武,孟伟,陈衎..隧道混凝土结构使用寿命评价[J].华东交通大学学报,2017,34(1):28-32,5.基金项目
国家自然科学基金项目(511680115) （511680115）
