M4 CONCEPTS Flashcards
The lowest part of a structure that transmits its weight to the underlying soil or rock.
Foundations
Two major categories of Foundations
- Shallow foundations
- Deep foundations
Foundation Category
Individual footings, square or rectangular in plan, that support columns and strip footings that support walls and other similar structures
Shallow foundations
Foundation Category
Piles and drilled shafts that transmit the load of the structure to a greater depth.
Deep foundations
Shallow Foundations
How did Terzaghi defined shallow foundations?
Depth is less than or equal to the width of the foundation
Types of Failure in Soil at Ultimate Load:
Shear Failure that occurs with Dense Sand or Stiff Cohesive Soil
General Shear Failure
Types of Failure in Soil at Ultimate Load:
Shear Failure that occurs with Medium Dense Sand or Medium Stiff Cohesive Soil
Local Shear Failure
Types of Failure in Soil at Ultimate Load:
Shear Failure that occurs with Loose Soil
Punching Shear Failure
the working bearing pressure that would ensure a margin of safety against collapse of the foundation from soil shear failure
Allowable Bearing Capacity or Safe Bearing Capacity
the ratio of the ultimate bearing capacity to the allowable bearing capacity or to the applied maximum vertical stress
Factor of Safety