PRODUCTIVITY THROUGH DIGITAL COLLABORATION

Laser Scanning and Photogrammetry

> Owners

> Builders

> Architects

> Engineers

> Steel Detailers

> Services Subcontractors

> Fabricators

> Quantity Surveyors

> Academics

PRODUCTIVITY THROUGH DIGITAL COLLABORATIONLaser Scanning and Photogrammetry

> Existing site conditions

> New site progress capture and as-built record

> Structural deflection

> Heritage documentation

> Anything

> Anytime

> Anywhere

WHEN + WHERE?

> Verification

> Visualization

> Accuracy of interface

> Minimize rework and site errors

> Quantity take off and volume estimation

HOW?> 6 short examples of how laser scanning and photogrammetry are being

used in the industry now

ARCHITECTURAL PRACTICE

Michael Carlotto

WHERE WE USE POINT CLOUDS

> Refurbishments when interfacing with complex as-built conditions such as servicing and steel structures

POINT CLOUD AS-BUILT MODELEXISTING

> Confirmation of site conditions due to poor as-built records

> Capturing difficult to describe site conditions such as significant street trees that are to be retained and protected

> Reviewing site conditions for remote sites.

HOW WE USE POINT CLOUDS

> Concept design will typically be completed with a relatively inaccurate model to firm up scope of project and obtain client approval.

> With client approval, a surveyor will be engaged to perform a laser scan of the site as required. Additional survey information will also be obtained such as topography to obtain site conditions.

> A process of then aligning the existing building elements to the point cloud takes place. This then allows us to correctly phase the project for demolition and new construction.

HOW WE USE POINT CLOUDS

> The process that works for us is to align our concept model to the point cloud as required.

> Elements are also broken up at this stage to allow for demolition and construction phasing.

> This process works for us and our workflows but there are tools that can help automate the processing of point clouds into models for those looking for a more automated solution.

WHY WE USE POINT CLOUDS

> Not every existing condition is always modelled so using the point cloud for coordination with existing elements is valuable.

> Existing hardwood purlins clashing with new pipework to roof plant is can easily be fixed during documentation to ensure no delays occur on site.

> Clash detection with point clouds is problematic, so visual inspection is required.

> Helps ensure complex interfaces with existing elements is working between multiple disciplines.

Existing column

Existing parapetExisting column

STRUCTURAL ENGINEERING

Alan Cullen

WHO SHOULD USING POINT CLOUDS

COLLABORATION

Builders Owners

Architects

Engineers

Sub-Consultants

> Point clouds can be used at any stage of a project, from the beginning to firm up a design, during construction, or even at the end to help provide accurate As-Built documentation

EXISTING -PRECONSTRUCTION

DURING –CONSTRUCTION/ DESIGN PHASE

POST CONSTRUCTION –AS-BUILT MODEL/ DESIGN AND CONSTRUCTION VERIFICATION

HOW WE USE POINT CLOUDS IN WORKFLOW

> There is no set workflow for working with Point Clouds.> Different workflows work for different elements, designs

and stages of projects.> Find a workflow that works for you and look to innovate

and develop it over time.

From site to the Design office

Existing Site/Design conditions

WHY AND WHERE WE USE POINT CLOUDS IN PRE-COSTRUCTION

> During preconstruction 2d documentation and photos can be miss leading and lead to in efficient design and unclean scope.

> By early engagement of a laser scan varication of design and geometrical constraints. There for providing clear scope for the design intent.

Design intent to construction

HOW AND WHERE WE USE POINT CLOUDS DURING

COSTRUCTION

> During construction point clouds can used for construction management, verification of works, quantities and many more possibilities.

Verification of design intent

Construction management

> Scanning at different staged time along the construction phase can help ensure interfaces and design across different discipline are coordinated and provided less on site rectification works.

AS-BUILTS AND FACILITIES MANAGEMENT

HOW AND WHERE WE USE POINT CLOUDS IN POST CONSTRUCTION

> Post construction laser scanning can help to create accurate As-Built documentation and provide a basis of a FM and Asset Management models

From site to the Design office

• Accurate Design and Documentation• Better coordination• Less delays in design• Less RFI’s• Less wastage• Less reification work• Saving in time, using Virtual design and

construct• Savings in time and money!!!

WHAT ELSE CAN POINT CLOUDS BE USED FOR?

STEEL DETAILING

Philip Shanks

Surveying Workflow

• From site to Office- Preconstruction• From Office to Site – Preconstruction• From site to Office- During Construction• Savings?• Are we doing it?

From site to Office- PreconstructionAuto Desk Recap

From site to Office- PreconstructionAuto Desk Recap - Detail

From site to Office- PreconstructionSite after Stage 2A

From site to Office- PreconstructionTrue View

From site to Office- PreconstructionTrue View - Detail

From Office to Site PreconstructionFooting and HD Markers

From Office to Site Preconstruction

From Site to Office During ConstructionFooting and HD Markers – from site

Current project where Surveying is a mustUnderstanding the realities of mixing Concrete and Steel

Site pictures after pourHD bolts are ready to be surveyed

Critical detail to be maintainedFor movement of the building

Savings - $

• The cost of errors?• The cost of delay?• Who pays?• Who wants to keep making mistakes?• Who likes stress?• Who likes the idea of making a profit on a job?

Summary

• Surveying is still a hard sell to many• Who has the most to gain? Builders!• More builders are realising the benefits• Time will make surveying more widespread

SURVEYING – How can a Surveyor Help?

Mark Mayers

> Establishment of project coordinate system and physical benchmarks

> Construction setout corresponding with project coordinate system

> Conventional data capture Cadastral boundary and lease survey Topography and ground surface Detail feature surveys Underground Service Location Dimensional Control (precision survey for fabrication QC) Monitoring Surveys

> Other data capture Aerial LIDAR and Photogrammetry 3D Laser Scanning, terrestrial and mobile GPR and underground service detection

> Over all geospatial project coordination

What kind of services can your surveyor provide?

> Providing a clear and accurate scope often the first challenge Engage with surveyor and discuss objectives Your deliverable expectations, can your team work with point cloud

data? Yes anyone can use point data. What software? Do you want 3D CAD models too? Single as-built scan or progressive scans during construction? Surveyor can advise workflows and tools to extract value from data

> Costs impacted by: Site conditions, access, availability and complexity

> Specifications: Accuracy, Resolution, Full Colour, Areas of Interest, Coordinate System, file formats, etc.

> Sharing data with entire project team can multiply value of data and will maintain single source of information and spatial consistency.

> Free tools available for sharing scan information with all team membersPRODUCTIVITY THROUGH DIGITAL COLLABORATION

Laser Scanning and Photogrammetry

Think I want 3D laser scanning, how to ask for it?

> Surveyors asked to scan for as-built information & existing conditions

> Surveyors increasingly being asked to deliver CAD models now also “just give us a basic Revit model” Offshore modelling providers Quality conformance issues

> A need to aim for consistency in specifying scanning and as-built CAD modelling…. “retrospective BIM”?

> Working on guidelines for requesting scans and specifying deliverables

> Some documentation and standards exist• American Institute http://usibd.org• Need local guidelines• Work in progress

Working towards a standard

DOCUMENTING HERITAGE

Scott Beazley

Data Capture

Processing Model

Photogrammetry

Naga (Beng Malea) – Anthony Grech Faces (Bayon) – Morgan Garrett

Reference Points

Brett Cronin, Morgan Garrett, Anthony Grech, Thomas Sanderson

Process Trial at Chau Srei Vibol

CSV North Library – Thomas Sanderson

CSV North Library – Brett Cronin

Photo-model Reconstruction

Plans & Renders

Point Cloud for Revit Model was imported in to

Revit as a point cloud

Normalised image style was applied to better differentiate details in Revit Visibility settings

RECONSTRUCTION

Site plan

Roof Plan

Section

North - South

Elevations

North West

Handheld scanning interiors

DPI-8 Handheld scanner

Matthew Grove, Izaak Hollins, Charissa Naran, AshleighSullivan

Process Trial at Chau Srei VibolPhotogrammetry of exterior

Hand scan of interior at Chau Srei Vibol

Laser scanning at Lo Lei

Robin Drogemuller, Saray Kimhoel, Tang Makara , Scott Beazley

BEST PRACTICES> Share data will all parties> Develop consistency for specifying 3D laser scanning (apples & apples)> Establish a project coordinate system> Include details with project documentation> Insist same system used by all consultants and contractors> Require control documentation (benchmarks & coords) from surveyors

> Ask questions of the client and other consultants / subcontractors to ensure they get what they want

> Ask the client if they know what the subcontractors need> Consider the size of the scan (can it be used) – break up as required into

smaller files> Consider software compatibilities in terms of file formats and coordinate

system size – Ask questions of the recipient of the information to ensure you understand what they can make use of.

> Note – A more comprehensive best practice guide which will be available soon

THANK YOU

Alan Cullen

Mark Mayers

Michael Carlotto

Philip Shanks

Scott Beazley

PRODUCTIVITY THROUGH DIGITAL COLLABORATION · 2016-04-30 · PRODUCTIVITY THROUGH DIGITAL...

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Transcript of PRODUCTIVITY THROUGH DIGITAL COLLABORATION · 2016-04-30 · PRODUCTIVITY THROUGH DIGITAL...

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