__E3404__

__SOIL MECHANICS__

__ __

**COURSE OBJECTIVES**

• To impart knowledge to classify the soil based on
index properties and to assess their engineering properties based on the
classification. To familiarize the students about the fundamental concepts of
compaction, flow through soil, stress transformation, stress distribution,
consolidation and shear strength of soils. To impart knowledge of design of
both finite and infinite slopes.

**UNIT I**

**SOIL CLASSIFICATION AND COMPACTION **

Formation of soil - Soil description - Particle -
Size shape and colour - Composition of gravel, sand, silt, clay particles -
Particle behaviour - Soil structure - Phase relationship - Index properties -
Significance BIS classification system - Unified classification system -
Compaction of soils - Theory, Laboratory and field tests - Field Compaction
methods - Factors influencing compaction of soils.

**UNIT II**

**EFFECTIVE STRESS AND PERMEABILITY **

Soil-water - Static pressure in water - Effective
stress concepts in soils - Capillary phenomena- Permeability interaction
Hydraulic conductivity Darcy's law Determination of Hydraulic Conductivity
Laboratory Determination (Constant head and falling head methods) and field
measurement pumping out in unconfined and confined aquifer - Factors
influencing permeability of soils - Seepage - Two dimensional flow - Laplace's
equation - Introduction to flow nets - Simple problems. (Sheet pile and weir).

**UNIT III**

**STRESS DISTRIBUTION AND SETTLEMENT**

Stress distribution in homogeneous and isotropic
medium - Boussinesq theory (Point land, Line land and udl) Use of New marks
influence chart -Components of settlement Immediate and consolidation
settlement - Terzaghi's one dimensional consolidation theory - Computation of
rate of settlement. Vt and log t methods- e-log p relationship.

**UNIT IV**

**SHEAR STRENGTH**

Shear strength of cohesive and cohesion less soils -
Mohr-Coulomb failure theory - Measurement of shear strength - Direct shear,
Triaxial compression, UCC and Vane shear tests - Pore pressure parameters -
Cyclic mobility - Liquefaction.

**UNIT V**

**SLOPE STABILITY**

Stability Analysis - Infinite slopes and finite
slopes - Total stress analysis for saturated clay - Friction circle method -
Use of stability number - Method of slices - Fellenious and Bishop's method -
Slope protection measures.

**TOTAL:
45 PERIODS**

**COURSE OUTCOMES:**

On completion of the course, the student is expected
to be able to

**CO1**
Demonstrate an ability to identify various types of soils and its properties,
formulate and solve engineering Problems

**CO2**
show the basic understanding of flow through soil medium and its impact of
engineering solution

**CO3**
Understand the basic concept of stress distribution in loaded soil medium and
soil settlement due to consolidation

**CO4**
Show the understanding of shear strength of soils and its impact of engineering
solutions to the loaded soil medium and also will be aware of contemporary
issues on shear strength of soils.

**CO5**
Demonstrate an ability to design both finite and infinite slopes, component and
process as per needs and specifications.

**TEXTBOOKS:**

1. Murthy, V.N.S., "Soil Mechanics and
Foundation Engineering", CBS Publishers Distribution Ltd., New Delhi. 2015

2. Gopal Ranjan and Rao, A.S.R., "Basic and
Applied Soil Mechanics", New Age Ltd. International Publisher New Delhi
(India) 2006.

**REFERENCES:**

1. McCarthy, D.F., "Essentials of Soil
Mechanics and Foundations". Prentice-Hall, 2006.

2. Coduto, D.P., "Geotechnical Engineering -
Principles and Practices", Prentice Hall of India Pvt.Ltd. New Delhi,
2010. Gotechnical Engracing. Books / Coles, The /

3. Das, B.M., "Principles of Geotechnical
Engineering". Brooks/Coles / Thompson Learning Singapore, 8th Edition,
2013.

4.
Punmia, B.C., "Soil Mechanics and Foundations", Laxmi Publications
Pvt. Ltd. New Delhi, 2005.