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http://dx.doi.org/10.7843/kgs.2015.31.10.29

Analyses of Existing Tunnel Liner Behaviors Caused by Excavation of Upper Layer with Using Laser Scanning Technology  

Park, Tae-Soo (Dept. of Civil Engrg., Sangji Univ.)
Lee, Seung-Ho (Dept. of Civil Engrg., Sangji Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.31, no.10, 2015 , pp. 29-36 More about this Journal
Abstract
This paper deals with inspecting and monitoring cracks developed on a subway tunnel liner during the construction of temporary supports and excavation. The cracks have developed near a enlarged part of the tunnel. Several measurements, crack gauge, internal displacement measurement, 3-D laser scanner have been conducted to monitor the progress of cracks and effects of them on the tunnel. Local measurement, additional propagation of cracks and deformation of liner, have been conducted by crack gauge and internal displacement measurement. Global inspection has been conducted by 3-D laser scanner. From the scanned data, occurrence of global deformation of tunnel and rail has been evaluated. Because of limited sequence of construction at the ground, no apparent deformation of crack propagation has been measured. As presented in this paper, deformation of tunnel liner and effects of rail need to be investigated in view of local and global aspects.
Keywords
Tunnel liner; 3-D laser scanning technology crack gauge;
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