BIM & PROJECT MANAGEMENT
The BIM Field Trip
Building Information Modelling (BIM) is about transforming how buildings and infrastructure are designed, constructed and operated. It has the potential to add value across all phases of a project, from design through to construction, argues Tahir Sharif, Leica Geosystems EMEA director of software solutions.
BIM
exploits the potential of digital modelling technologies to provide
a new way of designing buildings and infrastructure and managing the design and construction processes. This approach brings together geometry (lines and surfaces) and rich non-geometrical information (intelligent descriptions of components, materials etc.) in an open data environment. BIM, during the design and construction phases of a project, has the potential to create an ‘as-built’ virtual model of the built environment: a digital asset that can be exploited throughout the operational life of the built environment.
BIM is a process that keeps projects on time and on budget, reducing re-work and increasing predictability and profi tability. BIM has a solid return on investment with a 40% reduction in fi eld changes, contract savings of over 10% and project time reductions of over 7%.
Whilst BIM adoption is growing positively, the actual level of BIM use is mostly limited to quantity take off and co-ordination of multi-discipline activities at the offi ce, such as clash prevention. The number of ‘BIM uses’ is growing daily, including project management and construction sequencing. The full impact of BIM in the construction industry sector is yet to be realised.
There is a clear trend appearing around the uses of ‘BIM use’ outside of the offi ce. Moving from 2D plan co-ordination to 3D model co- ordination is usually the fi rst step. This allows contractors to spot and resolve potential problems. However, to fully maximise what BIM can do, it is important to connect the digital world to the real world.
Leica Geosystems is a market leader in providing fi eld solutions and is leading the way in helping to bridge this gap by taking BIM out of the offi ce and into the fi eld and vice-versa. Leica Geosystems BIM Field Trip is a comprehensive solution with hardware, software, service and support components that increases the BIM benefi ts for owners, contractors, architects and the various trades involved in the BIM process.
With renovation and retrofi t jobs on the rise, Leica Geosystems BIM Field Trip provides the cost-effective, complete and traceable georeferenced fi eld data using a unique class of ‘survey-grade’ high-defi nition surveying systems/3D laser scanners – known as ScanStation – to produce 3D point clouds that are consumed in a number of software environment through a unifi ed workfl ow and data architecture. Where projects require the effi cient capture and positioning of discrete points, the Leica Geosystems family of measurements sensors – from high-end total stations to handheld distos – come into play.
Within new construction, the BIM Field Trip uses total station and multi-station technol- ogy to replicate BIM layout points in the fi eld, providing accurate real world implementation. You cannot achieve this kind of effi ciency and accuracy with plumb bobs and tape measures, especially with today’s complex designs and de- manding construc- tion schedules.
3D laser scanners help to streamline workfl ows across a number of diverse industries. By allowing critical surfaces and environments to be measured with a level of confi dence and speed not possible with traditional tools, 3D laser scanners provide users with a way to deliver robust models that can be revisited digitally at any point in time.
BIM is a 3D parametric model, which means that the objects in the model have intelligence embedded (metadata) and understand a variety of parameters and relationships defi ned by the project team based on the BIM use for the project (level of development). Metadata can be automatically stored in the point cloud fi le format, or can be linked to the point cloud or the 3D model objects after the measurement process. With this approach BIM can offer virtually unlimited possibilities for integrating business intelligence with the project or asset management.
The Leica Geosys- tems BIM Field Trip technology of- fers a superior qual- ity assurance solu- tion with innovative multi-station technology that continues construction layout and high defi nition as-built scanning in a single hard- ware solution. As-built quality assurance point clouds are compared to the model to assess systems like MEP, providing insight critical to validate that buildings are being constructed as designed and evaluating potential issues at an early stage avoids rework in the fi eld.
3D laser scanning and high-defi nition surveying (HDS) as the foundation of BIM
As the equipment and service costs of laser scanning continue to decrease, the opportunity for leveraging 3D scanning in the construction sector is becoming even more tangible. Ultimately the technology of high-defi nition surveying (HDS) changes the way many construction professionals work.
“We are at the beginning of a fundamental change and digitisation of a very old industry.”
Today, HDS and BIM are technologies that have moved beyond concepts to being proven demonstrated projects
and in
executed
worldwide. The growing capability of this technology allows ‘BIM stakeholders’ to realise further gains through the deployment of such capabilities.
What is most exciting is that we are at the beginning of a fundamental change and digitisation of a very old industry and such change promises to deliver greater gains to the full cycle of construction and operations activities to come.
Whether you are a beginner, intermediate or an expert working with the BIM process, the Leica Geosystems BIM Field Trip will help you lower waste, work more effi ciently, reduce costs, increase profi t margins and maintain greater project safety.
www.leica-geosystems.com TELL US WHAT YOU THINK
rail technology magazine Jun/Jul 14 | 71
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