Trains.com

Mexico city elevated subway line 12 structure falls

662 views
6 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    December 2007
  • From: Georgia USA SW of Atlanta
  • 10,248 posts
Mexico city elevated subway line 12 structure falls
Posted by blue streak 1 on Tuesday, May 4, 2021 9:11 AM
  • Member since
    December 2007
  • From: Georgia USA SW of Atlanta
  • 10,248 posts
Posted by blue streak 1 on Tuesday, May 4, 2021 9:24 AM

Anyone have a guess of the weight  of the structure and weight of cars ?  That would give us an estimate of failure analysis ?

  • Member since
    March 2016
  • From: Burbank IL (near Clearing)
  • 12,391 posts
Posted by CSSHEGEWISCH on Tuesday, May 4, 2021 9:57 AM

You would also have to consider the strains involved from the 2017 earthquake.

The daily commute is part of everyday life but I get two rides a day out of it. Paul
  • Member since
    December 2007
  • From: Georgia USA SW of Atlanta
  • 10,248 posts
Posted by blue streak 1 on Tuesday, May 4, 2021 12:01 PM

CSSHEGEWISCH

You would also have to consider the strains involved from the 2017 earthquake. 

Absolutely:  Have to wonder if Mexico City brought in some expert persons to examine their overhead viaducts.  Thinking about the persons who examined the viaducts after the San Francisco earthquake.

  • Member since
    May 2003
  • From: US
  • 20,543 posts
Posted by BaltACD on Tuesday, May 4, 2021 5:53 PM

blue streak 1
 
CSSHEGEWISCH

You would also have to consider the strains involved from the 2017 earthquake.  

Absolutely:  Have to wonder if Mexico City brought in some expert persons to examine their overhead viaducts.  Thinking about the persons who examined the viaducts after the San Francisco earthquake.

According to the 6 PM news - that line is the newest that has be constructed in the Mexico City system.  When it was actually constructed was not stated.

  • Member since
    December 2007
  • From: Georgia USA SW of Atlanta
  • 10,248 posts
Posted by blue streak 1 on Tuesday, May 4, 2021 10:16 PM

Here is an engineering forum link that has a bunch of clear pictres of locations near the accident.  An anaysis of the pictures notes multiple welds on spans and some comment  about quality.

Mexico City subway overpass collapses, killing at least 23 and injuring dozens - Engineering Failures & Disasters - Eng-Tips

  • Member since
    September 2008
  • 1,094 posts
Posted by aegrotatio on Sunday, May 9, 2021 6:42 PM

Scuttlebutt says corrupción during construction and even more corrupción tainted the inspections after the 2017 earthquake.

This was the same subway that was notable for its tight curves harming ride quality and also damaging the railroad.

https://www.manufacturing.net/safety/news/21415806/mexico-city-subway-collapse-was-a-tragedy-foretold

 

Join our Community!

Our community is FREE to join. To participate you must either login or register for an account.

Search the Community

Newsletter Sign-Up

By signing up you may also receive occasional reader surveys and special offers from Trains magazine.Please view our privacy policy