Pitthaya Jamsawang, Dennes T. Bergado, Panich Voottipruex, Francisco Baez, Pornkasem Jongpradist
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引用次数: 0
Abstract
This paper presents a case study in which wet and top feed vibro replacement stone columns are used to support a 20-m-high fuel tank built on loose to medium sand deposits. The design considerations, installations, applications, field tests, correlations, and subsequent three-dimensional finite element analyses are presented. The soil profile of the case study comprised approximately 8 to 12 m thick loose to medium-dense silty sand layers with a high groundwater table. The 1-m-diameter stone columns were installed in a triangular pattern with a spacing of 2.1 m. The improvement depths were 8, 11, and 12 m. After construction was completed, quality assurance of the stone column installation was performed via various field tests. Based on the hydro test results, the improved ground could carry an allowable bearing capacity of 200 kPa transferred from the 20-m-high fuel tank and exhibited a maximum settlement of less than 50 mm, which met the design criteria of this project. Owing to reasonable quality control during stone column installation, the tilt of the tank caused by the nonuniformity of the improved sands was less than 10 mm. The enhanced strength ratio of the surrounding sands was 2 the densification effect. Furthermore, three-dimensional finite element simulations were performed. The results were consistent with the field measurements, verifying the effectiveness of the ground improvement technique. This case study demonstrates the practical application and benefits of vibro-replacement stone columns in enhancing bearing capacity, minimizing settlement, and improving overall foundation stability in challenging geotechnical environments, contributing to future engineering practices for similar projects.
期刊介绍：
Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces:
• the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations;
• the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change;
• the assessment of the mechanical and hydrological behaviour of soil and rock masses;
• the prediction of changes to the above properties with time;
• the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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