Ground Improvement Techniques

CE6012                  GROUND IMPROVEMENT TECHNIQUES                 L T P C 3 0 0 3

 

OBJECTIVES:

 

 At the end of the course student is expected to identify the problematic soil and suitable suggest remedial measures to improve their behaviour.

 

UNIT I PROBLEMATIC SOIL AND IMPROVEMENT TECHNIQUES                                        8

Role of ground improvement in foundation engineering – methods of ground improvement – Geotechnical problems in alluvial, lateritic and black cotton soils – Selection of suitable ground improvement techniques based on soil conditions.

UNIT II DEWATEREING                                                                                                             10

Dewatering Techniques - Well points – Vacuum and electroosmotic methods – Seepage analysis for two – dimensional flow for fully and partially penetrated slots in homogeneous deposits - Simple cases - Design.

UNIT III INSITU TREATMENT OF COHESIONLESS AND COHESIVESOILS                       10

Insitu densification of cohesion-less soils and consolidation of cohesive soils: Dynamic compaction Vibroflotation, Sand compaction piles and deep compaction. Consolidation: Preloading with sand drains, and fabric drains, Stone columns and Lime piles-installation techniques – simple design - relative merits of above methods and their limitations.

UNIT IV EARTH REINFORCEMENT                                                                                         9

Concept of reinforcement – Types of reinforcement material – Reinforced earth wall – Mechanism – simple design - applications of reinforced earth. Role of Geotextiles in filtration, drainage, separation, road works and containment.

UNIT V GROUT TECHNIQUES                                                                      8

Types of grouts – Grouting equipments and machinery – injection methods – Grout monitoring – stabilization with cement, lime and chemicals – stabilization of expansive soil.

 

TOTAL: 45

 

PERIODS OUTCOMES:

 Student will be in a position to identify and evaluate the deficiencies if any in the deposits of a project area and capable of providing alternate methods to improve its character suitable to the project so that the structures built will be stable and serve.

Model Question Papers: 2010, 2012, 2013, 2014

 REFERENCE: NPTEL - Course-1 and NPTEL - Course-2

TEXT BOOKS: 1. Purushothama Raj. P, “Ground Improvement Techniques”, Firewall Media, 2005.  2. Koerner, R.M. “Construction and Geotechnical Methods in Foundation Engineering”, McGraw Hill, 1994. 3. Mittal.S, “An Introduction to Ground Improvement Engineering”, Medtech Publisher, 2013.

 

 

HIGHWAY ENGINEERING

 

DESIGN OF FLEXIBLE PAVEMENT - IRC 37

DESIGN OF RIGID PAVEMENT - IRC 58