Geohazard Analysis and Engineering Geological Study, Addis Ababa-Dukum Road Section, Central Ethiopia
| dc.contributor.advisor | Kumar, Tarun (PhD) | |
| dc.contributor.author | Shelemo, Esayas | |
| dc.date.accessioned | 2020-11-02T06:36:11Z | |
| dc.date.accessioned | 2023-11-09T14:11:22Z | |
| dc.date.available | 2020-11-02T06:36:11Z | |
| dc.date.available | 2023-11-09T14:11:22Z | |
| dc.date.issued | 2013-06-06 | |
| dc.description.abstract | Sub grade soils and materials characterizations are the main parameter for flexible pavement both in the design and construction phases. Expansive soils in construction sites do have significant influence on planning, structural design, construction and maintenance costs, performance and engineering life of roads and highways. They are susceptible to considerable volume changes in response to fluctuations in groundwater table and moisture content following seasonal climatic variations. This property can cause severe damages to infrastructure unless proper measures are taken in the design and construction phases. Identification of expansive soils and characterization of their anticipated behavior is thus important for pavement structure & drainage design, and estimating the cost, mitigating their undesirable properties. Hence to mitigate the possible damages, sub grade soils and materials characterization have been conducted. The sub grade soils and materials characterization is conducted at Addis-Ababa-Dukum road section. It is also one of the main work of engineering geologist or geotechnical engineer to analyze geohazard in project site before planning, structural design and construction. The geohazard analysis is also conducted along Addis Ababa-Dukum road section. The main objectives of the study were: (1) To classify the sub grade soils (2) To propose remedial measures for the unsuitable part of the sub grade soils (3) To analyze geohazard in the study area and (4) To propose remedial measure for the geohazard that exists To achieve these objectives, representative sub grade soils samples have been taken at a depth of one meter, which is the depth at which most civil engineering structure are constructed and tests are also conducted for the determination of Atterberg limits, grading, MDD and OMC, CBR and swell values. To analyze geohazard in the study area detailed literature review was done. Interpretations have been made with the data obtained from laboratory test, supported by previous studies and researches. In addition, geological data have also been incorporated. From the laboratory investigation, it has been concluded that 100% of the sub grade soils are found to have low bearing potential and high swell potential. Mechanical and chemical stabilization methods have been proposed for the sub-grade soil. Also design of the pavement has been forwarded as one method of remedial measure based on the sub-grade characteristics. The geohazard analysis in the study area showed that the main geohazard that exist in the study area is seismic hazard. Seismic design of bridge along the study area has been forwarded. Based on the results and findings, certain recommendations have also been given. These recommendations are removal and replacement, chemical treatment, rock fill with geo textiles and underground and side drains, seismic design of bridges | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/22982 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Geohazard Analysis | en_US |
| dc.subject | Engineering Geological | en_US |
| dc.subject | Study | en_US |
| dc.subject | Addis Ababa-Dukum Road Section | en_US |
| dc.subject | Central Ethiopia | en_US |
| dc.title | Geohazard Analysis and Engineering Geological Study, Addis Ababa-Dukum Road Section, Central Ethiopia | en_US |
| dc.type | Thesis | en_US |