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Elv13

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Messages posté(e)s par Elv13

  1. Le 2023-05-30 à 18:58, SameGuy a dit :

    REM is a (brand of) metro. I think you mean “a train.” 130 km between cities needs a standard intercity train, not a metro.

    Not by that much. The planned one-line in Seattle/Tacoma/Everett is ~102km. Some S-bahn lines in Germany are about 90km. I agree it's the wrong type of train (an ICE would be ideal), but it's not that much of a stretch to use a REM with elevated crossings, even to Gatineau/Ottawa.

     

    The economy of scale kicks in and having them fully integrated in the Opus helps the logistics.

  2. Il y a 23 heures, KOOL a dit :

    Je suis curieux, c'est où à San Francisco ? Certainement à quelques minutes à pied du centre-ville comme Griffintown. 

    Je vis a San-Francisco en ce moment. Cette image est l’équivalent de Villeray. C'est pas centrale et ca date d'apres l'age d'or des triplex. Ceci dit, c'est assez commun d'avoir des fils electrique comme ca meme dans les quartier beaucoup plus historique. A vancouver aussi. Construire quoi que ce soit a San-Francisco est vraiment difficile et il y a beaucoup de paperasse. Voici le resultat.

    • Thanks 1
  3. Il y a 8 heures, Doctor D a dit :

    WTF? What is that for? No foundations but a hole for elevators? Can someone enlighten me?

    If you look at the previous picture, it's bedrock. So they don't need a foundation. Foundations are dug in Canada/Quebec to get below the the ground which freezes. It has to be because freeze/thaw cycle would crack the walls after a few years. But that only applies to actual soil. Here, the bedrock wont move much, if at all. So a simple slab is enough. Primary schools don't all have a basement. Mine didn't (built in brutalist style from in the 60's). When they built a condo block next to it, I can confirm the bedrock was like 2 feets from the surface. Same as this site. They used dynamite and it was pretty cool for a 7 years old to see this from the edges of the playground.

     

    I suggest this video:

     

    • Thanks 3
  4. Il y a 4 heures, acpnc a dit :

    À ne pas confondre avec Place Bonaventure, le plus gros bunker de Montréal qui n'a même pas besoin d'être sous terre pour être pleinement efficace. En ces temps de bruit de guerre c'est à considérer :veryhappy:

    Works pretty well actually

    1*wx2K3Ojp1vZAT4ITUP-OsQ.jpeg

    https://en.wikipedia.org/wiki/Flak_tower

     

    There has been many attempts to destroy these things over the years. Most still stand because they ran out of budget trying to bring them down after the war. Place Bonaventure contains *a lot* of concrete too. The outer walls don't have enough to survive an indirect nuke stroke, but the superstructure has. I am not super certain about the foundations. It's built on pillars on top of rail lines. It goes to bedrock (because it sits near the surface on that site), but I don't know how strong the base slab is.

    • Haha 1
  5. This is a logistic choice. The site that would otherwise be totally surrounded if not for the access road to the bottom of the hole. For the tallest tower, they need the most raw material. So having this access road really allows them to bring material without a traffic jam and to store many days of material on site. It's a win-win really.

     

    If they had built the from facing buildings first, they would leave the site fully surrounded and many it logistically challenging to build the tower.

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