[HN Gopher] Watch a highway bridge be replaced in under three da...
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Watch a highway bridge be replaced in under three days, live
Author : gumby
Score : 49 points
Date : 2022-04-22 13:35 UTC (9 hours ago)
(HTM) web link (verandaplan.org)
(TXT) w3m dump (verandaplan.org)
| bombcar wrote:
| The "build it nearby and move it into position" has become all
| the rage lately, it's been proven multiple times and has
| advantages, even with longer spans like the St Croix Crossing.
|
| Another one in China: https://www.youtube.com/watch?v=cKi8VWRDA_c
| throwaway0a5e wrote:
| As a Masshole I cringe at all the opportunities for make-work
| handouts and "not quite graft" this kind of efficiency forgoes.
| Those backwards hicks up there would be so much better off if
| they did things our way. We really know how to run a state. They
| need to think bigger. That simple bridge replacement, it should
| take a year. It should tie up hundreds and hundreds of orange
| barrels. There will need to be rental equipment parked on site
| for at least six months. If the local communities are rich, you
| gotta make sure they tie you up in court over the minutia so you
| can spend thousands on politically connected law firms. Triple
| the timeline if you're within 5mi of a wetland. Etc. etc.
|
| (sarcasm should be obvious)
| navbaker wrote:
| I lived on Oahu for several years and am still blown away by
| the time and cost expenditures for the monorail system that
| will (in 2031) connect the west side of the island with the
| mall in Honolulu. Construction started in 2011 and the first
| phase, which only goes about half of the total distance, won't
| open until late this year!
| mrguyorama wrote:
| This is literally within walking distance of me and I have a
| friend who is working on this project.
|
| Sure the actual replacement only takes 3 days, but it's been
| worked towards with construction on the area and the roads
| underneath for something like a year. It's a very affluent area,
| and an absolutely vital corridor into and out of the city for
| employees, because affording living close to the city is
| laughably difficult.
|
| The common joke here in Maine is that there are two seasons:
| Winter, and construction.
| barbazoo wrote:
| What was wrong with the old bridge? Not that I know anything
| about bridges but it looks newish.
| bombcar wrote:
| Look at the abutments on the west camera - the new bridge is
| obviously wider.
|
| I suspect they're adding a lane in each direction.
|
| Ah I was wrong (or not completely right, the new bridge is
| wider but adds shoulders):
|
| > Problem: The Veranda Street Bridge carries Interstate 295
| (I-295) over Veranda Street (U.S. Route 1) in Portland,
| Maine. The existing bridge was built in 1961 and, after 60
| years of heavy use, its condition has deteriorated. A 2017
| inspection of the bridge determined it's in satisfactory to
| poor condition and is structurally deficient.
|
| https://verandaplan.org/project
| [deleted]
| mrguyorama wrote:
| Same problem with nearly every bridge in the US: It's really
| old and past its design life and should have been replaced
| ten years ago.
| [deleted]
| seizethegdgap wrote:
| That is a very common joke in Wisconsin as well, which leads me
| to believe anywhere north of the 37th parallel has the same
| joke.
| mrosett wrote:
| Salt Lake just did this for one of the bridges across I-80.
| Amazingly the actual swap took less than 24 hours.
| Maximus9000 wrote:
| Here is a similar project with a time lapse video in Ottawa,
| Canada
|
| https://www.youtube.com/watch?v=zDcMMPuk3Dw
| bombcar wrote:
| Pretty ingenious to shove dirt under the old bridge to make
| demolition easier.
| shortstuffsushi wrote:
| It feels like this should be titled something more to the effect
| of, "watch a bridge section be constructed on site and then
| installed over the span of a year." Noting it as "replaced in
| three days" feels wildly inaccurate.
| rich_sasha wrote:
| Time on site seems like a massively critical time variable,
| especially with infrastructure people want to use, e.g. a
| road/highway. Time off site is presumably much cheaper,
| certainly less disruptive.
|
| The title feels informative to me.
| shortstuffsushi wrote:
| I'm not sure what you mean about time on site, could you
| explain? They've been building this section of bridge "on
| site" by my understanding of the phrase, and have had the
| road way under the bridge diverted by construction for the
| past year. It appears to have been permanently redirected
| now. I assume during some of the work to the existing bridge,
| they've had traffic slowed, diverted, barreled, etc. Actual
| moving of old section out and new section into place in three
| days seems to pretend this was a speedy project with only
| minor disruption to local traffic, which doesn't seem quite
| right to me. I guess if the thought is just that that highway
| connected to the bridge is only (fully) closed for three
| days, that's certainly worth something over having it closed
| for the year it took to do the project.
| bombcar wrote:
| According to the FAQ https://verandaplan.org/faq the road
| under the bridge is closed for 7 days (already closed) and
| the highway is closed for 3.
|
| All in all that's a pretty low amount of time; often these
| are done by closing the road under for an unspecified
| amount of time, diverting all traffic onto one bridge span
| (reduce to one lane in each direction) and replacing the
| bridge a half at a time.
| rich_sasha wrote:
| I misunderstood; you're right, but as sibling comment says,
| short time to close down the affected roads completely
| matters.
| ozim wrote:
| So Usain Bolt can win gold medal in Olympics under 10
| seconds totally disregarding all training he spent time
| on.
|
| So all that matters is people watching it on TV?
|
| I disagree much, because building site was there for
| months and road below was hindered all the time. Highway
| was maybe operating without closing lanes but that is not
| the full story there.
| pwr-electronics wrote:
| Riveting
| exabrial wrote:
| just beam-ing with excitement
| anonu wrote:
| Was expecting a time lapse. Not a live view.
| daveaiello wrote:
| There is a time lapse, but it's a link on the landing page.
| ryannevius wrote:
| Welded to my seat.
| titzer wrote:
| It's incredible the money and logistical thinking devoted to
| highway construction and maintenance compared to almost any other
| kind of infrastructure in America. Like, imagine they decided
| trains were as high a priority.
| blamazon wrote:
| They did, it's just privately owned, maintained, and operated
| by freight companies. [1]
|
| [1] https://www.researchgate.net/figure/The-North-American-
| Rail-...
| titzer wrote:
| The rail networks in the US are actually dwindling [1], from
| a peak of ~250,000 route miles in the 1920s to less than
| 100,000 today. The USDOT maintains over 4 million miles of
| highway.
|
| [1] https://www.railserve.com/stats_records/railroad_route_mi
| les...
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