3D Clash Detection

1,813 views

Published on

The Sydney Light Rail project is set to transform the city, but the design and delivery the complex solution has been made all the more difficult by the lack of understanding of the underground utilities affecting the route. This presentation will detail how Arup have devised a technical FME workflows that lets engineers from different disciplines collaborate more effectively though a GIS centric 3D clash detection process.

Published in: Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,813
On SlideShare
0
From Embeds
0
Number of Embeds
516
Actions
Shares
0
Downloads
29
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

3D Clash Detection

  1. 1. CONNECT. TRANSFORM. AUTOMATE. 3d Clash Detection Josh Symonds Senior Technician
  2. 2. Agenda !  Project !  Brief !  Input File formats !  Custom Formats !  12da !  4d !  Workspaces / Stages !  Outputs !  Conclusions / Lessons Learned
  3. 3. !  A global, integrated, multidisciplinary firm of professionals working together to tackle complex planning, infrastructure and building design challenges !  11,000 engineers, designers, planners, management consultants and economists !  90 offices in 37 countries !  Full service from concept through completion !  Dedicated to delivering value through expertise, global resources and local delivery
  4. 4. Brief !  Tasked with scoping design !  Joint design team: !  Arup !  Hassell !  Aurecon !  Utilities clash detection was manually by a handful of Arup Engineers !  Constant alignment tweaking Image Source: Arup
  5. 5. Brief !  Automation of the current process !  Apply assumptions !  Classification to AS5488 (Australian standard for subterranean utilities) !  Utility clash reporting to stakeholders Image Source: Sydney Morning HeraldImage Source: Arup
  6. 6. Brief !  Capture assets retrofitted within existing assets !  Utilise Dial Before You Dig (DBYD) !  Improve existing data Image Source: Arup Image Source: Arup Image Source: Arup
  7. 7. Input File formats !  Numerous input file formats !  CAD !  AutoCAD DWG !  Microstation (DGN) !  GIS !  Esri (SHP) !  Mapinfo (TAB) !  Survey / Design !  12d Solutions (12da) !  12d Solutions (4d) !  Microsoft (XLS)
  8. 8. Custom Formats – 12da !  Civil engineering and surveying format !  ASCII based file format !  15 “String Types” !  Structured hierarchy !  Model !  String !  Geometry !  Attributes
  9. 9. Custom Formats – 4d !  ASCII based file format !  Contains specifications for Drainage Structures !  Combined with Drainage network XLS creates full 3d model Image Source: Rocla.com.au
  10. 10. Workspaces – Initial Run !  All processing as a single workbench !  Solids generation of all survey assets & output in 1000 element files !  Clipping 147,000 utilities against 17,000 design elements !  Run manually on 3 workstations
  11. 11. Workspaces – Tweaked Run !  Broken down into 4 key stages !  Revised solids generation method !  Utilized the transformers: !  WorkspaceRunner, !  GeometryValidator, !  CollinearSliversRemover !  FME Feature Store (FFS) for interim storage !  Used Batch Deploy
  12. 12. Stages
  13. 13. Tweaked Run – Stage 1 !  AS5488 Classifications !  Added assumptions !  Pipe / Conduit Sizing !  Depths !  Survey, Local government GIS data and standardised !  Turn 2d elements into 3d
  14. 14. Tweaked Run – Stage 2 !  Survey assets clipped against design elements in “2.5d clip” !  Centre point of Manholes & Pits “clipped” against 2d design elements !  Reduction in Survey elements by ~60%, by filtering unrelated elements
  15. 15. Tweaked Run – Stage 2
  16. 16. Tweaked Run – Stage 2
  17. 17. Tweaked Run – Stage 2
  18. 18. Tweaked Run – Stage 3 & 4 !  Survey accurate solids with “buffer” !  Utilized the Transformers !  Chopper !  GeometryValidator !  3dBufferer (With tweaks) !  Clipper !  Output Both Clipper Passed, Failed elements for verification
  19. 19. Outputs – Solids Model
  20. 20. Outputs – Web interface
  21. 21. !  FME reduced manual workload significantly allowing for engineers to focus on other elements of design !  Asset owners requested enhanced data to improve their internal systems !  Custom formats utilised on various Arup projects Conclusions Image Source: Arup
  22. 22. Lessons Learned !  Clipping 72,000 utility solids against 700 design solids (takes a while and is probably not recommended) !  Reducing the amount of vertices greatly helped speed when generating solids !  You can still lose stuff in organised workbenches !  Clipping rectangular prisms instead of cylinders to reduce process time Image Source: http://www.practicalpmo.com/
  23. 23. Thank You! !  For Questions and more information: !  Josh Symonds E: Josh.symonds@arup.com !  Ben Cooper-Woolley E: Ben.Cooper-Woolley@arup.com CONNECT. TRANSFORM. AUTOMATE.

×