The foundation carries the entire weight of a building safely into the ground. For high-rise buildings on the soft, alluvial soils common in Bangladesh, foundation design is especially critical.
Shallow vs deep foundations
Low-rise structures on firm soil may use shallow foundations such as isolated or raft footings. Tall buildings usually require deep foundations that transfer load to stronger strata below.
Common deep foundation types
- Bored cast-in-situ piles
- Driven pre-cast piles
- Pile-supported raft (piled raft) systems
The role of soil investigation
No foundation can be designed safely without knowing the soil. A proper subsoil investigation reveals bearing capacity, water table and settlement behaviour.
Designing for settlement and earthquakes
Engineers must control differential settlement and design for seismic loads, which are significant in Bangladesh.
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