JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• 1. To impart knowledge required for computing stress and settlement at any point in the semi- infinite elastic soil medium, anisotropic medium and layered deposits due to foundation loads.
• 2. To evaluate the stability of foundations, slopes, cuts and retaining structures both for the conditions of undrained and drained loading through theorems of plastic collapses. Course OUTCOME: At the completion of the course, the students will be able to
• 1. Decide the type of mathematical models to be used for analyzing the behavior of soil mass at critical state
• 2. Understand the elastic and plastic behavior of soils under various loads.
• 3. Analyze and evaluate stress deformation behavior for various loads and subsoil conditions.

UNIT - I

Theory of Elasticity: Basic concepts, definitions and notations of stress & strain components – Generalized Hooke’s Law, Equilibrium and Compatible conditions in Cartesian, Polar coordinates – Principal stresses and strains

UNIT - II

Theory of Plasticity: Ideal Plastic substance strain hardening – yield criteria – Tresca, & Van Mises, Mohr & Coulomb, Drucker-Prager theories, Critical State Soil Mechanics, – applications to soil mechanics problems.

UNIT - III

Stresses and Displacements due to Surface and Subsurface Loads – Boussinesq, Cerutti, Mindlin Solutions, Stresses and Displacements in Finite Layer & Multi-Layered Systems. Stress-path methods; Rotation of Foundations.

UNIT - IV

Critical state & constructive behavior of soils – introduction to yield criteria, constructive modeling.

UNIT - V

Underground Structures: Stresses and Displacements around Underground Openings unlined and lined tunnels.

REFERENCES:

• 1. Poulos, H. G. & Davis, E. H. – “Elastic Solutions for Soil and Rock Mechanics, John Wiley and Sons, New York, 1974
• 2. Das, B. M. - Principles of Foundation Engineering 5th Edition Nelson Engineering (2004)
• 3. Harr,M.E. – “Foundations of Theoretical Soil Mechanics” Mc Graw-Hill, 1966.
• 4. Atkinson J. H. - An Introduction to the Mechanics of Soils and Foundation - through critical state soil mechanics, McGraw- Hill Co. (1993)
• 5. Wood, D.M.- Soil Behavior and Critical State Soil Mechanics. cambridge university press (1991) R19 M.TECH GEOTECHNICAL ENGG. M.TECH.- I YEAR- I SEMESTER GEOTECHNICAL ENGINEERING