GalileoG
Structural
- Feb 17, 2007
- 467
I have a one-storey steel structure (no basement) founded on pile caps with deep foundations. The ground floor slab was designed as a suspended slab with grade beams. Roof over a portion of the building will be demolished and a new roof constructed at a higher elevation. This new construction will be entirely supported by new columns.
The new columns will need to be supported on pile caps and deep foundations, similar to the existing condition. However, given space constraints, we can only use micropiles/helical piers and will therefore need to keep the new foundation loads to a minimum. The existing structural slab will need to be cut just enough to allow for construction of new pile cap.
Is there any way I can avoid load transfer between the existing slab and the new pile caps? Would like to keep the ground floor load 100% on the existing foundations. Any ideas/suggestions? I imagine if there is a way, it will involve reinforcing the “opening” and adding micropiles to support the edge.
The new columns will need to be supported on pile caps and deep foundations, similar to the existing condition. However, given space constraints, we can only use micropiles/helical piers and will therefore need to keep the new foundation loads to a minimum. The existing structural slab will need to be cut just enough to allow for construction of new pile cap.
Is there any way I can avoid load transfer between the existing slab and the new pile caps? Would like to keep the ground floor load 100% on the existing foundations. Any ideas/suggestions? I imagine if there is a way, it will involve reinforcing the “opening” and adding micropiles to support the edge.
