Another big win for Land Surveys!

Perth Underground Rail Network

The ongoing growth of development projects in the Perth CBD brings an increase in overlap between neighbouring third-parties, nearby construction activities, and existing infrastructure. 

To manage and measure the impact of adjacent projects on their critical assets, the Public Transport Authority of WA (PTA) has engaged a group of experienced tunnel surveying and monitoring specialists to acquire and interpret geospatial and geotechnical data.

Land Surveys has been working closely with the PTA for many years, including the application of market leading instrumentation and monitoring projects as well as geospatial data capture across their assets. 

Due to this close relationship and previous successes, Land Surveys has been awarded the reality capture and instrumentation and monitoring services package of the Perth Underground Rail Network. 

Reality Capture 

Land Surveys will capture and develop a georeferenced photo-realistic 3D model of the various tunnels in the Perth underground network with custom developed hardware and software.

The high accuracy geospatial data delivered as part of this project will allow PTA to better understand the condition of the tunnel assets as well as form an accurate single-point-of-truth for operational divisions, consultants, and contractors.

From this data, PTA will be able to locate, identify, map, and monitor any visible defects in the tunnel with the project data, as part of a defect management process.

The digital data will also allow for remote inspection of the assets which would reduce tunnel closure times and ensure operational teams have a clear understanding of the site prior to entry. 

Instrumentation and Monitoring

Land Surveys together with Geomotion Australia and VBI Group will be working alongside Tetra Tech Coffey on an initial 4-year contact to meet the ongoing instrumentation and monitoring requirements of the PTA’s underground rail and bus tunnel networks.

Remote monitoring systems are to be designed, supplied, installed, commissioned, operated, maintained, decommissioned, dismantled, and eventually removed throughout the overlapping life cycles of current and future construction activities surrounding the PTA tunnels and structures. The monitoring systems will predominantly comprise of automated robotic total stations (ATS) for monitoring of 3D deformation supplemented with structural monitoring sensors such as crack-meters, strain gauges and vibration meters. 

The proactive and forward-thinking approach to asset management by the PTA will call for a sector-based monitoring scheme to be designed and implemented across all the underground assets with the ability for one or more sectors to be enabled, disabled, or set to various operational phases in line with the PTA’s need for data. 

The modular sector-based system implementation will result in improved utilisation of resources, greater flexibility, and a significantly reduced data enablement lead-time with the ability to have monitoring sectors operational in days rather than months.

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