Basics of Reinforced Earth Construction:
Definition, Historical Background, Components, Mechanism and Concept, Advantages and Disadvantage of reinforced earth Construction, Sandwich technique for clayey soil.
Geosynthetics and Their Functions:
Historical developments, Recent developments, manufacturing process woven &non-woven, Raw materials –Classification based on materials type – Metallic and Non-metallic, Natural and Man-made, Geosynthetics.
Properties and Tests on Materials
Properties – Physical, Chemical, Mechanical, Hydraulic, Endurance and Degradation requirements, Testing & Evaluation of properties.
Design of Reinforced Earth Retaining Walls:
Concept of Reinforced earth retaining wall, Internal and external stability, Selection of materials, Typical design problems
Soil Nailing Techniques:
Concept, Advantages & limitations of soil nailing techniques, comparison of soil nailing with reinforced soil, methods of soil nailing, Construction sequence, Components of system, Design aspects and precautions to be taken.
Design of Reinforced Earth Foundations:
Modes of failure of foundation, Determination of force induced in reinforcement ties – Location of failure surface, tension failure and pull out resistance, length of tie and its curtailment, Bearing capacity improvement in soft soils, General guidelines.
Geosynthetics for Roads and Slopes:
Roads - Applications to Temporary and Permanent roads, Role of Geosynthetic in enhancing properties of road, control of mud pumping, Enhancing properties of subgrade, Design requirements Slopes – Causes for slope failure, Improvement of slope stability with Geosynthetic, Drainage requirements, Construction technique. Simple Numerical Stability Checking Problems on Reinforced Slopes.
Geosynthetics - filter, drain and landfills:
Filter & Drain – Conventional granular filter design criteria, Geosynthetic filter design requirements, Drain and filter properties, Design criteria – soil retention, Geosynthetic permeability, anti clogging, survivability and durability (No Numerical Problems) Landfills – Typical design of Landfills – Landfill liner & cover, EPA Guidelines, Barrier walls for existing landfills and abandoned dumps (No Numerical Problems).
Course outcomes:
After studying this course, students will be able to:
1. identify, formulate reinforced earth techniques that are suitable for different soils and in different structures;
2. understand the laboratory testing concepts of Geo synthetics
3. design RE retaining structures and Soil Nailing concepts
4. Determine the load carrying capacity of Foundations resting on RE soil bed.
5. asses the use of Geo synthetics in drainage requirements and landfill designs
Question paper pattern:
Textbooks:
1. Koerner. R.M, “Design with Geo synthetics”, Prince Hall Publications
2. Koerner. R.M. &Wesh, J.P, “Construction and Geotechnical Engineering using synthetic fabrics”, Wiley Inter Science, New York,.
3. Sivakumar Babu G. L., “An introduction to Soil Reinforcement and Geo synthetics”, Universities Press, Hyderabad
4. Swami Saran, “Reinforced Soil and its Engineering Applications”, I. K. International Pvt. Ltd, New Delhi
5. Venkattappa Rao, G., & Suryanarayana Raju., G. V.S, “Engineering with Geo synthetics”, Tata McGraw Hill publishing Company Limited., New Delhi.
Reference Books:
1. Jones, “Earth reinforcement and Soil structure”, CJEP Butterworths, London
2. Ingold, T.S. & Millar, K.S, “Geotextile Hand Book”, Thomas, Telford, London.
3. Hidetoshi Octial, Shigenori Hayshi& Jen Otani, “Earth Reinforcement Practices”,Vol. I, A.A. Balkema, Rotterdam
4. Bell F.G, “Ground Engineer’s reference Book”, Butter worths, London
5. Ingold, T.S, “Reinforced Earth”, Thomas, Telford, London.
6. Sarsby R W- Editor, “Geo synthetics in Civil Engineering”, Wood head Publishing Ltd & CRC Press, 2007