SHEAR STRENGTH OF SOIL & PRACTICAL VIDEOS (WITH IS CODE)

Shear Strength:-
"Shear strength is a term used in soil mechanics to describe the magnitude of the shear stress that a soil can sustain. The shear resistance of soil is a result of friction and interlocking of particles, and possibly  bonding at particle contacts".

Importance of Shear Strength of Soil:-

                In the design of foundations the evaluation of bearing capacity is dependent on the shear strength. For the design of embankments for dams, roads, pavements, excavations, levees etc. The analysis of the stability of the slope is done using shear strength.In the design of earth retaining structures like retaining walls, sheet pile coffer dams, bulks heads, and other underground structures etc.Soil failure usually occurs in the form of “shearing” along internal surface within the soil.

The shear strength of a soil mass is essentially made up of:-

          Due to the interlocking of the grains the structural resistance of the movement of the soil is very essential. An other important component is the frictional resistance between the individual soil grains at their contact point on sliding. The resistance due to the forces which hold the particles together or the cohesion.

                            

                                                                                              

VIDEO LINK OF PRACTICALS:-

     Direct Shear Test 

Unconfined Compression Test 

IS CODE LINKS:-

Direct shear test   

Determination of unconfined compressive strength

Determination of the shear strength parameters of a specimen tested in unconsolidated undrained triaxial compression without the measurement of pore water pressure

Determination of shear strength parameters of soil from consolidated undrained triaxial compression test with measurement of pore water pressure