where does bim4heritage fit? · 2020. 7. 23. · surveying and 3d laser scanning total station 3d...

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09/12/2016 BIM4HERITAGE SEMINAR

BIM4HERITAGE CAPABILITIES OF INFORMATION CAPTURE CARL BROOKES Topics: •  BIM – where do existing, especially

heritage, assets fit? •  Measurement and monitoring, 3D

laser scanning •  Photography and photogrammetry •  Benchmarking


BIM MATURITY LEVELS WHERE DOES BIM4HERITAGE FIT? Red line shows 2016 UK

target for government projects

Aiming to achieve Level 2

Reproduced from PAS 1192-2:2013 Specification for information management for the capital/delivery phase of construction projects using building information modelling


NEW BUILD BIM - THE INFORMATION DELIVERY CYCLE

Benefits of the new-build process are being recognised

Challenges influencing uptake may relate to CaPex investment expected yet Opex receives greatest benefits

Handover of Project Information Model (PIM) becomes the Asset Information Model (AIM)

Reproduced from PAS 1192-2:2013 Specification for information management for the capital/delivery phase of construction projects using building information modelling


EXISTING AND HERITAGE SITES

Benefits of BIM are less clear

There is no handover asset information model (AIM)

Existing information is likely to be a combination of forms, reports, sketches, 2D CAD etc..

Asset database be in use, for instance Tribal K2

Some sort of spatial framework/model will need to be produced

Significant conservation activities

Reproduced from PAS 1192-3:2014 Specification for information management for the operational phase of assets using building information modelling

Ongoing conservation activities


SURVEYING AND 3D LASER SCANNING

Total station

3D laser scanning

Measurement and monitoring


CAD READY FOR MODELLING SPECIALISTS Access and organisation of project data

Example shows point cloud data in model space

Sets up CAD ready data for BIM etc..

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LASER AIDED MODELLING (LAM®) – HISTORIC RECORDS ORTHOGONAL PROJECTIONS

Front elevation, orthogonal

3D point cloud

Scaled 2D drawings 09/12/2016

BIM4HERITAGE SEMINAR

LASER AIDED MODELLING (LAM®) – AS A FEED TO BIM 3D ARCHITECTURAL ARRANGEMENTS

Point cloud RGB 3D geometry model


LASER AIDED MODELLING (LAM®) – AS A FEED TO BIM 3D STRUCTURAL ARRANGEMENTS

Extracting steel sections


LASER AIDED MODELLING (LAM®) SIMPLE CLASH DETECTION

Checking proposals against the existing environment


LASER AIDED MODELLING (LAM®) – AS A FEED TO BIM DETAILED FORMS

Generated with VRMesh 09/12/2016 BIM4HERITAGE SEMINAR

LASER AIDED MODELLING (LAM®) – FOR ANALYSIS POINT CLOUD OF MARY ROSE HULL

3D laser scanning – point cloud Geometry model

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3D MODEL USED BY OTHER DISCIPLINES NUMERICAL SIMULATION OF ATMOSPHERE USING CFD


POINT CLOUD TO REVIT MODELS

Conventional process Existing environment scanned, modelled, and new equipment designed and accurately fitted. Reduces risk of expensive snags during construction


POINT CLOUD APPLICATIONS WITHIN HYBRID CAD

Planning tunnel strengthening Better process Use of hybrid environment to avoid modelling


POINT CLOUD APPLICATIONS WITHIN HYBRID CAD

Planning passenger escape routes from broken down trains Better process Colouring cloud based on escape clearance criteria


MORE ON LAM® SNOW HILL TUNNEL – EMERGENCY ESCAPE


BIM – EXISTING AND PROPOSED

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MONITORING COMPARING PINT CLOUDS – MAJOR CHANGES


MINOR CHANGES - CONDITION

2011 2016 Comparison


POINT CLOUDS AND THERMOGRAPHY


HANDHELD SCANNING - SLAM

Trial in SPAR 2012 conference

GeomSLAM ZEB1

Scanning took 30 mins

Zone modelled took around 2 hours

Point cloud

3D PDF model


PHOTOGRAPHY AND DIGITAL PHOTOGRAMMETRY

GoPro6 – Static and mobile spheroidal photography

UAV HD photography and digital photogrammetry

Handheld laser scanners


SPHEROIDAL PHOTOGRAPHY AND GIS INTERPHASE

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DIGITAL PHOTOGRAMMETRY V 3D SCANNING

Cost benefits

Better access, for example UAVs and UGVs

Generally not as accurate

Some survey control required to scale

Meshed point clouds can show aberrations

Poor performance through vegetation


LANDSCAPE MODELLING UAV AND DIGITAL PHOTOGRAMMETRY


PRECISE MEASUREMENTS FROM DRONES

Benchmarking point clouds from different measurement technologies


ZEB REVO TRIAL RUN ON RAMBOLL SOUTHAMPTON SITE 03/02/2016


MEASUREMENT TRAJECTORY


COMPARISON WITH EXISTING 3D GEOMETRY MODEL 3D LASER SCANNING POINT CLOUD V HANDHELD

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COMPARISON WITH EXISTING 3D GEOMETRY MODEL 3D LASER SCANNING POINT CLOUD V HANDHELD


POSITIONING AND SCANNING

GPS is clearly important for estate management

IPS (indoor positioning systems) are emerging – allowing notes, photos etc., to be automatically linked back to BIM from, for example, a field tablet

•  Inertial measurement units (IMU) – based on known origin, timing and accelerometers

•  Simultaneous localisation and mapping (SLAM)

•  WiFi SLAM with beacons – Redpoint systems claim 0.2m accuracy

where does bim4heritage fit? · 2020. 7. 23. · surveying and 3d laser scanning total station 3d...

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