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BIM and 3D Laser Scanning ...

3D Laser scanning is the process that generates highly accurate location information to produce uniformly precise 3D models which later on can be utilized to repair, renovate, estimate the need for structural upgrade or seismic retrofitting, design visualization and optimize our infrastructure for a more sustainable future. So the progression of adapting old structures for new purposes or “adaptive reuse” in view of the current economic climate and sustainability efforts is possible with 3D laser scanning.

Today, Scan to BIM technology is utilized to converts unlimited points in the point cloud into useful data. One can get a set of asbuilt documents and modeled them in the point cloud. After that compare these drawings to the point cloud to carry out conflict detection instantly and find out prospective interferences. In this way one can save huge money as the problem is solved earlier in the construction process before being changed in the field. Besides some incurable mistakes in the proposed design can also be solved which could have not been detected and a totally new design will be required for submission.

The level of detail and the completeness that in many cases only laser scanning can provide

Now-a-days laser scanning combined with a BIM-centric process can support a building’s entire life cycle to a great extent. It develops resource efficiency of buildings, which is a basis of sustainability efforts today. The architect and engineers armed with this complete model can now create improved informed intervention early on the design stage and provide a real impact on design decisions for the future of the building or other infrastructure. Long term facility management systems can be arranged for future maintenance and upgrade projects.

Laser scanning can be applied to support the detailed documentation of the as-built to instigate a facilities program for the long-standing management of an asset. 3D laser scanning facilitates the provision for quick, precise as-built data of large, complicated, and often dilapidated buildings and their supporting infrastructure (water pipes, sewers, drainage, etc.). The as-built data is utilized for planning and design process mainly where sustainability and reprocess of existing infrastructure become an important factor in areas like energy refits. Designers are able to evaluate the prospective reuse of buildings as well as understand the original construction.

In a historical preservation project exclusive of laser scanning it is not possible to assure that the contractor is delivering the desired product.

By applying laser scanning combined with a BIM-centric process mechanical, electrical, and plumbing (MEP) spaces within the facility can be scanned and documented from several vantage points. These 3-D laser scans contained all accessible facilities and installed components as well as mechanical, electrical, and plumbing fit-outs; air handling duct work; and structural ladders, catwalks, and platforms.

The scanner accumulated raw data of all elements in the facility in the form of a dense 3-D spherical point cloud made up of millions of 3-D coordinates. In the end, these 3-D laser images formed a high-definition survey within the facility. After the completion of the scan, the scanning images are brought into BIM software by means of the Pointools plug-in to generate engineered geometry-based models.

Tools for 3D Data Capturing
Low cost survey:
Laser Disto
Surveying :
Robotic total station
3D Imaging, Laserscanning :
FARO Laser Scanner LS
Leica 3D Laser Scanners
upcoming technologies
– Dense image matching
Vision SLAM
– via smart mobile device or UAV helicopter
Range Cameras
– E.g. PrimeSense, Microsoft

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