The position of ground water has a significant effect on the bearing capacity of soil. Presence of water table at a depth less than the width of the foundation from the foundation bottom will reduce the bearing capacity of the soil. The bearing capacity equation incorporating the ground water table correction factors is given below.(…)
Soil Shear Strength
SHEARING STRENGTH OF SOILS & TESTS
Shear strength may be defined as the resistance to shearing stresses and a consequent tendency for shear deformation. Soil derives its shearing strength from the following resistance due to interlocking of particles frictional resistance between the individual soil grains adhesion between soil particles or cohesion PRINCIPAL PLANES AND PRINCIPAL STRESSES At a point in a(…)
DIFFERENT TYPES OF SHEAR TESTS AND DRAINAGE CONDITIONS
The following tests are used to measure the shear strength of the soil Direct shear test Triaxial compression test Unconfined compression test Vane shear test Depending upon the drainage conditions, there are three types of tests Unconsolidated-Undrained condition Consolidated – Undrained condition Consolidated-Drained condition DIRECT SHEAR TEST Apparatus The test is conducted in a soil(…)