JNTUK R20 3-1 Geotechnical Engineering-1 Material
UNIT-1
Introduction: Soil formation – soil structure and clay mineralogy – Adsorbed water – Mass- volume relationship –Relative density
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Index Properties of Soils: Grain size analysis – Sieve and Hydrometer methods – consistency limits and indices – Various Types of soil Classifications – Unified soil classification and I.S. Soil classification.
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UNIT-2
Permeability: Soil water – capillary rise – One dimensioned flow of water through soils – Darcy’s law- permeability – Factors affecting –laboratory determination of coefficient of permeability – Permeability of layered systems.
Geostatic Stresses: Total, neutral and effective stresses –quick sand condition
Seepage:2-D flow and Laplace’s equation – Seepage through soils –Flow nets: Characteristics and Uses.
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UNIT-3
Stress Distribution In Soils: Stresses induced by applied loads – Boussinesq’s and Westergaard’s theories for point loads and areas of different shapes– Newmark’s influence chart – 2:1 stress distribution method.
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UNIT-4
Compaction: Mechanism of compaction – factors affecting – effects of compaction on soil properties – compaction control.
Consolidation: Compressibility of soils – e-p and e-log p curves – Stress history – Concept of consolidation – Spring Analogy – Terzaghi’s theory of one-dimensional Consolidation – Time rate of consolidation and degree of consolidation – Determination of coefficient of consolidation (cv) – Over consolidated and normally consolidated clays.
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UNIT-5
Shear Strength of Soils: Basic mechanism of shear strength -Mohr – Coulomb Failure theories – Stress-Strain behavior of Sands – Critical Void Ratio – Stress-Strain behavior of clays – Shear Strength determination- various drainage conditions.
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