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| dc.contributor.author | Bogale, Senay Amare | |
| dc.date.accessioned | 2025-03-17T07:16:49Z | |
| dc.date.available | 2025-03-17T07:16:49Z | |
| dc.date.issued | 2024-09-20 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/16619 | |
| dc.description.abstract | Slope instability is common in Northern and Central parts of Ethiopia. The topographical nature of Northern part of Ethiopia is mountainous with high slope. The most cause of slope instability in Northern parts of Ethiopian is rainfall. Roads along Abay Gorge, Dese, Wudemen, Mersa and Wurgessa areas are mostly affected due to rainfall-induced landslides. Tara Gedam is found in Northern part of Ethiopia, which was affected by rainfall-induced landslide in August 2020. Landslide in Tara Gedam area affected transportation, embankment of road, agricultural products, forest and nature of land. This study identified the source of problem and analyzing slope stability using SLOPE/W and PLAXIS 2D to give appropriate mitigations. For this study, soil samples, surveying data and rainfall condition were taken to do slope stability analysis of Tara Gedam area. Soil parameters were determined from laboratory but properties of rock and concrete were taken from different literatures. The soil sample was taken from five pits and it is classified as silty sand for pit No. 1 and 2 and elastic silt with sand for pit No. 3, 4 and 5 and characterized as poor drainage condition at all pits. A soil and rock parts were modeled using Mohr- Coulomb and Hoek-Brown models respectively. Slope failure of Tara Gedam area was analyzed with varying of rainfall duration of time and intensity using SLOPE/W and PLAXIS 2D. Using fully coupled flow-deformation analysis for PLAXIS 2D, a factor of safety was calculated based on strength reduction method and the value of factor of safety was decreased as increasing of rainfall duration of time and intensity. A factor of safety was also calculated using SLOPE/W and the value of factor of safety was decreased for increasing of intensity and duration of rainfall. The factor of safety during the rainy season shows significant reduction from its initial dry state value of 1.69 to 1.06 after 2-day rainfall duration using SLOPE/W. A factor of safety was also decreased from 1.86 at dry season to 1.00 after 2 days rainfall using PLAXIS 2D. The slope becomes stable when trench excavation and drainpipes are constructed. Keywords: Slope Stability, LEM, FEM, Rainfall and Tara Gedam area | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | Civil and Water Resource Engineering | en_US |
| dc.title | STABILITY ANALYSIS OF RAINFALL INDUCED LANDSLIDE: A CASE STUDY ON ADDIS ZEMEN-GONDER ROAD AROUND TARA GEDAM | en_US |
| dc.type | Thesis | en_US |
