As the excavation process which digs the application mannered null heading surface

摘要

PROBLEM TO BE SOLVED: To reduce construction periods, and to improve execution precision by easily measuring sections, and evaluating and managing excavation sections and lining sections without complicating work in tunnel excavation constructions.;SOLUTION: An execution cycle including processes of excavation, muck removing work, chiselling, and lining is repeated, and a three-dimensional laser scanner 100 is installed at the rear of a face plane 1 at least before or after chiselling or lining for three-dimensional measurement. Anchors for removably fitting a target 300 having tunnel coordinates are embedded to a plurality of places on a tunnel wall surface 3. The target 300 is fitted to the anchors to perform three-dimensional measurement by the three-dimensional laser scanner 100. Scanner coordinates, tunnel coordinates, and measurement section coordinates of the target 300 are acquired. The coordinates of measurement sections are converted to tunnel coordinates, based on the scanner and tunnel coordinates of the target 300 for comparison with the reference section, and information on the compared sections is output.;COPYRIGHT: (C)2010,JPO&INPIT