Statistical Estimation Of The Compressibity Of Baghdad Cohesive Soil

Jawad Al-Taie, Abbas; S. Al-Busoda, Bushra

	Statistical Estimation Of The Compressibity Of Baghdad Cohesive Soil
Journal of Engineering
Article 1, Volume 16, Issue 4, 2010, Pages 5863-5876
Authors
Abbas Jawad Al-Taie; Bushra S. Al-Busoda
Abstract
Because of the time and expense involved in performing consolidation tests, it is often desirable to obtain approximate values of (Cc and Cr) by using other soil properties which are more easily determined. The literature contains numerous equations linking soil compressibility to its physical and index properties. As these equations are often used to obtain preliminary evaluations of (Cc) and (Cr), it is important to know the reliability of these equations. In this paper an attempt was made to estimate (Cc and Cr) of Baghdad cohesive soil from other soil properties. A number of commonly used empirical correlation equations that have been developed during the last six decades to estimate (Cc and Cr) were compiled and evaluated. The results of routine laboratory tests of a large number of databases of Baghdad soil were correlated with more sophisticated laboratory consolidation results by conducting simple and multiple regression analyses. It was concluded that the compression index of Baghdad cohesive soil cannot be estimated from Atterberg limits and the better values of compression and recompression indices of Baghdad soil can be obtained when more than one index property is used in the regression analysis.
Keywords
compression index; recompression index; Correlation; initial void ratio; natural moisture content; total unit weight; dry unit weights

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