lecture - on foundation 1 - yavuz yardim on foundation by ... bs 8004: code of practice ... steel...
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4/19/2017
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LECTURE ON
FOUNDATION
By
Dr. Yavuz YARDIMDept. of Civil Engineering
20 January 2010
Foundation
Pad
Footing
Combined
Footing
Raft
Footing
Wall / strip
Footing
Pile
Foundation
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Concrete
Steel
Timber
Hard strata
3m
Pile foundation consists of two parts
•Pile
•Pile cap
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�Raft footing is an inverted flat slab (column at top & slab at bottom)
When choose raft footing?
�For large combined footing
�When column is very close
�When soil bearing capacity for each column is different
�For large load on weak type of soil
�Large differential settlement
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Design Foundation
Related to soil(soil bearing
capacity)
Related to structure
�Depends on soil property
�Depends on profile of soil
�Depends on load
�Depends on water table inside the ground
�Depends on cost
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�Raft footing is an inverted flat slab (column at top & slab at bottom)
When choose raft footing?
�For large combined footing
�When column is very close
�When soil bearing capacity for each column is different
�For large load on weak type of soil
�Large differential settlement
� Foundations transfer loads from
the structure or building or
individual columns to the earth
� Type of foundation to be used
depends on a number of factors
� Soil properties & condition
� Type of structure & loadings
� Permissible amount of different
settlement
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Why Pile foundations-
� When a solid bearing stratum is deeper than about 3m below the base level of the
structure a foundation supported on bearing piles will provide an economical
solution
BS 8004: Code of practice for foundation
Concrete
Steel
Timber
Hard strata
3m
Pile foundation consists of two parts
•Pile
•Pile cap
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