AARoads Forum

Regional Boards => Mid-South => Topic started by: longhorn on April 16, 2021, 02:11:25 PM

Title: How is bridge demolition done?
Post by: longhorn on April 16, 2021, 02:11:25 PM
https://twitter.com/i/status/1382792924312739843

Curious how did they get deck to pancake like that? Minor explosives on the supports? Yet traffic is flowing on the other side.
Title: Re: How is bridge demolition done?
Post by: bwana39 on April 16, 2021, 05:24:52 PM
My guess is the jackhammer on the boom of the excavator finally made the final cut to release the tension. 
Title: Re: How is bridge demolition done?
Post by: The Ghostbuster on April 16, 2021, 09:39:30 PM
I suppose using dynamite would be too dangerous and too messy.
Title: Re: How is bridge demolition done?
Post by: abqtraveler on April 17, 2021, 08:08:35 PM
Quote from: bwana39 on April 16, 2021, 05:24:52 PM
My guess is the jackhammer on the boom of the excavator finally made the final cut to release the tension.

Just weaken the support columns enough and the bridge will collapse under its own weight.