EGB273 EXAM 2025 QUESTIONS WITH 100%
CORRECT ANSWERS!!/NEWEST UPDATE
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Terms in this set (45)
• Support imposed loads
• Prevent settlement (including differential
settlement)
• Prevent possible movement of structure due to
periodic shrinkage and swelling of subsoil
What are the functions of
• Allow building over water or water-logged ground
foundation for a building
• Resist uplift or overturning forces due to wind
structure?
• Resist lateral forces due to soil movement
• Underpin (support) existing or unstable structures
• Transmit the load further into the ground to
counteract the moment which will occur due to any
horizontal loads
, • High level / Shallow Types of Foundation
• Low level / Piled Strip footing, Pad (or Spread)
footing, Raft (or Mat) footing, Strapped (or
Combined) footing
Shallow:
• Shallow foundations take their name from the level
How many types of
they are founded
foundation and what are
• Typically lighter load than deep (piled) foundation
their performances?
• Much cheaper to construct
• No specialist equipment needed
Deep:
Transferring foundations to a convenient level; a
firm soil stratum with sufficient load carrying
capacity
• Pad foundation - Used for relatively light loads or
excellent ground conditions such as high level rock
(Not suitable for varying ground conditions)
What are the shallow • Strip footing - Used under walls or where there is a
foundation types? line of closely spaced columns
• Raft (or Mat) footing - Used where ground
conditions are reasonably good but variation is
apparent across the site
Sketch the pressure -
distribution for the pad
foundation below subject
to uniformly distributed
load
, Pile foundations transfer the load of a structure to
denser bedrock deeper than a shallow foundation
similar to a pillar in a building.
Displacement (Driven Piles):
• Timber
What are the functions,
• Precast concrete (sometimes prestressed)
types and characteristics
• Closed ended steel tube
of pile foundation?
• Steel "H" sections
Cast in Place:
• Bulb piles
• Bored piers
• Grouted piles
End bearing piles
What types of piles resist
Friction bearing piles
vertical loads?
Combination
Drill out the hole with the auger
Steel casing added as a temporary support
Use drilling fluid to remove mud from borehole
Understand how cast in Add reinforced cage
place piles are installed, Fill with cement
their advantage and If there is water can fill from the bottom and the
disadvantages. water is displaced to the top, at the end the top part
of concrete then needs to be removed as it has
been contaminated by the water and need to refill
this part.
CFA Continuous Flight Auger.
Continuous Flight Auger (CFA) Piling is the quietest
form of piling and is a fast and very economical
What is a CFA pile?
technique. It is a cast in-situ process, very suited to
soft ground where deep casings or use of drilling
support fluids might otherwise be needed.
CORRECT ANSWERS!!/NEWEST UPDATE
Save
Terms in this set (45)
• Support imposed loads
• Prevent settlement (including differential
settlement)
• Prevent possible movement of structure due to
periodic shrinkage and swelling of subsoil
What are the functions of
• Allow building over water or water-logged ground
foundation for a building
• Resist uplift or overturning forces due to wind
structure?
• Resist lateral forces due to soil movement
• Underpin (support) existing or unstable structures
• Transmit the load further into the ground to
counteract the moment which will occur due to any
horizontal loads
, • High level / Shallow Types of Foundation
• Low level / Piled Strip footing, Pad (or Spread)
footing, Raft (or Mat) footing, Strapped (or
Combined) footing
Shallow:
• Shallow foundations take their name from the level
How many types of
they are founded
foundation and what are
• Typically lighter load than deep (piled) foundation
their performances?
• Much cheaper to construct
• No specialist equipment needed
Deep:
Transferring foundations to a convenient level; a
firm soil stratum with sufficient load carrying
capacity
• Pad foundation - Used for relatively light loads or
excellent ground conditions such as high level rock
(Not suitable for varying ground conditions)
What are the shallow • Strip footing - Used under walls or where there is a
foundation types? line of closely spaced columns
• Raft (or Mat) footing - Used where ground
conditions are reasonably good but variation is
apparent across the site
Sketch the pressure -
distribution for the pad
foundation below subject
to uniformly distributed
load
, Pile foundations transfer the load of a structure to
denser bedrock deeper than a shallow foundation
similar to a pillar in a building.
Displacement (Driven Piles):
• Timber
What are the functions,
• Precast concrete (sometimes prestressed)
types and characteristics
• Closed ended steel tube
of pile foundation?
• Steel "H" sections
Cast in Place:
• Bulb piles
• Bored piers
• Grouted piles
End bearing piles
What types of piles resist
Friction bearing piles
vertical loads?
Combination
Drill out the hole with the auger
Steel casing added as a temporary support
Use drilling fluid to remove mud from borehole
Understand how cast in Add reinforced cage
place piles are installed, Fill with cement
their advantage and If there is water can fill from the bottom and the
disadvantages. water is displaced to the top, at the end the top part
of concrete then needs to be removed as it has
been contaminated by the water and need to refill
this part.
CFA Continuous Flight Auger.
Continuous Flight Auger (CFA) Piling is the quietest
form of piling and is a fast and very economical
What is a CFA pile?
technique. It is a cast in-situ process, very suited to
soft ground where deep casings or use of drilling
support fluids might otherwise be needed.
