‘Live BIM’ advances efficiency of Swedish rail project

A Swedish rail project initially started in 1992 is finally close to completion thanks to enhanced use of Building Information Modelling.

Informing Infrastructure have spotlighted long-standing plans to create a railway passage through Sweden’s Hallandsås ridge, which is only on course for its late 2015 opening target thanks to a heightened use of BIM.


Due to the demanding nature and tight schedule of the project (which was once shelved in 1997 before being restarted in 2003) and it’s various environmental problems, Trafikverket, the Swedish Transport Administration chose to enhance the use of BIM to accelerate the development and get it back on track.


Trafikverket drafted in Sweco Infrastructure AB to strategise the use of BIM and help co-ordinate the build in-order to “optimize production, develop integrated 3D models through a collaborative design process, and use that information throughout the project lifecycle.”


Technology strategist for Trafikverket Leif Malm spoke about the decision to increase the use of BIM: “Trafikverket have been using BIM techniques and methods since 1994 for its rail projects but concluded that increasing its level of BIM adoption would help improve productivity and reduce rework on the Hallandsås project.”


Using software such as Bentley Rail Track, InRoads and MicroStation, Sweco fed ‘as-built’ data into their BIM 3D model at regular intervals, allowing the team carrying out the work to be regularly updated with the latest design and engineering information from the site.


“We call that ‘Live BIM’ – to use information from the on-going production as basis for impact assessments and adjustment of the engineering,” said Daniel Ahnsjö, a Sweco team manager and BIM strategist.


Due to this constant outpour of information, co-ordination have improved vastly, with “200 non-constructible conflicts and 3,000 unique collisions” being detected and resolved at the design stage, reducing additional costs caused by the correction of design faults by 50%.


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