![]() The database served to assess inherent variability, measurement error, and transformation error more consistently. To offer avenues for improving the current values, a database contains geotechnical investigation results for 5087 boreholes collected from Egypt, UAE, Iraq, and Indonesia were created. The current commonly used transformation error values have shortcomings that warrant the need for further research. The correlated shear strength parameter deviates from its actual value, by a transformation error, causing larger uncertainty that affects the overall design. The main reasons for using these correlations that direct measurements are costly, time consuming, and not always applicable. Shear strength can be measured directly in the field or in the laboratory, however many empirical correlations were developed to predict shear strength from simple basic and index properties of soil. ![]() Shear strength is responsible for soil ability to withstand applied loads and considered the most important engineering properties of soil.
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