由于设计、施工、工程地质等方面的自然及人为因素,山岭隧道衬砌开裂、渗漏水等现象时有发生,给隧道施工、安全运营均带来较大隐患。本文研究了隧道衬砌裂损变形原因,并针对桃树垭隧道初期衬砌开裂情况,提出了加固方案,监测数据分析和加固验算都显示出桃树垭隧道加固措施的可行性及可靠性。 Due to natural and man-made factors such as design, construction and engineering geology, the phenomena such as cracking of tunnel linings and seepage water in mountain tunnels occur from time to time, posing great risks to tunnel construction and safe operation. In this paper, the causes of cracking and deformation of tunnel lining are studied. According to the initial lining cracking in Taoshuya Tunnel, a reinforcement scheme is proposed. Both the monitoring data analysis and reinforcement calculation show the feasibility and reliability of the reinforcement measures.