Development of a hybrid methodology for monitoring tanks built on permafrost soils

Abstract

This paper examines the stress-strain state of a tank using data obtained through hybrid monitoring conducted in permafrost conditions. Hybrid monitoring integrates traditional geodetic surveys of the tank walls, levelling of the tank bottom, and automated settlement control of the central part of the bottom during the tank's operation.

The authors applied a numerical method using the ANSYS software environment. Also, they reviewed three calculation options: one utilizing geodetic control data for the wall and bottom, another incorporating extensometer measurements, and a third combining deformation history data of the tank along with extensometer readings.

The study found that settlements in the central bottom lead to localized zones of stress concentration in the tank wall. Additionally, accumulated deformations create an initial stress-strain state in the structure, which deteriorates as the tank continues to deform. The integration of hybrid monitoring with numerical modeling enables predictions of changes in the tank’s stress-strain state. These predictions form the basis for developing preventive measures to avert accidents.