Performance of Oil Storage Tanks on Vibroflotation Improved Hydraulic Fill in the Port of Tampa, Florida

by Fintan J. Buggy, Dames & Moore, Tampa, United States,
Ramon E. Martinez, (M.ASCE), Dames & Moore, Tampa, United States,
James D. Hussin, (M.ASCE), Dames & Moore, Tampa, United States,
Richard J. Deschamps, (A.M.ASCE), Dames & Moore, Tampa, United States,

Document Type: Proceeding Paper

Part of: Vertical and Horizontal Deformations of Foundations and Embankments


The paper describes a case history of design, construction and performance monitoring of two 80,000 barrel oil storage tank foundations 35 meters in diameter on a soft hydraulic fill soil improved using stone columns at the Port of Tampa. Settlement and horizontal deformation predictions were performed by: (i) semi-empirical methods and elastic theory; (ii) FLAC finite difference program using elastic and bi-linear, Mohr-Coulomb soil models; and (iii) CRISP finite element program using a non-linear, modified Cam-Clay model. Average total settlements of approximately 300 to 330 mm at the edge, 120 to 170 mm edge-to-edge differential settlement and 90 mm maximum horizontal soil displacements near the tank edge were subsequently measured during construction and initial hydrotesting of the tanks. Measured displacements compared well with predicted values to within 30 percent.

Subject Headings: Soil settlement | Storage tanks | Hydraulic fills | Hydraulic design | Ports and harbors | Finite element method | Soil deformation | Foundation settlement | Florida | United States | Tampa

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