Construction Verification Using Laser Scanning technology and software Chris Palmer Sales Engineer 28 th April 2017 1
Contents What is construction verification? How do we measure and check construction on site today? How can Laser Scanning add value to the Construction process? Case Study 1: Bradford College Case Study 2: Bradford ATC Case Study 3: No.1 Spinningfields, Manchester Case Study 4: Birmingham City University (In Progress) 2
What is Construction Verification? Why do we need on-site checks What types of applications require monitoring How do currently monitor construction How can Laser Scanning add value 3
Why do we need onsite checks Avoid Inaccuracies in the realisation of a design by a main contractor and monitor site progress Provides a feedback loop for the whole project team of any changes that may be, or may have been, necessary onsite which effect construction progress. Reduce Risk! : Benefit to contractor in getting quick identification of potentially costly mistakes which can cause repetition of work. Monitor and quantify subcontractors work. Benefit to design team in avoiding unforeseen design variations during construction which have a knock on effect to time and cost. Benefit to Client in having better cost certainty and accurate record of built asset. Client Design Team Main Contractor Can help all parties avoid costly litigation caused by disagreements over time, cost, quantity, quality etc. 4
What requires monitoring and why? Empty Site / Demolition Excavations, Utilities Foundations, Civils, Site Frame Concrete, Steel, Timber Concrete Floors How big? How much? How Deep? Where? Quantity? Record? Exact Position? Deflection? Thickness? Flatness? Exterior Envelope, Cladding, Curtain Walling MEP Internal Fit Out As Built Condition Position? Verticality? Clashes? Record? Position? Room Areas? Complete Record! 5
How do we currently monitor construction? Tape Measure Total Station Photographs BIM 360 Field Drone Footage 6
The Theory of everything! 7
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T h e T h e o r y 9
Bradford College Scanned after Demolition and following Landscaping 10
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Bradford College BAM Construction project, designed by Bond Bryan Architects with FARO involved in R&D sub-project to carry out scans during the demolition of the old College building and landscaping of the site. The aims of project were: Find a way to quickly calculate rough volumes for site materials. Calculate cut and fill of site retrospectively upon completion of landscaping. 12
Laser Scanning End-to End Workflow Capture Process Create Civil Works Registration Volume App Clean Up Isolate & Extract Modelling Quantification 13
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Volume Extraction in Autodesk Civil 3D 16
Bradford ATC Three Storey Steel and Concrete Frame Scanned During Construction and after completion 17
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Bradford ATC 4D point Cloud consists of 30 Scans during Construction. 166 After Completion. Modern methods of automated target less registration depend on scan overlap and similarity of features. Scanning overtime throws this on it s head as everything is different and constantly changing. Registration of scans taken over time is therefore larger dependant on known coordinates and planes / points which can be created on surrounding geometry. 19
Optimising the Recap File Register Scans, apply control, define coordinate system Batch import for file size manageability / clean up, create regions and export Structural Frame (Areas A D).rcs Import each.rcs individually in Navisworks or back into recap to group as an RCP file Externals.rcs.RCP Export Ground Floor.rcs First Floor.rcs Second Floor.rcs Central Stairwell.rcs Search sets don t work on Point Clouds so manual segmentation is critical for data management and clash result validity 20
D u r i n g C o n s t r u c t i o n S c a n s 21
Data Segmented in Autodesk Recap 22
Extracted & Unified Structural Frame 23
4 D L a s e r Scans in Re c a p 24
C l a s h D e t e c t i o n D e s i g n M E P v s A s B u i l t S t e e l 25
W e b s h a r e h y p e r l i n k s w i t h i n A s B u i l t B I M 26
4D Webshare Cloud Project Project created retrospectively, however could be created throughout project if coordinate system defined at the outset. During construction scans as.cpe file = 1.5gb As Built Scans as.cpe file = 14gb 27
No.1 Spinningfields Concrete Floor Flatness and Beam Deflection Mixed Reality views SKUR model accuracy analaysis 28
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Scan and Model Alignment Scan registered to site coordinates rather than design coordinates 30
Concrete Floor Flatness Created using the Rithm Apps available on the FARO App store 31
Beam Deflection Analysis Created using the Rithm Apps available on the FARO App store 32
Navisworks model into Scan View Created using.nwd file and Recap 360 Pro 33
SKUR Analysis Cloud Based Service Uses.pts and.e57 scan formats and.dwg Produces layered heat map Point Cloud Colourises.dwg based on deviation Produces difference report with breakdown of results 34
SKUR Analysis 35
SKUR Analysis 36
Birmingham City University In Progress.. VR Site Progress checks? AR mixed Reality checks? 37
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Any Questions? 39