Difference Between Shallow and Deep Foundation | What Is Foundation | Types of Foundation

What Is Foundation?

Types of Foundation

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Shallow Foundation

  • Individual Footing
  • Combined Footing
  • Strip Foundation
  • Raft or Mat Foundation
  • Spread Footing Foundations,
  • Slab-On-Grade Foundations,
  • Pad Foundations,
  • Rubble Trench Foundations
  • Earthbag Foundations
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Deep Foundation

  • Pile Foundations
  • Caissons Foundations
  • Cylinders Foundations
  • Basements Foundations
  • Hollow Box Foundations (Buoyancy Rafts)
  • Shaft Foundations
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Shallow Foundation Definition

Deep Foundation Definition

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How Deep Are Foundations?

Difference Between Shallow and Deep Foundation

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Sr. No.DetailShallow FoundationDeep Foundation
1MeaningShallow means having little depth.Deep means extending far away from a point of reference, especially downwards.Extending far down from the top or surface
2DefinitionFoundation which is placed near the surface of the earth or transfers the loads at shallow depth is called the shallow foundation.Foundation which is placed at a greater depth or transfers the loads to deep strata is called the deep foundation.
3CostA shallow foundation is cheaper.Deep foundations are generally more expensive than shallow foundations.
4Types of FoundationsShallow foundations include strip footing, isolated footings, combined footings, mat foundations, and grade beams.Deep foundations include pile caps, piles, drilled piers, and caissons.
5Depth of the FoundationShallow foundations can be made in depths of as little as 3ftΒ (1m)Deep foundations can be made at depths of 60 - 200ft (20 - 65m).
6Shape of FootingA shallow foundation is a rectangular or square shape.A deep foundation is a bit circular and cylindrical shape.
7FeasibilityShallow foundations are easier to construct.A deep foundation is more complex.
8Mechanism of Load TransferShallow foundations transfer loads mostly by end bearing.Deep foundations rely both on end bearing and skin friction, with few exceptions like end-bearing pile.
9AdvantagesConstruction materials are available, less labour is needed, construction procedure is simple at an affordable cost, etc.Deep foundation can be provided at a greater depth, Provide lateral support and resist uplift, effective when foundation at shallow depth is not possible, can carry a huge load, etc.
10DisadvantagesPossibility of a settlement, usually applicable for lightweight structure, weak against lateral loads, etc.More expensive needs skilled labours, complex construction procedures, can be time-consuming and some types of deep foundations are not very flexible, etc.
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Shallow Foundation Depth

Types of Deep Foundations

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