JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-Requisites

Soil Mechanics

Course Objectives

To impart the knowledge on various soil exploration techniques, and

analyse and design of various substructures, such as slopes, retaining walls, shallow foundations, and pile foundations.

Course Outcomes

At the end of the course, the student will be able to:

Check the stability of slopes, analyze, and design the shallow and pile foundations, and earth retaining structures.

UNIT - I

Soil Exploration: Need – methods of soil exploration – boring and sampling methods – penetration tests – plate load test – pressure meter – planning of soil exploration programme and preparation of soil investigation report.

UNIT - II

Slope Stability: Infinite and finite earth slopes – types of failures – factor of safety of infinite slopes – stability analysis by Swedish slip circle method, method of slices, Bishop’s Simplified method of slices – Taylor’s Stability Number- stability of slopes of earth dams under different conditions.

UNIT - III

Earth Pressure Theories: At-rest earth pressures, Rankine’s theory of earth pressure – earth pressures in layered soils – Coulomb’s earth pressure theory – Culmann’s graphical method, effect of pore water, earth pressure due to surcharge loads. Retaining Walls: Types of retaining walls – stability of gravity and cantilever retaining walls against overturning, sliding and, bearing capacity modes of failure, Drainage from backfill, introduction to reinforced earth walls.

UNIT - IV

Shallow Foundations - Types - choice of foundation – location and depth - safe bearing capacity – shear criteria – Terzaghi’s, and IS code methods - settlement criteria – allowable bearing pressure based on SPT N value and plate load test – allowable settlements of structures.

UNIT - V

Pile Foundation: Types of piles – load carrying capacity of piles based on static pile formulae – dynamic pile formulae – Pile Capacity through SPT and CPT results - pile load tests - load carrying capacity of pile groups in sands and clays – Settlement of pile groups – negative skin friction Well Foundations: Types – different shapes of wells – forces on wells - components of wells – Grip length – sinking of wells – tilts and shifts.

R16 B.TECH CIVIL ENGG.

TEXT BOOKS:

• 1. Das, B.M., - (2011) Principles of Foundation Engineering –7th edition, Cengage Publishing.
• 2. Foundation Design Principles and Practices, Donald P. Coduto, 2 nd Edition, Pearson Publishers.
• 3. Bowles, J.E., (2012) Foundation Analysis, and Design – 5th Edition, McGraw-Hill Publishing company, Newyork.

REFERENCES:

• 1. Geotechnical Engineering by S. K. Gulhati & Manoj Datta – Tata Mc Graw Hill Publishers New Delhi. 2005.
• 2. Soil Mechanics and Foundation Engineering by VNS Murthy, CBS Publishers, and Distributors.
• 3. Basic and Applied Soil Mechanics by Gopal Ranjan & ASR Rao, New age International Pvt. Ltd, New Delhi
• 4. Analysis and Design of Substructures – Swami Saran, Oxford, and IBH Publishing company Pvt Ltd (1998).
• 5. Soil Mechanics and Foundation Engineering by B. N. D. Narasinga Rao, Wiley (2015).
• 6. Geotechnical Engineering by Debsashis Mitra Universities Press (2016). R16 B.TECH CIVIL ENGG.