CE8491 SOIL MECHANICS

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Important questions 

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 UNIT I 

1.formation and types of soil **

2. clay mineralogy structural arrangement of grains 3.Classification, BIS, US ,phase relationship**

4. field Compaction method , factors influencing compaction.**

UNIT II 

1.Static pressure in water, Effective stress concepts in soils ,Capillary phenomena–

Permeability 2 mark 

 2. Darcy?s law ,Determination of Permeability , Laboratory Determination (Constant head and falling head methods) and field measurement pumping out in unconfined and confined aquifer***

 3.Factors influencing permeability of soils

4.Two dimensional flow , Laplace equation ***

UNIT III  

1.Stress distribution in homogeneous and isotropic medium

2. Boussines of theory ,(Point load, Line load and udl) Use of Newmarks influence chart 

3. Factors influencing settlement , Terzaghi?s one dimensional consolidation theory 

4. vt and log t methods. e-log p relationship consolidation settlement N-C clays 

UNIT IV SHEAR STRENGTH

Shear strength of cohesive and cohesion less soils — Mohr-Coulomb failure theory — shear strength — Direct shear, Triaxial compression, UCC and Vane shear tests — Pore pressure parameters — Factors influences shear strength of soil.

UNIT V SLOPE STABILITY

Infinite slopes and finite slopes —- Friction circle method — Use of stability number –Guidelines for location of critical slope surface in cohesive and c — soil — Slope protection measures.

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**Very important questions are bolded and may be asked based on this topic

PART-C

1.Compulsory Questions {a case study where the student will have to read and analyse the subject }

mostly asked from unit 2, 5(OR) a situation given and you have to answer on your own

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UNIT I SOIL CLASSIFICATION AND COMPACTION

History — formation and types of soil — composition — Index properties — clay mineralogy structural arrangement of grains — description — Classification — BIS — US — phase relationship — Compaction — theory — laboratory and field technology — field Compaction method — factors influencing compaction.

UNIT II EFFECTIVE STRESS AND PERMEABILITY

Soil — water — Static pressure in water — Effective stress concepts in soils — Capillary phenomena–

— Permeability — Darcy?s law — Determination of Permeability — 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 wier.

UNIT III STRESS DISTRIBUTION AND SETTLEMENT 

Stress distribution in homogeneous and isotropic medium — Boussines of theory — (Point load, Line load and udl) Use of Newmarks influence chart –Components of settlement — Immediate and consolidation settlement — Factors influencing settlement — Terzaghi?s one dimensional consolidation theory — Computation of rate of settlement. — vt and log t methods. e-log p relationship consolidation settlement N-C clays — O.C clays — Computation.

UNIT IV SHEAR STRENGTH

Shear strength of cohesive and cohesion less soils — Mohr-Coulomb failure theory — shear strength — Direct shear, Triaxial compression, UCC and Vane shear tests — Pore pressure parameters — Factors influences shear strength of soil.

UNIT V SLOPE STABILITY

Infinite slopes and finite slopes —- Friction circle method — Use of stability number –Guidelines for location of critical slope surface in cohesive and c — soil — Slope protection measures.