Analysis of the economic efficiency of major repairs of the tank foundation by the displacement method

Aleksandr Tarasenko,Petr Chepur,Alesya Gruchenkova,Evgeniy Tikhanov,Vadim Krivorotov,S Kudryavtsev,A Zhussupbekov,C Yoo

doi:10.1051/matecconf/201926507004

Aleksandr Tarasenko, Petr Chepur + Show 6 more

Open Access

https://doi.org/10.1051/matecconf/201926507004

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Abstract

The article features the application of a method of displacement during major repairs of vertical steel tank bases. Premises on the effectiveness of the application of the displacement method for repairing the bases of vertical steel tanks in comparison with the traditional method of repair are put forward. The comparative characteristics of the displacement method and the traditional method of major repairs of the bases of vertical steel tanks are given. The authors proposed a method of temporary displacement of vertical steel tanks, which is new for Russian practice of major repairs. An algorithm for calculating the cost-effectiveness of repairing the bases of VSTs is developed both by the traditional method and by the displacement method proposed by the authors. Technical solutions are substantiated considering calculating the stress-strain state of tank structures under nonaxisymmetric loading. A model is formed and basic parameters of the economic efficiency evaluation of major repairs of the vertical steel tank base are determined. Evaluation of the economic efficiency of major repair procedures and further maintenance of the repaired tank bases is carried out. A high economic efficiency of the new technological method of displacement is proved in comparison with the traditional method.

Highlights

Many foreign companies have technologies that allow constructing cylindrical steel tanks (Figure 1) that can be moved at various stages of operation
The analysis shows that costs related directly to repairing the bases of vertical steel tanks by the displacement method are 1.5 million rubles or 7.3% higher than similar costs when repairing using the traditional method
The authors proposed a method of temporary displacement of vertical steel tanks, which is new for Russian practice of major repairs

Summary

Introduction

Many foreign companies have technologies that allow constructing cylindrical steel tanks (Figure 1) that can be moved at various stages of operation. In Russian practice, such technologies are not available, since the infrastructure allows oil to be transported to the consumer without moving the tanks. The thawing of frozen soil, depending on the amount of ice, causes subsidence or complete creeping of dikes. In this case, both uneven subsidence and expulsion of structural elements by frost heaving are observed [1-4]

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