Design Of Shallow Bridge Foundation 271a
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Bridge Foundation Part of bridge, which s superstructure and pier/abutment of bridge and transmits total bridge loads to soil
Foundation Type
Bridge Foundation
Shallow Foundation Deep Foundation 1
Shallow Foundation
Normally shallow foundation is provided when soil strata is good in upper layer and depth of foundation does not exceed 6m (average).
Spread Footing
Shallow Foundation
Shallow/Open Foundation
Isolated Footing Combined Footing Mat Foundation
Deep Foundation Normally deep foundation is provided when soil strata is not good in upper layer and depth of foundation exceeds 6m (average) .
Deep Foundation
Pile Foundation
Well/Caisson Foundation
Well Foundation Foundation with well
Pile Foundation Foundation with piles
Bridge Foundation
Design of Shallow Foundation
Isolated Footing
P
Behaviour of isolated footing under loads
Tends to bend like a cantilever slab in both direction
M
Column Isolated Footing
Two Way Shear
Tends to slide along the shear plane
One Way Shear
Reinforcement of Isolated Footing
B
B
B Elevation
Bottom arrangement of reinforcing bars (For square and rectangular footing)
Reinforcement of Isolated Footing
Isolated footing with shear reinforcement Top arrangement of reinforcing bars (For square and rectangular footing)
Shear reinforcement
Spread Foundation
Behaviour of spread foundation under loads
P M
Wall Spread Footing
Tends to bend like a cantilever slab
Tends to slide along the shear plane One Way Shear
Reinforcement of Spread Foundation
Elevation
Bottom arrangement of reinforcing bars
Reinforcement of Spread Footing
Foundation with shear reinforcement Top arrangement of reinforcing bars
Shear reinforcement
Combined Footing M1
P1
M2
Behaviour of combined footing under loads
P2
d + side of column
d + side of column
SF Dia
BM Dia
Footing acts as a longitudinal beam in longitudinal direction
BM Dia
Footing acts as a transverse beam in transverse direction
Reinforcement of Combined Footing
≥B
≥B
Bottom arrangement of bars
B
Top arrangement of bars ≥ Development length
≥ Development length
Raft Foundation
P1
M1
P2
M2
d
Strip
Behaviour of raft foundation under loads
SF Dia
Part of Footing (strip) along longitudinal and transverse direction acts as like a beam
BM Dia
Foundation Type
Bridge Foundation
Shallow Foundation Deep Foundation 1
Shallow Foundation
Normally shallow foundation is provided when soil strata is good in upper layer and depth of foundation does not exceed 6m (average).
Spread Footing
Shallow Foundation
Shallow/Open Foundation
Isolated Footing Combined Footing Mat Foundation
Deep Foundation Normally deep foundation is provided when soil strata is not good in upper layer and depth of foundation exceeds 6m (average) .
Deep Foundation
Pile Foundation
Well/Caisson Foundation
Well Foundation Foundation with well
Pile Foundation Foundation with piles
Bridge Foundation
Design of Shallow Foundation
Isolated Footing
P
Behaviour of isolated footing under loads
Tends to bend like a cantilever slab in both direction
M
Column Isolated Footing
Two Way Shear
Tends to slide along the shear plane
One Way Shear
Reinforcement of Isolated Footing
B
B
B Elevation
Bottom arrangement of reinforcing bars (For square and rectangular footing)
Reinforcement of Isolated Footing
Isolated footing with shear reinforcement Top arrangement of reinforcing bars (For square and rectangular footing)
Shear reinforcement
Spread Foundation
Behaviour of spread foundation under loads
P M
Wall Spread Footing
Tends to bend like a cantilever slab
Tends to slide along the shear plane One Way Shear
Reinforcement of Spread Foundation
Elevation
Bottom arrangement of reinforcing bars
Reinforcement of Spread Footing
Foundation with shear reinforcement Top arrangement of reinforcing bars
Shear reinforcement
Combined Footing M1
P1
M2
Behaviour of combined footing under loads
P2
d + side of column
d + side of column
SF Dia
BM Dia
Footing acts as a longitudinal beam in longitudinal direction
BM Dia
Footing acts as a transverse beam in transverse direction
Reinforcement of Combined Footing
≥B
≥B
Bottom arrangement of bars
B
Top arrangement of bars ≥ Development length
≥ Development length
Raft Foundation
P1
M1
P2
M2
d
Strip
Behaviour of raft foundation under loads
SF Dia
Part of Footing (strip) along longitudinal and transverse direction acts as like a beam
BM Dia
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