Industry Briefing Agenda Welcome address Minister Dean Nalder, - - PowerPoint PPT Presentation

Industry Briefing

Agenda

Welcome address Minister Dean Nalder, MLA Project Overview Project Director - Ray Seman Geotechnical and Tunnelling Geotechnical Manager - Eric Hudson-Smith Procurement and Commercial Delivery Manager - Dave Thomas Q&A Session

Industry briefing: purpose

• The briefing heralds the start of the procurement

process for the $2 billion Forrestfield-Airport Link.

• Provides insight to the projects planning,

purpose and contract details.

• Leads into industry engagement to fulfil the aim
• f appointing main contractor in 2016.
• Interactive Q&A session with presenters.
• All material will be available online post-event.

• Hon. Dean Nalder,

MLA. Minister for Transport, Finance.

Project Overview

Location and Scope

• 8km twin bored tunnels through soft

ground conditions

• Tunnelling beneath Swan River and
• perating Perth Airport
• Cross passages and egress shafts
• Rail infrastructure and operating

systems

Three new stations

• Airport West Station
• Consolidated Airport Station
• Forrestfield Station

Three new stations; two underground

Timing

• Industry Briefing

Perth, November 14, 2014

• Expressions of Interest called

Early 2015

• Requests for Proposal released

Mid 2015

• Contract award

Mid 2016

• Trains running

2020

Procurement, contract award, construction, completion

Delivery Model

Single contract for Design and Construct

• Responsibility for commissioning
• Elements of maintenance
• Excludes rollingstock (trains and buses)

Concept of operations

• Standard rail treatments with overhead AC traction power
• Current rollingstock
• Known technologies and control systems

Business as usual Integration

• Rail extension required to integrate with broader suburban

system

• Consider next generation of signalling and communications

technology

Tunnels and rail

• Internal diameter – 6.2m
• Nine cross passages, three with egress shafts to ground level
• Waterproofing
• Rigid Conductor Rail for overhead traction power

Twin bored tunnels, new track to Forrestfield

Rollingstock

• Included in project budget - not supplied by contractor
• Forrestfield Line serviced by existing rollingstock

Stations

• Platform lengths to accommodate 6 car trains
• Anticipate island platforms at each station
• Integration concepts subject to consultation

Station features

• Airport West Station - shallow underground

station, bus interchange and parking for 500-1,000 cars.

• Consolidated Airport Station - deeper station,
• n Commonwealth land, constructed with Perth

Airport works.

• Forrestfield Station - at grade station with

stowage, bus interchange and parking for up to 2,500 cars.

Airport indicative design 2020 Concept design only Concept design only

Perth Airport

• Executive, technical and approvals

working groups

• Developing Heads of Agreement

Current matters

• Land access during construction and
• perations
• Approvals processes including the

Commonwealth authorities

• Interaction with planned airport works

Future considerations

• Use of tunnel and station spoil material
• Interface with airport security and

emergency services

Relationship

Forrestfield

• Service relocations
• Supply of construction power
• Road reconfigurations

Early works

Bayswater

• Optic fibre to East Perth

• Main site at Forrestfield
• Additional areas at Bayswater, Brearley Ave and on Airport land.
• Less constrained outside Airport

Site availability

Work underway

• Utility survey throughout
• Preparation of a 3D model

Utilities

Current team

• PTA project staff: 40 in total
• Technical Advisors: Various consultancies - local and

international multidisciplinary

• Legal Advisor: State Solicitor’s Office and Allens Linklaters
• Probity Auditor: Braxford Consultancy
• Reference Design
• Scope of Works and

Technical Criteria

• Regulatory approvals

Current activities

• Land acquisition
• Project Deed
• Airport processes

Buy local application

• Will apply to main contract
• More information see: State Supply Commission website

Encourages engagement with local industry

Further resources

During contract

• Design review
• Commercial support
• Other specialist advisors

Contract award

• Technical review
• Commercial risk

Geotechnical and Tunnelling

Likely phases of geotechnical investigations

A staged program is underway

Phase 2 Geotechnical Scope

• Over 400 boreholes, cone penetrometer tests and test pits at around 50m spacing,

including barge drilling in Swan River

• Spoil reuse study
• Geophysics trial
• Pump testing, long term groundwater level monitoring in aquifers
• Laboratory testing including abrasion and frozen soil testing
• Collection of foundation information on existing facilities

Phase 2 Geotechnical Scope, continued

• Geological and hydrogeological models of route
• Preliminary assessment of construction impacts on nearby facilities (e.g. deep

foundation element construction, aquifer drawdown and excavation)

• Ground gas monitoring
• Review of man-made obstructions to tunnelling

Dulles International Airport, 2005-2008: TBM settlement trough

Preliminary geotechnical findings

• Geological model – Common Perth units and Ascot Formation

(calcareous sand to calcarenite cobbles)

• Dewatering and recharge (Leaky aquifer system)
• Minor ground movement and low levels of associated impact are

likely, provided good practice and no major incidents occur during critical works stages

• 1M m3 spoil - potentially suitable for re-use
• Comprehensive baseline and construction monitoring

Modelling, monitoring and groundwater

Ground Conditions- near Consolidated Airport Station

Current as at 11 November, 2014

Ground Conditions- across Swan River valley

Current as at 11 November, 2014

Aquifer behaviour

Leaky aquifer system

Environmental investigation phases

Ongoing studies:

• Detailed Site Investigation - Acid Sulphate Soils and soil and

groundwater quality

• Baseline environmental monitoring
• Private bore survey
• Heritage survey

Preliminary site investigation complete

• No significant contamination expected in bulk excavations
• All geological unit are Potentially Acid Sulphate Soils (PASS) to varying

degrees

• Potential nearby off-site sources of groundwater contamination are being

investigated

• Nearby sensitive environmental receptors identified

Preliminary environmental findings

Likely construction methods

• Bored Tunnelling – Slurry vs EPB

TBM.

• Diaphragm Walls - Stations and

dives

• Stations - top down, bottom up

Tunnel boring machine

Likely construction methods

• Dewatering, recharge and

monitoring borefields

Likely construction methods

• Ground improvement – Jet

grouting, deep/cutter soil mixing

Likely construction methods- cross passages

Likely construction methods- ground freezing

Risk management strategies

Ground Conditions

• Thorough, staged investigations and

reporting by PTA

• Involvement of prospective and actual

tenderers in scoping

• Full disclosure of data
• Ground Condition Risk Register
• Geotechnical Interpretive Report

Planning, reporting and scoping

Dulles International Airport, 2005-2008

Risk management strategies

Ground movement impacts

• Preliminary studies by PTA - drawdown

and ground movement impacts

• Baseline monitoring of critical

infrastructure by PTA (inSAR, laser scan, tower)

• Instrumentation and Monitoring Plan
• Ground Movement Impact Plan

Investigate and monitor

Perth Airport control tower

Procurement and Commercial

Main Works contract

• lump sum, ‘design & construct’ (D&C) contract
• purpose-built deed

Form of contract

• tunnels, station boxes, all civils works
• tunnel and station fit out and services
• track
• rail systems (e.g. signalling, communications, power)
• some maintenance

Includes all major works

2016 Site works commence 2019 Tunnelling complete 2020 Rail line

• pens

2017 Tunnelling commences

Note

• advertised through Tenders WA website
• State does not intend to contribute to bid costs

Early Works contracts

To be delivered in advance of the Main Works contract

• relocation of some significant utilities
• construction power connection at Forrestfield

Additionally

• communications link from Bayswater Junction to CBD

Timetable – Main Works

Procurement timetable

Typical D&C contract

Risk allocation

Procurement

Maintenance scope

• Tunnel infrastructure
• Tunnel services
• Station infrastructure
• Station services

PTA has engaged Braxford Consultancy as Probity Auditor:

Gary Gliddon, Managing Director (08) 6389 2090 / gary@braxford.com

Probity

Airport indicative design 2020 Concept design only Concept design only

Next steps

Market sounding – to test the project

• to be undertaken shortly

Data room – early release of data

• restricted to potential main bidders

EOI release – getting ready

• January 2015

Q&A Session

• Reece Waldock
• Ray Seman
• Eric Hudson-Smith
• Dave Thomas

Contact

w: forrestfieldaiportlink.wa.gov.au e: connect@forrestfieldairportlink.wa.gov.au p: 13 62 13