Geo-spatial Characterization of Lithology and Geotechnical Conditions for Sustainable Urban Development in the Suez Region, Egypt
摘要
The article examines the combined geotechnical characteristics of the foundation beds in Suez City to assess their appropriateness for development projects. It also identifies the engineering issues affecting these foundation beds due to the region's geotechnical behavior and suggests suitable solutions. Geological mapping was also addressed in this research using modern remote sensing techniques such as band ratio, principal component analysis, and minimum noise fraction, which played a crucial role in delineating the spatial distribution of carbonate, clay, and iron-oxide deposits. Grain size analysis, free swell tests, Atterberg limits, chemical analysis, unconfined compressive strength, and direct shear tests were performed on sixty-five boreholes for a total of 260 samples. The ultimate soil bearing capacity (Qu) of the samples tested varies between 903 and 1576 kN/m2. The analysis of fine-grained soil at foundation levels shows that the liquid limit ranges from 60 to 100%, the plastic limit ranges from 25 to 32%, the plasticity index (PI) ranges from 26 to 67%, and the free swell ranges from 40 to 115%. Additionally, the geotechnical properties of the soil and rocks are combined with Geographic Information System (GIS) data to create a geotechnical model. This model categorizes into three classes: safe, marginal, and hazard zones. The hazard zones were obsessed with the red colour on the western, northeast, and southwest sides of the study area. Hazard zones due to the appearance of clay formations in them, which may cause much damage, especially if some foundations are located above these lenses and others on silt deposits. Therefore, this study recommended injecting and filling cracks with cement to close open joints and fractures and improve weak areas of foundation rocks to reduce problematic engineering risks within them.