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Coursework example - Geotechnical Properties & Construction Methods
Engineering and Construction
Pages 8 (2008 words)
QUESTION 1 Before starting any building or civil engineering work, a ground investigation is very important. It allows for a better understanding of the type and quality of soil, bearing in mind that both parts of the structure, superstructure and substructure, are supported by the soil beneath…
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At this stage, Engineer will be collecting data from Geological survey, topographic maps, photogeology (aerial) , digital data, borehole records, national survey, mining records in order to understand the geology, compressive soils, drift thickness, landslides, soluble rocks, made ground, etc.… The main importance of the desk study is to understand the geological condition of the site in order to analyse its implication during any stage of the planned engineering activity. This means that for a difficult ground condition, either the foundation design has to be adequate or a reduction of the actual superstructure loads has to be considered. In the given site, the points below can be listed as evidence of desk study as an element of site investigation: Borehole data: the presence of made ground and building debris with patches of old oil spillages; this has been found at a thickness of 1m above the ground level. Soft silt up to a depth of 10m then compacted sand and gravel at 18m. This is the exact composition of the soil beneath and will allow for adequate selection of foundation design. Knowing that up to a depth of1m below the ground level, the soil has almost no strength. This layer will have no importance in the overall bearing capacity of the soil. ...
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