Planning and Design of the Auckland City Rail

LinkTom Ireland

Outline

Auckland Passenger Rail Context

Background

Project description

Business case

Use of BIM

Conclusion

Auckland Population Around 1.5 M todayProjected to reach 2 M around 203360% of New Zealand’s population growth

Current Rail Patronage Growth

Britomart Station opens in City Centre

Electrification of Rail

Network

City Rail Link Project

City Rail Link (CRL) Vertical Alignment

Britomart Transport Centre

Britomart Transport Centre – Today

Britomart Station Redevelopment

Aotea Station

Karangahape Station

Business Case

Enables future network growth

Patronage growth

Travel time savings Benefits to the Auckland economy

Shape urban form to lead economic development

Auckland Rail Patronage Growth

MAMJ J ASONDJ FMAMJ J ASONDJ FMAMJ J ASONDJ FMAMJ J ASONDJ FMAMJ J ASONDJ FMAMJ J ASONDJ FMAMJ J ASONDJ FMAMJ2013 2014 2015 2016 2017 2018 2019 2020

0

5

10

15

20

25

30

35

40 Observed annualised monthly growthExtrapolated annualised monthly growth (past 2 years observed)Extrapolated annualised monthly growth (past 1 year observed)

Annu

al R

ail P

atro

nage

(m

illio

ns)

Date Auckland likely to reach 20m annual rail board-ings

Currently on track to reach 20m pax be-tween 3 - 2.5 years earlier than 2020 tar-get date

Economic Development in the CRL Corridor

Urban Regeneration

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.

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

CRL BIM ProcessGIS, 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/ME

P•Autodesk Revit

ROAD DESIGN (12d)UTILITIES (Revit &

12d)GEOLOGY (Leapfrog)

STEPS MODELLING

SMOKE MODELLING(VISUALISATIONS)

(QUANTITIES)

NoR BOUNDARY

Known/Surveyed points

Rail Alignment 3D Model Designed in Bentley MX Exported as 3D dwg file for use in

Revit

In all Revit models

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

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

Creating Existing CPO & Britomart ModelsFrom 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

Britomart Detailed Design

Aotea Station

STEPS Passenger Modelling

Geological 3-D ModellingBIM 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

LEAPFROG to REVIT

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

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

Conclusions

This will sustainably provide for economic growth that comes from improved access for people into areas of high employment densityThe 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

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