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 rati-o is 10.Based onⅥgrade surrounding rock , the model test contains five working conditions:prototype test and re-inforcement by different ways and in different time .The test draws two conclusions .Firstly, two kinds of reinforce-ment can both improve the bearing capacity of the lining , and reinforcement by carbon can improve more .Second-ly, 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 re-inforcement by carbon .In addition, the corresponding relationship between bearing capacity and the fracture densi-ty of the prototype test can be used to guide the engineering practice .%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.
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