DOI: 10.5593/SGEM2016/B22/S09.089


R. Urban, T.Jirikovsky
Thursday 8 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-59-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book2 Vol. 2, 689-696 pp

The accuracy of direction is the main problem in tunnel measurement. In many cases is
used for determination of direction and length tunnel the spatial network, where points
are stabilized in the side of tunnel in profile. The paper presents new tunneling
measurement in the Underground Education Facility Josef (UEF Josef) of Czech
Technical University near Mokrsko, Czech Republic. The direction and length of tunnel
with high accuracy was determined in 2013. For new determination of direction and
length of part of the tunnel the spatial network was used. The spatial network in the
tunnel was realized by points, which were stabilized in profiles and signalized by
precise reflective prisms. New direction of the tunnel is determined by measurement
from free stations between profiles, where the one-man total station Trimble S8 HP was used. Before the measurement the a priori analysis was done in special software
PrecisPlanner 3D and for complex processing and the adjustment it was used the special geodetic software EasyNet, which enables the robust analysis of outliers. Main results are precision of automatic measurement in specific conditions in the tunnel and
comparison of old and new direction and length of the tunnel.

Keywords: geodesy, mine surveying, tunnel, spatial network, Trimble S8