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  2. Shear strength (soil) - Wikipedia

    en.wikipedia.org/wiki/Shear_strength_(soil)

    Typical stress strain curve for a drained dilatant soil. 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 cementation or bonding of particle contac

  3. Cohesion (geology) - Wikipedia

    en.wikipedia.org/wiki/Cohesion_(geology)

    Cohesion is the component of shear strength of a rock or soil that is independent of interparticle friction. In soils, true cohesion is caused by following: Electrostatic forces in stiff overconsolidated clays (which may be lost through weathering) Cementing by Fe 2 O 3, Ca CO 3, Na Cl, etc. There can also be apparent cohesion. This is caused by:

  4. Soil mechanics - Wikipedia

    en.wikipedia.org/wiki/Soil_mechanics

    However, if the water table is sloping or there is a perched water table as indicated in the accompanying sketch, then seepage will occur. For steady state seepage, the seepage velocities are not varying with time. If the water tables are changing levels with time, or if the soil is in the process of consolidation, then steady state conditions ...

  5. Mohr–Coulomb theory - Wikipedia

    en.wikipedia.org/wiki/Mohr–Coulomb_theory

    Typical values of cohesion and angle of internal friction [ edit ] Cohesion (alternatively called the cohesive strength ) and friction angle values for rocks and some common soils are listed in the tables below.

  6. Direct shear test - Wikipedia

    en.wikipedia.org/wiki/Direct_shear_test

    A direct shear test is a laboratory or field test used by geotechnical engineers to measure the shear strength properties of soil [1] [2] or rock [2] material, or of discontinuities in soil or rock masses. [2] [3] The U.S. and U.K. standards defining how the test should be performed are ASTM D 3080, AASHTO T236 and BS 1377-7:1990, respectively.

  7. Angle of repose - Wikipedia

    en.wikipedia.org/wiki/Angle_of_repose

    As the roundness of materials increases, the angle of repose decreases since there is less friction between the soil grains. [10] When the angle of repose is exceeded, mass wasting and rockfall can occur. It is important for many civil and geotechnical engineers to know the angle of repose to avoid structural and natural disasters. As a result ...

  8. Dilatancy (granular material) - Wikipedia

    en.wikipedia.org/wiki/Dilatancy_(granular_material)

    The relationship between dilation and internal friction is typically illustrated by the sawtooth model of dilatancy where the angle of dilation is analogous to the angle made by the teeth to the horizontal. Such a model can be used to infer that the observed friction angle is equal to the dilation angle plus the friction angle for zero dilation.

  9. Slope stability analysis - Wikipedia

    en.wikipedia.org/wiki/Slope_stability_analysis

    The Swedish Slip Circle method assumes that the friction angle of the soil or rock is equal to zero, i.e., = ′. In other words, when friction angle is considered to be zero, the effective stress term goes to zero, thus equating the shear strength to the cohesion parameter of the given soil.