隧道在施工过程中,由于地质不良、排水不畅、施工工艺不当等原因造成已经开挖部分隧道发生大的变形。工字钢变形、喷射混凝土开裂、净空收敛等现象,对隧道施工及将来运营产生一系列严重后果。本文通过对一典型隧道大变形进行处理,通过处理后满足设计、规范及运营需要。 During the construction of the tunnel, due to poor geological conditions, poor drainage, improper construction techniques and other reasons, some large tunnels have been excavated. The deformation of the H-shaped steel, the cracking of the shotcreting concrete and the clearance of the clearance space, have a series of serious consequences for the tunnel construction and future operation. In this paper, we deal with a typical large tunnel deformation and deal with the design, specification and operation needs.