PROJECT APPLICATION
OFFICE COMPLEX PLANNED ENTIRELY IN 3D The project also uses digital solutions for formwork positioning and concrete monitoring. When the Citygate office complex in Göteborg, Sweden, was designed, the planners were not just thinking about square metres and building height, they also placed great importance on sustainability. As well as being a new landmark for the Gårda business district, the building will be a flagship for ecological construction and social responsibility. For example, using special ‘green concrete’ will save 250 t of carbon dioxide. The façade is being made from recycled aluminium, thus saving natural resources. The plans are intended to secure LEED (Leadership in Energy and Environmental Design) certification for the completed building. Ecological building construction is not the only important issue for Skanska, the project’s developer and construction contractor. The well-being of the future users has equal priority, and Citygate will receive the WELL Building Standard certification on completion. To meet this standard, the building must meet several requirements, such as good access to daylight and electric lighting with appropriate colour temperatures. BIM (Building Information Modelling) is also playing a significant role in the construction process. Using BIM, buildings can be planned, built and operated more efficiently and by using fewer resources. Defined procedures and processes were established in the early project stage. The 3D formwork planning for the building, that the BIM experts drew up, was particularly important for providing crucial input about feasibility and savings potential at an early stage, thus helping the customer to optimise processes.
planning delivered by Doka seamlessly into its own Revit model. A digital collaboration network of project participants was set up in the construction project management software BIM 360, which provided all participants with a shared 3D model that everyone could access without the need for any other custom software. This meant that clashes could be identified earlier (e.g. between the insert-moulded horizontal and vertical tensioning cables for prestressing) and eliminated before execution.
DokaXact and Concremote save time and ensure accuracy
Before the official start of construction, engineers from Skanska, Doka (who provided the formwork solutions) and Alimak (who provided the construction hoist) were able to move virtually through the 3D building core, inspect the Doka SKE50 automatic climbing formwork in detail, and clarify interaction with the construction hoist to ensure access at every construction stage.
DokaXact has a decisive role in achieving workflow efficiency and ensuring precise construction of Citygate's building core. The system is based on measurement sensors installed at predefined points of the formwork, communicating wirelessly with a central processing unit. Surveyors and the site construction team use DokaXact to quickly and accurately position the wall formwork on the automatic climbing system.
However, before reaching this phase, Doka's BIM experts created 3D formwork solutions using the DokaCAD for Revit planning software. DokaCAD for Revit is an Autodesk Revit plug-in that allows native, automated formwork planning in BIM software. One of the major advantages in using this system was that the customer was able to integrate the formwork
Using the DokaXact app, which guides the construction site team through the process, step by step, the formwork can be positioned for the next concreting
3D planning and digital project management
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Citygate, a 144 m office complex in Gårda, Göteborg, Sweden, will be completed in 2021. Image: Skanska.
THE SINGAPORE ENGINEER November 2020
“DokaXact makes life easier for the surveyors, who do not have to be present as often during adjustment of the formwork panels. That saves time”, said Niklas Jarlström, Production Manager, Skanska.
