How bridge foundations are laid in waterways.
I HAVE ALWAYS WONDERED.
This answers so many questions
NO FUCKING WAY
Alright I did a Google and this thing is called a
Do what you will with that information.
Okay but how did they get to that point? I still have questions
I would assume they slowly lower into the water to displace it, but other than a guess I have no idea
Usually a coffer dam is placed into a body of water and then the inside is pumped out… The aim is to grant access to the river bed after all. Often the Coffer dam will have to be sunk several dozen feet (several metres) into the riverbed.
Reblogged from CJMoseley.tumblr.com. I do not claim to be the copyright holder, or to ensure links are maintained…