To develop a site to be ready for mining within two
years of approval.
approximately 130km of rail track, including new concrete sleepers, formation
earthworks, drainage and services for the Adelaide Metropolitan rail network.
All design and construction work associated with the $200M project was
undertaken by the Tracksure Joint Venture, which primarily comprised the John
Holland Group, Coleman Rail and York Civil.
JBT Consulting provided
specialist drainage design services to the joint venture.
Quick and accurate measurement of drainage quantities was a critical issue for
the Tracksure construction team, for both pricing and procurement purposes.
On previous smaller projects, Tracksure staff would manually: measure pipe
lengths and pipe depths, count drainage structures, assess drainage structure
arrangements and enter all of this information into a drainage schedule
This process was time consuming and prone to operator error,
and the output was not standardised. Tracksure wanted a better process for this
project, something that did not require manual measurement of drainage system
For this project, JBT
developed a more automated process for drainage system scheduling, utilising the
standard output reports from the 12d Drainage module. All subsurface drainage
systems were modelled and designed in 3D, using the 12d Drainage module.
The drainage designs were still documented on general arrangement plans and
longitudinal sections, as per the attached drawing examples. However, additional
drainage scheduling information was also presented in separate drawings.
The drainage schedules documented every drainage structure and conduit, and
totalled the different conduit lengths and different structure types. This
drainage scheduling information made it very easy for the Tracksure team to
price the entire drainage system in one simple step, as the schedules included
every drainage system element. It also made procurement easy, as the drainage
schedules included information on drainage structures, including type, size,
depth, and arrangement of pipe penetrations.
The drainage schedules were
automatically generated using a specially prepared spreadsheet (after the
standard 12d Drainage reports were pasted in to the spreadsheet). The
spreadsheet incorporated two lookup tables, one for the drainage structures and
one for the drainage conduits.
The spreadsheet then generated the
drainage schedules automatically, by reading the “raw” information input from
the standard 12d Drainage reports. Cross referencing the lookup tables occurred
to add extra information, and then populating the actual drainage schedule
The drainage structure schedules included information listing the
structure label and description, setout coordinates, surface levels, invert
levels, depth, reference drawings, additional comments and pipe penetration
details (pipe size and invert level).
The drainage conduit schedules
included information listing the conduit link (US struct – DS struct), conduit
description, length, diameter (size), average depth, reference drawings and
The drainage schedules also totalled the overall
conduit lengths for each conduit size and class and totalled the overall number
of structures for each different structure type. These totals enabled the
Tracksure construction team to quickly and accurately determine the overall
scope of the drainage works for each package, without even needing to look at
the drainage layout plans or the drainage longitudinal sections.
drainage schedule spreadsheets were actually provided to Tracksure so that the
team could easily prepare the quantities take-offs, without really even needing
to look at the drainage design drawings.
The Tracksure construction team was appreciative
of the high standard of drainage scheduling information which was able to be
provided during the project. The team members had been advised that their
demonstrated process would be adopted on future projects as an example of high
quality presentation and documentation.
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