一种可带模注浆的新型铁路隧道衬砌台车

摘要

In order to address quality defects of lining voids, cracking or spalling that occur in operating tunnels, and based on the practices of casting concrete by lining jumbos on site, a conventional tunnel lining jumbo is reno⁃vated and new technology is proposed for grouting of the secondary lining with molds . The stubborn void defects ex⁃isting in conventional secondary linings are solved by injecting the micro-expansion retarded mortar, characterized by good workability and early-strengthening, through an embedded RPC pipe, which improves the quality of the tun⁃nel lining and provides a solid support for safe tunnel operation in the future.%针对运营隧道出现衬砌空洞、开裂、掉块等质量病害原因，并结合现场衬砌台车灌注混凝土的实际情况，文章阐述了对传统隧道衬砌台车实施的改造，提出了二次衬砌带模注浆新工艺。通过预埋RPC注浆管并注入高流动性微膨胀早强缓凝充填砂浆，有效解决了传统二次衬砌空洞缺陷整治难的问题，极大地提高了隧道衬砌工程质量，为今后隧道的安全运营提供了可靠保证。