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Fundamentals of Geotechnical Foundation Design: Types, Criteria, and Capacity

This educational resource by Dr. M. Zoghi, Ph.D., P.E., introduces the essential concepts of geotechnical foundation design. It covers the types of foundations, including shallow (spread and mat footings) and deep foundations (pile and drilled piers), while emphasizing critical design criteria such as settlement and bearing capacity. The material also discusses the mechanisms of bearing capacity failure, including general and local shear failures, as well as the impact of groundwater on foundation performance. An invaluable guide for engineers and students alike.

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Fundamentals of Geotechnical Foundation Design: Types, Criteria, and Capacity

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  1. PART IFOUNDATIONS – INTRODUCTORY CONCEPTS M. Zoghi, Ph.D., P.E. Geotechnical Design Fall 2008

  2. OUTLINE • Introduction • Types of Foundation • Design Criteria • Bearing Capacity • GWT http://www.eng.fsu.edu/~tawfiq/ceg4111/ShallowFoundation.html

  3. I. Introduction • In general – “Foundation: that which supports something.” • Athletic Foundation – supports the school’s sports program. • Structural Foundation – that which supports a structure. • Soil-Structure Interaction

  4. II. Types of Foundation • Shallow Foundations • Spread footings • Combined footings • Mat foundations • Deep Foundations • Pile foundations • Drilled piers

  5. Shallow Foundations

  6. Deep Foundations

  7. Deep Foundation: Drilled Pier

  8. III. Design Criteria • Settlement • Bearing Capacity

  9. Failure Mechanism General Shear Failure I. Elastic Zone; II. Radial Shear Zones; III. Rankine Passive Zones

  10. Local Shear Failure

  11. IV. Bearing Pressure – Bearing Capacity

  12. Terzaghi’s Bearing Capacity Equations qult = Cohesion Term + Surcharge Term + Width Term

  13. V. Groundwater Effects

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