Melbourne Metro Rail Project Revived

 
Topic moved from News by bevans on 16 Feb 2015 17:54
  3088D Station Staff

There's a subway line in central Berlin that has taken almost two decades to build a few km worth, because Berlin sits on a large amount of swampy land and it's essentially tunneling through soup that collapses back in on itself.  Plus the government insisted that one of the stations be building directly under the river, which has caused all sorts of problems - basically the groundwater has to be kept frozen so they can keep building.
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The first two castles sank into the swamp. The third one stayed up...

What they've done in Berlin sounds similar to what has been done in New York for the East Side Access project, where engineers had to freeze the soil. Some details can be seen here.

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  Adogs Chief Train Controller

There's a subway line in central Berlin that has taken almost two decades to build a few km worth, because Berlin sits on a large amount of swampy land and it's essentially tunneling through soup that collapses back in on itself.  Plus the government insisted that one of the stations be building directly under the river, which has caused all sorts of problems - basically the groundwater has to be kept frozen so they can keep building.

The first two castles sank into the swamp. The third one stayed up...

What they've done in Berlin sounds similar to what has been done in New York for the East Side Access project, where engineers had to freeze the soil. Some details can be seen here.
3088D

You mean the Stadtschloss (City Castle/Palace)?  That is directly adjacent to the Museumsinsel station I was referring to.  It was damaged in WW2 then demolished by the Communists afterwards, but has now almost been rebuilt.  I believe it's reopening next year.

There are a lot of interesting construction stories from Berlin to do with the unstable ground.
  ngarner Assistant Commissioner

Location: Seville
Metro Tunnels latest newsletter (first one for almost a year) says that TBM Meg has been launched towards South Kensington but there's nothing anywhere else that I've seen to confirm that.

Newsletter

Neil
ngarner
The newsletter must have been written in anticipation of a launch as the latest news on the web site indicates that Meg will be launched "soon" although the timeline allows for anytime up to mid/late November.

TBM

Neil  
  simstrain Chief Commissioner

Certainly some interesting comments and hearsay in the Twitter thread.  Sounds like structural steel contaminated with lead paint is an issue:


From February:
https://www.theage.com.au/national/victoria/workers-exposed-to-highly-toxic-lead-on-major-victorian-projects-20190212-p50x7k.html
Carnot


The worst thing you can do is cancel a project once it has been started. If it goes over budget then so be it but if you cancel it then you end up with no infrastrucuture or a half built piece of infrastrucutre that can make things worse. So keep building and ignore the people who keep bringing up these numbers as in the end you will end up with a much needed piece of infrastrucuture that will more then make up for any over run in cost.
  True Believers Chief Commissioner

The worst thing you can do is cancel a project once it has been started. If it goes over budget then so be it but if you cancel it then you end up with no infrastrucuture or a half built piece of infrastrucutre that can make things worse. So keep building and ignore the people who keep bringing up these numbers as in the end you will end up with a much needed piece of infrastrucuture that will more then make up for any over run in cost.
simstrain
Yup like how we wasted money on the Doncaster rail tunnel connection to the Clifton hill group to the Eastern Freeway median that got to fill in straight after. Pretty sad that project started construction and got cancelled just like that.
  ngarner Assistant Commissioner

Location: Seville
Well, Meg the TBM is a