JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Overview

Course objectives:

• 1. To select suitable ground improvement techniques for problematic soils.
• 2. To select suitable mechanical and hydraulic modifications.
• 3. To evaluate suitable physical and chemical modifications.
• 4. To adept soil reinforcement techniques.

Course Outcomes

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

• 1. Understand, Analyse and Apply the mechanical and hydraulic ground improvement
• 2. methods for problematic soils
• 3. Apply Physical and Chemical Modification techniques to improve the in-situ soil
• 4. Design suitable ground improvement methods using reinforcement technique

UNIT - I

Introduction to Engineering Ground Modification: Need and objectives, Identification of soil types, In situ and laboratory tests to characterize problematic soils; Mechanical, Hydraulic, Physico- chemical, Electrical, Thermal methods, and their applications.

UNIT - II

Mechanical Modification – Deep Compaction Techniques- Blasting Vibrocompaction, Dynamic Tamping and Compaction piles.

UNIT - III

Hydraulic Modification – Objectives and techniques, traditional dewatering methods and their choice, Design of dewatering system, Electro-osmosis, Electro-kinetic dewatering. Filtration, Drainage and Seepage control with Geosynthetics, Preloading and vertical drains.

UNIT - IV

Physical and Chemical Modification – Modification by admixtures, Shotcreting and Guniting Technology, Modification at depth by grouting, Crack Grouting and compaction grouting, Jet grouting, Thermal Modification, Ground freezing.

UNIT - V

Modification by Inclusions and Confinement - Soil reinforcement, reinforcement with strip, and grid reinforced soil. In-situ ground reinforcement, ground anchors, rock bolting and soil nailing.

REFERENCES:

• 1. Hausmann, M. R. (1990) – Engineering Principles of Ground Modifications, McGraw Hill publications
• 2. M. P. Moseley and K. Krisch (2006) – Ground Improvement, II Edition, Taylor and Francis
• 3. Koerner, R. M (1994) – Designing with Geosynthetics – Prentice Hall, New Jersey
• 4. Jones C. J. F. P. (1985) – Earth Reinforcement and soil structures – Butterworths, London.
• 5. Xianthakos, Abreimson and Bruce - Ground Control and Improvement, John Wiley & Sons, 1994.
• 6. K. Krisch & F. Krisch (2010) - Ground Improvement by Deep Vibratory Methods, Spon Press, Taylor and Francis R19 M.TECH GEOTECHNICAL ENGG.
• 7. Donald P Coduto – Foundation Design Principles and Practices, 2nd edition, Pearson, Indian edition, 2012. R19 M.TECH GEOTECHNICAL ENGG. M.TECH.- I YEAR- I SEMESTER GEOTECHNICAL ENGINEERING