Patent ID: 6467344
Filing Date: 2002-10-22
Classification: B65D,E02D

Abstract:
A method for calculating a buoyancy safety factor for a tank to be installed underground comprising the steps of:inputting tank installation information, the installation information including spacing between the tank to be installed and other tanks in multiple tank installations; determining a weight of the tank to be installed, the weight including the weight of any annular monitoring fluid associated with the tank to be installed; determining a weight of backfill on top of the tank to be installed and a weight of backfill in any side wedge volumes, end wedge volumes, and side column volumes, the side wedge volumes and side column volumes having boundaries defined such that the boundaries do not overlap side wedge volume or side column volume boundaries of other tanks in multiple tank installations; determining a weight of any top slab, bottom slab or deadman to be installed; determining a weight of any water displaced by the installation of the tank including any water displaced by any tank ribs and any manways associated with the tank; and calculating a buoyancy safety factor by calculating the ratio of the weights of the tank, backfill, slabs and deadmen to the weight of any water displaced by the installation of the tank.