Pile supported slab on ground
Pile supported slab on ground
(OP)
Hello everyone,
I am working on a project where we have this large pile supported slab (200' x 300') with a design load of 400psf (heavy racking).
The slab will be 14" deep with 4" drop panels around the pile caps.
Does anyone has any advice on what to do to prevent cracking on this slab?
We plan to use a square pattern for the pouring of the slab with keyed construction joints. Would you stop the reinforcement at these joints? How long would you wait between the pourings?
Apart from those joints, there will be no other joint.
Any advice?
Thanks a lot
Chris Laroche, P. Eng
I am working on a project where we have this large pile supported slab (200' x 300') with a design load of 400psf (heavy racking).
The slab will be 14" deep with 4" drop panels around the pile caps.
Does anyone has any advice on what to do to prevent cracking on this slab?
We plan to use a square pattern for the pouring of the slab with keyed construction joints. Would you stop the reinforcement at these joints? How long would you wait between the pourings?
Apart from those joints, there will be no other joint.
Any advice?
Thanks a lot
Chris Laroche, P. Eng





RE: Pile supported slab on ground
I would prepare the construction joints well and use expanded metal formwork to give additional bond. I think it is best to make the reinforcing steel continuous through the joints.
RE: Pile supported slab on ground
There's economy to be gained by designing reinforcing cut-off points and staggering the bars... Say 3000 span then the bot bars would be approx 3000*.8*2, centred over the support lines.
Dik
RE: Pile supported slab on ground
The pile spacing is somewhere between 5,5m and 6m.
We chose that large spacing because the piles have to be very long (12 - 15m).
Does it change your opinion?
Chris
RE: Pile supported slab on ground
Dik