University of Khartoum

Numerical Analysis of Earth Channel Constructed in Expansive Soil

Numerical Analysis of Earth Channel Constructed in Expansive Soil

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Title: Numerical Analysis of Earth Channel Constructed in Expansive Soil
Author: Elarabi, Hussien
Abstract: The expansive soil can cause vertical surface movements that are restrained by the structure that rest on it. As an example, an open channel that was constructed on a sub grade of expansive dry clay is considered. It is assumed that after construction of the channel the ground is exposed to rain period. The moisture then migrates through the clay according to moisture diffusion equations derived from experimental data and causing volume expansions there, which in turn lead to a vertical heave as well as horizontal displacement of the sides of the constructed channel. The viscoplastic finite element program developed in this work is applied to predict surface heave or settlement caused by swelling ground acting on a channel. The implemented elasto-viscoplastic law in the program takes into account the time-dependency of swelling. The required results are the displacements and stresses in the surrounding zone of the channel and of the channel structure itself. The computational results of the developed model are presented in this paper to show the effect of expansive soils on channels erected in it.
Description: Numerical Analysis of Earth Channel Constructed in Expansive Soil
URI: http://hdl.handle.net/123456789/5068
Date: 2009


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