The tunnel boring machine will begin digging its way beneath the harbour from Rozelle to the northern end of the CBD within days.
Almost five years after a giant machine began tunnelling Sydney’s first rail line beneath the harbour, another massive borer is about to start churning through clay, sediment and rock to create the city’s second under-harbour crossing.
With her trip under the harbour starting next week, Jesse is the fifth giant tunnelling machine to be launched for theShe will be followed later this year by another boring machine to complete the twin tunnels on the section of the new metro rail line between the Bays and CBD. The tunnels will extend under the Domain, passing beneath the heritage-listed State Library.
Sydney Metro chief executive Peter Regan said it was more complex tunnelling under the harbour due to pressure from seawater above and softer soil conditions.“They don’t move as fast, but think about where they are going under the water,” he said of the specialised boring machines excavating under the harbour.
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