Community getting involved in shaping rail projects

Community members are having their say in the identity of rail projects around Australasia.

In New Zealand, City Rail Link has announced that its tunnel boring machine (TBM) will be named after Dame Whina Cooper, who campaigned for social justice and land rights for Māori in New Zealand. Chief executive of City Rail Link Ltd Sean Sweeney welcomed the choice.

“We were looking for the name of a New Zealand woman who inspired – brave, compassionate and fearless – and all those outstanding leadership qualities are well and truly represented by the very remarkable Dame Whina Cooper.”

Dame Whina Cooper was one of three women who were shortlisted to inspire the name of the TBM and the final decision was made by a poll that attracted 3,500 votes. The two other women who were nominated were Margaret Bradshaw, an Antarctic scientist, and the world’s first elected openly transgender Mayor and Member of Parliament, Georgina Beyer.

“I am grateful to all New Zealanders for their support and their nominations and votes, particularly at a time when we were all grappling with a pandemic. I would also like to thank Dr Bradshaw and Ms Beyer for allowing their names to be considered for our TBM,” said Sweeney.

The TBM will arrive on site in October, and will be reassembled at the Link Alliance project site at Mt Eden. The TBM will excavate two 1.6km tunnels from Mt Eden to Aotea Station.

In Western Australia, over 2,400 community members were involved in the future of Cockburn Central Station Tower.

After the removal of the controversial Cockburn Faces artwork in October 2019, the Cockburn community was asked to select a new use of the tower. Options included a new artwork, clock, digital screen, or the return of the faces.

After a month-long survey, 43 per cent opted for a new piece of artwork, and 37 per cent preferred an analogue clock.

“The community has spoken and, with almost half of the votes going for new artwork, our attention will now turn towards selecting an appropriate piece for the tower,” said WA Transport Minister Rita Saffioti.

The WA Public Transport Authority will release a tender for the new artwork for a local WA artist in the coming months. Jandakot MLA Yaz Mubarakai said the site is significant for the local community.

“Thousands of motorists and train commuters see the Cockburn Tower every day so it’s important they’ve been able to have their say and the most popular option has been selected.”

Work resumes on all CRL sites

Construction on the City Rail Link (CRL) in Auckland has resumed.

On-site activity was temporarily halted for five weeks during the coronavirus (COVID-19) lockdown in New Zealand, however all six CRL sites are now operating. These sites are located in the middle of the Auckland CBD at Britomart, Albert Street, Karangahape, and Mt Eden, as well as at Ōtāhuhu.

Although construction may have been halted, off-site work could continue, enabling what CRL Ltd chief executive Sean Sweeney called a “strong and safe” return to construction.

“The prep work completed at our sites during the past week together with planning and design work done from home by our backroom teams during the lockdown will all contribute to a successful return to work.”

Other rail projects across New Zealand have also resumed, with KiwiRail workers returning to sites including the Kaikōura rebuild and the Wellington metro upgrades. Transport Minister Phil Twyford acknowledged the efforts of the rail and construction sectors.

“I’d like to thank the industry, Waka Kotahi, City Rail Link Ltd and KiwiRail for their efforts which will see well over 1,000 construction workers back on the job this week. For example, the Kaikōura rebuild will see around 450 road and rail workers back to work, City Rail Link expects 400 workers back this week, and Transmission Gully and Pūhoi to Warkworth will ramp back up to hundreds of workers at each.”

Deputy Prime Minister Winston Peters said works would soften the economic impact of COVID-19.

“We’re putting our money where our mouth is and getting people back to work day one of Alert Level 3 so we can get money into the pockets of businesses and workers sooner.”

At CRL sites 200 workers are on site on the first day, Tuesday, April 28, and numbers will go up to 400 by the end of the week.

“Our priority is the safety of our construction teams and the wider community.  At morning start-up and toolbox meetings workers will be briefed about stringent new health and safety protocols before they make a successful start to their shifts. Those rules cover things like access to sites, safety and protection for themselves and their workmates, and sanitation and cleaning regimes. We’ll be applying the protocols diligently,” said Sweeney.

Rail has been targeted as a way for the New Zealand economy to recover after the lockdown, with multiple projects put forward by local governments and the NZ Greens pushing for further work on the country’s regional rail system. According to Sweeney, CRL has a role to play in this.

“Given the project’s size and the contribution it can make, getting back to work quickly will be a significant and important contribution to the revival of the New Zealand economy.”

Similar to other projects in Australia, CRL is looking to take advantage of lower traffic levels to get ahead of schedule.

“It is our priority to keep the community, and relevant organisation and stakeholders informed if there are any changes,” said Sweeney.

NZ City Rail Link ready to re-start construction

The New Zealand government has approved Auckland’s $4.45 billion City Rail Link (CRL) to resume construction after the COVID-19 lockdown.

Sean Sweeney, CEO of New Zealand’s biggest infrastructure project said his team is champing at the bit for a rapid re-start.

“We’re already inspecting all CRL sites and making them ready for a safe return to work next week,” he said.

Work will resume on Tuesday, April 28 at all CRL sites including the C1 contract at Britomart and LowerQueen Street, C2 in Albert Street, C3 at Aotea in central Auckland, Karangahape Road and at MtEden, and C8 on the southern rail line at Ōtāhuhu.

“Because of our size we’re aware of the big role we have in quickly getting the economy moving again, supporting the contracting and infrastructure industries and seeing our workers safely back on the job,” Sweeney said.

He said the paramount priority will be keeping workers and the wider community safe.

“We had some pretty strict safety measures in place before the lockdown, but next Tuesday’s return to work will be different,” he said.

Sweeny said there will be additional constraints including restricted access to sites, physical distancing, protective clothing and sanitising and cleaning regimes.

“They will all contribute to a successful re-start in the new COVID-19 work environment, and, just as importantly, they will help ensure our workers get home to family and friends virus-free when they finish their shifts,” he said.

Sweeney said it is too early to measure if COVID-19 has impacted on project costs or construction timetables.

“It may be months before we know that once the economy has settled down a bit and we have a clearer picture on the availability of workers, and what sort of shape some of our suppliers both here and overseas are in,” he said.

“I know we have a small team of workers waiting in France because there are no flights here at the moment – that’s not a lockdown issue that‘s a wider international COVID-19 issue.

“A big plus for the project was ability of City Rail Link Ltd (CRL Ltd) and our Link Alliance contractors to be able to keep working on construction and design programmes during the lockdown – time wasn’t wasted and that’s been a big boost for our re-start.”

The project team is investigating opportunities to accelerate some work, including more shifts of work and the use of extra plant and machinery.

“Those ‘shovel ready’ ideas are still in the planning stages but our contractors will be working hard – and safely – to get CRL delivered as quickly as possible for Auckland,” Sweeney said.

Phil Goff, Auckland Mayor, has welcomed the government’s announcement to resume construction and CRL’s re-start news.

“As one of Auckland – and New Zealand’s – biggest and most important infrastructure projects, the City Rail Link will play an important role in the post-COVID-19 economic stimulus,”Goff said.

“It’s critical that CRL construction resumes quickly to help kick start the economy, get construction and infrastructure industry employees back into work and limit as much as is possible the lockdown’s impact on construction timeframes.”

In the meantime, City Rail Link is in the search for an inspiring woman’s name for the project’s Tunnel Boring Machine (TBM).

The TBM is due to arrive from China later this year in sections and reassembled at the Link Alliance construction site in Mt Eden.

The Link Alliance will start tunnelling with the newly named TBM early next year, excavating 1.6 kilometres from Mt Eden to the Aotea Station in central Auckland to connect with the tunnels already constructed from the Britomart Station.

“Tunnelling tradition dictates a TBM cannot start work until it has been given a female name, a sign of good luck and safety for the project ahead. Our search seeks to recognise the many amazing women New Zealand has produced,” Sweeney said.

Shortlisted names include Antarctic scientist Dr Margaret Hayward, transgender politician Georgina Beyer, and Maori welfare and lands champion Dame Whina Cooper.

NZ rail projects part of post-Covid-19 wishlist

New Zealand is looking for major infrastructure projects to get the country going once its lockdown phase ends.

After the NZ government announced on April 1 that it would be looking to fund infrastructure, including rail, worth over $10 million councils have now submitted proposals.

Although the projects come from a range of infrastructure sectors, both Auckland and Wellington have nominated rail projects as some of their priorities.

The City Rail Link in Auckland is one of the 73 projects the local authority has submitted to the national government. Although already mid-build, the City Rail Link has been put on hold due to the shutdown but is part of the city and the nation’s long-term vision, said Auckland councillor Chris Darby.

“Not only are these projects ‘shovel-ready’, they are also ‘future-ready’. This once in a generation investment will create jobs for Aucklanders who will build a transforming legacy for our city.”

Mayor Phil Goff said that the local authority would be looking to work with the construction industry to progress the projects.

“Prior to COVID-19, Auckland Council was on track to deliver a capital works programme exceeding $2 billion for the financial year,” said Goff.

Other rail projects to be nominated to the Infrastructure Industry Reference Group (IIRG) include the Puhinui rail and bus interchange.

Councillors from the Wellington region have also nominated upgrades to rail stations and improved long-distance rolling stock as essential for the region.

Andy Foster, Mayor of Wellington City Council, said that the package was submitted collaboratively with councils across the region.

“Wellington region already had very significant infrastructure needs before COVID-19 – coping with growth, resilience and connectivity. COVID 19’s impact on our economy and on Councils themselves makes Government’s willingness to assist even more critical than it already was.”

Announcing the IIRG, which includes KiwiRail chief executive Greg Miller and NZ Transport Administration chairman Brian Roche, Infrastructure Minister Shane Jones said that projects will be looked at based on their impact.

“These projects will help address the country’s infrastructure deficit as well as create jobs and buoy the economy.”

Transport Minister Phil Twyford outlined what types of projects could receive funding.

“The types of projects the Government would consider funding include water, transport, clean energy and buildings. They would also have a public or regional benefit, create jobs and be able to get underway in short order.”

CRL links Auckland to its volcanic past

Construction of the City Rail Link (CRL) in Auckland has uncovered a link to the region’s pre-historic past.

A tree fragment uncovered during tunnel boring has been dated to 28,000 years ago.

The fragment was found when CRL’s small tunnel boring machine, Jeffie, was excavating for a stormwater drain under Mt Eden. The machine was tunnelling through an ancient lava field 15 metres below ground.

After being extracted from the site, the tree fragments were sent to volcanologists for radiocarbon dating. This confirmed that Maungawhau/Mt Eden erupted roughly 28,000 years ago, said Elaine Smid volcanologist at DEVORA.

“We have used other techniques to date this eruption, with similar findings. This new radiocarbon result removes any lingering doubts about the age of Maungawhau/Mt Eden.”

The finding allows for scientists to confirm that Mt Eden erupted during the Ice Age, and connects the current rail tunnelling program to similarly significant geological events in Auckland’s past, said Gabriel Kirkwood Kaitiaki for Ngāi Tai ki Tāmaki – Taiaomaurikura.

“Both events in their own way are creating dramatic changes to the landscape of Tāmaki Makaurau and the way we interact with it for generations to come,” said Kirkwood.

The tunnelling is part of excavations to connect CRL tunnels with Auckland’s existing rail network at Mt Eden. While the CRL will enable Aucklanders to travel around their city without the need to get into cars, the excavation has helped in other ways to keep Auckland safe, said Smid.

“DEVORA scientists use volcano ages to identify eruption patterns and to better understand how the Auckland Volcanic Field has behaved in the past – it’d like a big puzzle,” she said.

“This age is another piece in that puzzle, now slotted firmly into place. Every piece we add tells us a little more about how the volcanic field may behave in the future, making Auckland a safer place.”

The four projects shaping Australia and New Zealand

Four “nation shaping” projects are contributing to Australia and New Zealand’s substantial infrastructure pipeline. Their project directors gave overall updates on these major transport projects at AusRAIL PLUS 2019.

CROSS RIVER RAIL

While Queensland has enjoyed significant population growth in recent years, nearly 90 per cent of that growth has occurred within South East Queensland (SEQ). This region is expected to further increase its population by around 1.5 million over the next twenty years.

Cross River Rail will address a major bottleneck within this region. As such, it is Queensland’s highest priority infrastructure investment and the government has allocated $5.4 billion towards the project.

Currently, there is only one inner-city crossing over the Brisbane river and just four inner-city stations. Cross River Rail will unlock the bottleneck by providing a second river crossing, therefore doubling the capacity of the network and allowing more trains to run more often, as well as integrating with roads and bus services to enable a turn-up- and-go public transport system across the whole of SEQ.

The project incorporates a 10km rail line from Dutton Park to Bowen Hills, which includes 5.9 kilometres of twin tunnels under the Brisbane River and the CBD, with four new underground stations. A new European Train Control System (ETCS) signalling system is also being delivered to improve safety and assist in managing capacity constraints in the network. Numerous station upgrades between the Gold Coast and Brisbane and three new stations at the Gold Coast end the network are also planned.

Cross River Rail Authority’s program director David Lynch says early works have now been officially completed, though these are relatively small in the overall scheme and context of the project.

“Our procurement processes are essentially complete as of the end of October, and construction is now underway across all three packages, with four to five years of construction and commissioning ahead,” Lynch said.

“All major work sites have now been handed over to the contractors.”

The mammoth project will be delivered under three major infrastructure
packages of work: the Tunnel, Stations and Development (TSD) public-private partnership (PPP); the Rail, Integration and Systems (RIS) alliance; and the European Train Control System (ETCS).

The TSD PPP will deliver the underground section of the project, including the tunnel from Dutton Park to Normanby and the construction of four new underground stations. It includes the associated mechanical, electrical and safety systems, such as vertical transportation for passengers at underground stations, above and underground track work, tunnel portals and dive structures, traction power systems and rail operation and control infrastructure. The package also includes a property development opportunity above Albert Street station.

It will be delivered by the PULSE consortium.

The RIS “UNITY Alliance” will deliver the design, supply and installation of the supporting rail system, including rail civil and electrical works, rail operation systems and controls, as well as rail signalling and communications work. The alliance will also deliver accessibility upgrades to six suburban stations. The alliance will be responsible for the integration of Cross River Rail into Queensland Rail’s train network.

The ETCS signalling system will be introduced to enable increased capacity
on the network. It will be rolled out over several stages starting with a pilot program on the Shorncliffe Line in 2022 with early works commencing in late 2019. As part of these early works, trains and tracks will be fitted out with ETCS equipment which sends continuous data about the position, direction and speed of trains and enables the system to calculate a safe maximum running speed for each train. The ETCS will be delivered by Hitachi Rail STS.

Cross River Rail is being delivered with the help of Project DNA, the CRRA’s Project Digital Network Approach.

“It is a complete digital twin of the Cross River Rail project. Now, we are currently working in the space of 3D and 4D, but developing additional dimensions as we move forward.”

Lynch explains how the digital twin was developed, “where previously we built separate systems and models, here we’re using a common data environment.”

“Essentially, it is one model with multiple applications to be used by multiple
teams, so whether in the space of project delivery, program controls, communications and engagement or future precinct and planning and delivery, we’re using the one integrated model.”

The model is built in three layers according to Lynch, the first being the Building Information Modeling (BIM) at the core of the model.

“The second layer gives us geographic information system (GIS) mapping, which enables us to move from the 2D into the 3D environment, while the third layer uses the unreal gaming engine to provide an interactive and virtual reality experience.”

The collaborative approach enabled by Project DNA helps in the design, construction, management and operation of the assets built, says Lynch. It will also improve the on- time and on-budget delivery of the project.

The first stage of demolition for the Cross River Rail has commenced and Cross River Rail is now well into the delivery phase. An 85-metre tower crane will be used to bring down three buildings at the Brisbane Transit Centre site. Each building will be demolished level by level, which will take up to a year.

METRONET

A historic lack of investment into public transport resulted in the significant sprawl of Western Australia’s capital city, particularly north-south along the coast. This is why the Metronet initiative, the single largest investment in Perth’s public transport, is about unlocking the latent capacity within the existing network, according to executive director of Infrastructure, Planning and Land Services Owen Thomas.

Thomas says that, ultimately, the initiative will close to triple the capacity of the existing network through targeted investments, including a high capacity signalling system and more trains.

Metronet is the state government’s long- term plan, equally focused on transport infrastructure as on land use outcomes, which will see new communities created as a result of investment. The underpinning target is a 45 per cent increase in dwellings near high frequency transport infrastructure by 2031. As part of delivering against that, the state’s Department of Communities, which largely delivers social housing, is targeting their investment program around specific Metronet sites as part of a social and affordable housing package.

Fundamentally, the initiative involves the creation of 72km of new railway, up to 18 new stations, the removal of eight level crossings, the replacement of the ageing A series rail car fleet and acquisition of an expanded fleet of 246 new C-series railcars, and the optimisation of nearly 5000 hectares of land.

According to Thomas, the most significant and challenging aspect of the project is the implementation of the communications- based train control (CBTC) across the network.

The final business case for the system is currently under consideration. According to Thomas, once it is rolled out, the signalling system will enable more frequent services, every 4 minutes in peak.

Through early works, Thomas says that his transport infrastructure team, working in conjunction with the station precincts development team, have found that it will take $20-$25 million for other enabling infrastructure, such as utilities, to be delivered at the stations.

“We’ll likely see the rail infrastructure delivered within four to five years from the project commencement, but regarding the longer-term outcomes, we will not see many of the station precinct developments on site until up to 15 to 30 years away. So, one of the key challenges is how to incrementally stage those outcomes so that you get the long-term benefits you want but don’t have a sterile station environment from day one.”

In late December, “NEWest Alliance” was awarded a major Metronet contract
for $1.25bn, to deliver the Yanchep Rail Extension and the Thornlie-Cockburn Link. The consortium comprises CPB Contractors and Downer, who will start construction work in mid-2020.

The project will add 17.5 kilometres of rail to connect the Armadale and Mandurah lines through existing stations at Thornlie and Cockburn Central. The new link will include two new stations at Ranford Road and Nicholson Road.

The Thornlie-Cockburn Link will be the first east-west connection between rail lines on the Perth network. It will involve replacing a pedestrian level crossing with a footbridge, duplicating the Canning River Rail Bridge, and modifying the Ranford Road Bridge.

The Yanchep Rail Extension will deliver the last proposed section of the Joondalup Line, from Butler to Yanchep, along a 14.5km route. It will public transport journey times by at least 30 minutes to and from the city.

It’s estimated that by 2031, the Thornlie- Cockburn Link and Yanchep Rail Extensions will serve a population catchment of 400,000 people.

Downer EDI was named as the preferred proponent to build the major rail components at one of Metronet’s level crossing removal projects, at Denny Avenue.

This level crossing removal will be delivered through two design and construction contracts and will include raising more than 800 metres of track and associated infrastructure to enable a new road underpass.

Early works on the project began in 2019 with geotechnical testing, demolition of buildings and removal of a number of Railway Avenue trees. Utility relocation will start in early 2020.

Also in late December, Jacobs was named the preferred proponent to create the business case for the removal of the other six level crossings on the Armadale Line. Preliminary planning identified the potential for more crossings to be included in the project scope.

“[2020] is shaping up to be a defining year for Metronet construction. Perth will have six Metronet projects under construction at once, creating thousands of local jobs and opportunities for local business,” said premier Mark McGowan.

The other major Metronet contract, to deliver the main works for the Morley- Ellenbrook Line, will not be announced until late 2020.

The Morley-Ellenbrook Line will connect the north-eastern suburbs to the broader rail network and is the signature Metronet project. It will include 21km of rail, new stations, two underpasses to allow the rail line to enter and exit the Tonkin Highway median, associated infrastructure to connect to the existing line, road and bridge reconfiguration works and integration across other projects.

Due to the complexity of the Morley- Ellenbrook Line project, the works are divided into four packages, including the Bayswater Station Upgrade (to be awarded in early 2020), the Tonkin Gap project (civil and structural works to allow access in and out of the Tonkin Highway, to be awarded in mid-2020), the forward works and the main works.

The forward works will be delivered under a series of standalone contracts, managed by the PTA and will include geotechnical field investigations, survey works, and the relocation and protection of the in-ground and overhead services of both the PTA and third-party assets.

Main works will be delivered through a competitive alliance contract. It will include the design, construction and commissioning of rail track, systems and five stations. This will include bulk earthworks and retaining, structures, grade separations, roads and drainage.

CITY RAIL LINK

From transferring 14, 000-tonne historic buildings to new foundations to avoiding volcanic lava flows, the Auckland City Rail Link (CRL) project has been one of the more challenging transport infrastructure projects in the Australian/New Zealand pipeline.

Similar to other jurisdictions however, Auckland has had a significant population increase. Since 2010, Auckland’s population has risen by 50 per cent.

“We were at a stage where the road network was unable to cope,” City Rail Link’s CEO, Dr. Sean Sweeney, said.

When a new station was built in 2003, it took until 2014 for the line to be electrified and new rollingstock provided. This resulted in the doubling of patronage numbers.

“That passenger growth has continued ever since and City Rail Link has an ever-increasing need for public transport.”

Construction towards the $4.4bn project officially commenced in 2018 with preliminary works ongoing since 2016. Its scope consists of the construction of twin 3.5 km long double-track rail tunnels underneath Auckland’s city centre, between Britomart Transport Centre and Mount Eden Railway Station.

Two new underground stations will be constructed at Aotea and Karangahape. Britomart will be converted from a terminus station into a through station and Mount Eden Station will be completely rebuilt with four platforms to serve as an interchange between the new CRL line and the existing Western Line. Wider network improvements are also part of the project.

It is slated for completion by 2024.

“Similar to Sydney and Melbourne, we’ve got some form of a loop. The Western line and the Southern line converge at one railway station with the Eastern line, so all of Auckland’s rail traffic goes into the Britomart station and then basically stops there so that the trains get backed up, full or not,” Sweeney said.

“Essentially, what City Rail Link is seeking to do is make Britomart a through station and extend the line back up to the rail network so you can run trains in both directions. Then, by enabling longer, nine car trains, with longer platforms, we can triple the capacity of the rail network.”

This means increasing capacity from 14,000 pph to 54,000 pph into the CBD, allowing for a train every ten minutes in peak.

“By our calculations that’s the equivalent of 16 lanes of traffic into the city centre in peak,” Sweeney said.

This will double the number of people within 30 minutes of NZ’s biggest employment hub, bringing with it significant commercial and residential opportunities around stations.

Though early works commenced in 2016, Sweeney explains that about 10 years ago a forward-thinking Auckland mayor decided to start the project without funding from central government.

“This project had quite an unusual start. The mayor realised that to make Britomart a through station someone had to start building tunnels underneath the city, so Auckland council went out and started construction without central government support which was a very brave thing to do.

“They managed it with a whole range of contracts and multiple contracting types, which made it a little bit confusing but it was what they had to do to get going, and it’s gotten off with different forms of construction, bored tunnels, cut and cover tunnels, etc. There’s a really complex grade separation into existing railway lines.”

One of the challenges for the project is that Auckland is built on volcanoes “some of which erupted as recently as 800 years ago, which is very recent geologically”.

“So, to try and avoid some of the recent lava flows we built an incredibly complex geological model. We used the information that was available to us to plot the safest route. We used this model to locate the top striations, so to avoid some of the most recent lava flows. That was a very complex investigation and we have made that model available to the bidders.”

Another challenge is the current size of the infrastructure pipeline across a number of sectors in Australia and New Zealand.

Over an eighteen-month period, Sweeney tracked the pipeline from $80bn in September 2017 to more than double that in August 2018, and then $220bn in February 2019.

“I’ve never encountered this extent of growth and the way that this complicates what we have to do and the effect it has on our market is a real stretch. Certainly, historically New Zealand has built very little in 20 years and so, even getting major international contractors to take us seriously and come and bid for us was a big piece of work.”

However, early works are now “pretty much completed” according to Sweeney.

Moving forward, the agency has wrapped up the outstanding works – including the remaining tunnels, stations and rail systems infrastructure, as well as the related wider network and tracks – into one contract, Contract 3, to be delivered by a “Grand Alliance”.

The alliance consists of: Downer, AECOM, Tonkin + Taylor, WSP Opus, Soletanche Bachy, and Vinci Construction.

In October 2019, the demolition of thirty empty buildings demolished near the Mt Eden railway station began. This will ensure space for the construction of the southern portal for the City Rail Link’s twin tunnels. The cleared site will be used as a staging area for a Tunnel Boring Machine and other machinery.

The first phase of this demolition is due to be completed in March 2020 , and is being managed by the alliance.

MELBOURNE METRO

During January, works towards Melbourne’s metro tunnel ramped up with crews working throughout the month to excavate the final section of the tunnel’s entrance and make room for the new track which will connect existing lines to the tunnel.

The crews will complete major concreting works at the tunnel entrance, pouring the final sections of the tunnel roof slab and installing the tunnel support structures.

“It’s now two years since we signed the contract and we’re well up and running at seven construction sites along the alignment,” Tunnel and Stations package director at Rail Projects Victoria, Linda Cantan, said.

As package director Cantan has overseen the procurement and contract negotiation for the $6bn package to build five new underground stations as well as the tunnel itself. She is responsible for managing the contract throughout construction.

A number of companies are building the tunnel, and construction is split across several work packages.

Early works to relocate services and prepare the construction sites were delivered by John Holland KBR. New tunnels and stations are being built through a Public Private Partnership, named the Cross Yarra Partnership consortium which includes: Lendlease Engineering, John Holland, Bouygues Construction and Capella Capital. Yarra Trams will deliver tram infrastructure works.

Rail systems including signalling and systems integration work will be provided
by CPB Contractors and Bombardier Transportation, while a consortium comprising John Holland, CPB Contractors and AECOM will deliver rail infrastructure works including the tunnel portals and realignment of existing rail lines.

The project is projected to be complete by 2025.

“We’re creating is a dedicated rail line between Sunbury and Dandenong. People ask why a dedicated rail line, by taking capacity out of the city loop we free up extensive capacity through the rest of the rail network.”

The Melbourne Metro Rail Project includes twin nine-kilometre rail tunnels between South Kensington and South Yarra and five new underground stations.

The project will take three of the busiest train lines (Cranbourne, Pakenham and Sunbury lines) through a new tunnel under the city and thus free up space in the city loop to run more trains in and out of the suburbs.

“We have 4 tunnel boring machines doing our tunnelling, which were launched from our two logistics sites at North Melbourne and Anzac Station. Meg and Joan are travelling out to the west at the moment.

“Joan has travelled 470 metres out of north Melbourne, and we’ve had to negotiate the city link viaduct under the Mooney Creek. Meg has gone about 137 metres. We’re also travelling along all of the rail network, so extensive work is needed to make sure we’re doing that in a safe way. To date progress has been very good and in fact the grand settlement has been better than predicted.

“On the eastern side of the alignment, we have Millie and Alice who will launch early next year. They’ve been delivered to Domain, beside Anzac station, and will launch in the first half of 2020. They will be heading out to the eastern portal, then be retrieved and brought back to be relaunched and head towards the city.”

“We’re in quite a narrow corridor and have retaining walls to build to ensure that there’s no settlement of the existing tracks, but we’re working in a very tight environment to create those exits and entrances to the tunnel structures. The PPP is constructing a shaft in that area for the TBM retrieval early in 2020.”

“We’re developing these stations for ten car, high capacity metro trains, which will be procured under a separate PPP. As such our construction boxes are about 250 metres long and the width, depending on the station, about 25 to 30 metres,” Cantan explains.

The Eastern tunnel entrance stops beyond South Yarra station as there is not enough room in the corridor.

“What we’re trying to do here is to put another two train lines in a very congested corridor, where we have multiple train lines coming in from the South East.

“This is another area where we have our Rail Infrastructure Alliance working alongside the PPP. The PPP can build their shaft, that will be used for the extraction of the TBM, right next to where the Rail Infrastructure Alliance are doing the cut and cover structure.”

“We’re now underground in a lot of locations so I keep saying to people: be patient with us because we don’t open till 2025, but we’re now underground, tunnelling, excavating and starting the build out of our stations,” Cantan concludes.

NZ City Rail Link commences next stage of construction

Building works have started on the Aotea underground station in central Auckland part of New Zealand’s City Rail Link (CRL).

Dale Burtenshaw, deputy project director for the Link Alliance consortium which is building the stations and tunnels for the CRL project, said construction of the Aotea station under the intersection is “massive in scale”.

Construction of the station, platform and tunnels continues will continue below ground until 2021.

Wellesley Street West intersection with Albert Street and Mayoral Drive will close to road traffic from Sunday, 1 March 2020 and is set to reopen in a year.

This follows the removal of the information hub building in the middle of Beresford Square last month to construct the station under nearby Karangahape Road.

The CRL is set to be a 3.45km twin-tunnel underground rail link up to 42 metres below the Auckland city centre.

The depth of the two new underground stations will be 11m at Aotea and 33m at Karangahape Road.

The CRL will extend the existing rail line underground through Britomart, to Albert, Vincent, and Pitt Streets, and then cross beneath Karangahape Road and the Central Motorway Junction to Symonds Street before rising to join the western line at Eden Terrace where the Mount Eden Station is located.

The project was launched in 2017 and is estimated to cost $4.419 billion by the 2024 completion date.

New Zealand’s passenger network back in service

A work blitz which kept some of New Zealand’s major transport networks closed over the summer break is now over and passenger services have returned.

A 10-day shutdown, ending on the 5th of January, enabled a crew of more than 200 to perform maintenance work across 15 different sites in Wellington.

Foundations were installed for 80 new masts for overhead power lines, some of which are more than 80 years old and needed to be replaced.

“Under normal circumstances this work would take 20 weeks to complete, without the network being closed to trains,” a KiwiRail spokesperson said.

The crew, comprising KiwiRail staff and contractors, also began work on a new pedestrian underpass at Trentham Station.As part of the work, rail tracks were temporarily removed, signal and power systems disconnected, and major earthworks completed before the tracks and power were reinstated so trains could travel through the section of line.

“We successfully fitted months of essential maintenance activities into just 10 days. Our staff and contractors operating at these sites completed a huge amount of work and deserve a well-earned break after working through the holiday period,” KiwiRail’s chief operating officer of Capital Projects, David Gordon, said.

The work was a resounding success, according to Gordon.

“We completed rigorous inspections of the track and overhead equipment and ran test trains through critical sites to ensure the network was safe for trains to be back up and running.”

Meanwhile, in Auckland, for City Rail Link tunnel works to commence the track around Mt Eden Station had to be re-aligned. This will also allow for the future redevelopment of the station.

Work is still ongoing in Ōtāhuhu as KiwiRail continues to work on the rail infrastructure so that Ōtāhuhu Station can facilitate more frequent train services once the City Rail Link opens in 2024.

Auckland Transport says it is operating a special timetable to accommodate this work.

Project Update: City Rail Link

From transferring 14,000-tonne historic buildings to new foundations to avoiding volcanic lava flows, the Auckland City Rail Link (CRL) project has been one of the more challenging transport infrastructure projects in the Australian/New Zealand pipeline.

Similar to other jurisdictions however, Auckland has had a significant population increase. Since 2010, Auckland’s population has risen by 50 per cent.

“We were at a stage where the road network was unable to cope,” City Rail Link’s CEO, Dr. Sean Sweeney, said at AusRAIL PLUS 2019.

When a new station was built in 2003, it took until 2014 for the line to be electrified and new rollingstock provided. This resulted in the doubling of patronage numbers.

“That passenger growth has continued ever since and City Rail Link has an ever-increasing need for public transport.”

Construction towards the $4.4 billion project officially commenced in 2018 with preliminary works ongoing since 2016. Its scope consists of the construction of twin 3.5 km long double-track rail tunnels underneath Auckland’s city centre, between Britomart Transport Centre and Mount Eden Railway Station.

Two new underground stations will be constructed at Aotea and Karangahape. Britomart will be converted from a terminus station into a through station and Mount Eden Station will be completely rebuilt with four platforms to serve as an interchange between the new CRL line and the existing Western Line.Wider network improvements are also part of the project.

It is slated for completion by 2024.

“Similar to Sydney and Melbourne, we’ve got some form of a loop. The Western line and the Southern line converge at one railway station with the Eastern line, so all of Auckland’s rail traffic goes into the Britomart station and then basically stops there so that the trains get backed up, full or not,” Sweeney said.

“Essentially, what City Rail Link is seeking to do is make Britomart a through station and extend the line back up to the rail network so you can run trains in both directions. Then, by enabling longer, nine car trains, with longer platforms, we can triple the capacity of the rail network.”

This means increasing capacity from 14,000 pph to 54,000 pph into the CBD, allowing for a train every ten minutes in peak.

“By our calculations that’s the equivalent of sixteen lanes of traffic into the city centre in peak,” Sweeney said.

This will double the number of people within 30 minutes of NZ’s biggest employment hub, bringing with it significant commercial and residential opportunities around stations.

Though early works commenced in 2016, Sweeney explains that about ten years ago a forward-thinking Auckland mayor decided to start the project without funding from central government.

“This project had quite an unusual start. The mayor realised that to make Britomart a through station someone had to start building tunnels underneath the city, so Auckland council went out and started construction without central government support which was a very brave thing to do.

“They managed it with a whole range of contracts and multiple contracting types, which made it a little bit confusing but it was what they had to do to get going, and it’s gotten off with different forms of construction, bored tunnels, cut and cover tunnels, etc. There’s a really complex grade separation into existing railway lines.”

One of the challenges for the project is that Auckland is built on volcanoes, “some of which erupted as recently as 800 years ago, which is very recent geologically”.

“So, to try and avoid some of the recent lava flows we built an incredibly complex geological model. We used the information that was available to us to plot the safest route. We used this model to locate the top striations, so to avoid some of the most recent lava flows. That was a very complex investigation and we have made that model available to the bidders.”

Another challenge is the current size of the infrastructure pipeline across a number of sectors in Australia and New Zealand.

Over an eighteen-month period, Sweeney tracked the pipeline from $80 billion in September 2017 to more than double that in August 2018, and then $220 billion in February 2019.

“I’ve never encountered this extent of growth and the way that this complicates what we have to do and the effect it has on our market is a real stretch. Certainly, historically New Zealand has built very little in 20 years and so, even getting major international contractors to take us seriously and come and bid for us was a big piece of work.”

However, early works are now “pretty much completed” according to Sweeney.

Moving forward, the agency has wrapped up the outstanding works (highlighted in yellow) – including the remaining tunnels, stations and rail systems infrastructure, as well as the related wider network and tracks – into one contract, Contract 3, to be delivered by a ‘Grand Alliance’.

The alliance consists of: Downer, AECOM, Tonkin + Taylor, WSP Opus, Soletanche Bachy, and Vinci Construction.

In October 2019, the demolition of thirty empty buildings demolished near the Mt Eden railway station began. This will ensure space for the construction of the southern portal for the City Rail Link’s twin tunnels. The cleared site will be used as a staging area for a Tunnel Boring Machine and other machinery.

The first phase of this demolition is due to be completed in March 2020 , and is being managed by the alliance.

Demolitions begin to clear the way for Auckland’s City Rail Link

Thirty empty buildings are being demolished near the Mt Eden railway station, as part of Auckland’s City Rail Link project.

Demolition works started this week to provide space for the construction of the southern portal for the City Rail Link’s twin tunnels. The cleared site will be used as a staging area for a Tunnel Boring Machine and other machinery.

The first phase of this demolition is due to be completed next March, and is being managed by the Link Alliance which is delivering the stations and tunnels of the City Rail Link.

Construction of a new Mt Eden Station will allow the existing tracks to be moved around to connect the Western Line with the tunnels.

From Mt Eden Station, the City Rail Link will run under the Newton ridge and central motorway junction before it reaches new underground stations at Karangahape Road and Mayoral Drive/Albert Street and the redeveloped Britomart Station in lower Queen Street. The project will be completed in 2024.

“Demolition is a significant and visible development for the project, clearing a site that will essentially be ‘base camp’ for the substantial programme of construction to complete New Zealand’s biggest infrastructure project,” said City Rail Link’s Chief Executive Dr Sean Sweeney.

“In many ways Monday will mark the end of the project’s beginning. When these buildings have gone, the way will be clear for us to get below ground, complete the tunnels, build two underground stations, redevelop Mt Eden Station and then handover a world class rail system an international city like Auckland deserves,” said Sweeney.

City Rail Link began buying the first of the buildings to be demolished back in 2012 and bought the last was in 2015. They are located in Flower, Nikau, Ruru, Shaddock and Ngahura Streets. Demolition will start in Shaddock Street.

Measures are in place to reduce the impacts of demolition, according to Dale Burtenshaw, the Deputy Alliance Project Director.

The demolition area has been isolated by hoardings or fencing and an independent specialist will monitor noise and vibration limits to make sure they remain inside approved limits. However, most of the buildings are low-rise with concrete block walls and either timber or steel framing which will help avoid any extensive vibration. A specialist company is helping remove asbestos found in some of the buildings.