Recent Trends Slide 5 Materials Science (Neo/Nano Materials) - - PowerPoint PPT Presentation

• Materials Science (Neo/Nano Materials)
• Mining (Mineral Engineering)
• Geo-hazard Mitigation
• IT/ AI/Expert Systems
• Bio-geo interface (Molecular mechanics)
• Fire Protection Engineering
• Infrastructure Engineering (Land creation)
• Preservation/Restoration and Rehabilitation of

Monumnets/old structures

• Arctic (Cold Region) /Lunar/Martian Soil Mechanics
• Forensic Engineering (Engineering aspects of legal

problems)

• Energy

Recent Trends

IIT Bombay Environmental Geomechanics Lecture No. 2 D N Singh Slide 5

IIT Bombay Environmental Geomechanics Lecture No. 2 D N Singh Slide 6

Increase in energy demands in the next decades Dependency on fossil fuels and environmental consequences. The role of geotechnology extends to all energy resources, including fossil fuels, nuclear energy and renewable sources. The complex nature of soils and their intricate behavior gain critical relevance in the context of energy geo-engineering, and classical concepts are re-visited to gain new understanding. Link between frozen ground and methane hydrate bearing sediments Carbon Sequestration ENERGY & GEOMECHANICS

IIT Bombay Environmental Geomechanics Lecture No. 2 D N Singh Slide 7

A gas hydrate consists of a water lattice in which light hydrocarbon molecules are embedded resembling dirty ice. Challenges

• Estimation and determination of thermal properties of

geomaterials (soils/sediments/rock mass) lying in between the sea floor and Bottom Simulating Reflector (BSR) surface.

• Estimation of hydraulic and gas conductivities of these

geomaterials or their representative samples.

• Assessment of seabed stability.

Subject Organization Rock Mechanics Foundations

Retaining Structures Seepage/Slopes/Dams

Soil Mechanics Geo-Mechanics Geo-Environment Geotechnical Engineering

IIT Bombay Environmental Geomechanics Lecture No. 2 D N Singh Slide 8

Engineering vis-à-vis Technology (WikiAnswers.com) Engineering: The process of putting things together for getting a desired outcome.

Similar ideas are required in the field of Geotechnical Engg.

Lecture Name: Basic Introduction

Sub-topics

• Civil Engineering
• Soil Mechanics
• Genesis of the Subject
• Scope

Soil Mechanics?

• Soil:

loose agglomeration of mineral and

• rganic material extending from the

ground surface down to the solid rock. Definition may change w.r.t. profession/professionals

• Mechanics

“a natural body, separated into horizons of different appearance and properties resulting from weathering of a parent earth material”

A Organic and leached (very Active/Instable phase) B Accumulation of fines (Active phase) “topsoil” C “subsoil” or original parent material (geological) soil (Dormant phase)

“any uncemented or weakly cemented accumulation

• f mineral particles formed by the weathering of

rocks, the void spaces between the particles containing water and/or air” (Minerals, Air, water---------A live material)

A PARTICULATE MATERIAL, REGARDLESS OF MINERAL OR ORGANIC COMPOSITION, THAT REACTS TO EXTERNAL FORCES BY THE INTERACTION BETWEEN

INDIVIDUAL PARTICLES/GRAINS