Investigation into Some of The Engineering Properties of Soils Found in Woliso Town
| dc.contributor.advisor | Tadesse, Samuel (PhD) | |
| dc.contributor.author | Haile, Biruk | |
| dc.date.accessioned | 2018-06-21T06:18:23Z | |
| dc.date.accessioned | 2023-11-11T12:51:26Z | |
| dc.date.available | 2018-06-21T06:18:23Z | |
| dc.date.available | 2023-11-11T12:51:26Z | |
| dc.date.issued | 2014-12 | |
| dc.description.abstract | Investigation of the ground conditions is used for the economical design of the sub structural elements. It is also necessary to obtain sufficient information on type, characteristics and distributions of soil and rock underlying a site for proposed structures. The overall aim of this study is to come up with reliable results for some of the engineering properties of soils found in Woliso town in order to understand clearly the nature of the soil so that suitable foundation can be recommended for better design and construction of civil engineering structures in the town. To achieve these objective disturbed and undisturbed samples from different parts of the town were collected and laboratory tests were done on the collected samples. The undisturbed samples were taken from the test pits by mechanically driving a Shelby tube. For all tests the apparatus and the procedures used for analysis were done according to American Society for Testing Materials (ASTM) standard. The natural moisture content of soil in the study area ranges from 25.5% - 66%. Expansive and non-expansive soils were investigated in the study area. The average specific gravity of the expansive soils is 2.68 and a non-expansive soil is 2.74. The grain size analysis test result showed that the dominant proportion of soil particle in the research area is clay. For expansive soils the clay content ranging from 55 - 80%, silt ranging from 13.8 – 28.2%, sand ranging from 4.5 – 9.7% and gravel ranging from 0.1 – 11.4% and for non-expansive soils the clay content ranging from 42.5 – 85%, silt ranging from 12.8 – 51.1%, sand ranging from 2.2 – 7.5% and gravel ranging from 0 – 0.4% . Atterberg Limit test results in the research area showed a liquid limit of expansive soils ranging from 70.5 - 126%, plastic limit ranging from 31.2 - 44% and plasticity index ranging from 39.3 – 81.7% and for non-expansive soils the liquid limit ranging from 56.2 – 61.1%, plastic limit from 30.3 – 34.4% and plasticity index ranging from 26.2 – 29.7%. According to Unified Soil Classification System, expansive and non-expansive soils in the study area are categorized as highly plastic inorganic clay and silt soils respectively. The unconfined compressive strength of the soils in the study area ranges from 75 -540kN/m2 and undrained shear strength ranges from 37.5 - 270 kN/m2. Unconfined compressive strengths show that the approximate consistencies of the soil ranges from medium to hard. One-dimensional consolidation test showed that the area under investigation is over consolidated in its natural state, have compression index ranging from 0.11-0.62, coefficient of consolidation from 1.25-17.17 (x10-3)cm2/min, coefficient of permeability from 0.15-10.63 (x10-8 cm/sec). | en_US |
| dc.description.sponsorship | Addis Ababa University | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/2429 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Geotechnical Engineering | en_US |
| dc.title | Investigation into Some of The Engineering Properties of Soils Found in Woliso Town | en_US |
| dc.type | Thesis | en_US |