Adelaide Metropolitan Rail - JBT Consulting Pty Ltd

ClientDepartment of Transport, Energy and InfrastructureLocationAustralia, SA
ConsultantJBT Consulting Pty LtdContractorBrad Tite
To develop a site to be ready for mining within two years of approval.

Project Summary
Upgrade of 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.

The Challenge
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 spreadsheet.

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 elements.

The Solution
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 sheet.

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 additional comments.

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.

The 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 Result
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.


Download this Case Study as a PDF HERE