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Soil mechanics is a branch of mechanics that describes the behavior of soil. Soil consists of a heterogeneous combination of fluids & particles but soil may contain organic liquids, solids, gasses & other matter. It is used to examine the deformations of and flow of fluids within natural & artificial structures that are made of soil. Principles of soil mechanics are used in engineering geology, coastal engineering, agricultural engineering, geophysical engineering, hydrology & soil physics. The shear strength of soils derived from friction between particles & interlocking.
Why Soil problems are UNIQUE?
- Soil does not possess a linear & unique stress - strain relationship.
- Soil behavior depends on pressure, time & environment.
- The soil at every location is different
The mass of soil involved is underground & can’t be seen but must be evaluated on basis of small samples obtained from isolated locations. Soils are very sensitive to disturbance from sampling and the behavior measured by a laboratory test.
- Soil is composed of microscopic or macroscopic discrete particles, which are not strongly bonded together as crystals.
- Soil particles are relatively free to move with respect to another, less fluent than the movement of fluid particles
- Particulate system pertains to a system of particles, and the science dealing with the stress-strain behavior of soils is referred as Particulate Mechanics
- Nature of Soil Deformation,Contact forces develop due to applied forces,Contact forces are resolved into normal N and tangential T forces
Soil mechanics is related to the study of soil which is the mixture of minerals, gases, organic matter, liquids and countless organisms which together support life on Earth. Soil is considered to be the “Skin of the Earth”. It includes widely different materials like gravels, sand, silts and clays. The type of soil depend upon the size of particles i.e. loamy soil, sandy soil etc and on the color of the soil i.e. black soil, yellow soil etc. Soil Mechanics is defined as the branch of engineering science which enables an engineer to know theoretically or experimentally the behavior of soil under the action of: Loads (Static or dynamic), gravitational forces, water and temperature. Simply speaking it is the knowledge of engineering science, which deals with properties, behavior and performance of soil as a construction material or foundation support. According to Terzaghi (1948), the soil mechanics is the application of laws of mechanics and hydraulics to engineering problems dealing with sediments and other unconsolidated accumulations of solid particles produced by the mechanical and chemical disintegration of rocks regardless of whether or not they contain an admixture of organic constituent. Soil mechanics is a subject area of Civil engineering which involves the study of soil and its behavior and its application as a material of engineering. It is the resultant application of laws of hydraulics and mechanics in engineering problems which deal with unconsolidated accumulations (solid particles)and sediments. The major topics in study of soil mechanics include soil classification and compaction, soil water and water flow, stress distribution and settlement, shear strength, slope stability, static pressure in water etc.
Our Soil Mechanics Assignment help tutors help with topics like Engineering properties, Basic characteristics of soils; soil classification seepage; effective stress; soil compaction.
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Some of the homework help topics include :
- Mechanical behavior of soil material ,Consolidation ,Shear strength ,Basic characteristics of soils ,Soil classification,Applications in geotechnical ,Compaction ,Permeability,Compressibility ,Seepage,Effective stress ,Soil compaction ,Soil testing techniques ,Soil mechanics ,Grain size, Shape, Angularity ,Geology of soils ,Atterberg limits ,Earth dams ,Phase diagrams ,Consolidation theory, Fundamental description of soils on the rev scale, The characterisation and the classification of soils, Fundamental principles, Flow of water in porous media , Hydraulic head based on the equation of bernoulli, Determination of hydraulic conductivity and flow nets, Fundamental mechanical concepts , Effective stress concept, Strength of soils, Consolidation, Settlement and testing procedures, Soil formation and identification
- Granular and cohesive soils, Flow of water in soils, Stress distribution, Consolidation, Analysis of deformation , Strength of soils, Stress path dependent behavior, Slope stability, Multiphase nature of soils, Volume relationships, Void ratio, Porosity, Degree of saturation, Mass relationships, Water content, Bulk density, Solid density, Dry density, Unit weight submerged unit weight specific gravity relative density soil phase diagram soil, Physical weathering, Chemical weathering, Residual soils, Transported soils, Clay soil, Soil description , Soil classification,Material characteristics of a soil, Mass characteristics of a soil, Particle size analysis, Grading curves, Effective grain size , Uniformity coefficient, Limit tests , Plasticity chart, Engineering applications of the atterberg limits, Principle of effective stress, Physical interpretation
- Total vertical stress, Effective vertical stress , Pore water pressure, Total stresses, Effective stresses, Partially saturated soils, Capillary head, Geostatic stress condition, Lateral stress coefficient, Horizontal stresses , Vertical stresses, Normal , Overconsolidation, Ko condition, Stresses in two dimensions, Mohr diagram method of stress analysis, Total stress mohr circles, Effective stress mohr circles, Total head, Pressure head, Darcy law, Hydraulic gradient, Permeability coefficient k, Typical values of k, Hazen equation , Constant head permeameter , Falling head permeameter,Field methods of measurement, Well pumping test, One dimensional seepage, Effective stress under seepage, Critical hydraulic gradient, Quick sand phenomenon, Piping failure, Two dimensional seepage, Steady state flow
- Transient flow, Assumptions of differential equation for 2d seepage, Derivation of differential equation for 2d seepage, Flow net construction , Uses in the solution of geotechnical seepage problems, Compaction, Soil properties , Air voids, Dry density, Phase relationships, Light compaction, Heavy compaction, Vibratory compaction, Field density determination, Sand replacement, Core cutter, Optimum moisture content , Maximum dry density, Smooth wheeled rollers, Pneumatic tyred rollers, Vibratory compactors, Sheepsfoot rollers, Description of soil, Classification of soil, Analysis of stress in soil, Soil behavior , Characteristics of water flow through soil, Consolidation settlement , Shear strength, Development of earth pressure theory, Application of earth pressure theory,Unified Soil Classification System ,AASHTO Classification System ,Compaction ,Soil structure ,Geostatic stresses ,Permeability ,Engineering practice,Soil classification
Help for complex topics like :
- Settlement analysis , Shear strength and failure criteria ,Applications of soil mechanics ,Lateral pressures and retaining structures ,Bearing capacity of foundations ,Slopes and embankments.,1-d flow,Quick conditions ,2-d flow,Settlements,Stresses due to surface loads ,Settlement calculations ,Consolidation test data reduction ,Settlement on sand ,Mohr circle
- Shear strength – direct shear test ,Shear strength – triaxial test ,Bearing capacity ,Piles walls,Basics of physical geology-the rock cycle, Plate tectonics, Origin, Transportation, Deposition of soils, The use of phase diagrams to calculate geostatic stresses,Classify soils by the uscs and aashto systems ,To make calculations on the 1-d and 2-d flow of water through soils
- The fundamentals of soil compressibility and strength ,The basics of settlement, Bearing capacity, Slope stability, Earth pressure and pile foundation design , The procedures for performing the standard soil laboratory tests,Soil mechanics, Soil testing techniques;consolidation theory and settlement analysis,Shear strength and failure criteria,Applications of soil mechanics in engineering practice,lateral pressures and retaining structures, bearing capacity of foundations, slopes and embankments
- Classification ,Particles, water, air ,Stresses in soils ,Stresses in a layer,Darcy’s law ,Permeability ,Groundwater flow ,Floatation ,Flow net,Flow towards wells ,Stress strain relations ,Tangent-moduli ,One-dimensional compression ,Consolidation ,Analytical solution,Numerical solution ,Consolidation coefficient ,Secular effect,Shear strength,Triaxial test ,Shear test ,Cell test,Pore pressures ,Undrained behaviour of soils ,Stress paths ,Elastic stresses and deformations ,Boussinesq ,Newmark ,Flamant ,Deformation of layered soil ,Lateral stresses in soils ,Rankine ,Coulomb ,lateral earth pressure ,Blum ,Sheet pile wall in layered soil,Limit analysis ,Strip footing ,Prandtl ,Limit theorems for frictional materials ,Brinch Hansen ,Vertical slope in cohesive material ,Stability of infinite slope ,Slope stability ,Soil exploration ,Model tests ,Pile foundations.
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Few Topics are:
- testing and identification of soils
- Physical, chemical and hydraulic characteristics
- shear strength
- deformation and stability problems,
- earth dams,
- retaining walls
- slopes and landfills
Complex Topics are:
- soil property measurement
- system characteristics on soil sediment
- pinhole test for identifying dispersive clays
- triaxial compression
- triaxial extension with porewater measurement
- cyclic triaxial test
- permeability with back pressure determination of critical void ratio