...I import a track file
from the Trimble Access
Track Gauge Survey app
to T4D Rail and the track
is automatically created.
The whole track is defined
in a few minutes, and we can
start monitoring."
Collecting
as-built
data using
the Trimble
Access Track
Gauge Survey
app and the
Trimble S9
total station.
Having as-built data you can rely on is an indispensable
starting component of the project, and using the
above-mentioned solutions allows you to simply export all
the collected as-built data into a track file and use it in T4D.
Prior to investing in T4D Rail, the GEOGRID AG team would
manually calculate the prism offsets from the rail and put all
that data in a spreadsheet. "When the area to be monitored
is greater than say 200-300 meters, that takes a lot of time.
I would often spend up to a full day defining a long rail
segment. The risk of error is high," said Berchtold.
"That entire workflow is streamlined and automated with
T4D Rail. I import a track file from the Trimble Access Track
Gauge Survey app to T4D Rail and the track is automatically
created. The whole track is defined in a few minutes, and we
can start monitoring," he concluded.
GEOGRID AG invested in Trimble
®
4D Control
™
(T4D)
deformation monitoring software and then expanded
their package with the T4D Rail software module in 2022,
but this was the first time they had deployed it so quickly.
Read more on their experience with T4D.
"We installed four total stations and 180 monitoring prisms,"
Berchtold continued. "We measured the rail position with the
Trimble
®
Access
™
Track Gauge Survey app and uploaded it to
T4D Rail, which allowed us to monitor horizontal and vertical
displacements, as well as twist and the versines." Swiss
Federal Railways, the regional rail authority for GEOGRID AG,
requires these rail parameters as deliverables.
If the as-built survey is available, although the same prisms
are being measured, parameters can also be calculated using
the actual coordinates of the rails since the as-built survey
data is used to get from the measured prism to the rail.
Leveraging the Trimble GEDO system or the Trimble Access
Track Gauge Survey app alongside Trimble S- or SX-series
total station instruments streamlines and advances the
accuracy of rail as-built surveys, which directly impacts the
quality and reliability of subsequent monitoring results.
5 ways to keep rail monitoring projects on track 4
