Preconsolidating

13-Oct-2019 07:11

There are various methods for determining the preconsolidation pressure from lab data.

The data is usually arranged on a semilog plot of the effective stress (frequently represented as σ' The preconsolidation pressure can be estimated in a number of different ways but not measured directly.

It is useful to know the range of expected values depending on the type of soil being analyzed.

For example, in samples with natural moisture content at the liquid limit (liquidity index of 1), preconsolidation ranges between about 0.1 and 0.8 tsf, depending on soil sensitivity (defined as the ratio of undisturbed peak undrained shear strength to totally remolded undrained shear strength). used this method to calculate the preconsolidation pressure of 139 undisturbed soil samples to generate preconsolidation pressure maps of the Vega Baja of the Segura (Spain).

These tests can be costly due to expensive equipment and the long period of time they require.Special incremental loading oedometer tests and CRS oedometer tests were performed at different strain rates; isotropic and anisotropic triaxial compression tests followed by undrained shear tests were all carried out on specimens taken from 4.8 to 5.8 m.All these tests were performed under a constant temperature, varying from 10°C to 50°C, in order to study the viscous behaviour of the clay.This breakdown can cause a number of different things depending on the type of soil and its geologic history.Preconsolidation pressure cannot be measured directly, but can be estimated using a number of different strategies.

These tests can be costly due to expensive equipment and the long period of time they require.Special incremental loading oedometer tests and CRS oedometer tests were performed at different strain rates; isotropic and anisotropic triaxial compression tests followed by undrained shear tests were all carried out on specimens taken from 4.8 to 5.8 m.All these tests were performed under a constant temperature, varying from 10°C to 50°C, in order to study the viscous behaviour of the clay.This breakdown can cause a number of different things depending on the type of soil and its geologic history.Preconsolidation pressure cannot be measured directly, but can be estimated using a number of different strategies.Various different factors can cause a soil to approach its preconsolidation pressure: Preconsolidation pressure is used in many calculations of soil properties essential for structural analysis and soil mechanics.