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That pic is looking down on one of the destroyed piers
Imagine looking at this pier from above... http://forums.pelicanparts.com/uploa...1711584033.jpg |
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I wonder how frequently these ships experience loss of power/steerage..
This ship had three tugs assisting it, but required three more tugs to bring it under control https://nypost.com/2024/04/07/us-news/massive-container-ship-loses-power-near-nycs-verrazzano-bridge-days-after-baltimore-key-bridge-disaster/ |
Good question on loss of propulsion frequency. What would’ve happened if there was not an extra three tugs or the three tugs did not make it in time?
I see the ship left for Charleston SC after repairs. Note to self, stay off bridges for the next few days! |
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Seems like a tremendous way to destroy infrastructure is to disable the control of a large ship just before it passes under a bridge. |
I forgot to mention, the Verrazzano has a robust protection system around the towers.. basically tons of riprap around the tower base/pier caps..
Though I wonder if even that is enough...The impact energy of a 100,000 ton ship going 8 knots hitting an object at 90 deg is like a really big hard to comprehend number |
Expanding on why this will not be an easy fix...
A few other structures were mentioned that were put back in service "ahead of time" LA, Philly, and Atlanta? were mentioned.. those are all small simple span bridges.. Access is easy, you can drive right up with 10 wheelers and loaders and start removal of the rubble... Its easy to erect new steel, easy to support the structure while it being built.. This is cribbing and a jacking frame being built so this structure (and approach ramp to the GW bridge) Highbridge in the background.. can be jacked up and the old rocker bearings removed, and new MR bearings installed.. http://forums.pelicanparts.com/uploa...1712529129.jpg And simply scale.. The span of they Key bridge is, just guessing 3, 500 foot spans to be replaced, and a portion of one of the approaches that was also damaged.. I would imagine they are going to use the remaining approaches to build from.. In these pics are deck panels for the 59th St bridge.. a few months production http://forums.pelicanparts.com/uploa...1712529655.jpg http://forums.pelicanparts.com/uploa...1712529655.jpg Con't |
A lot goes on behind the curtain.. that guy is mag particle testing welds on a section cut from a sacrificial deck panel.. And if you think that beam looks curved, it is...the beams are rolled and camber is put into the beam/panel.. so when it is in place its flat with no preload...
http://forums.pelicanparts.com/uploa...1712530332.jpg We all love tools... bad ass table saw http://forums.pelicanparts.com/uploa...1712530403.jpg This is a pic from one of the first jobs where I was a chief.. superstructure steel.. Willy B .. replacement of outer roadway floor beams and deck, demolition and replacement of existing approaches.. and a full repaint.. http://forums.pelicanparts.com/uploa...1712530595.jpg We had 6 Manitowoc crawlers, that big barge mounted crane... a gantry to deliver the panels.. The pic is crappy on the main span much of the outer roadway is already removed... on the nearest span you see... lead remediation is taking place prior to demo.. and the near tower is surrounded by a scaffold system.. waiting for the negative pressure containment system.. All while maintaining pedestrian, train, auto and ship traffic.. |
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Thank you for the pictures and information, Tim. Keep it coming!
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Great info, Tim. Thanks!
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so... nearly a month later.
https://www.cbsnews.com/baltimore/news/salvage-recovery-key-bridge-collapse-baltimore-one-month/ I wonder what design work is underway to replace the bridge and what that timeline could look like. I get that they are still cleaning up but I dont understand why design and procurement couldn't be a parallel path to cleanup (hopefully they are). There are 3 temporary channels open now and it sounds like the latest one may be able to support some cargo ship traffic. Is this big enough? I have no idea. The new temporary path, with a controlling depth of 20 feet (6.1 meters), a horizontal clearance of 300 feet (91.4 meters) and a vertical clearance of 135 feet (41.2 meters), allows a greater variety of vessels to access the port while crews work to reopen the main channel, Coast Guard and port Capt. David O’Connell said in a news release. https://toronto.citynews.ca/2024/04/20/third-temporary-channel-opens-for-vessels-to-baltimore-port-after-bridge-collapse/ |
I guess the temporary channels are not deep enough for most cargo ships which draw 40 - 50'...
http://forums.pelicanparts.com/uploa...1713995623.jpg I dont know if 135' of vertical clearance is sufficient. |
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Thanks for that ^^^
200 ton crane claw... ever play the grapple game in the entrance to the Applebees? http://forums.pelicanparts.com/uploa...1714000875.jpg |
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dayum. definitely not good choices for duck hunting and crabbing. |
I was headed over the Ravanel bridge today from Charleston, to Mount Pleasant, and I saw a cargo ship approaching. It was escorted by two tugs. I don’t know if that’s standard protocol or something new.
I was also surprised at how fast it approached the bridge. I wanted to get across ASAP. Just in case… http://forums.pelicanparts.com/uploa...1714095803.jpg http://forums.pelicanparts.com/uploa...1714095803.jpg |
https://www.cbsnews.com/baltimore/news/first-container-ship-arrives-at-port-of-baltimore-since-key-bridge-collapse-another-milestone/
First container ship has arrived in the port since the bridge collapse… |
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My guess… they remove the Dali in the next couple days.
https://www.cbsnews.com/baltimore/news/dali-ship-to-be-removed-from-key-bridge-wreckage-by-early-may-45-foot-channel-to-open/ |
I wonder if they will leave the original bridge moorings in place and build a new bridge using them. Would definitely be the fastest cheapest way to go.
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I guess they recovered another of the deceased the other day. Still one person unaccounted for.
Also predicting 2028 before the bridge reopens… I’m sure it could be done quicker if the red tape was cut and the resources made available. How long would it take to do this project in China? |
Crazy photos released from the deck of the Dali. Hard to believe that thing is still sorta afloat.
Looks like they're going to demo the bridge sitting on it using charges so it all comes apart at once, to avoid something moving if they removed it by section. Less hazard to the salvors. |
Proposed new bridge....looks great.
https://www.yahoo.com/finance/news/webuild-proposes-design-baltimore-francis-083109074.html https://s.yimg.com/ny/api/res/1.2/6t...d6e9d14b1a2f41 |
^^^That seems to be the standard design for big bridges these days.
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I was just about to post on the Webuild/Lane proposal.. Webuild is an Italian consortium of companies, one of which is Lane...
The proposal is a design/build for the replacement.. which basically means plans are being developed as construction progresses...I was wondering if the existing approaches would be reused... in the rendering it appear no.. Design/builds are funny as the QA/QC is all by the constructor... meaning, the builder hires the "3rd party inspection service" Kind of fox guarding the henhouse.. Quote:
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that's pretty amazing stuff right there. one heck of a job for the guys who placed those charges.
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I was somehow expecting to see the bow raise in those videos. It must be really stuck on the river bottom. Hopefully they can free it in the coming days.
Lots of international press about the crew being 'stuck' on the ship for 2 months... I imagine there are several reasons for this including not wanting to lose first hand witnesses. |
^^ The internet shipping guy says there is not much buoyancy in the bow, and there's still a four-lane highway draped across it.
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