GEOTECHNICAL STUDY AT 15 MAY CITY, CAIRO, EGYPT
The present study deals with the Geotechnical Investigation to get information a foundation and determine Soil and Rocks characteristics. From the In-situ geotechnical test and laboratory analysis were classified Rock Quality % to Poor And increasing the results at northern, northwestern and southeastern parts of the area ,while the decreasing of values at southwestern side. The Rocks Classification according to unconfined compressive Strength (Qu) are medium weak to depth between 1 to 4 meter
... hile are medium weak to medium hard at depth of 8 meters to 12 meters. The Soil classification according U.S.C.S. in A-line Chart between inorganic silts and very fine sands, with slight plasticity to inorganic clays of low to medium plasticity ,silty clays , lean clays. The chemical analysis used to determine the degree of aggressive for Soil , ranging between non-aggressive and moderately aggressive. The main Geotechnical problem based on the history of geology for the area and the present geotechnical study is that the main formation of the area is limestone, with some cavity, cracks and lenses of clay, probably occurring on engineering constructions especially with seepage of water.