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Alaskan Way Viaduct Replacement Tunnel

Started by jakeroot, April 21, 2014, 06:29:22 PM

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Bruce

An aerial shot that was posted by a random Twitter user.



Bickendan

Quick! Someone film a sequel to Speed and jump an articulated trolley bus!!!
(It's Hollywood; they'll handwave it)

Sub-Urbanite

By god it does look like a totally different city

jakeroot

Great photos from WSDOT from the ground...the changes are especially noticeable down there:

https://twitter.com/ChrisDaniels5/status/1128837268284760064

rte66man

So where are they disposing of all that steel?  I'm assuming the concrete is being crushed and recycled.
When you come to a fork in the road... TAKE IT.

                                                               -Yogi Berra

jakeroot

Quote from: rte66man on May 22, 2019, 09:05:02 PM
So where are they disposing of all that steel?  I'm assuming the concrete is being crushed and recycled.

Concrete is going to fill the closed Battery Street Tunnel. Not sure about the steel.

https://twitter.com/Q13FOX/status/1129062934775291904

Beltway

Quote from: jakeroot on May 22, 2019, 09:34:56 PM
Quote from: rte66man on May 22, 2019, 09:05:02 PM
So where are they disposing of all that steel?  I'm assuming the concrete is being crushed and recycled.
Concrete is going to fill the closed Battery Street Tunnel. Not sure about the steel.

That looks like aggregate base material.  Filling the whole invert with concrete would be super-expensive.  Earthen fill could handle most of the backfilling necessary.
http://www.roadstothefuture.com
http://www.capital-beltway.com

Baloney is a reserved word on the Internet
    (Robert Coté, 2002)

MNHighwayMan

Quote from: Beltway on May 22, 2019, 09:58:32 PM
That looks like aggregate base material.  Filling the whole invert with concrete would be super-expensive.  Earthen fill could handle most of the backfilling necessary.

They're filling the tunnel with the rubble concrete from the viaduct.

Beltway

Quote from: MNHighwayMan on May 22, 2019, 10:41:53 PM
Quote from: Beltway on May 22, 2019, 09:58:32 PM
That looks like aggregate base material.  Filling the whole invert with concrete would be super-expensive.  Earthen fill could handle most of the backfilling necessary.
They're filling the tunnel with the rubble concrete from the viaduct.

Oh OK ... rubblized concrete would look somewhat like aggregate base material.

That is putting it to good use!
http://www.roadstothefuture.com
http://www.capital-beltway.com

Baloney is a reserved word on the Internet
    (Robert Coté, 2002)

Alps

Quote from: MNHighwayMan on May 22, 2019, 10:41:53 PM
Quote from: Beltway on May 22, 2019, 09:58:32 PM
That looks like aggregate base material.  Filling the whole invert with concrete would be super-expensive.  Earthen fill could handle most of the backfilling necessary.

They're filling the tunnel with the rubble concrete from the viaduct.
And then earth to complete the fill, I imagine.

Beltway

Quote from: Alps on May 22, 2019, 11:49:50 PM
Quote from: MNHighwayMan on May 22, 2019, 10:41:53 PM
Quote from: Beltway on May 22, 2019, 09:58:32 PM
That looks like aggregate base material.  Filling the whole invert with concrete would be super-expensive.  Earthen fill could handle most of the backfilling necessary.
They're filling the tunnel with the rubble concrete from the viaduct.
And then earth to complete the fill, I imagine.

Probably, depending on how much concrete there is in the viaduct.
http://www.roadstothefuture.com
http://www.capital-beltway.com

Baloney is a reserved word on the Internet
    (Robert Coté, 2002)

jakeroot

Here's an image from WSDOT's website:


Beltway

4,000 Ready Mix truck loads of concrete?  Wow... that will be expensive. 

About 10 cubic yards in the average size truck.

That is the equivalent amount ... they are going to set up a central mix plant on the site and produce the concrete there.
http://www.roadstothefuture.com
http://www.capital-beltway.com

Baloney is a reserved word on the Internet
    (Robert Coté, 2002)

jakeroot

I don't know if setting up shop on site would be more or less expensive than trucking in all the cellular concrete. Based on the density of the area, and the number of affected businesses and homes, they're probably just going for the one that is least noisy or disruptive.

Beltway

#764
Quote from: jakeroot on May 23, 2019, 12:06:14 PM
I don't know if setting up shop on site would be more or less expensive than trucking in all the cellular concrete. Based on the density of the area, and the number of affected businesses and homes, they're probably just going for the one that is least noisy or disruptive.

If the equivalent of 4,000 Ready Mix trucks of concrete is needed in a specific location, several blocks of street in this case, the central mix plant will be considerably less expensive per cubic yard of concrete, assuming that there is enough space to set it up, which of course would be temporary.

There are several different types --
https://www.vincehagan.com/central-mix-concrete-batch-plants/
http://www.roadstothefuture.com
http://www.capital-beltway.com

Baloney is a reserved word on the Internet
    (Robert Coté, 2002)

jakeroot

Quote from: Beltway on May 23, 2019, 01:55:20 PM
Quote from: jakeroot on May 23, 2019, 12:06:14 PM
I don't know if setting up shop on site would be more or less expensive than trucking in all the cellular concrete. Based on the density of the area, and the number of affected businesses and homes, they're probably just going for the one that is least noisy or disruptive.

If the equivalent of 4,000 Ready Mix trucks of concrete is needed in a specific location, several blocks of street in this case, the central mix plant will be considerably less expensive per cubic yard of concrete, assuming that there is enough space to set it up, which of course would be temporary.

There are several different types --
https://www.vincehagan.com/central-mix-concrete-batch-plants/

Cool, thanks for the link. Sounds like a win-win for everyone. Assuming the mixing process isn't incredibly noisy. Though even then, I doubt it could be any louder than the noise produced by the traffic in the old tunnel, coming up through the vents.

Beltway

Quote from: jakeroot on May 23, 2019, 02:16:32 PM
Cool, thanks for the link. Sounds like a win-win for everyone. Assuming the mixing process isn't incredibly noisy. Though even then, I doubt it could be any louder than the noise produced by the traffic in the old tunnel, coming up through the vents.

Cellular concrete as about 1/3 the density of structural concrete, but the production is still fairly similar.

http://www.cellularconcreteinc.com/

Cellular Concrete is a low-density fill material primarily used in geotechnical applications.  The Lightweight Cellular Concrete is made by the injection (or blending) of a pre-formed stable foam into a cement-based slurry.
http://www.roadstothefuture.com
http://www.capital-beltway.com

Baloney is a reserved word on the Internet
    (Robert Coté, 2002)

The Ghostbuster

Now we have to see how well the new tunnel will hold up when Seattle has its next earthquake. Since they can't be predicted, we might be in for a very long wait.

jakeroot

Quote from: The Ghostbuster on May 23, 2019, 03:24:09 PM
Now we have to see how well the new tunnel will hold up when Seattle has its next earthquake. Since they can't be predicted, we might be in for a very long wait.

The tunnel was designed to move with the dirt around it. I don't understand all the engineering, but it's probably going to be the safest place to be in an earthquake. Since the ground is what's moving, being inside the ground should be optimal.

Bruce

Quote from: jakeroot on May 23, 2019, 06:16:57 PM
Quote from: The Ghostbuster on May 23, 2019, 03:24:09 PM
Now we have to see how well the new tunnel will hold up when Seattle has its next earthquake. Since they can't be predicted, we might be in for a very long wait.

The tunnel was designed to move with the dirt around it. I don't understand all the engineering, but it's probably going to be the safest place to be in an earthquake. Since the ground is what's moving, being inside the ground should be optimal.

Most of the danger from earthquakes comes from other structures falling onto you. Being in a tunnel helps minimize that, compared to say Pioneer Square (where most of the buildings have tons of brick masonry that will come crashing down).

nexus73

Quote from: The Ghostbuster on May 23, 2019, 03:24:09 PM
Now we have to see how well the new tunnel will hold up when Seattle has its next earthquake. Since they can't be predicted, we might be in for a sudden strike at any time.

FIFY.  It has been 319 years and counting since the last one.  Might want to check intervals between Cascadia Subduction Zone quakes before playing the "long time to go" card.  For those of us in the PNW, we are playing a game of You Bet Your Life, no matter whether you are aware of the hazard or just an ostrich.

Rick
US 101 is THE backbone of the Pacific coast from Bandon OR to Willits CA.  Industry, tourism and local traffic would be gone or severely crippled without it being in functioning condition in BOTH states.

Bruce

Demolition timelapse from a Western Avenue office building:


Bickendan

Amazing how the removal of an icon like that improves everything.

Bruce

Tolling is delayed until fall due to missed deadlines from the tolling vendor.

https://twitter.com/GrahamKIRO7/status/1138885158042423296

jakeroot

Quote from: Bruce on June 12, 2019, 03:24:26 PM
Tolling is delayed until fall due to missed deadlines from the tolling vendor.

Dammit. The congestion is getting worse, so I was looking forward to a toll, to get some relief.



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