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10 Feb 2023 · The undrained shear strength of soil is one of the critical parameters that the engineers use to predict the stability of slopes, foundations, and other structures built on or in soil. In this blog post, I will discuss undrained shear strength, how it works, why it’s essential, and how to evaluate it.
18 Mei 2018 · Compared to drained strength (c', \phi'), undrained shear strength is often much easier and cheaper to measure. It can be derived from an unconfined compression test (UU triaxial), vane shear test or simply using a pocket penetrometer.
The drained shear strength is the shear strength of the soil when pore fluid pressures, generated during the course of shearing the soil, are able to dissipate during shearing. It also applies where no pore water exists in the soil (the soil is dry) and hence pore fluid pressures are negligible.
The drained shear strength is the shear strength of the soil when pore fluid pressures, generated during the course of shearing the soil, are able to dissipate during shearing. It also applies where no pore water exists in the soil (the soil is dry) and hence pore fluid pressures are negligible.
For soils there are three important strength criteria: the correct criterion depends on the nature of the soil and on whether the loading is drained or undrained. In General, course grained soils will "drain" very quickly (in engineering terms) following loading.
shear strength (Equation 12.4) is most useful. For partially, drained and undrained conditions, the evaluation of excess pore pressure is often diffi-cult. In some cases, a total-stress description of shear strength may be used. One important case is the undrained loading of saturated soils, for which the undrained shear strength (s = s) can be ...
• In the short term, we would use an undrained shear strength model to determine whether or not shear failure (or a slope failure) would occur. • In the long term, we would use a drained shear strength model to determine
