Evaluating the Geotechnical Properties of the Soil of the Sport City, West of Tikrit

In this research, a geoengineering and chemical assessment of the soil of the sports city under construction west of the city of Tikrit are conducted with five models distributed over the entire area of the study area. This research deals with the evaluation of the physical and mechanical properties of the soil. The moisture content values range between (6.63-15.83) percent, while the specific weight values of the models range between (2.412.49). The results of the texture limits show that most of the models of the study area are silty sandy or silty sandy and that the percentage of clay is almost non-exist in most models of the study area. Therefore, the examination is culminated in the failure of all models containing the least percentage of clays and containing high percentages of sand and silt. As it is not possible to find the limits of plasticity for them, it is found from the volumetric analysis of the models (S1, S2, S3, S4, S5). For the direct shear coefficients of the soil of the study area, two sites between (S5, S4) were modeled, whose cohesion resistance reached (47-52 kN/m2) respectively, while the values of the internal friction angle reached 30 for the two models. As for the chemical analyses of the models of the study area, they show that the percentage of gypsum is high ranging between (18.93-47.79%), while the percentage of soluble salts range between (59.34-69.18%), and the pH values range between (7.44 - 7.86). All the results indicate the possibility of obtaining engineering problems in the soil such as attenuation, melting and cavitation, especially since the site is under construction, which resembles a stadium that stopped due to engineering problems with a capacity of 33 thousand spectators, two training stadiums, an Olympic swimming pool and a hotel. Therefore, there must be solutions and treatments before and after establishing this engineering facility.