Many difficulties arise in organic soils due to low bearing capacity, very high compressibility, and high-water content, challenging engineers and researcher engaging in geotechnical studies. Also, the effects of mechanical disturbance of specimens in obtaining different geotechnical properties of soils are one of the most complex issues in geotechnical studies. The laboratory model tests under vertical load for determining ultimate bearing capacity of footing were carried out on the surface of organic soils to avoid the effects of the sampling disturbance to perform experiments in field condition. Block samples obtained from inspection pit using the big size test box sampler were considered high sample quality according to different methods. In the present study, large-sized undisturbed samples were obtained to determine bearing capacity organic soils. The results of loading tests were compared with results of the empirical methods available in literature, proposed for the prediction of bearing capacity, and two-dimensional finite element analysis results. The undisturbed organic soil samples obtained as natural formations were transported to laboratory for testing, and thereafter the loading tests were carried out on twenty-one box samples. Also, the index and engineering tests were performed on undisturbed samples. The organic soil samples were collected from Kayseri Free Trade Zone and Organized Industrial Zone area of Turkey for this study. Except for the hyperbolic model, the ultimate bearing capacity values obtained with different methods based on the results of experimental investigation are compatible with finite element results and empirical methods.

由于承载力低、压缩性非常高和含水量高，有机土壤中出现了许多困难，对从事岩土工程研究的工程师和研究人员提出了挑战。此外，样本的机械扰动对获得土壤不同岩土特性的影响是岩土研究中最复杂的问题之一。为避免采样扰动的影响，在田间条件下进行试验，在有机土表面进行垂直荷载下确定基脚极限承载力的室内模型试验。使用大尺寸试验箱取样器从检验坑中获得的块状样品根据不同的方法被认为是高质量的样品。在目前的研究中，获得了大尺寸的原状样品，以确定承载力的有机土壤。加载试验的结果与文献中可用的经验方法的结果进行比较，提出用于预测承载力，以及二维有限元分析结果。将作为天然地层获得的未受干扰的有机土壤样品运送到实验室进行测试，然后对 21 箱样品进行加载测试。此外，指数和工程测试是在未受干扰的样品上进行的。本研究从土耳其开塞利自由贸易区和有组织的工业区地区收集有机土壤样品。除了双曲线模型，