Chapter
Apr 26, 2012
Using Soil Diffusion to Design Raft Foundation on Expansive Soils
Authors: B. M. El-Garhy, W. K. Wray, and A. A. YoussefAuthor Affiliations
Publication: Advances in Unsaturated Geotechnics
Abstract
This paper describes the development of a two-dimensional soil-structure interaction model based on the finite element method for calculating the structural design parameters (i.e., moments, shears, and deflections) in a raft foundation (stiffened or constant thickness) resting on expansive soil. The model is capable of estimating the distorted mound shape by considering the soil suction distribution differences throughout the supporting soil mass and the associated volume changes (shrink/heave) with respect to time under a set of different edge conditions. The model requires only a statement of the initial soil suction conditions in the supporting expansive soil mass and the changes in the boundary conditions to predict the response of the raft foundation to these boundary condition changes. The model has been shown to yield results that agree well with reported field measurements of surface volume changes (shrink/heave).
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© 2000 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Design (by type)
- Diffusion
- Diffusion (porous media)
- Engineering fundamentals
- Engineering mechanics
- Expansive soils
- Fine-grained soils
- Foundation design
- Foundations
- Geomechanics
- Geotechnical engineering
- Raft foundations
- Soil dynamics
- Soil mechanics
- Soil properties
- Soil suction
- Soil-structure interaction
- Soils (by type)
- Structural design
- Thermodynamics
- Transport phenomena
Authors
Affiliations
B. M. El-Garhy
Lecturer, Civil Engineering Department, Faculty of Engineering, Menoufia University, Shebin El-Koom, Egypt.
W. K. Wray
F.ASCE
Professor and Dean, Russ College of Engineering and Technology, 157 Stocker Engineering and Technology Center, Ohio University, Athens, Ohio 45701-2979.
A. A. Youssef
Professor and Vice Dean, Faculty of Engineering, Menoufia University, Shebin El-Koom, Egypt.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.