Fire under bridge causes bridge to collaspe northbound completely . Southbound bridge maybe as well. Erily similar to 2017 collaspe of I-85 in Atlanta but maybe worse.
Similar to what happened some years ago just west of Harrisburg, PA where US322 met I-81. It was some months before the damage could be fixed and normal traffic pattern resumed. Since Philly is a more dense area the effects are probably worse.
Feature that if the dedicated railroad MofW personnel of half a century ago were given the job and equipment they will need - they would have the roadway open in both directions by July 1, 2023.
Considering how important I-95 is to East Coast commerce I expect the repairs will be done pretty quickly. Not overnight of course but I wouldn’t be surprised if the timeline is similar to the Atlanta I-85 bridge repair.
Either governor activates the 337th Engineer Battalion in Reading (PA Army Guard) or Biden federalizs them. They errect a Mabey-Johnson (Mabey Logistics Support) Bridge and traffic is riolling from 24 to 48 hours later "The Mabey Logistic Support Bridge (in the United States, the Mabey-Johnson Bridge) is a portable pre-fabricatedtruss bridge, designed for use by military engineering units to upgrade routes for heavier traffic, replace civilian bridges damaged by enemy action or floods etc., replace assault and general support bridges and to provide a long span floating bridge capability.
It is amazing how well SEPTA has adapted to this closing. SEPTA has published on its web site a revised timetable including new services. It was published Sunday and revised today. Anyone know if it has distributed this revision? Now Amtrak shows no ability to publish a timetable at all.
If they build a temporary bridge, they still have to tare it down to build the permanent bridge, so the highway will still be out of service for 6 weeks or more. As soon as debris are cleared they can start building the piers/abutments ahead of the span.
What I would do is dress and repair the abutment structure as the existing structure is broken up and removed, and install the temporary bridge to open the road to traffic. I would make this temporary bridge in parallel sections, perhaps no more than a couple of lanes wide.
Then build falsework aligned with the abutments and fabricate the structure of the permanent structure on this, alongside the highway. When all that work is complete, the adjacent section of the temporary bridge is taken down and the new structure moved incrementally sideways while the ‘rest’ of the temporary lanes remain open. Only the last movement requires all traffic on the road to be held, as long as it takes to grind or fill the approach pavement for the new spans.
Temporary bridge not needed. They are going to fill in the exit ramp thereby making a temporary roadway. Then one lane at a time install bridge beams back on original walls. When all done remove temporary bridge fill thereby able to reopen exit ramp.
Hardest part will be able to get fill to site because of the traffic jams. Just close a inbound and outbound lane to all other traffic. IMO probably be complete in 14 - 18 days.
At 21;45 appears some kind of concrete pumping system. They are also used for the extra strength concrete systems. Maybe needing some reinforcing of the wall base? When project complete the engineering report will be interesting reading.
Recycled glass beads agregate weight of styrofoam! What a great concept! Maybe finally we will be able to recycle glass again. As well glass color will not be a problem hopefully! 23 states have approved for road projects.
EDIT: 22:20 the demo continues with the north wall supporting the northbound lanes is being removed. Guess concrete compromised? That is unexpected.