Course

Unit 1

Objective of ground improvement, in-situ ground improvement methods, Introduction to soil improvement without the addition of many materials, Surface compaction, Compaction methods: moisture density relations – compactive efforts – field methods – surface compaction, deep compactions- vibro-probes, Stone columns.

Unit 2

Drainage methods: seepage, ground water seepage control – filter requirements, methods of dewatering – deep bored wells. Precompression & Vertical Drains: Compressibility of soils & consolidation, Preloading and surcharge fills – precompression principles, preloading methods, monitoring of compression, Vertical drains, Dynamic consolidation & Consolidaion by Electro-osmosis. Grouting and injection methods: principles, selection of methods and requirements. Aspects of grouts, types of grouts and chemical applications.

Unit 3

Stabilization methods: mechanical, use of admixtures- cement, lime, chemical methods of stabilization of soils – Reinforcing materials, reinforced earth retaining walls, reinforced embankments, soil nailing, Geosynthetics- types, general applications, types of geotextiles and geogrids, physical and strength properties of geotextiles and geogrids, Behavior of soils on reinforcing with geotextiles and geogrids, design aspects with geotextiles and geogrids.

Prerequisite(s): 23CIE211 Geology and Soil Mechanics

Course Objective

Introduction to the necessity, identification, and process of ground improvement, finding alternative methods and suggesting recommendations.

Course Outcome

CO1: Evaluate the various ground improvement techniques using mechanical methods such as compaction,

vibroflotation, preloading etc.

CO2: Analyze the various types of drainage techniques, pre-compression methods and grouting.

CO3: Examining the effectiveness of chemical additives and reinforcing materials in ground improvement.

CO-PO Mapping

Text book(s)

Moseley, “Text Book on Ground Improvement”, Blackie Academic Professional, Chapman & Hall, 1994.

Purushothama Raj P., “Ground Improvement Techniques” Laxmi Publications, 2005.

Reference(s)

Shashi K. Gulati and Manoj Dutta, “Geotechnical Engineering”, Tata Mcgraw Hill, 2005.

Boweven R., “Text Book on Grouting in Engineering Practice”, John Wiley and Sons, 1981.

Jewell R.A., Soil reinforcement with geotextiles- CIRIA Special Publication, Thomas Telford, 1996.

Donald H Gray Robbin B Sotir, “Text Book on Biotechnical and Soil Engineering Slope Stabilization”, Wiley International, 1996.

Rao G.V. & Rao G.V.S. “Text Book on Engineering with Geotextiles”, Tata Mcgraw Hill, 1990.

Robert M. Koerner, Construction & Geotechnical methods in Foundation Engineering”, McGraw Hill, 1986.