shallow foundations 3

shallow foundations 3 - Shallow Foundations 3 Foundation...

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Shallow Foundations 3 Foundation Design CE 482
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Overview Foundations transfer the weight (load) of the structure to underlying soils Properly designed foundation does not overstress the soil Overstressing may cause: Shear failure Excessive settlement Both can cause damage
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Foundation Types a) spread footing b) mat foundation c) pile foundation d) drilled caisson
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Types of Foundations Shallow Foundations (D:B < 4) Spread Footing: An enlargement of a load-bearing wall or column to reduce soil stress to acceptable levels Mat Foundation: Spread footing covering the entire building footprint Deep Foundations (D:B >4) Pile and Caisson: End-bearing: transfers load to bearing at tip Friction: load carried shear stresses along shaft
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Shallow Foundations Ultimate soil bearing capacity (limit equilibrium condition) General shear failure (dense soil) Local shear failure (loose soil)
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Shallow Foundations
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This note was uploaded on 10/07/2009 for the course CE 482 at USC.

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shallow foundations 3 - Shallow Foundations 3 Foundation...

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