14. Business Case
Enables future network growth
Patronage growth
Travel time savings
Benefits to the Auckland economy
Shape urban form to lead economic development
15.
16.
17. Auckland Rail Patronage Growth
0
5
10
15
20
25
30
35
40
M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J M M J S N J M M
2013 2014 2015 2016 2017 2018 2019 2020
AnnualRailPatronage(millions)
Observed annualised monthly growth
Extrapolated annualised monthly growth (past 2 years observed)
Extrapolated annualised monthly growth (past 1 year observed)
Required annualised monthly growth to reach 20m pax by 2020
20m pax per annum target
Date Auckland likely to
reach 20m annual rail
boardings
Currently on track to
reach 20m pax between
3 - 2.5 years earlier than
2020 target date
20. What is BIM?
Building Information Modelling
(BIM) is a process involving the
generation and management of
data and digital representations of
physical and functional
characteristics of places and
objects.
BIM is a process that uses the
intelligent model to facilitate
coordination, communication,
analysis and simulation, project
management and collaboration,
and even asset management,
maintenance and operations.
21. Implementation of BIM on the City Rail Link
Project
used for design coordination and optimisation
used as the primary drawing production environment
Objectives
significantly reduce clashes between different systems
foster confidence in the design intent
minimise re-work and variations during and construction phases
enhance project quality and workers’ safety on site
22. CRL BIM Process
GIS, Survey
Data
•Laser Scan (point clouds)
•Conventional survey data
•Property boundaries
Common
Reference /
Survey Points
•ME 2000 & STATION ALIGNMENT POINTS
Rail Alignment
(Bentley MX)
•Exported as 3D dwg files
Architectural
Spatial Setout
•Autodesk
Revit
Civil
Structure/MEP
•Autodesk
Revit
ROAD DESIGN (12d)
UTILITIES (Revit & 12d)
GEOLOGY (Leapfrog)
STEPS MODELLING
SMOKE MODELLING
(VISUALISATIONS)
(QUANTITIES)
NoR BOUNDARY
24. 3D Survey Data
Point cloud survey & 3D AutoCAD
file provide the information required
to model existing elements
accurately in Revit
3D contours are used to generate
existing and proposed road surface
in Revit
AutoCAD 3D survey file
25. Point Cloud
A set of data
points with X, Y &
Z coordinates.
Created by 3D
Scanners
Point cloud model
was used to
accurately model
existing
conditions
26. Creating Existing CPO & Britomart Models
From original CPO building drawings from the
early 1900
From CPO strengthening and alteration drawings done by
Opus as part of Britomart station development in 2001
From point cloud survey data
30. Geological 3-D Modelling
BIM for GEOLOGY
Geologists use Leapfrog to interpret:
Ground investigation data
Historic boreole data
CPT (cone penetration test)
3 dimensional model of their interpretation of the geology
32. Benefits of BIM for Rail
Delivery Benefits
Improved stakeholder communication
through 3-D visualisation
Improved coordination
clash detection and visual analysis
Greater accuracy of construction
documentation and handover
information
Asset Management Benefits
Improved data quality
Precise geometry for asset
management
Identification of built assets during
inspection and maintenance activities
Support facility assessments for
renovation, rehabilitation, and
replacement needs
33. Challenges
BIM standards and development have focused on the Built Environment
(e.g. Buildings and currently BIM enabled software does not handle linear
infrastructure modelling easily)
• This is resolved by following a documented process that allows
integration (but not automatically)
Infrastructure modelling software handles information in a
fundamentally different way to Buildings software which means
integration is achievable but clumsy and can be a time-consuming
process
Interoperability between software is key to effective information
management to obtain BIM
34. Conclusions
This will sustainably provide for economic growth that comes from
improved access for people into areas of high employment density
The interface with the operational railway at the only city centre
station is a major undertaking
The implementation of BIM on the project has already realised
many benefits including risk reduction of the procurement and
construction
BIM models will form the basis for asset management in the future
Public transport is the best way to meet the challenge of
significant population growth projected to continue for the next
30 years
35. Acknowledgements
Auckland Transport for permission to publish this
paper
Co-author Steve Hawkins of Auckland Transport
Principal Technical Advisor Partners:
• Mott Macdonald
• Jasmax Architects
• Grimshaw Architects
• ARUP
