Author(s): PENG Shu
Pages: 770-775
Year: 2016 Issue:  5
Journal: Resources Environment & Engineering
Keyword:  expressway tunnel; the second lining cracking; defect; analyze;
Abstract: During the construction of expressway tunnels,cracking of supporting structure is a very common defect that happens at the initial lining stage which is relatively easy to be dealt with. Compared to the initial lining stage,cracking at the secondary lining stage though rare,it however happens for more complex reasons,is more difficult to deal with,and has a greater impact on the overall structural safety of tunnels during construction and later operation stage. Thus,in or-der to prevent the formation of cracks and provide some guidance to future construction project,it has significant value to investigate thoroughly on the characteristics and causes of the cracking happens at secondary lining stage. In this paper, the causes and counter measures of cracking during the secondary lining stage of one tunnel that are part of Mazhu expre-ssway ( Yicheng to Baokang) have been discussed in detail,which can be referred by other projects.