1. Gong Jiangfeng, Wang Wei, Li Xu, et al. Statistics of railway tunnels in China by the end of 2022 and overview of key tunnels of newly opened projects in 2022 [J]. Tunnel construction (English and Chinese).2023,43(4):721-738, 35- 52.W.-K. Chen, Linear Networks and Systems (Book style). Belmont, CA: Wadsworth, 1993, pp. 123–135.
2. The Ministry of Transport of the People's Republic of China. 2022 statistical bulletin of transportation industry development [EB/OL].https://xxgk.mot.gov.cn/2020/jigou/zhghs/202306/t20230615_3847023.html
3. The development trend of China highway tunnel in recent 10 years and thinking [J]. China journal of highway and transport, 2020 (12) : 62-76. The DOI: 10.19721 / j.carol carroll nki. 1001-7372.2020.12.005.
4. Yang Lingzhi, Fang Enquan. Review and development trend of structural disease detection technology of rail transit tunnel [J]. Urban Rapid Transit.2017,30(1):20-25,76.
5. FLEMING G. Highway and Rail Transit Tunnel Inspection Manual [2003] [J]. 2003.