Exploration on Defect Prevention and Maintenance Methods of Highway Tunnel Structure

Highway tunnel traffic safety is an important part of traffic safety. With the aging of tunnels, increase in traffic flow, changes in the operating environment and traffic accidents, the many problems started to occur in tunnels, affecting the operational and structural safety. In this paper, we summarize and analyze the types and causes of defects found in the process of tunnel maintenance at home and abroad, and propose corresponding suggestions for the current maintenance of the main structure of highway tunnels.