Application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts- a case study of khalid-Dijo dam project, southern Ethiopia
Dam failure can occur due to foundation instability, downstream and upstream slopes instabilities. This study assesses the stability of upstream and downstream slope cuts at Khalid-Dijo irrigation dam project, which is located in Southern Ethiopia, 3 km south of Werabe town. Limit equilibrium and f...
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KeAi Communications Co. Ltd.
2025-06-01
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| Series: | Natural Hazards Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666592124000775 |
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| author | Demeke Wendim Mamaru Genetu |
| author_facet | Demeke Wendim Mamaru Genetu |
| author_sort | Demeke Wendim |
| collection | DOAJ |
| description | Dam failure can occur due to foundation instability, downstream and upstream slopes instabilities. This study assesses the stability of upstream and downstream slope cuts at Khalid-Dijo irrigation dam project, which is located in Southern Ethiopia, 3 km south of Werabe town. Limit equilibrium and finite element shear strength reduction methods are adopted. Validation of results and comparisons between those methods are carried out. The analysis considers anticipated site conditions, including static dry, static saturated, dynamic dry and dynamic saturated conditions. Slope material properties are measured from insitu, laboratory tests and used as input parameters for the analysis to obtain factor of safety and critical strength reduction factors. The properties considered in the analysis include unit weight, cohesion, angle of internal friction, poison's ratio, dilation angle and Young's modulus. The analysis indicates that the factor of safety values for limit equilibrium methods and the critical strength reduction factor for finite element method are very similar across the three slope cuts under all anticipated conditions. The lowest factor of safety and critical strength reduction factor is 1.56 and 2.07 respectively. Generally, the proposed dam project is safe against upstream and downstream slope failures. These studies suggest that maintained the average safety factor values of both methods during the design stage are crucial to avoid unnecessary risk. |
| format | Article |
| id | doaj-art-56c8ce062e2f48b2a7a3f56e0030f6ca |
| institution | Kabale University |
| issn | 2666-5921 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | KeAi Communications Co. Ltd. |
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| series | Natural Hazards Research |
| spelling | doaj-art-56c8ce062e2f48b2a7a3f56e0030f6ca2025-08-20T03:26:20ZengKeAi Communications Co. Ltd.Natural Hazards Research2666-59212025-06-015227628610.1016/j.nhres.2024.10.005Application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts- a case study of khalid-Dijo dam project, southern EthiopiaDemeke Wendim0Mamaru Genetu1School of Earth Sciences, Bahir Dar University, P.O. Box 79, Bahir Dar, EthiopiaMineral Industry Development Institute, Ministry of Mines, P.O. Box 486, Addis Ababa, Ethiopia; Corresponding author.Dam failure can occur due to foundation instability, downstream and upstream slopes instabilities. This study assesses the stability of upstream and downstream slope cuts at Khalid-Dijo irrigation dam project, which is located in Southern Ethiopia, 3 km south of Werabe town. Limit equilibrium and finite element shear strength reduction methods are adopted. Validation of results and comparisons between those methods are carried out. The analysis considers anticipated site conditions, including static dry, static saturated, dynamic dry and dynamic saturated conditions. Slope material properties are measured from insitu, laboratory tests and used as input parameters for the analysis to obtain factor of safety and critical strength reduction factors. The properties considered in the analysis include unit weight, cohesion, angle of internal friction, poison's ratio, dilation angle and Young's modulus. The analysis indicates that the factor of safety values for limit equilibrium methods and the critical strength reduction factor for finite element method are very similar across the three slope cuts under all anticipated conditions. The lowest factor of safety and critical strength reduction factor is 1.56 and 2.07 respectively. Generally, the proposed dam project is safe against upstream and downstream slope failures. These studies suggest that maintained the average safety factor values of both methods during the design stage are crucial to avoid unnecessary risk.http://www.sciencedirect.com/science/article/pii/S2666592124000775Critical strengthSafetySlip surfaceKhalid-DijoLEMFEM |
| spellingShingle | Demeke Wendim Mamaru Genetu Application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts- a case study of khalid-Dijo dam project, southern Ethiopia Natural Hazards Research Critical strength Safety Slip surface Khalid-Dijo LEM FEM |
| title | Application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts- a case study of khalid-Dijo dam project, southern Ethiopia |
| title_full | Application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts- a case study of khalid-Dijo dam project, southern Ethiopia |
| title_fullStr | Application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts- a case study of khalid-Dijo dam project, southern Ethiopia |
| title_full_unstemmed | Application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts- a case study of khalid-Dijo dam project, southern Ethiopia |
| title_short | Application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts- a case study of khalid-Dijo dam project, southern Ethiopia |
| title_sort | application of limit equilibrium and shear strength reduction techniques for stability assessment of slope cuts a case study of khalid dijo dam project southern ethiopia |
| topic | Critical strength Safety Slip surface Khalid-Dijo LEM FEM |
| url | http://www.sciencedirect.com/science/article/pii/S2666592124000775 |
| work_keys_str_mv | AT demekewendim applicationoflimitequilibriumandshearstrengthreductiontechniquesforstabilityassessmentofslopecutsacasestudyofkhaliddijodamprojectsouthernethiopia AT mamarugenetu applicationoflimitequilibriumandshearstrengthreductiontechniquesforstabilityassessmentofslopecutsacasestudyofkhaliddijodamprojectsouthernethiopia |