Second liningoftunnel cracks is one of the most frequent diseases in the highway tunnel construction, which adversely impacts the project quality as well as traffic safety.
隧道二衬开裂是目前隧道工程中经常出现的病害，严重影响工程质量和交通安全。
2
The calculation of structural load on the liningoftunnel with shallow overburden shows that the load on composite lining will be shared by primary support and secondary lining.
隧道衬砌在浅埋段的结构荷载计算表明，复合式衬砌中的初期支护和二次衬砌一般要共同承担荷载。
3
These findings, backed up by other data collected from conventional inspections, led London Underground to investigate the replacement of the tunnellining.