Research purposes:The strong earthquake caused serious damage to the tunnels in disaster area，which seriously affected the progress of the earthquake relief and post-quake reconstruction. This paper, which is based on the seismic damage of the tunnels in Wenchuan earthquake as the research background，with the need of scientific reconstruction，and combined with the characteristics of the three stages，the first aid repair stage，ensure access stage， restoration and reconstruction stage，and the recovery goals of the tunnel structure，has studied the evaluation grade of seismic damage and disposal technologies of different stages of tunnel structure.
Research conclusions:(1)Established the evaluation grade of seismic damage of tunnel structure，mainly including the graded principles of the seismic damage degree of the tunnels，the evaluation grade of seismic damage of reinforced concrete and plain concrete secondary lining, and the treatment key point of seismic damage of the three stages，the first aid repair stage，ensure access stage，restoration and reconstruction stage.(2)Clarified the disposal technologies of seismic damage of tunnel lining structure of three stages，the first aid repair stage，ensure access stage，restoration and reconstruction stage.(3)The disaster area in Wenchuan earthquake used the evaluation grade of seismic damage and disposal technologies of tunnel structure for restoration and reconstruction after the earthquake，reached the goal of restoration and reconstruction，which recovered or over the level of operation and earthquake-resistant of the tunnels in the earthquake zone before earthquakes.(4)The research results can provide a reference for the repair of seismic damage of the tunnels in the earthquake zone and aseismic design of tunnel structure.
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