Atkins introduced building information modelling (BIM) to fully understand the structure and the local environment, and to map anticipated changes in condition over time.


A 3D intelligent model provided a visual representation of the elevated structure and provided detailed understanding of the construction challenges. The model incorporated LIDAR survey data to provide an accurate representation of the elevated structure, as well as demonstrating the interaction with the A4 dual carriageway below. The model covered all aspects of the scheme including current condition, prioritisation for structural intervention, existing reinforcement and strengthening arrangements, and proposed drainage improvements.


The BIM environment supports whole life asset management. To facilitate this, each element within the model had a unique identifier to which data was linked or directly embedded. Consequently, data could be accessed through the model, which accurately reflected the location of interest.


A time-based criteria showing future deterioration of the crossheads was also developed, to clearly identify when intervention or repairs would be necessary for forward planned maintenance. Records were directly referenced to the structural elements, within a common data environment.


BIM also helped the team visualise the impact the strengthening works would have on the travelling public. The M4 site is severely restricted because of its proximity to the A4. BIM was used to assess and identify ways of managing the traffic, which led to programme, health and safety, and cost benefits. It is expected that the approach taken on this scheme could be readily developed for other construction and asset management projects.


Benefits


Identifying interaction between different disciplines, such as drainage and strengthening


Prioritisation of future works, supporting future maintenance and operations


Visualisations for traffic management, resulting in programme efficiencies


Planning of work through 4D time lining


Identification of health and safety aspects of the construction work


BIM was used to assess and identify ways of managing the traffic, which led to programme, health and safety, and cost benefits.


To find out more about Atkins and our capabilities contact: Chris Brock


Project manager


Tel +44 (0)1372 756360 Email chris.brock@atkinsglobal.com www.atkinsglobal.com/uk


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