Delivering concrete segments to the Metro Tunnel

The tunnel boring machines responsible for digging Melbourne’s Metro Tunnel started work in August 2019, but the concrete segments that will line the new tunnel have had a much longer journey.

Site clearance works continue at City Square

Their start their life behind an anonymous gate in Ravenhall, next door to the Regional Rail Link tracks.

Metro Tunnel tunnel lining segment manufacturing facility at Ravenhall

But the ‘tunnel lining segment manufacturing facility’ sign gives it away.

Metro Tunnel tunnel lining segment manufacturing facility at Ravenhall

Overhead cranes travel over the casting yard.

Production started early, so that a stockpile of tunnel lining segments could be built up.

180 segments being poured a day.

The first segments were delivered in August 2019.

Driven across Melbourne six at a time on the back of a semi-trailer.

Semi trailer delivers a load of six precast concrete tunnel segments to the site

Until they arrived at the future North Melbourne station site.

Semi trailer delivers a load of six precast concrete tunnel segments to the site

In September work on the shed over the station box was still underway.

Shed taking shape over the station box

But was completed in October.

Completed shed over the station box for the storage of precast concrete tunnel segments

Ready to store the concrete segments, before they are lowered into the tunnel.

Precast concrete tunnel segments ready to be lowered into the tunnel

Loaded onto a rubber tyred TBM support vehicle.

And driven through the tunnel to the TBM itself.

Which then assembles them into a tunnel wall.

A sidenote on the gantry cranes

The gantry cranes at the casting yard were supplied by Australian manufacturer Eilbeck Cranes, as were cranes at the Melbourne CBD worksites.

Lifting a six sided Calbah Engineering kibble loaded with spoil out of the City Square shaft

Those cranes seem to be more successful than those at Parkville station – dismantled due to safety concerns.

Meanwhile on the West Gate Tunnel

The West Gate ‘Tunnel’ might be predominately surface roads, but it actually features two tunnels: 4 kilometre long outbound and 2.8 kilometre long inbound.

Freeway widening works beside Richards Court in Brooklyn

The precast concrete segments for this project are being manufactured by LS Precast in Benalla, served by a dedicated rail siding.

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2 Responses to “Delivering concrete segments to the Metro Tunnel”

  1. mich says:

    That’s the second story about tunnel lining segments that I have seen this week.

    Geoff Marshall’s latest video on youtube is about tunnel lining segments.

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