Metro Rail Tunnel - Building Thread

 
  bevans Site Admin

Location: Melbourne, Australia
This is going well but union issues this week https://www.railpage.com.au/news/s/union-stops-work-on-metro-rail-tunnel-due-to-first-aid-bed-height

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  True Believers Chief Commissioner

1.4km over 68 days (my count, couldn't find an official one) is 20.6m per day

@tayser do you have any info on whether this puts Joan ahead/behind schedule?
John.Z
According to the website: TBM Joan started digging mid-May (let's go with 15th of May) and came out (27th of August)

So more accurately that's about 100 days for 1.4 kilometres, with a more accurate average about 14 m per day. It's definitely much faster than the 10m per day the TBMs could operate on average. Although this section is a relatively straight section, the next one will involve a lot of curves, we will see how that goes.
  John.Z Assistant Commissioner

1.4km over 68 days (my count, couldn't find an official one) is 20.6m per day

@tayser do you have any info on whether this puts Joan ahead/behind schedule?
According to the website: TBM Joan started digging mid-May (let's go with 15th of May) and came out (27th of August)

So more accurately that's about 100 days for 1.4 kilometres, with a more accurate average about 14 m per day. It's definitely much faster than the 10m per day the TBMs could operate on average. Although this section is a relatively straight section, the next one will involve a lot of curves, we will see how that goes.
True Believers
Ah ok. The post I saw was June 28ish, couldn't see any other info. Must've been Meg that launched in June.
  ngarner Assistant Commissioner

Location: Seville
TBM Millie has dug 110m in 5 days based on the Metro tunnel website's latest update and Meg has done a similar distance. They are certainly achieving far greater distances than anticipated.

Neil
  ngarner Assistant Commissioner

Location: Seville
Metro Tunnel's September update for Domain has Millie at 1.38km and Alice at 1.13Km. Millie is now only 320m from the portal and is now expected late this month, at least a few weeks early compared to the last update a month ago. Alice should break through a few weeks later. The re-launch north-bound towards Town Hall is not planned to occur until 2021.

https://metrotunnel.vic.gov.au/__data/assets/pdf_file/0008/456173/Domain-construction-update,-September-2020.pdf

Neil
  CraigieburnLineUser Locomotive Fireman

Not sure if I'm late to the party but the new graphic for the TBMs is pretty slick. Interesting to note that it shows that Joan and Meg will go on from State Library to Town Hall, I thought that was all supposed to be road header so that's interesting but probably covered before



TBM Tracker
  simstrain Chief Commissioner

Well atleast one thing that seems to be going right for Victoria. Looks like some good progress is being made.
  Lockie91 Chief Train Controller

Not sure if I'm late to the party but the new graphic for the TBMs is pretty slick. Interesting to note that it shows that Joan and Meg will go on from State Library to Town Hall, I thought that was all supposed to be road header so that's interesting but probably covered before



TBM Tracker
CraigieburnLineUser
Two things,

For the CBD stations road-headers carved out the central cavern and all the connecting pedestrians links. The TBM's will tunnel along side the central cavern to form the completed stations.

Secondly, I'm sure I've read it somewhere, are all four TBM's being pulled out at Town Hall?

Lockie
  CraigieburnLineUser Locomotive Fireman

Not sure if I'm late to the party but the new graphic for the TBMs is pretty slick. Interesting to note that it shows that Joan and Meg will go on from State Library to Town Hall, I thought that was all supposed to be road header so that's interesting but probably covered before



TBM Tracker
Two things,

For the CBD stations road-headers carved out the central cavern and all the connecting pedestrians links. The TBM's will tunnel along side the central cavern to form the completed stations.

Secondly, I'm sure I've read it somewhere, are all four TBM's being pulled out at Town Hall?

Lockie
Lockie91
That makes a lot of sense, the printed material they had wasn't all that clear to me so that map sparked a few questions. Good to see that alignment in an interactive way though.

It does make sense for them all to be retrieved at the same place in the end so Town Hall makes sense
  justarider Deputy Commissioner

Location: Free at last, free at last
Not sure if I'm late to the party but the new graphic for the TBMs is pretty slick. Interesting to note that it shows that Joan and Meg will go on from State Library to Town Hall, I thought that was all supposed to be road header so that's interesting but probably covered before
Two things,

For the CBD stations road-headers carved out the central cavern and all the connecting pedestrians links. The TBM's will tunnel along side the central cavern to form the completed stations.

Secondly, I'm sure I've read it somewhere, are all four TBM's being pulled out at Town Hall?

Lockie
Lockie91
4 out at Town Hall is not so scary as it sounds. Its only the cutting heads/module that come out.

The big parts (100m) are retreated back to the launch sites (Anzac and Arden) along with all the support services (air, spoil, deliveries)
  ngarner Assistant Commissioner

Location: Seville
Not sure if I'm late to the party but the new graphic for the TBMs is pretty slick. Interesting to note that it shows that Joan and Meg will go on from State Library to Town Hall, I thought that was all supposed to be road header so that's interesting but probably covered before



TBM Tracker
"CraigieburnLineUser"


The news that the TBMs were going to do State Library to Town Hall only appeared recently and also had me wondering if I'd missed something. Prior to that, as you stated, they were saying that road headers would do the job. Maybe the TBMs have been so efficient that they decided to keep using them.

Neil
  Lockie91 Chief Train Controller

Not sure if I'm late to the party but the new graphic for the TBMs is pretty slick. Interesting to note that it shows that Joan and Meg will go on from State Library to Town Hall, I thought that was all supposed to be road header so that's interesting but probably covered before



TBM Tracker


The news that the TBMs were going to do State Library to Town Hall only appeared recently and also had me wondering if I'd missed something. Prior to that, as you stated, they were saying that road headers would do the job. Maybe the TBMs have been so efficient that they decided to keep using them.

Neil
ngarner
TBMs have been the plan for a long time. The CBD stations will be trinocular, which is three overlapping tunnels. The central cavern or tunnel has been dug out with road headers. The TBM's will dig alongside the central cavan to form the three overlapping tunnels and the station box.

Cut and cover was impossible in the CBD so mined station boxes were the only option.

Lockie
  ngarner Assistant Commissioner

Location: Seville
Not sure if I'm late to the party but the new graphic for the TBMs is pretty slick. Interesting to note that it shows that Joan and Meg will go on from State Library to Town Hall, I thought that was all supposed to be road header so that's interesting but probably covered before



TBM Tracker


The news that the TBMs were going to do State Library to Town Hall only appeared recently and also had me wondering if I'd missed something. Prior to that, as you stated, they were saying that road headers would do the job. Maybe the TBMs have been so efficient that they decided to keep using them.

Neil
ngarner
TBMs have been the plan for a long time. The CBD stations will be trinocular, which is three overlapping tunnels. The central cavern or tunnel has been dug out with road headers. The TBM's will dig alongside the central cavan to form the three overlapping tunnels and the station box.

Cut and cover was impossible in the CBD so mined station boxes were the only option.

Lockie
"Lockie91"


I understood the outer two, of the three, tunnels at both stations were to be dug by road headers, as below:

[From the August Library update]

Tunnelling works
A’Beckett Street site
24 hours, Monday to Sundays, ongoing
• Tunnelling works are continuing 24 hours a day to excavate the platform tunnels on either side of the central cavern within the acoustic shed

What this exactly means is not totally clear to me. Are these side tunnels only for the platforms, do they include the rail line or are the rail line tunnels being dug as Lochie says?

All that would be necessary would be to drag the TBMs through the already dug tunnel and re-launch if my understanding is correct

Neil
  LeroyW Junior Train Controller

Location: Awaiting MM2

I understood the outer two, of the three, tunnels at both stations were to be dug by road headers, as below:

[From the August Library update]

Tunnelling works
A’Beckett Street site
24 hours, Monday to Sundays, ongoing
• Tunnelling works are continuing 24 hours a day to excavate the platform tunnels on either side of the central cavern within the acoustic shed

What this exactly means is not totally clear to me. Are these side tunnels only for the platforms, do they include the rail line or are the rail line tunnels being dug as Lochie says?

All that would be necessary would be to drag the TBMs through the already dug tunnel and re-launch if my understanding is correct

Neil
ngarner

Your understanding matches mine - the entire station box (central cavern and two side tunnels containing rail line and platform edge) are dug by road headers and then the TBMs will be moved through to start on the other side: pretty much what is happening at Parkville at the moment except without the trinocular design.

I don't think you'd want to run a TBM along the edge of an open cavern, would make a huge mess!
  Lockie91 Chief Train Controller


I understood the outer two, of the three, tunnels at both stations were to be dug by road headers, as below:

[From the August Library update]

Tunnelling works
A’Beckett Street site
24 hours, Monday to Sundays, ongoing
• Tunnelling works are continuing 24 hours a day to excavate the platform tunnels on either side of the central cavern within the acoustic shed

What this exactly means is not totally clear to me. Are these side tunnels only for the platforms, do they include the rail line or are the rail line tunnels being dug as Lochie says?

All that would be necessary would be to drag the TBMs through the already dug tunnel and re-launch if my understanding is correct

Neil
Your understanding matches mine - the entire station box (central cavern and two side tunnels containing rail line and platform edge) are dug by road headers and then the TBMs will be moved through to start on the other side: pretty much what is happening at Parkville at the moment except without the trinocular design.

I don't think you'd want to run a TBM along the edge of an open cavern, would make a huge mess!
LeroyW
Sorry, yes this is correct. Im not sure what I've read. Too many construction updates all mashing into one.

Road-Headers are most definitely digging out the entire caverns and the TBM's will be dragged through.

Lockie
  bevans Site Admin

Location: Melbourne, Australia
Melbourne Uni have just announced TBM Joan has just broken through into the new Parkville Station from Arden.  Things are progressing nicely.

https://www.linkedin.com/posts/university-of-melbourne_metro-tunnel-parkville-breakthrough-activity-6708305403689742336-pNjT
  justarider Deputy Commissioner

Location: Free at last, free at last
Melbourne Uni have just announced TBM Joan has just broken through into the new Parkville Station from Arden.  Things are progressing nicely.

https://www.linkedin.com/posts/university-of-melbourne_metro-tunnel-parkville-breakthrough-activity-6708305403689742336-pNjT
bevans
Announced 27th August. 2 weeks ago


https://youtu.be/YlEy815Vldg
  The Vinelander Minister for Railways

Location: Ballan, Victoria on the Ballarat RFR Line
Well at least one thing that seems to be going right for Victoria. Looks like some good progress is being made.
simstrain

Was an interesting series on SBS about the new driverless metro system up there in Sydney town...after having seen part of its early construction a few years ago.

Not sure if it started under Gladys or Bob, but it's clearly a spectacular piece of infrastructure and worth a visit up north soon...perhaps before the XPT disappears Question

However in Melbourne we have basalt...bluestone...tougher than nails to dig through, hence the glacial pace of tunneling compared to the hot knife through butter tunnelling in Sydneys sandstone geology.

Overall though...so much infrastructure planned and underway with limited numbers of consortia to tender for the projects in our three largest capitals, we don't want a situation where governments have to ask consortia to take on projects so they are underway; because we are near a point where the shortage of engineers means that projects aren't being tendered for due to the insufficient qualified people to undertake the work

Mike.
  justarider Deputy Commissioner

Location: Free at last, free at last
Well at least one thing that seems to be going right for Victoria. Looks like some good progress is being made.
However in Melbourne we have basalt...bluestone...tougher than nails to dig through, hence the glacial pace of tunneling compared to the hot knife through butter tunnelling in Sydneys sandstone geology.

Mike.
The Vinelander
sorry Mike.
The tunnels mostly missed the basalt field and run through the Melbourne formation.
Mostly Sandstone , silt and more silt. Even messier than the hard stuff to waterproof.

see https://metrotunnel.vic.gov.au/__data/assets/pdf_file/0018/51084/MMRP-Technical-Appendix-P-Ground-Movement-and-Land-Stability-Part-1.pdf/ (page 18) for full detail

cheers
John
  The Vinelander Minister for Railways

Location: Ballan, Victoria on the Ballarat RFR Line
Well at least one thing that seems to be going right for Victoria. Looks like some good progress is being made.
However in Melbourne we have basalt...bluestone...tougher than nails to dig through, hence the glacial pace of tunneling compared to the hot knife through butter tunnelling in Sydneys sandstone geology.

Mike.
sorry Mike.
The tunnels mostly missed the basalt field and run through the Melbourne formation.
Mostly Sandstone , silt and more silt. Even messier than the hard stuff to waterproof.

see https://metrotunnel.vic.gov.au/__data/assets/pdf_file/0018/51084/MMRP-Technical-Appendix-P-Ground-Movement-and-Land-Stability-Part-1.pdf/ (page 18) for full detail

cheers
John
justarider

Thanks for that info John, I'm always happy to stand corrected. Smile

Thanks for supplying the geological map.
Perhaps we had more basalt up here in Ballan when they were digging the footings for the new platform road.

Mike.
  justarider Deputy Commissioner

Location: Free at last, free at last
Thanks for that info John, I'm always happy to stand corrected. Smile
Thanks for supplying the geological map.
Perhaps we had more basalt up here in Ballan when they were digging the footings for the new platform road.

Mike.
The Vinelander
you're welcome. It's a common mis-conception about the basalt plain.

The lava flow took one look at Melbourne and turned around. Just like some writers on RP.

BTW. mate in the swim pool game.
Boss thought a display at Melton was a good idea. The hole cost more than a new house.

cheers
John
  Heihachi_73 Chief Commissioner

Location: Terminating at Ringwood
Any chance we can tart up a Hitachi and run it through there on opening day when everyone expects to see a shiny new train? Laughing
  ngarner Assistant Commissioner

Location: Seville
TBM Millie is expected to break through at South Yarra before September 21st as Metro Tunnel are advising of over-size load transfers back to the domain site between 1 and 5am on that night; vis

TBM PART DELIVERY SCHEDULE
(Note: Subject to change)

Oversized TBM parts will arrive at the Anzac Station site between 1am – 5am on the following dates:

Monday 21 September 2020 (unloaded overnight)

https://metrotunnel.vic.gov.au/disruptions/transport-changes/oversized-deliveries

That means that break through should be in the next few days unless something goes wrong. The info on Alice is not as precise but it appears to be close behind as advice is that both will be have broken through before the end of this month

Neil
  ngarner Assistant Commissioner

Location: Seville
Further confirmation from Metro Tunnel about TBM progress in the east:
"Millie, the first TBM will break through into Eastern Portal this week, with Alice to follow approximately two weeks later. 24/7 works for TBM disassembly and retrieval will commence as soon as Millie has completed her tunnelling drive."

This week is almost gone so reasonably we can expect breakthrough by Sunday.

https://metrotunnel.vic.gov.au/construction/south-yarra/work-notifications

Neil
  The Vinelander Minister for Railways

Location: Ballan, Victoria on the Ballarat RFR Line
Thanks for that info John, I'm always happy to stand corrected. Smile
Thanks for supplying the geological map.
Perhaps we had more basalt up here in Ballan when they were digging the footings for the new platform road.

Mike.
you're welcome. It's a common mis-conception about the basalt plain.

The lava flow took one look at Melbourne and turned around. Just like some writers on RP.

BTW. mate in the swim pool game.
Boss thought a display at Melton was a good idea. The hole cost more than a new house.

cheers
John
justarider

Some of the basalt boulders, about 8 were returned to the Ballan station BLU landscaping works yesterday. One deposited at the station entrance by the old water tower must be 2 tonnes. No-one is going to be moving this monster anywhere in a hurry.

Mike.

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