Bulgarian Journal of Agricultural Science
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Specific features of accounting of state of the massive of the frozen soil grounds under cyclic loads
Sergej E. Rudov, Igor V. Grigorev, Olga A. Kunickaya, Varvara P. Druzyanova, Aleksandr S. Pekhutov, Aleksandr P. Ivanov, Alexander K. Ivanov, Marfa K. Okhlopkova, Vladimir Y. Pankov, Roman G. Borovikov
Abstract: Performance of the forest harvesting operations in the regions of the Russian Extreme North is characterised by the very adverse climatic conditions. Operation of the yarding-and-loading systems on the cryomorphic soil grounds shows that exist the clear need for considering this factor and considering this factor as the complex multicomponent environment. Necessity of minimisation of the man-made burden on the environment is the basis for inclusion of the problem, which is connected with optimisation of quantity of movements of the yarding-and-loading system over one and the same runway, into the category of the most topical problems. The data, which are presented in this article, make it possible to assess (numerically) the effect of application of various systems in the specific climatic and technological conditions. The methodological provisions, which were developed in this article, were the basis of the trial calculations in order to determine adequacy of the mathematical model and technological conditions of exploitation of the yarding-and-loading systems in the case of the cyclic influence of these systems upon the frozen soil ground. It is possible to accept the results of the performed investigations, as well as to accept the performed estimates of influence of parameters of the specific yarding-and-loading system as follows influence of temperature, wetness, ice content, influence of physical and mechanical properties and influence of the state of the frozen soil ground upon the process of deformation of this ground. These results and estimates can be accepted as the initial requirements in the course of simulation and optimisation of the process of cyclic compaction of the soil ground.
Keywords: compaction; cryomorphic; deformation; soil grounds; tree-felling; yarding-and-loading systems
Date published: 2019-12-11
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