中文摘要：

由于连拱隧道结构复杂，施工工序较多，一般用于中短隧道，不可避免地要遭遇到边坡问题。一旦边坡出现蠕动变形或滑动，连拱隧道的结构难以抵抗此下滑力，此时连拱隧道可称之为滑坡连拱隧道。滑坡连拱隧道的破坏形式和边坡变形、运动方式有关，滑坡可直接破坏连拱隧道的主体结构及其附属结构。在施工影响下边坡（错落）缓慢蠕动时，其破坏方式主要有不均匀偏压变形、拱圈错位、衬砌裂缝、中墙偏移以及内支撑焊点跳开等。本文结合两座典型滑坡连拱隧道的现场监控量测工作，讨论了滑坡连拱隧道的破坏规律和特征，对于连拱隧道的设计、施工和监测都具有重要参考意义。

英文摘要：

Twin-arch structure is commonly employed for short or middle length tunnels, and due to for its complicated structure and construction procedure, it is often unavoidable to face slope or landslide problems. Once a slope starts to slide or deform continuously, the tunnel structure may not be capable of resisting the sliding force alone, and in such cases the twin-arch tunnel can be called landslide twin-arch tunnel. The deformation and damage of twin-arch tunnels depend on the movement of the slope. Once a landslide starts to move quickly, the structure of a twin-arch tunnel may be damaged completely. For a slope that moves slowly, the damage to the tunnel includes non-uniform deformation, dislocation of arch ring, lining crack, offset of middle wall and inner steel support spot weld, etc. The damage characteristics of twin-arch tunnels are discussed using the monitoring results of two expressway twin-arch tunnels.