Adane, Wuletaw (2007) Appropriate Solution for Impevious Core of Embankment Dams to Be Constructed Using Highly Plastic Soils. Masters thesis, Addis Ababa University.
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PDF (Appropriate Solution for Impevious Core of Embankment Dams to Be Constructed Using Highly Plastic Soils)
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Abstract
For a long time, highly plastic clays (CH soils) have been used extensively as impervious core material for many zoned embankment dams all over the world. In Ethiopia several dams are currently under construction (e.g. Tendaho dam) and more are planned to be constructed (e.g. Ribb, Megech, Meqa dams, etc.) using predominantly CH soils as the most available impervious core material. Nevertheless, several problems are associated with CH soils. The most common problems include high compressibility when saturated, potential for high swelling and cracking, slow rate of construction for safe dissipation of pore water pressure, large difference in stiffness with the surrounding shell materials leading to differential deformation, difficulty in moisture control during construction, and requiring extremely fine filters that can not be easily obtained or produced on site. In this thesis, a study has been conducted on the effects of blending the CH soils with naturally available granular materials using several laboratory tests. The laboratory tests include Atterberg limits, permeability, compaction, 1D-consolidation, and triaxial compression tests on samples collected from Tendaho dam site. The test results clearly reveal that blending with granular soils greatly improves the physical and mechanical behaviours of the CH soils. Based on the test results, an appropriate blending ratio has been recommended for the CH soils used in Tendaho dam.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Civil Engineering |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TD Environmental technology. Sanitary engineering T Technology > TG Bridge engineering T Technology > TH Building construction |
| Divisions: | Africana |
| Depositing User: | Andriamparany Edilbert RANOARIVONY |
| Date Deposited: | 04 Jul 2018 08:51 |
| Last Modified: | 04 Jul 2018 08:51 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/6566 |
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