RESEARCH ON TREATMENT TECHNOLOGY OF LINING CRACKS FOR EXISTING EXPRESSWAY TUNNELS
With the rapid development of transportation infrastructure in China,the number of tunnels built and op-erated has become increasingly large,and the problem of tunnel diseases has become increasingly prominent.Among them,lining cracks are one of the most common tunnel structural diseases.At present,the research on tunnel lining cracks in China is still relatively general,and the treatment methods are also unilateral.This article relies on the Qinzhou Tunnel Project of the Tianding Expressway to conduct research on the treatment technology of lining cracks in existing highway tunnels.Based on factors such as tunnel engineering geology,tunnel construction,and maintenance,the causes of cracks in the Qinzhou Tunnel are analyzed,obtaining the results that geological factors,construction factors,and operational maintenance factors are the main influencing factors of cracks in Qinzhou Tun-nel.Targeted crack treatment and lining reinforcement are also carried out based on different conditions of diseases,achieving a good crack treatment and lining reinforcement effectiveness,providing the reference for the treatment of disease of expressway tunnels on similar highway tunnel lining.