# Geotechnical Engineering – II

 Course Code : ULZ0176 Author : uLektz University : General for All University Regulation : 2017 Categories : Civil Format : ePUB3 (DRM Protected) Type : eBook

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Description :Geotechnical Engineering – II of ULZ0176 covers the latest syllabus prescribed by General for All University for regulation 2017. Author: uLektz, Published by uLektz Learning Solutions Private Limited.

Note : No printed book. Only ebook. Access eBook using uLektz apps for Android, iOS and Windows Desktop PC.

##### Topics
###### UNIT - I SUBSURFACE EXPLORATION,DRAINAGE AND DEWATERING

1.1 SUBSURFACE EXPLORATION: Importance of exploration program, Methods of exploration: Boring, Seismic refraction method of geophysical exploration

1.2 Types of samples - undisturbed, disturbed and representative samples, Samplers, sample disturbance, area ratio, Recovery ratio, clearance, Stabilisation of boreholes - Typical bore log. Number and depth of borings for various civil engineering structures, Soil exploration report.

1.3 DRAINAGE AND DEWATERING: Determination of ground water level by Hvorselev’s method, Control of ground water during excavation: Dewatering - Ditches and sumps, well point system, Vacuum method, Electro- Osmosis method.

###### UNIT - II STRESSES IN SOILS

2.1 STRESSES IN SOILS: Boussinesq’s and Westergaard’s theories for concentrated, circular and rectangular loads. Comparison of Boussinesq’s and westergaard’s analysis.

2.2 Pressure distribution diagrams, Contact pressure, Newmark’s Chart

###### UNIT - III FLOWNETS

3.1 FLOWNETS: Laplace equation (no derivation) assumptions and limitations only, Characteristics and uses of flownets, Methods of drawing flownets for Dams and sheet piles.

3.2 Estimating quantity of seepage and Exit gradient. Determination of phreatic line in earth dams with and without filter. Piping and protective filter

###### UNIT - IV LATERAL EARTH PRESSURE

4.1 LATERAL EARTH PRESSURE: Active and Passive earth pressures, Earth pressure at rest

4.2 Rankine’s and Coulomb’s Earth pressure theories–assumptions and limitations

4.3 Graphical solutions for active earth pressure (cohesionless soil only) – Culmann’s and Rebhann’s methods, Lateral earth pressure in cohesive and cohesionless soils, Earth pressure Distribution

###### UNIT - V STABILITY OF EARTH SLOPES

5.1 STABILITY OF EARTH SLOPES: Types of slopes, Causes and type of failure of slopes

5.2 Definition of factor of safety, Stability of infinite slopes, Stability of finite slopes by Method of slices and Friction Circle method, Taylor’s stability number, Fellineous method

###### UNIT - VI BEARING CAPACITY

6.1 BEARING CAPACITY: Definitions of ultimate, net and safe bearing capacities, Allowable bearing pressure

6.2 Terzaghi’s and Brinch Hansen’s bearing capacity equations - assumptions and limitations, Bearing capacity of footing subjected to eccentric loading

6.3 Effect of ground water table on bearing capacity, Field methods of evaluation of bearing capacity - Plate load test, Standard penetration test and cone penetration test

###### UNIT - VII FOUNDATION SETTLEMENT

7.1 FOUNDATION SETTLEMENT: Importance and Concept of Settlement Analysis, Immediate, Consolidation and Secondary settlements (no derivations, but, computation using relevant formula for Normally Consolidated soils), Tolerance, BIS specifications for total and differential settlements of footings and rafts

###### UNIT - VIII PROPORTIONING SHALLOW AND PILE FOUNDATIONS

8.1 PROPORTIONING SHALLOW AND PILE FOUNDATIONS: Allowable Bearing Pressure, Factors influencing the selection of depth of foundation, Factors influencing Allowable Bearing Pressure, Factors influencing the choice of foundation

8.2 Proportioning isolated, combined, strip and mat foundations

8.3 Classification of pile foundation, Pile load capacity, Proportioning pile foundation