Adelaide's Premier Development and Construction Site
https://sensational-adelaide.com/forum/
Well that goes without saying, access will certainly be required along multiple points, some more major than others but the entire length should be a tunnel.
I'm just saying that we need to start at least thinking about it. Both a non-stop N-S road and a CBD rail tunnel have been pipe dreams for decades now. Only one has had any serious work put into it. The rail tunnel will be about half the length of the South Rd tunnel(s) and significantly narrower. It's great that the final pieces of the puzzle for South Road are being planned, but we need to invest as much time and energy into proper public transport projects if we want to have more than just an extra station or two added to our heavy or light rail in the next 10 years. Start planning the options now, to commence work in 5-10 years, so it will be complete in 10-15.Nort wrote: ↑Sun Feb 10, 2019 10:05 pmI'm a big fan of the idea of a CBD rail tunnel, but apart from containing the word tunnel they are entirely different projects with entirely different purposes.
To be honest a South Road tunnel is probably the best thing that could happen in building momentum for a rail tunnel. It would get us the equipment and expertise needed locally to make the project happen and coming as it would with the "completion" of South Road it would be the perfect timing for large public transport infrastructure works.
And on that note, a single tunnel will not allow for access via Cross Road to the SE Freeway, as is one of the preferred eventual options from IA. Large expected increases in road freight over the coming decades will render the Portrush road route unviable in the long term, and sooner or later the Cross road upgrade will commence. Any tunnel plans should include provisions for an interchange in the Cross road area.mattwinter wrote: ↑Mon Feb 11, 2019 9:19 amIs that diagram implying there won't be an upgrade to the Cross Road / South Road intersection? Would be a great shame - desperately needs an upgrade which includes grade seperation of the train line
Your comments about Cross Road are merely an assumption, nowhere does it state that this is the preferred route for road freight. By that point we could probably expect the Libs to have built their road freight bypass, which is probably why it's not a point of consideration in any tunnel proposal.claybro wrote: ↑Mon Feb 11, 2019 11:39 amAnd on that note, a single tunnel will not allow for access via Cross Road to the SE Freeway, as is one of the preferred eventual options from IA. Large expected increases in road freight over the coming decades will render the Portrush road route unviable in the long term, and sooner or later the Cross road upgrade will commence. Any tunnel plans should include provisions for an interchange in the Cross road area.mattwinter wrote: ↑Mon Feb 11, 2019 9:19 amIs that diagram implying there won't be an upgrade to the Cross Road / South Road intersection? Would be a great shame - desperately needs an upgrade which includes grade seperation of the train line
I think that would be dealt with by a tunnel entrance/exit at Anzac highway.
How deep would a tunnel need to be to be allowed to not be concerned with surface infrastructure and permissions?Patrick_27 wrote: ↑Mon Feb 11, 2019 12:00 pmYour comments about Cross Road are merely an assumption, nowhere does it state that this is the preferred route for road freight. By that point we could probably expect the Libs to have built their road freight bypass, which is probably why it's not a point of consideration in any tunnel proposal.claybro wrote: ↑Mon Feb 11, 2019 11:39 amAnd on that note, a single tunnel will not allow for access via Cross Road to the SE Freeway, as is one of the preferred eventual options from IA. Large expected increases in road freight over the coming decades will render the Portrush road route unviable in the long term, and sooner or later the Cross road upgrade will commence. Any tunnel plans should include provisions for an interchange in the Cross road area.mattwinter wrote: ↑Mon Feb 11, 2019 9:19 amIs that diagram implying there won't be an upgrade to the Cross Road / South Road intersection? Would be a great shame - desperately needs an upgrade which includes grade seperation of the train line
The decline for the Carrapateena mine east of Woomera seems to be expected to take about 3 years (November 2016 to late 2019) for a 7.5km tunnel. That has no issues with neighbours complaining about dust, noise or blasting. I don't know how wide or high that is compared to a freeway, nor whether a mine decline in rock is comparable to digging a horizontal tunnel in the Adelaide Plains.how good is he wrote: ↑Mon Feb 11, 2019 2:14 pmIf they did this as two separate projects ie 2 x 5 - 6 km tunnels, how long would a 5-6 km tunnel take to build? Are my thoughts of 2 years realistic? I know it's unlikely but if a magical $5bn appeared by the end 2021?
No not just an assumption. I have seen it mentioned numerous times in various publications. Regardless of the Liberal proposal for and Eastern Freightlink, it will be necessary to connect the North south motorway to the SE freeway due to the amount of warehousing and industry in the Western suburbs, and this has already been covered by IA.Patrick_27 wrote: ↑Mon Feb 11, 2019 12:00 pmYour comments about Cross Road are merely an assumption, nowhere does it state that this is the preferred route for road freight. By that point we could probably expect the Libs to have built their road freight bypass, which is probably why it's not a point of consideration in any tunnel proposal.claybro wrote: ↑Mon Feb 11, 2019 11:39 amAnd on that note, a single tunnel will not allow for access via Cross Road to the SE Freeway, as is one of the preferred eventual options from IA. Large expected increases in road freight over the coming decades will render the Portrush road route unviable in the long term, and sooner or later the Cross road upgrade will commence. Any tunnel plans should include provisions for an interchange in the Cross road area.mattwinter wrote: ↑Mon Feb 11, 2019 9:19 amIs that diagram implying there won't be an upgrade to the Cross Road / South Road intersection? Would be a great shame - desperately needs an upgrade which includes grade seperation of the train line
Well I am no expert however if Seattle can do it we certainly can. And from this link even 1 tunnel, down at 60+ metres and it can go right under the city.how good is he wrote: ↑Mon Feb 11, 2019 2:14 pmIf they did this as two separate projects ie 2 x 5 - 6 km tunnels, how long would a 5-6 km tunnel take to build? Are my thoughts of 2 years realistic? I know it's unlikely but if a magical $5bn appeared by the end 2021?
TBMs are generally built to work in the specific jobs geology. What works here might be useless anywhere else, and what works on South road might be useless for Cross road.normh wrote: ↑Mon Feb 11, 2019 5:11 pmWell I am no expert however if Seattle can do it we certainly can. And from this link even 1 tunnel, down at 60+ metres and it can go right under the city.how good is he wrote: ↑Mon Feb 11, 2019 2:14 pmIf they did this as two separate projects ie 2 x 5 - 6 km tunnels, how long would a 5-6 km tunnel take to build? Are my thoughts of 2 years realistic? I know it's unlikely but if a magical $5bn appeared by the end 2021?
https://newatlas.com/worlds-largest-dri ... tha/28311/
They say in the article 10m a day, 3 lanes in over/under configuration so we are looking at say 3 to 5 years, pretty good I reckon.
So hey why not, while we are at it, a tunnel from the bottom of the freeway, under the Cross Road/Portrush Road intersection to the North South Motorway with a feed both North and South and that could happen at the Anzac Highway intersection. Once the TBM is bought and is working might was well leverage it, and to speed things up buy 2. Once the machines are here, surely they could be used for projects interstate to offset the capital costs and spread the love