CE2305 FOUNDATION ENGINEERING Lecture Notes for CIVIL - Fifth (5th) semester
CE2305 Lecture Notes
Scope and objectives – Methods of exploration-auguring and boring – Water boring and rotatory
drilling – Depth of boring – Spacing of bore hole - Sampling – Representative and undisturbed
sampling – sampling techniques – Split spoon sampler, Thin tube sampler, Stationary piston
sampler – Bore log report – Penetration tests (SPT and SCPT) – Data interpretation (Strength
parameters and Liquefaction potential) – Selection of foundation based on soil condition.
UNIT II SHALLOW FOUNDATION
Introduction – Location and depth of foundation – codal provisions – bearing capacity of shallow
foundation on homogeneous deposits – Terzaghi’s formula and BIS formula – factors affecting
bearing capacity – problems - Bearing Capacity from insitu tests (SPT, SCPT and plate load) –
Allowable bearing pressure, Settlement – Components of settlement – Determination of
settlement of foundations on granular and clay deposits – Allowable settlements – Codal
provision – Methods of minimising settlement, differential settlement.
UNIT III FOOTINGS AND RAFTS
Types of foundation – Contact pressure distribution below footings and raft - Isolated and
combined footings – Types and proportioning - Mat foundation– Types, applications uses and
proportioning-- floating foundation.
UNIT IV PILES
Types of piles and their function – Factors influencing the selection of pile – Carrying capacity of
single pile in granular and cohesive soil - Static formula - dynamic formulae (Engineering news
and Hiley’s) – Capacity from insitu tests (SPT and SCPT) – Negative skin friction – uplift
capacity – Group capacity by different methods (Feld’s rule, Converse Labarra formula and
block failure criterion) – Settlement of pile groups – Interpretation of pile load test – Forces on
pile caps – under reamed piles – Capacity under compression and uplift.
UNIT V RETAINING WALLS
Plastic equilibrium in soils – active and passive states – Rankine’s theory – cohesionless and
cohesive soil - Coloumb’s wedge theory – condition for critical failure plane - Earth pressure on
retaining walls of simple configurations – Graphical methods (Rebhann and Culmann) -
pressure on the wall due to line load – Stability of retaining walls.