Three-dimensional laser scanning for geometry documentation and construction management of highway tunnels during excavation

Gikas, V

dc.contributor.author	Gikas, V	en
dc.date.accessioned	2014-03-01T02:14:51Z
dc.date.available	2014-03-01T02:14:51Z
dc.date.issued	2012	en
dc.identifier.issn	14248220	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30147
dc.subject	Construction management	en
dc.subject	Formwork	en
dc.subject	Geometry documentation	en
dc.subject	Laser scanning	en
dc.subject	LIDAR	en
dc.subject	Total station	en
dc.subject	Tunnel excavation	en
dc.title	Three-dimensional laser scanning for geometry documentation and construction management of highway tunnels during excavation	en
heal.type	journalArticle	en
heal.identifier.primary	10.3390/s120811249	en
heal.identifier.secondary	http://dx.doi.org/10.3390/s120811249	en
heal.publicationDate	2012	en
heal.abstract	Driven by progress in sensor technology, computer software and data processing capabilities, terrestrial laser scanning has recently proved a revolutionary technique for high accuracy, 3D mapping and documentation of physical scenarios and man-made structures. Particularly, this is of great importance in the underground space and tunnel construction environment as surveying engineering operations have a great impact on both technical and economic aspects of a project. This paper discusses the use and explores the potential of laser scanning technology to accurately track excavation and construction activities of highway tunnels. It provides a detailed overview of the static laser scanning method, its principles of operation and applications for tunnel construction operations. Also, it discusses the planning, execution, data processing and analysis phases of laser scanning activities, with emphasis given on geo-referencing, mesh model generation and cross-section extraction. Specific case studies are considered based on two construction sites in Greece. Particularly, the potential of the method is examined for checking the tunnel profile, producing volume computations and validating the smoothness/thickness of shotcrete layers at an excavation stage and during the completion of excavation support and primary lining. An additional example of the use of the method in the geometric documentation of the concrete lining formwork is examined and comparisons against dimensional tolerances are examined. Experimental comparisons and analyses of the laser scanning method against conventional surveying techniques are also considered. © 2012 by the authors; licensee MDPI, Basel, Switzerland.	en
heal.journalName	Sensors (Switzerland)	en
dc.identifier.doi	10.3390/s120811249	en
dc.identifier.volume	12	en
dc.identifier.issue	8	en
dc.identifier.spage	11249	en
dc.identifier.epage	11270	en