Thanks Paul, a lot of us take a keen interest in the metro but aren't able to visit all the sites. Your Vlogs are both archival, and a video aerogramme to those "across the miles".
Paul, this is perfect. I am actually doing a Senior Geography Project about the socioeconomic impacts of the Stage 2 Metro Project and it comes with lots of fieldwork. This video helps me so much. Thanks for your work
Good work Paul. Once again they are moving forward with the construction of the Barangaroo Metro Railway Station. I am looking forward to using the Sydney Metro to go there when it's opened sometime in 2023 to 2024... Go Barangaroo!
Thank you Paul. I am gob smaked by the enormity of this part of the Metro project. From earlier reports, there is a huge challenge of nature insofar as the pressure of the harbour water is counter acted by a lot of engineering "magic" to prevent the whole box which is submerged many metres below water level from rising up. Bravo to the engineers and constructers. Pleasae keep us informed in your very adept way of presentation.
As soon as I got onto TH-cam I just knew this video would be ready and waiting to greet me. Another absolutely fantastic presentation. This site looks very sophisticated, it's amazing how a metro station evolves from this! That action with the pre-cast concrete roof section being lowered into place was absolutely fascinating! Very lucky to be in the right place at the right time!
@@prismaticmarcus I reckon, if you hung out there for a morning or afternoon, you'd probably see this for yourself. However, you wouldn't get my commentary!
Bit of guesswork with this one, but I think those things protruding from the end of the Super T girders are ducts for post-tensioning strands. When normally reinforced concrete beams are loaded from above, the bottom edge acts in tension (not good for concrete). To compensate, steel strands are fed through ducts toward the bottom edge of the beam and then locked off at one end. They are then pulled (tensioned) extremely tightly and locked off at the other end, thus squeezing the concrete on the bottom edge of the beam into compression (good for concrete). When a post-tensioned beam is loaded from above, the bottom edge stays in compression. Super T girders are definitely tensioned, I'm just not sure whether they are pre-tensioned (in the factory) or post-tensioned (on site). If it's the former ignore everything you've just read!
They are definitely tensioning strands, but I think those kind of beams are pre-tensioned. Not 100% but fairly sure. I think post-tensioning strands for something that size would normally be in about two or three bunches of strands each in a circular pattern on a flange (whereas pre-tensioning I think the wires are tensioned against a metal plate that is part of the form, that the beam is removed from once the tension in the strands is released). As for why they’re still there I suppose they just leave the strands in and tie them into the rest of the reinforcement?
Thanks so much for these informative vids Paul, however is it possible next if you could check the Pitt St station as you haven't made any vids as such.
and you know what? this vid is the best info i've seen on the station. and i've looked ; ) apart from the nice looking entrance pic. a little glass box with a nice wood roof
Hi Mark, yes information on Barangaroo (and many of the other Sydney Metro stations is sketchy!). I feel I'm doing my bit to plug the gaps with these videos!
That was really interesting Paul, thanks for posting. Do you know whether the red steel girders at the top are temporary or part of the permanent structure?
The red girders are a temporary steel structure to support Hickson road. They were installed prior to the station excavation. When you drive on Hickson road, the station excavation is directly underneath you. It will be removed after the station is complete.
Great question Michael, I was thinking the same thing myself when editing this video. However, judging by the comment below, it looks like they are temporary.
Thanks for the video Paul hope someone with knowledge of the site helps you out. New walkway looks great and getting plenty of visitors. At10:30 workers walking under suspended load. Poor WH&S practice on a major work site. Sad to see workers doing so.
those workers are directly involved in the lift and are looking up at it. avoiding having to walk under might have been difficult. from the perspective of us viewers it seemed more dangerous than it was. i have done some of this sort of work.
Paul. All these new underground railway stations, I think would have to have, emergency fire escape staircases, that would need to be fire proof, and separate from the rest of the structure. In Bangaroo's case its been centrally placed.
The link between Tallawong and St Mary's is most important. This missing link should be built asap. As it will provide for a second link to Penrith. This link is vital to reduce the congestion on the western train line for commuters.
because it pre-cast concrete there are joints and particular care needs to be taken into account in how the reinforcement bar interlocks with the rest of the structure.
Thanks Paul, a lot of us take a keen interest in the metro but aren't able to visit all the sites. Your Vlogs are both archival, and a video aerogramme to those "across the miles".
You're very welcome! I know there are many people watching my vlogs from other cities and countries!
Paul, this is perfect. I am actually doing a Senior Geography Project about the socioeconomic impacts of the Stage 2 Metro Project and it comes with lots of fieldwork. This video helps me so much. Thanks for your work
You're very welcome. Glad my video helped you with your field work!
Good work Paul. Once again they are moving forward with the construction of the Barangaroo Metro Railway Station. I am looking forward to using the Sydney Metro to go there when it's opened sometime in 2023 to 2024... Go Barangaroo!
Glad you enjoyed this video Tony. Yes it's going to be great when it's all open!
Thank you Paul. I am gob smaked by the enormity of this part of the Metro project. From earlier reports, there is a huge challenge of nature insofar as the pressure of the harbour water is counter acted by a lot of engineering "magic" to prevent the whole box which is submerged many metres below water level from rising up. Bravo to the engineers and constructers. Pleasae keep us informed in your very adept way of presentation.
Yes will do. Glad you're enjoying these Sydney Metro videos.
Some magic rock anchors may have been involved.
Always most informative, in-depth and interesting (as are all of your VLOG's), again.....thank you kindly for sharing mate.
You're very welcome Dave. Glad you enjoyed it.
As soon as I got onto TH-cam I just knew this video would be ready and waiting to greet me. Another absolutely fantastic presentation. This site looks very sophisticated, it's amazing how a metro station evolves from this! That action with the pre-cast concrete roof section being lowered into place was absolutely fascinating! Very lucky to be in the right place at the right time!
Yes it was extremely lucky and I was so pleased to see the super-t-beam being lifted before my eyes!
@@TransportVlog bit jealous there...
@@prismaticmarcus I reckon, if you hung out there for a morning or afternoon, you'd probably see this for yourself. However, you wouldn't get my commentary!
Bit of guesswork with this one, but I think those things protruding from the end of the Super T girders are ducts for post-tensioning strands. When normally reinforced concrete beams are loaded from above, the bottom edge acts in tension (not good for concrete). To compensate, steel strands are fed through ducts toward the bottom edge of the beam and then locked off at one end. They are then pulled (tensioned) extremely tightly and locked off at the other end, thus squeezing the concrete on the bottom edge of the beam into compression (good for concrete). When a post-tensioned beam is loaded from above, the bottom edge stays in compression. Super T girders are definitely tensioned, I'm just not sure whether they are pre-tensioned (in the factory) or post-tensioned (on site). If it's the former ignore everything you've just read!
They are definitely tensioning strands, but I think those kind of beams are pre-tensioned. Not 100% but fairly sure. I think post-tensioning strands for something that size would normally be in about two or three bunches of strands each in a circular pattern on a flange (whereas pre-tensioning I think the wires are tensioned against a metal plate that is part of the form, that the beam is removed from once the tension in the strands is released). As for why they’re still there I suppose they just leave the strands in and tie them into the rest of the reinforcement?
Thanks very much for this extra information, especially the points about tensioning. This certainly makes more sense to me now.
@@stephengentle2815 they are prestressed. Strand extends into the in situ support (yet to be cast)
Thanks so much for these informative vids Paul, however is it possible next if you could check the Pitt St station as you haven't made any vids as such.
Yes, Pitt Street has already been filmed. Victoria Cross will be published next, then Pitt Street and then Crows Nest.
Thanks Paul.....another informative video...thanks for the tip re viewing from High St...will check it out when I’m next in Sydney...Cheers!
You're very welcome Terence.
Thanks Paul for the update
You're very welcome.
and you know what? this vid is the best info i've seen on the station. and i've looked ; ) apart from the nice looking entrance pic. a little glass box with a nice wood roof
Hi Mark, yes information on Barangaroo (and many of the other Sydney Metro stations is sketchy!). I feel I'm doing my bit to plug the gaps with these videos!
i think the rectangular box you asked about earlier is for escalators. it doesn't seem to be wide enough for anything else
Yes that would make sense Mark.
Good one Paul!👍
Thanks 👍
I worked in that building behind you a few times before and during the foreshore upgrade. Massive changes. I have some photos if you'd like them.
That's cool. Yes it would be good to see the photos. You can send them to paul@transportvlog.com. Cheers Paul
That was really interesting Paul, thanks for posting. Do you know whether the red steel girders at the top are temporary or part of the permanent structure?
The red girders are a temporary steel structure to support Hickson road. They were installed prior to the station excavation. When you drive on Hickson road, the station excavation is directly underneath you. It will be removed after the station is complete.
Great question Michael, I was thinking the same thing myself when editing this video. However, judging by the comment below, it looks like they are temporary.
Thanks! - I'll keep a lookout for them being removed.
Thanks for the video Paul hope someone with knowledge of the site helps you out. New walkway looks great and getting plenty of visitors.
At10:30 workers walking under suspended load. Poor WH&S practice on a major work site. Sad to see workers doing so.
Glad you enjoyed it Peter. I didn't notice that! I wonder if WH&S people watch my videos!
those workers are directly involved in the lift and are looking up at it. avoiding having to walk under might have been difficult. from the perspective of us viewers it seemed more dangerous than it was. i have done some of this sort of work.
Paul. All these new underground railway stations, I think would have to have, emergency fire escape staircases, that would need to be fire proof, and separate from the rest of the structure. In Bangaroo's case its been centrally placed.
i think that's actually just access to the site
Good point Phillip. I now remember that being the case when I worked on the Jubilee Line Extension in London.
Yes that's probably right Mark.
The link between Tallawong and St Mary's is most important. This missing link should be built asap. As it will provide for a second link to Penrith. This link is vital to reduce the congestion on the western train line for commuters.
that won't be started before the airport line is done
Yes, I believe this is a little way in the future.
because it pre-cast concrete there are joints and particular care needs to be taken into account in how the reinforcement bar interlocks with the rest of the structure.
Yes that makes sense. You could see how carefully they were working. Not leaving anything to chance!
How long will it take to build that station?
It should be completed during 2023, so in plenty of time for the metro line opening in 2024.
@ 5.08 that shaft is probably fire stairs escape route !
Yes could be. Escalators could be another possibility
8:27 Peri Up 👍
What are super T beams?
They are the beams that will support the roof. You can see one being put into position towards the end of this video.