JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives

the objectives of the course are to

• understand the formation of soil and classification of the soils
• determine the Index & Engineering Properties of Soils
• determine the flow characteristics & stresses due to externally applied loads
• estimate the consolidation properties of soils
• estimate the shear strength and seepage loss

Course Outcomes

At the end of the course the student will able to

• Characterize and classify the soils
• Able to estimate seepage, stresses under various loading conditions and compaction characteristics
• Able to analyse the compressibility of the soils
• Able to understand the strength of soils under various drainage conditions

UNIT - I

Introduction: Soil formation and structure – moisture content – Mass, volume relationships – Specific Gravity-Field density by core cutter and sand replacement methods-Relative density. Index Properties of Soils: Grain size analysis – consistency limits and indices – I.S. Classification of soils.

UNIT - II

Permeability: Soil water – capillary rise – flow of water through soils – Darcy’s law- permeability – Factors affecting permeability – laboratory determination of coefficient of permeability –Permeability of layered soils. Effective Stress & Seepage Through Soils: Total, neutral and effective stress – principle of effective stress - quick sand condition – Seepage through soils – Flownets: Characteristics and Uses.

UNIT - III

Stress Distribution in Soils: Boussinesq’s and Westergaard’s theories for point load, uniformly loaded circular and rectangular areas, pressure bulb, variation of vertical stress under point load along the vertical and horizontal plane, and Newmark’s influence chart for irregular areas. COMPACTION: Mechanism of compaction – factors affecting compaction – effects of compaction on soil properties – Field compaction Equipment – compaction quality control.

UNIT - IV

Consolidation: Types of compressibility – Immediate Settlement, primary consolidation and secondary consolidation - stress history of clay; e-p and e-log(p) curves – normally consolidated soil, over consolidated soil and under consolidated soil - preconsolidation pressure and its determination - Terzaghi’s 1-D consolidation theory – coefficient of consolidation: square root time and logarithm of time fitting methods - computation of total settlement and time rate of settlement.

UNIT - V

Shear Strength of Soils: Importance of shear strength – Mohr’s– Coulomb Failure theories – Types of laboratory tests for strength parameters – strength tests based on drainage conditions – strength envelops – Shear strength of sands - dilatancy – critical void ratio, Introduction to stress path method.

R18 B.TECH CIVIL ENGG. III YEAR

TEXT BOOKS:

• 1. Basic and Applied Soil Mechanics by Gopal Ranjan & ASR Rao, New age International Pvt Ltd,
• 2. Soil Mechanics and Foundation Engineering by VNS Murthy, CBS Publishers and Distributors.
• 3. Foundation Engineering by P.C. Varghese, PHI

REFERENCES:

• 1. Soil Mechanics and Foundation Engg. By K.R. Arora, Standard Publishers and Distributors, Delhi.
• 2. Principals of Geotechnical Engineering by Braja M. Das, Cengage Learning Publishers.
• 3. Geotechnical Engineering by C. Venkataramiah, New age International Pvt. Ltd, (2002).
• 4. Geotechnical Engineering Principles and Practices by Cuduto, PHI International.
• 5. Geotechnical Engineering by Manoj Dutta & Gulati S.K – Tata McGraw-Hill Publishers New Delhi.
• 6. Soil Mechanics and Foundation by by B.C. Punmia, Ashok Kumar Jain and Arun Kumar Jain, Laxmi, publications Pvt. Ltd., New Delhi R18 B.TECH CIVIL ENGG. III YEAR