Construction on the €368m line began in 2013 and was delivered on time and on budget in late 2017
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This weekend was the first anniversary of the opening of the Luas Cross City extension project, one of Ireland’s largest infrastructure projects to date which links the Green and Red Luas lines in Dublin city. The project comprised of 5.9km of track, adding 13 new stops, eight of which are in the city centre. Construction on the €368m line began in 2013 and was delivered on time and on budget in late 2017. The project won the accolade of Best Project in the Civil Engineering Category at the inaugural Irish Construction Excellence Awards in 2018.

Murphy Surveys played a critical role in the success of the project, delivering surveying and engineering services for the entire development. Our Head of Digital Construction, Michael Durnin, acted as Chief Surveyor with SS JV and oversaw all aspects of survey and geospatial data collection including establishing a control network, setting out, deformation monitoring and subsurface mapping.

“We engaged early with the client during the pre-construction stages, and already had a strong professional relationship with Sisk Group and collaboratively, we have and continue to work on multiple construction and infrastructure projects,” comments Michael.

“Technical sensor driven solutions were offered on this project as an alternative to a typically manual monitoring process reducing cost and automating the data capture process. Data management workflows were also integrated for all design data used by field surveyors, increasing on-site efficiencies, with site staff quoting up to two hours a day saved due to productivities gained. The teams provided the scale and technical expertise the client and project required whilst managing and taking ownership of all geospatial work.”

Challenges during the project included TII’s construction specifications. 1mm relative change over 1m of track were extremely tight tolerances for rail construction. 1:60,000 linear accuracy and 5√k for control are both very difficult to achieve in a heavily urbanised environment and in phased construction works.

The specification also included localised variables for paving under tight constraints where real-time decisions against design needed to be made for surveyors setting out in the field. Deformation monitoring of national monuments and retaining walls in the urbanised environments and heavy work zones had trigger values of 2.5mm.

Despite facing tight constraints and the challenges of such a large and complex site, the survey works were completed to a high standard as per specification and to client’s expectations. Once the Luas Cross City line was opened, Michael and the team continued to work with our client to capture asset information and conduct topographic surveys.

For more information on our work on this project and our Digital Construction services, contact Michael on 045 484 040 or mdurnin@murphysurveys.ie.

http://www.engineersjournal.ie/wp-content/uploads/2018/12/lcc-1.pnghttp://www.engineersjournal.ie/wp-content/uploads/2018/12/lcc-1-300x300.pngJames HarringtonSponsoredLUAS
This weekend was the first anniversary of the opening of the Luas Cross City extension project, one of Ireland’s largest infrastructure projects to date which links the Green and Red Luas lines in Dublin city. The project comprised of 5.9km of track, adding 13 new stops, eight of which...