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Soil Mechanics Introduction and Definition

Soil mechanics is defined as the application of the laws and principles of mechanics and hydraulics to engineering problems dealing with soil as an engineering material. Soil has many different meanings, depending on the field of study. To a geotechnical engineer, soil has a much broader meaning and can include not only agronomic material, but also broken-up fragments of rock, volcanic ash, alluvium, Aeolian sand, glacial material, and any other residual or transported product of rock weathering.

As the name Soil Mechanics implies the subject is concerned with the deformation and strength of bodies of soil.  It deals with the mechanical properties of the soil materials and with the application of the knowledge of these properties to engineering problems.  In particular it is concerned with the interaction of structures with their foundation material.  This includes both conventional structures and also structures such as earth dams, embankments and roads which are their-selves made of soil.


soil mechanics Download Full course pdf (Scanned Notes) - High Quality (42 MB) soil mechanics lectures notes Download Full in pdf (Scanned Notes) - Low Quality (4.09 MB)

Soil Constituents its types and properties Soil Constituents its types and properties

Atterberg's Limits Atterberg's Limits

Constituents of Soil

Sand, Silt, Gravel, Stones

Types of Soil

Dry, Saturated, Partially saturated, Coarse, Fine, Organic, Gravel, Sand, Clay, Silt, Boulders, Cobbels, Peat


Voids ratio, Porosity, Degree of Saturation, Air Content, Water Content, Unit weight, Bulk unit weight, Specific Gravity, saturated unit weight

  1. Liquid limit | Determine Liquid Limit of soil

  2. Plastic limit | Determine Plastic Limit of soil

  3. Shrinkage limit

  4. Liquidity index

  5. Flow index

  6. Toughness index

Sieve Analysis Sieve Analysis & Particle Sizing Graphs

Classification of Soil Classification of Soil

The grain-size characteristics of soils that are predominantly coarse grained are evaluated by a sieve analysis

A nest of sieves is prepared by stacking sieves one above the other with the largest opening at the top followed by sieves of successively smaller openings and a catch pan at the bottom of all the sieves
read more [Read More]

There are two soil classification systems in common use for engineering purposes.
... read more [Read More]

  2. Unified Classification System
  3. MIT Classification System

Earth Filled Dams Earth Filled Dams

Compaction of soil, its uses and effects Compaction of soil, its uses and effects

Those dams in which the dam body is made up of materials from the earth (Soil) are called earth filled dams..... read more [Read More]

Types of earth filled dams

  1. Rolled filled dams
  2. Hydraulic dams
  3. Semi Hydraulic dams

Compaction is the application of mechanical energy to a soil to rearrange the particles and reduce the void ratio.. read more [Read More]

  1. Purpose of compaction
  2. Factors affecting compaction
Stresses in soil mass Geo-Technical Engineering and Foundation Earth Pressure Earth Pressure

GeoTechnical Engineering deals with effect of soil properties on foundations, the behaviour of different types of foundations......... read more [Read More]

  1. Why do we use foundations in buildings
  2. Requirements of foundation
  3. Design procedure & Steps
  4. Types
  1. Pressure at rest
  2. Active earth pressure
  3. Passive earth pressure
  4. Co efficients of earth pressure

Civil Engineering Dams Civil Engineering Dams

Soil Mechanics Ebooks Soil Mechanics Ebooks

Those dams which are constructed mainly of soil materials is called earth dam. Earth fill dams may be of three types: Rolled filled dams, Hydraulic filled dams, Semi Hydraulic dams... read more [Read More] Collection of downloadable books and ebooks about soil mechanics, geotechnical engineering, geology & foundation engineering... read more [Read More]
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