摘要
通过1∶10的模型试验,将公路隧道常见的两种内表面补强方式——粘贴钢板和粘贴碳纤维布加固的方法进行对比分析。试验在Ⅵ级围岩背景下进行,五种工况分别为原型试验和不同时机、不同加固方式的试验。试验表明:两种加固方式均可提升衬砌承载力,碳纤维加固提高的幅度更大;通过加固,结构刚度明显增加,通过碳纤维加固的结构刚度提高更多;但临近破坏时,粘钢由于其延展性会有一段缓冲期,这一点是碳纤维加固所欠缺的。另外,原型试验的剩余承载力与裂缝密度的对应关系可用于指导工程实践。
A comparative analysis of bonding steel and bonding carbon-fiber-reinforced plastics,which are two kinds of inner surface reinforcement of highway tunnel,is made by taking model test whose geometric similarity ratio is 10. Based on Ⅵ grade surrounding rock,the model test contains five working conditions： prototype test and reinforcement by different ways and in different time. The test draws two conclusions. Firstly,two kinds of reinforcement can both improve the bearing capacity of the lining,and reinforcement by carbon can improve more. Secondly,rigidity of structure by reinforcement is increased,also reinforcement by carbon can increase more. However,because of the good malleability,steel has a buffer period when structure is near failure,which does not exist in reinforcement by carbon. In addition,the corresponding relationship between bearing capacity and the fracture density of the prototype test can be used to guide the engineering practice.
出处
《科学技术与工程》
北大核心
2017年第34期130-135,共6页
Science Technology and Engineering
基金
国家自然科学基金(51478342
51278377)
国家"973"计划(2015CB057806)资助
关键词
隧道内表面补强
Ⅵ级围岩
粘贴钢板加固
碳纤维加固
二次受力
模型试验
对比试验
inner surface reinforcement of tunnel
Ⅵ grade rock
bonded steel plate reinforcement
carbon-fiber reinforcement
secondary load
model test
comparative experimental
