GITAM University Geotechnical Engineering I Syllabus
Soil properties- Origin and formation of soils; Three Phase Representation of Soil Mass, Physical properties of Soil –
Void ratio, Porosity, Degree of Saturation, Water content, Unit Weights, Specific Gravity – their functional
relationships, Relative density .
Consistency limits – Determination and various indices – Plasticity index, Consistency Index, Liquidity index –
Significance and Importance, Activity Ratio
Classification : Mechanical analysis – Sieve analysis, Stoke’s law, hydrometer Analysis, I.S and MIT Grain Size
Classification, Indian Standard Classification for fine grained and coarse grained soils for general engineering purposes.
Soil Hydraulics – Types of soil water, Darcy’s law and its limitations, Determination of Coefficient of permeability,
Laboratory methods-constant head and variable head permeameter tests, Factors influencing coefficient of permeability,
permeability of stratified soils. Stress Principle for Saturated Soils-Total, neutral and effective stresses, No flow,
downward flow and upward flow conditions, quick sand conditions, critical hydraulic gradient.
Stress distribution : Boussinesq’s theory for the determination of vertical stresses due to point loads, assumptions and
validity, extension to rectangular and circular loaded areas,
2 : 1 approximate method, Westergaard’s theory, Newmark’s influence chart – Construction and use, Contact pressure
distribution beneath rigid footings, founded on cohesive & cohesion less soils.
Consolidation: Oedometer Tests, e-p and e-log p curves – compression index, coefficient of compressibility and
coefficient of volume change. Terzaghi’s assumptions for one dimensional consolidation, equation and application,
coefficient of consolidation, degree of consolidation Vs time, curve fitting methods, initial compression, primary
compression and secondary compression, determination of pre-consolidation pressure by casagrande’s method.
Normally consolidated, over consolidated and under consolidated clayey deposits.
Compaction: Mechanism of compaction, Factors affecting compaction, British Standard, Modified AASHO and IS
compaction tests. Effect of compaction on physical and engineering properties of soils, Field compaction Equipment
and Quality Control, Proctor’s Penetrometer.
Subsoil Exploration: Methods of subsoil exploration Direct, methods, Soundings by Standard, Dynamic cone and
static cone penetration tests, Types of Boring, Types of samples, Criteria for undisturbed samples, Transport and
preservation of samples, Bore-logs, planning of exploration programs, Report writing.
1. Gopala Ranjan and A.S.R. Rao., Basic and Applied Soil Mechanics, New age international Publishers.
2. V.N.S. Murthy, Soil Mechanics, Foundation Engineering, UBS Publishers, distribution Ltd.
3. K.R. Arora, Soil Mechanics and Foundation Engineering, Standard Publishers, New Delhi.
4. Swami Saran, Analysis and Design of Substructures (limit state), Oxford & IBH Publications Pvt Ltd, New Delhi (New edition-Taylor & Francis Ltd Publishers).
5. Donald P. Coduto, Geotechnical Engineering, Prentice-Hall India Publications.
6. B.C.Punmia, Soil Mechanics and Foundations, (SI Units) Laxmi Publications, New Delhi.