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Abstract A geotechnical, geological and physical properties of soil in Hilla city in middle of Iraq was conducted, three boreholes over geotechnical purposes were examined. The analysis of the soil was performed in the laboratory of Babylon University / College of Science, using samples of three boreholes dug in the study area. furthermore examining the ground water impacts assessment to identify any problems that occurring in study site. The most soil at the site is a cohesive mixture of brown silty clay and clayey silt. In accordance to the unified soil classification system (USCS), the soil that cohesive is clay (CL) Clay with low plasticity. In addition to poorly graded silty sand, small graded layers of coherence-less silty sand were observed at various locations. The liquid limit (LL) of the samples is ranges from 41 to 46%, with a average of 43.3% . The plastic limit (PI)of samples ranges from 23 to 26% with average of 24.3%, and the Activity (A) values which is less than 0.75 % are classified as inactive clays. The active clays typically have activity ranges from 0.75 to 1.25% . The activity of sample greater than 1.25% are active of clay ; however, the test findings show that the majority of the sample of soil had activity less than 0.75%, indicating inactive clay. The chemical examinations of the soil revealed that the proportions of sulfates (SO 3 ) ranges from 0.26 to 1.1% with average of 0.76 %, total soluble salts (TSS) ranges from 2.16 to 8.59% with average of 5.91%, organic matter (ORG) ranges from 0.41 to 0.65% with average of0.52%, gypsum content ranges from 1.7 to 4.62% with average of 3.41%, calcium carbonates content (CaCO 3 ) ranges from 2 to 8% with average of 5.4%, PH ranges from 7.8 to 8.1 with average of 7.9 and chloride (Cl) ranges from 0.04 to 0.051% with average of 0.044 %.The groundwater table is approximately 1.70 m below the ground level. The leakage of water surrounding the foundations could cause erosion beneath the foundations.
Al-Amar et al. (Thu,) studied this question.