measured data to the designs and provides the results
immediately on-site.
Gauche uses his tools (Trimble Access software, Trimble
S7 total station and Trimble TSC7 controller) to perform
the field surveys, providing data for reports generated by
external software packages. "In the office we use Trimble
Business Center (TBC) to compute the traverse, check and
average measurements," said Gauche. "And we use the TBC
Tunneling Module to create alignments and templates and
transfer them to Access."
THE SCANNING TOTAL STATION
Gauche also uses a Trimble SX10 scanning total station
for monitoring in the tunnel. "We measure control points
to check the convergence of the ring and determine if the
tunnel is moving," said Gauche. "We use it to survey the
vertical wall, ceilings and floors in the subway station. We
have used it to perform tunnel profiles as well." The SX10 is
Secured to special mounting hardware, a Trimble S7 provides measurements to monitor the progress and accuracy of tunnel construction.
Working in the TBM access trench, a surveyor captures data for
as-built analyses.
