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Determination of the effective stress parameter in unsaturated soils: an analytical formulation based on the soil water retention properties

Publish Year: 1394
Type: Conference paper
Language: English
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ICCE10_0496

Index date: 10 July 2015

Determination of the effective stress parameter in unsaturated soils: an analytical formulation based on the soil water retention properties abstract

Modeling the hydro-mechanical behavior of unsaturated soils is of crucial importance for many geotechnical engineering projects which span from the evaluation of the earth dams to the risk analysis of rainfall induced landslides. To better understand the hydro-mechanical behavior of unsaturated soils, the most accurate and practical formulas for the stress measures of such media are required. The determination of the stress measures such as the effective stress has, thus, faced much attention in the recent decades. In this regard, the effective stress parameter is a key parameter for which many empirical equations have been introduced in the literature. In this study, an analytical formulation for the effective stress parameter has been introduced. The proposed approach employs the principles of thermodynamics to formulate the effective stress parameter based on the soil water retention properties. Last but not the least, it accounts for the contribution of the capillary forces which has, commonly, been overlooked in the previous studies.

Determination of the effective stress parameter in unsaturated soils: an analytical formulation based on the soil water retention properties Keywords:

Determination of the effective stress parameter in unsaturated soils: an analytical formulation based on the soil water retention properties authors

Ehsan Nikooee

Earth Sciences Department, Utrecht University, Utrecht, the Netherlands Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran

S. Majid Hassanizadeh

Earth Sciences Department, Utrecht University, Utrecht, the Netherlands

Ghassem Habibagahi

Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran

Arsalan Ghahramani

Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran