The Study of the Destruction Process of Frozen and Thawing Soils Exposed to the Skidding System
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2020, Vol 17, Issue 2
Abstract
Wood logging in the forests of the cryolithozone is growing more urgent for the Russian Federation due to the depletion of available reserves of mature commercial forests in southern and Central Siberia, the Republic of Buryatia, and Khabarovsk Krai, while the development of woodworking enterprises in the Far Eastern Federal District. During the operation of modern forest machines, for instance wheeled forwarders, the issues of their efficiency, first of all, mobility and technological productivity in the specific production and geotechnical conditions are now becoming ever more relevant. These circumstances together with the necessity to minimize the anthropogenic load on the environment put forward the problem of optimizing the number of passes of the skidding system by one run into the most pressing ones. Special conditions for the operation of skidding systems take place in logging operations on frozen and thawing soils. In the first case, there is a sufficiently large volume of ice in the soil massif. The ice has a great impact on increasing the bearing capacity of the soil under the influence of the initial vertical load of the skidding system. In the second case, frozen soil is oversaturated with water when thawing; therefore, the natural bonds between the solid particles grow week, and the physical and mechanical properties of the soil lose their original values. The forwarder forms a rut in the immediate area of contact of the wheel with the soil. The larger the size of the area, the higher the force transferred to the soil for implementation of the necessary traction. We have developed the mathematical model of calculation of parameters of the destruction process of the thawing soil massif on the border with the permafrost zone. The model allows to make an assessment of hypothetical values of depth of the formed rut including engineering capabilities of forwarders and their maneuvering in the work environment at the design stage.
Authors and Affiliations
S. E. Rudov, V. Ya. Shapiro, I. V. Grigorev, O. A. Kunitskaya, O. I. Grigoreva
Keywords
Related Articles
- EP ID EP683271
- DOI 10.37482/0536-1036-2020-2-101-117
- Views 302
- Downloads 0
Spatial Distribution of Pine Forests in the Caucasus
An effective approach to studying the factors of distribution of forest-forming species of the Caucasus in conditions of orographic inaccessibility of mountainous areas is a combination of the use of geoinformation syste...
Kinetics of Water-Alkaline Hydrolysis of Birch Bark in a Microwave Field
Birch bark consists of silver bark and bast. Silver bark contains up to 50 % of extractives and serves as a raw material for obtaining valuable biologically active substances (BAS), including betulin. A distinctive featu...
Cultivation of Dunaliella salina Microalgae in the Nutrient Medium from Neutral-Sulfite Alkalis
The effectiveness of cultivation of microalgae Dunaliella salina in the nutrient medium from neutral-sulfite alkalis obtained during the production of cellulose from birch wood, with additional sodium chloride addition w...
Reproductive Indicators of Nasczokinâs Lime (Tilia nasczokinii Stepanov)
Tilia nasczokinii Stepanov (Naszokinâs lime) is endemic to the south of the Krasnoyarsk Territory and is of relict origin. Two of its populations grow in the vicinity of Krasnoyarsk on the left and right banks of the Y...
Ecological-Cenotic Structure of the Relict Japanese Pine (Pinus × funebris Kom.) Grove in the Primorski Territory
The condition and ecological-cenotic (parcel) structure of a grove formed by the Japanese pine (Pinus × funebris Kom.) in the Primorski Territory (Ussuri District) are described. Such groves are the residual fragments of...