阐述超前大管棚支护设计与施工在南山隧道岩溶处理过程中的应用，重点介绍大管棚支护的施工工艺、安全措施及效果评定等。工程实践表明，以大管棚为超前预支护的方法在充填型岩溶处理中是有效的，其成功经验对后续工程有指导作用。

The design and construction of the large piperoof advance reinforcement applied in the treatment of the karsts in Nanshan tunnel are presented in the paper, with the emphasis being placed on the presentation of the construction process, safety control measures and effect assessment of the large piperoof reinforcement. The engineering practice proves that the large piperoof advance reinforcement technology is effective in the treatment of the filling karst caves. The successful engineering experience can provide reference for similar works in the future.