JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre Requisites

Soil Mechanics

Course Objectives

To understand the importance of ground improvement and know various

ground improvement techniques available to date, and selecting and designing suitable ground improvement technique for given soil conditions.

Course Outcomes

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

Identify suitable ground improvement technques for specific project and its implications.

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, etc. and their applications.

UNIT - II

Mechanical Modification – Principles of soil densification – Properties of Compacted soil, Compaction control tests, Specification of compaction requirements, 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, Filtration, Drainage and seepage control with Geosynthetics, Preloading and vertical drains, Electro-kinetic dewatering.

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, bar, mesh, sheet and grid reinforced soil. In-situ ground reinforcement, ground anchors, rock bolting and soil nailing.

TEXT BOOKS:

• 1. Hausmann, M. R. (1990) – Engineering Principles of Ground Modifications, McGraw Hill publications
• 2. Patra, N.R. (2012)– Ground Improvement Techniques, Vikas Publications
• 3. Purushothama Raj (1995) – Ground Improvement Techniques, Laxmi Publications, India

REFERENCES:

• 1. M. P. Moseley and K. Krisch (2006) – Ground Improvement, 2nd Edition, Taylor and Francis. R16 B.TECH CIVIL ENGG.
• 2. K. Krisch & F. Krisch (2010) – Ground Control and Improvement, John Wiley & Sons 1994.
• 3. Nicholson, P.G. (2015). Soil Improvement and Ground Modification methods, Elsevier Publishers. R16 B.TECH CIVIL ENGG.