Course Details
Subject {L-T-P / C} : CE6134 : Earth Retaining Structures { 3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Rabi Narayan Behera
Syllabus
Module I: Earth Pressure: Fundamental relationships between the lateral pressures and the strain with a back fill. Rankine and Coulomb theories, Active, passive and pressure at rest Backfill with broken surface, wall with broken back, concentrated surcharge above the back fill, earth pressure due to uniform surcharge, earth pressure of stratified backfills, saturated and partially saturated backfill. Passive earth pressure in engineering practice Assumption and conditions, point of application of passive earth pressures [10 hrs]
Module II: Bulkheads: Definition and assumptions, conditions of end supports and distribution of active earth pressure and bulkheads, bulkheads with free and fixed earth supports, equivalent beam method, Improvements suggested by Rowe, Tschebotarioff’s method, Anchorage of bulkheads and resistance of anchor walls, spacing between bulkheads and anchor walls, resistance of anchor plates, Consideration of effects of ground water, seepage, surcharge loading together with possibility of shallow and deep sliding failures on retaining structure. [12 hrs]
Module III: Sheet Pile wall: Free earth system, fixed earth system, Dead man. [04 hrs]
Module IV: Tunnel and Conduit: Stress distribution around tunnels, Types of conduits, Load on projecting conduits. [03 hrs]
Module V: Arching and Open Cuts: Arching in soils, Braced excavations, Earth pressure against bracings in cuts, Heave of the bottom of cut in soft clays. [04 hrs]
Module VI: Reinforced earth retaining structures- Basics of geosysnhetics, Design of mechanically stabilized earth wall (MSE) [04 hrs]
Course Objectives
- Learn the basic principle of lateral earth pressure and its application to various earth retaining structures
- Evaluate the stability analysis of retaining structures
- Understand the basic concept of Tunneling
- Design various earth retaining structures
Course Outcomes
1. Understand the basic principles of lateral earth pressure <br />2. Learn the various theories related to lateral earth pressure and earth retaining structures <br />3. Understand the basic concept of Tunneling <br />4. Able to carry out stability analysis of retaining structures <br />5. Design various earth retaining structures
Essential Reading
- B. M. Das, Principles of Foundation Engineering, Thomson, Indian Edition , Haryana, India
- J. Bowel, Foundation Engineering, Analysis and Design, McGrwHill , New York, USA
Supplementary Reading
- P. Raj, Geotechnical Engineering, Tata McGraw Hill , New York, USA
- R F Craig, Soil Mechanics, Chapman and Hall (ELBS) , Florida, USA