Abstract:

In order to improve the concreting efficiency, save the construction cost and reduce the difficulties in the mechanical connection of rebars, the technology of rebar connecting by sleeves is adopted in the rebar processing of the secondary lining of Baotaishan railway tunnel. The principle, test method, application technology, problems and countermeasures and application results of the technology are presented. Due to such advantages as high safety, high efficiency and low cost, the technology can be popularized in railway tunnels, highway tunnels, Metro works and other projects.

Key words: railway tunnel, lining rebar, rebar connecting by sleeve