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Foundation of 20,000 m 3 tanks on soft soils from risk assessment point of view
Author(s) -
PULKO Boštjan,
BATTELINO Lilian,
LOGAR Janko
Publication year - 2018
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.702
Subject(s) - pile , storage tank , foundation (evidence) , geotechnical engineering , engineering , pipeline transport , port (circuit theory) , point (geometry) , oil storage , water tanks , structural engineering , civil engineering , marine engineering , mathematics , petroleum engineering , waste management , mechanical engineering , geography , archaeology , geometry
Abstract In mid 1980s, the construction of seven smaller tanks having maximum volume of 7,500 m 3 and maximum diameter of 25 m for the storage of liquid goods took place in the Port of Koper on the deposit of 28 m thick soft clayey layer. Ground improvement with geosynthetic encased stone columns and preloading was used (Sovinc, Vogrinčič, 1991). Due to satisfactory performance of these tanks, six new large tanks were first supposed to be built in similar way. Due to time constraints and risks involved with much larger tank sizes (V = 20,000 m 3 and D = 48.7 m) in combination with variable ground conditions, these new tanks were finally founded on driven tubular steel piles. The paper will present step‐by‐step decision‐making process from the risk management perspective supported by ground investigations, pile load tests and numerical modelling. Finally, the measured behaviour of the new tanks after first 9 years of operation will be shown and practical experience with maintenance of these tanks and connecting pipelines will be shortly presented.