Shallow Foundations Shallow Foundations versus Deep FoundationsShallow Foundations versus Deep Foundations
Shallow Foundations Usually the more economical optionUsually the more economical option As a general rule, consider deep foundations only when shallow foundations do not give satisfactory designAs a general rule, consider deep foundations only when shallow foundations do not give satisfactory design Types of Shallow foundationsTypes of Shallow foundations Spread footings (square, circular, rectangular)Spread footings (square, circular, rectangular) Combined FootingsCombined Footings Continuous FootingsContinuous Footings Mat or Raft FoundationsMat or Raft Foundations
Computation of Bearing Pressure Column Load (Ex 5.1) Wall Load (Ex 5.2)
Net Bearing Pressure Net Bearing Pressure (q´) Floating Foundation –When q´ = 0 –Example: Student Center Building at MIT Estimated without floatation settlement = 1.0ft and settlement with partial floatation was 2-3 inches
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