
TYPES OF FOUNDATIONS
- Shallow Strip Edge Beams - For Light Loaded Buildings
- Pad - To Support Internal Columns of Buildings
- Raft - To keep Movements to a tolerable.
- Deep Driven Piles - Significant depth to competent.
- Bored Piles - Large Capacity Required.
What is RAFT FOUNDATION ?
- A Foundation System in which essentially the entire building is placed on a large continuous footing.
- Usually large concrete slab supporting many columns.
- Commonly used as foundation for silos, chimneys, large machinery.
- It is a flat concrete slab, heavily reinforced with steel, which carries the downward loads of the individual columns or walls.
TO DESIGN RAFT FOUNDATIONS
- Determine the capacity of the foundation.
- Determine the settlement of foundation.
- Determine the differential settlement.
- Determine the stress distribution beneath the foundation.
- Design the structural component of the mat foundation using the stress distribution obtain from 4.
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