Prediction of some geotechnical properties of deltaic clays: using regression analysis models
M. M. Shahien; Waleed Abdelmoghny Metwaly Ogila;
Abstract
Establishment of any engineering structure on a compressible clay leads to
settlement and/or failure through this clay. The amount of this settlement is
controlled mainly by the compressibility parameters, while the failure by the
undrained strength. The measuring of compressibility parameters and undrained
strength are expensive, cumbersome, and time-consuming; therefore several
attempts have been made to predict these geotechnical parameters by using simple,
cheap, and time-saving index properties of the soil. In this study, the performance of
applying empirical equations for the estimation of these critical geotechnical
parameters was assessed by using a database including 551 undisturbed samples of
the Nile Delta clay. The regression analysis results depict statistically moderate to
strong correlations exist between both compression index and recompression index
and the bulk density, Atterberg limits, initial void ratio, and effective overburden
pressure. The precompression stress, overconsolidation ratio, and undrained shear
strength parameters have no remarkable correlations with these index properties,
except the effective overburden pressure parameter that has moderate to strong
correlations with these properties. The compressibility and strength parameters
depend on the in-situ effective stress, stress during geological history, diagenesis and
cementation process, mineralogy, microstructure, and texture of clay, therefore
they provide meaningful relationships. The developed empirical equations in this
study, which derived from various linear and multi-variables regression models, are
reliable and capable to predict the geotechnical design parameters with high
prediction performance.
settlement and/or failure through this clay. The amount of this settlement is
controlled mainly by the compressibility parameters, while the failure by the
undrained strength. The measuring of compressibility parameters and undrained
strength are expensive, cumbersome, and time-consuming; therefore several
attempts have been made to predict these geotechnical parameters by using simple,
cheap, and time-saving index properties of the soil. In this study, the performance of
applying empirical equations for the estimation of these critical geotechnical
parameters was assessed by using a database including 551 undisturbed samples of
the Nile Delta clay. The regression analysis results depict statistically moderate to
strong correlations exist between both compression index and recompression index
and the bulk density, Atterberg limits, initial void ratio, and effective overburden
pressure. The precompression stress, overconsolidation ratio, and undrained shear
strength parameters have no remarkable correlations with these index properties,
except the effective overburden pressure parameter that has moderate to strong
correlations with these properties. The compressibility and strength parameters
depend on the in-situ effective stress, stress during geological history, diagenesis and
cementation process, mineralogy, microstructure, and texture of clay, therefore
they provide meaningful relationships. The developed empirical equations in this
study, which derived from various linear and multi-variables regression models, are
reliable and capable to predict the geotechnical design parameters with high
prediction performance.
Other data
Title | Prediction of some geotechnical properties of deltaic clays: using regression analysis models | Authors | M. M. Shahien; Waleed Abdelmoghny Metwaly Ogila | Keywords | Deltaic clay;Regression analysis;Soil parameters;Shear strength;Compressibility parameters | Issue Date | 1-Jul-2021 | Publisher | Faculty of Science, Ain Shams University | Journal | Egyptian Journal of Pure and Applied Science | Volume | 59 | Issue | 2 | Start page | 36 | End page | 62 | DOI | 10.21608/ejaps.2022.107783.1012 |
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