In conjunction with all stakeholders, it was initially anticipated that the monitoring system would operate for an eight-week period while the basement excavation was completed on the development site adjoining to the Railway Station. With the low degree of excavation proposed, the required monitoring was prescribed as weekly observations.
The initial infrastructure monitoring system offered a semi-manual setup of the instrument for completion of robotic measurement rounds, as a means of minimising setup costs.
Monitoring prisms were fixed to the rail foot/webbing at set intervals through the required site length. Using the latest Monitoring Apps onboard our survey controller, field times were optimised to rapidly observe and adjust the precise position measurements of the rail. The measurement data was collected and analysed before being communicated to all reporting stakeholders.
Alerting criteria and procedures were designed to coincide with QR’s Civil Engineering Track Standards specifications.
Shortly after commencement, the geology encountered through excavation onsite showed that much more forceful excavation techniques would be required, triggering a higher level of monitoring on the rail infrastructure.
Land Solution Australia were able to re-assess and readily implement an automated system, providing around the clock monitoring over an extended period of heavy excavation.
The Senior Surveyor and Geotechnical and Monitoring Project Manager completed a pre-install inspection and laser scan survey to qualify the numerous constraints for a suitable automated Total Station install. Land Solution Australia provided two pillar location options to support the increased monitoring of the railway tracks.