air pressure inside bored piles

[kkr90]

hi,
I have seen that during placing of concreting using tremie in bored pile they are placing a air pipe or vent pipe in the hopper to allow the flow of air and i had also seen many times air coming out from the pipe,my doubt is how air struck inside the pile when it is full of bentonite solution ......

 

[Ron]

The tremie process puts air into the system at the interface with the bentonite slurry. It introduces air in "gulps" and has to "burp".

 

[kkr90]

wat is the 'gulps'

 

[Ron]

Take a drink of water....swallow large amounts several times in a row and see the result...