18GEPE22 GROUND IMPROVEMENT TECHNIQUES L T P C 3 00 3 COURSE OBJECTIVE To identify weak suggest suitable improvements methods and to be familiar with the equipments used for improvement. COURSE OUTCOMES At the end of the course, students will be able to CO1 : Understand the parameters of weak soil and the techniques used for treating such soils. CO2 : Know various types of stabilizers, stabilization techniques and its application in the field. CO3 : Know the environmental sustainability of each method. CO4:Know various types ofGrouting techniques CO5:Acquire knowledge for application of grouting methods in the field UNIT I DEWATERING (09) Introduction Scope and necessity of ground improvement New Technologies – – – Basic concepts Drainage methods Ground water lowering by well points Deep well, – – – Vacuum and Electro Osmosis methods. – UNIT II COMPACTION AND SAND DRAINS (09) In-situ compaction of cohesionless and cohesive Shallow and deep compaction – Vibration methods Vibro-compaction, Blasting, Vibrating probe, Vibratory rollers, – – compaction, Vibroflotation Concept, Factors influencing compaction Heavy – – Tamping Vertical drains Preloading with sand drains, Fabric drains, Wick drains Design – – – of sand drains Relative merits of different methods Limitations. – – UNIT III STONE COLUMN AND CONSOLIDATION (09) Precompression and consolidation Dynamic consolidation Electro-osmotic – – consolidation Stone column Functions Methods of installation Design estimation of – – – – load carrying capacity of stone column Settlement of stone column Lime piles Earth – – – reinforcement Soil Nailing Types of reinforcement material Applications. – – – UNIT IV STABILIZATION (09) Introduction Stabilization methods Mechanical, Cement, Lime, Bitumen, – – Chemical stabilization Electrical stabilization Stabilization by Thermal and Freezing – – techniques Ground improvement by excavating and replacing Stabilization of expansive – – clays Prewetting. –
18GEPE22 GROUND IMPROVEMENT TECHNIQUES L T P C 3 00 3 COURSE OBJECTIVE To identify weak suggest suitable improvements methods and to be familiar with the equipments used for improvement. COURSE OUTCOMES At the end of the course, students will be able to CO1 : Understand the parameters of weak soil and the techniques used for treating such soils. CO2 : Know various types of stabilizers, stabilization techniques and its application in the field. CO3 : Know the environmental sustainability of each method. CO4:Know various types ofGrouting techniques CO5:Acquire knowledge for application of grouting methods in the field UNIT I DEWATERING (09) Introduction – Scope and necessity of ground improvement – New Technologies – Basic concepts – Drainage methods – Ground water lowering by well points – Deep well, Vacuum and Electro – Osmosis methods. UNIT II COMPACTION AND SAND DRAINS (09) In-situ compaction of cohesionless and cohesive – Shallow and deep compaction – Vibration methods – Vibro-compaction, Blasting, Vibrating probe, Vibratory rollers, compaction, Vibroflotation – Concept, Factors influencing compaction – Heavy Tamping – Vertical drains – Preloading with sand drains, Fabric drains, Wick drains – Design of sand drains – Relative merits of different methods – Limitations. UNIT III STONE COLUMN AND CONSOLIDATION (09) Precompression and consolidation – Dynamic consolidation – Electro-osmotic consolidation – Stone column – Functions – Methods of installation – Design estimation of load carrying capacity of stone column – Settlement of stone column – Lime piles – Earth reinforcement – Soil Nailing – Types of reinforcement material – Applications. UNIT IV STABILIZATION (09) Introduction – Stabilization methods – Mechanical, Cement, Lime, Bitumen, Chemical stabilization – Electrical stabilization – Stabilization by Thermal and Freezing techniques – Ground improvement by excavating and replacing – Stabilization of expansive clays – Prewetting.