Ground Improvement Techniques Notes JNTU – GIT Notes JNTU of Total Complete Notes
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All the above chapter are covered according to the below units(JNTU)
GROUND IMPROVEMENT TECHNIQUES
UNIT – I
Dewatering: methods of de- watering- sumps and interceptor ditches- single, multistage well points – vacuum well points- Horizontal wells-foundation drains-blanket drains- criteria for selection of fill material around drains Electro-osmosis.
Grouting: Objectives of grouting- grouts and their properties- grouting methods- ascending, descending and stage grouting- hydraulic fracturing in soils and rocks- post grout test.
UNIT – III
In – situ densiﬁcation methods in granular Soils:- Vibration at the ground surface, Impact at the Ground Surface, Vibration at depth, Impact at depth.
UNIT – IV
In- situ densification methods in Cohesive soils:- preloading or dewatering, Vertical drains – Sand Drains, Sand wick geodrains — Stone and lime columns – thermal methods.
UNIT – V
Reinforced Earth: Principles – Components of reinforced earth – factors governing design of reinforced earth walls — design principles of reinforced earth walls.
UNIT – VI
Geosynthetics : Description, properties, functions and applications of gleosynthetics
UNIT – VII
Geoenvironmental application of geosynthetics : Geomembranes for landfills and ponds, Geosynthetic clay liner, Designing with GCL;s, Filtration, Erosion control, slope protection.
UNIT – VIII
Stabilization: Methods of stabilization-mechanical-cement lime-bituminous- chemical stabilization with calcium chloride, sodium silicate and gypsum.
Expansive soils: Problems of expansive soils – tests for identification methods of determination of swell pressure. Improvement of expansive soils – Foundation techniques in expansive soils — under reamed piles.