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The aim of this study is the improvement of Terzaghi bearing capacity formula which is a very common method to determine the bearing capacity in shallow foundations. For this purpose, many sampling has been done in very wide range for several formulas and variances that use to determine the bearing capacity in shallow foundations and a new formula is derived based on the Terzaghi bearing capacity formula with modification cofficionts. Terzaghi keep as template however, the coefficients in Terzaghi template are evaluated with non-linear regression analysis method based on the soil samples that characteristic's determined in synthetic way. As a result of this evaluation, new formula is developed with new coefficients that are referred to Terzaghi template. The proposed formula is compared with other analytical bearing capacity and experimental bearing capacity values. [ABSTRACT FROM AUTHOR]

Traditionally, for footings on cohesionless soils, the bearing capacity factor Nγ is modified if an underlying rigid layer exists within a depth (H) less than or equal to the width of the footing (H ≤ B). However, the validity of this practice has been challenged by some recent studies, which indicate that this modification should be applied for rigid layer depths of up to three times the width (H = 3B) for circular and square footings. In addition, there is no consensus on whether the shape factors should be modified for this condition as well, and if so, how. In this study, laboratory test results of axially loaded rigid square and rectangular footings on sand underlain by rigid bases at five different depths are presented. The results are discussed within the framework of the limiting value of H/B for which the bearing capacity should be modified considering the effect of the footing shape as well. [ABSTRACT FROM AUTHOR]

A software for generating a geotechnical report is developed by using the Excel spreadsheet software to ease the preparation of geotechnical report, to enable faster calculations, to decreasing the probability of mistakes to a minimum and to obtain the required data for secure and economic design. In the software, for facilitating the adding of required calculations and results to the geotechnical report, the formulas, tables and figures are placed in the pages. In the present commercial software packages, the calculation results are generated by only a few limited calculations or the required organizations are not made for calculation outputs to be present in the geotechnical report as a whole. So a software that combines the geotechnical calculations is developed. [ABSTRACT FROM AUTHOR]