Abstract: Exchanging humps is a quite thorough treatment of the serious diseases,which endanger safety,intrude the building gauge and hinder the service function of the tunnel.Its construction is quite difficult and technical procedures are quite complicated.The methods and the process of early branch and the lining of the arch are introduced.It can be reference for similar tunnels to exchange humps.

Key words: tunnel lining, cracking causes, exchange humps, project example

摘要： 换拱是对公路隧道在施工中和营运后发生的危及安全、侵入建筑限界、影响使用功能等较为严重隧道病害的一种较为彻底的病害处治措施,其荷载有较大的不确定性,设计、施工难度较大,技术流程较为复杂,在这分别介绍了初支、二衬的换拱过程和方法,且列举两处工程实例,可供类似隧道换拱参考。

关键词: 隧道衬砌, 裂损原因, 换拱, 工程实例