Study the Physical Characteristics and Severity to Collapse of Collapsible Soils: A Case of Turmi – Omo Road Project
dc.contributor.advisor | Samuel, Tadesse (PhD) | |
dc.contributor.author | Endalk, Fentie | |
dc.date.accessioned | 2020-11-25T05:36:57Z | |
dc.date.accessioned | 2023-11-28T13:46:13Z | |
dc.date.available | 2020-11-25T05:36:57Z | |
dc.date.available | 2023-11-28T13:46:13Z | |
dc.date.issued | 2019-11 | |
dc.description.abstract | Collapsible soils present significant geotechnical and structural engineering challenges for different types of constructions. These soils suffer volume changes and collapse deformation upon wetting. Situations in arid and semi-arid climates favor the formation of the most problematic collapsible soils. Almost all naturally occurring collapsible soil deposits are debris flows, rapid alluvial depositions, and wind-blown deposits (loess). If unrecognized, it may cause pumps or deep sinkholes, which leads to traffic accidents and loss of lives. Hence, this research was conducted to investigate the physical properties and the severity of collapse of the soils found in the road project of Turmi - Omo. To achieve the objective of this research, papers, journals, actual design reports, contract document of the project and different books have been scrutinized under literature review, samples from the research area were collected from different test pits below the natural ground level, and then laboratory tests for index properties and oedometer tests have been carried out using disturbed and remolded samples. From the test results the subgrade soil classes fall in A-4, A-6 and A-7-6 according to AASHTO classification. In addition, according to USCS the soils under investigation are classified as ML (group of inorganic silt of medium compressibility). The evaluation of susceptibility of soil to collapse was measured by performing single oedometer tests on samples remolded at their in-situ densities and at maximum dry densities. The oedometer test results at the investigated depth of soil showed that, the collapse potential of samples remolded at their in-situ densities and natural moisture contents is within the range of 1.49 % to 5.93 % and that indicates that the severity of collapse is slight to moderate. And also, the collapse potential of samples remolded at their maximum dry densities and optimum moisture contents is within the range of 0.19 % to 0.495 % and thus the severity of collapse is very slight. Though the results indicated that the severity to collapse is very slight, the soil in the investigated section is collapsible and the collapse potential could be significantly reduced by compaction during construction. | en_US |
dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/23536 | |
dc.language.iso | en_US | en_US |
dc.publisher | Addis Ababa University | en_US |
dc.subject | Turmi – Omo Road Project | en_US |
dc.subject | Physical Characteristics | en_US |
dc.subject | Collapsible Soils | en_US |
dc.subject | Severity | en_US |
dc.title | Study the Physical Characteristics and Severity to Collapse of Collapsible Soils: A Case of Turmi – Omo Road Project | en_US |
dc.type | Thesis | en_US |