JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives

To understand the physical and mechanical properties of soil and its behavior

under external loads.

Course Outcomes

Students should be able to understand the soil behaviour under external loads,

and procedures to measure relevant soil parameters.

UNIT - I

Introduction & Geostatic Stresses: Classification of Soils, Consistency Limits, Stresses within a soil mass, Effective Stress principle, Geostatic stresses.

UNIT - II

Flow through Soils: Permeability, seepage – Finite difference formulae for steady state and transient flows – flow nets – computation of seepage – uplift pressure, and critical hydraulic gradient.

UNIT - III

Compaction and Consolidation: Compaction Curve, Compaction Control, Oedometer test, Over consolidation ratio, Primary and secondary consolidation settlement, One, two and three dimensional Consolidation, Consolidation of partially saturated soils.

UNIT - IV

Stress-Strain-Strength Behaviour of Soils: Principle Stresses, Mohr Circle, Shear strength of soils; Failure criteria, drained and undrained shear strength of soils. Significance of pore pressure parameters; Determination of shear strength; Drained, Consolidated Undrained and Undrained tests; Interpretation of triaxial test results. Behaviour of sands; Critical void ratio; dilation in soils, Stress paths.

UNIT - V

Critical State Soil Mechanics: Critical state parameters; Critical state for normally consolidated and over consolidated soil; Significance of Roscoe and Hvorslev state boundary surfaces; Yielding, Bounding Surfaces.

TEXT BOOKS

• 1. Das, B. M. & Sobhan K,- Principles of Geotechnical Engineering, Cengage Learning, Edition (2015)
• 2. Mitchell J.K. - Fundamentals of soil behaviour - John Wiley and Sons, Inc., New York. (Third edition) 2005

REFERENCES:

• 1. Atkinson J. H. - An Introduction to the Mechanics of Soils and Foundation - through critical state soil mechanics, McGraw- Hill Co. (1993)
• 2. J A Knappett and R F Craig – Craig’s Soil Mechanics, Eighth Edition, Spon Press Taylor & Francis (2012)
• 3. Lambe, T. W. and Whitman, R. V.- Soil Mechanics SI version , John Wiley & Sons.(2011)