Brisbane’s Cross River Rail engineering know-how transforms Brisbane

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Queensland’s LNP opposition has referred to as for the $5.4 billion Cross River Rail mission to be renamed after the late Queen Elizabeth II.

LNP chief David Crisafulli mentioned it was “solely becoming we honour her service” as he launched a petition for the identify change on Wednesday.

“Queenslanders throughout our state have liked and admired Queen Elizabeth II,” he mentioned.

“At this time we launch a petition to rename Cross River Rail, Queensland’s first underground rail line, to the Elizabeth Line.

“This can be a once-in-a-lifetime alternative for Queensland to perpetually honour her life and legacy.”

However Queensland Treasurer Cameron Dick accused the opposition of harvesting petitioners’ information.

“Why are they internet hosting a petition on a celebration political web site, why are they not utilizing a parliamentary petition?” he mentioned.

Mr Dick mentioned it was disrespectful to launch the petition on such an internet site earlier than the monarch’s funeral.

In the meantime, a fancy mixture of design and engineering ideas proceed deep underground on the mission.

Stretching from Dutton Park to Bowen Hills, Cross River Rail is a brand new 10.2-kilometre line that features 5.9km of dual tunnels below the Brisbane River and CBD.

The mission is scheduled to be accomplished in 2024 and operational in 2025 after testing and security checks.

These engineering feats are making all of it potential.

An artist’s impression of Cross River Rail’s Rocklea station.(Provided: Cross River Rail)

Underpinning

Underpinning is the tactic used to make sure the mission crew can tunnel safely beneath the interior northern busway at Roma Road whereas buses are nonetheless operating over it.

It was additionally used to tunnel below the freight flyover, which takes freight trains off the suburban observe straight to the port, close to the Boggo Street website.

A map of the Queensland train lines
A map for the brand new community that’s anticipated to be operational from 2025.(Provided: Queensland authorities)

Cross River Rail senior mission engineer Yasmine Eldin mentioned underpinning was “a switch of load from one construction to a different”.

Concept drawing for new Cross River Rail station
A inventive impression of the Cross River Rail design for Roma Road Station.(Provided: Queensland authorities)

Ms Eldin mentioned the bridge footings for the freight flyover needed to be demolished to permit excavation to create the Boggo Rd website.

Map of tunnel and train line
A diagram reveals how engineers underpinned the freight flyover for the Boggo Rd station.(Provided: Cross River Rail)

“We set hydraulic jacks, fastened them on high of these beams to elevate the burden of the bridge up, we then grouted these beams to the present construction, and lowered the jacks,” she mentioned.

“As soon as we let the jacks go, the burden of the entire bridge assist construction now sits on the brand new underpinning construction.”

scaffolding and cranes fill a construction site
The underground station at Boggo Street is taking form.(Provided: Cross River Rail)

Twisting, lifting beams

Putting in the mezzanine ranges of Cross River Rail’s underground stations — the final stage earlier than passengers take an escalator right down to the station platforms — makes use of a “world-first technique of development”, in line with a mission spokesman.

The engineering crew is twisting and lifting 180 beams weighing 70 tonnes inside station caverns to place them in place, with solely millimetres to spare on all sides.

Queensland Deputy Premier Steven Miles mentioned it was “the engineering equal of keyhole surgical procedure, or a ship in a bottle”.

About 458 particular person segments are being forged to make the mezzanine beams at Woolloongabba.

As much as three segments are used per beam.

underground stairs
The Albert St station excavation mission created Brisbane’s greatest gap.(Provided: Cross River Rail)

Means down beneath

The mission’s Albert Road station field now holds the title for deepest gap excavated in Brisbane.

Reaching 50 metres beneath floor, crews generated greater than 47,000 cubic metres of spoil whereas excavating the outlet, which is able to home the primary new prepare station in Brisbane’s CBD in 120 years.

Twin tunnels

Twin tunnels 5.9 kilometres lengthy now stretch from Dutton Park to Bowen Hills below the Brisbane River and CBD.

Train tunnels under the river
Cross River Rail entails the excavation of dual tunnels beneath the Brisbane River.(Provided: Cross River Rail)

The huge excavation process, which used 165-metre-long tunnel boring machines and 115-tonne roadheaders to take away greater than 400,000 cubic metres of spoil was accomplished on the finish of 2021.

Jumpform development

Cross River Rail’s Woolloongabba station is being constructed utilizing the jumpform technique.

Concrete worksite with scaffolding around it.
An instance of a Cross River Rail jumpform.(Provided: Cross River Rail)

It’s a self-supporting technique of concrete development the place every stage is constructed on high of the final.

“The strategy has helped crews construct the long run transport hub up from the underside of Woolloongabba’s 33-metre-deep station field, with the best level now 21 metres above floor stage,” a mission spokesman mentioned.

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