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Modelling 3D Structures
Rachael Albrighton Richard Allitt Associates Ltd
Modelling 3D Structures 11th November 2016
Introduction
• Modelling 3D structures in 2D such as ponds and embankments is a relatively new advancement within the industry.
• They can be represented using features within InfoWorks ICM or by adding the structures directly into the DTM.
• During detailed design, there is a need to assess the modelling approach used due to the various design stipulations that commonly need to be met.
• This presentation will examine how this issue was overcome during a flood alleviation scheme in Filey
Modelling 3D Structures 11th November 2016
Background
• 18th July 2007, 82mm of rain fell in 90 minutes
• Significant overland flow from the surrounding arable fields
Modelling 3D Structures 11th November 2016
18th July 2007
• Flooded 200 properties, a school & severe erosion to the ravines
Modelling 3D Structures 11th November 2016
Following Flooding
Modelling 3D Structures 11th November 2016
Model Development Timeline
Using tools within
modelling software
Modelling 3D Structures 11th November 2016
Using tools within Modelling Software
Modelling 3D Structures 11th November 2016
Process Issues
• Publically funded industry
• Many stakeholders are non-technical - scheme visualisation is important
• Current modelling practices bespoke and only easily understood by people with modelling experience
Modelling 3D Structures 11th November 2016
Using tools within modelling software
Building 3D Structures into the DTM using Global Mapper
Model Development Timeline
Modelling 3D Structures 11th November 2016
Building 3D Structures into the DTM using Global Mapper
1
Modelling 3D Structures 11th November 2016
Extent and Crest of Embankment
2
Modelling 3D Structures 11th November 2016
Extruded Embankment
3
Modelling 3D Structures 11th November 2016
Extent of Base of Storage Area
4
Modelling 3D Structures 11th November 2016
Final Storage Area
5
Modelling 3D Structures 11th November 2016
Model Development Timeline
Using tools within modelling
software
Building 3D Structures
into the DTM using Global
Mapper
Building 3D Structures into the DTM using 3D AutoCAD
drawing
Modelling 3D Structures 11th November 2016
Using 3D AutoCAD Drawing
1
Modelling 3D Structures 11th November 2016
Contours Combined with DTM XYZ Points
2
Modelling 3D Structures 11th November 2016
Storage Area Clipped
3
Modelling 3D Structures 11th November 2016
Merged into Existing DTM
4
Modelling 3D Structures 11th November 2016
Conclusion
• Whilst current practices are appropriate at the initial design stage, it is not accurate enough in the detailed design stage
• Having a scheme that is incorporated within the DTM is easier to visualise for stakeholders and public and can be used for other purposes
• Current drive of using BIM, working in partnership and visual nature of modelling, seems logical that the next step is to directly add schemes into the DTM.
Thank you