Assessment of the efficiency of the skidding portage on the slopes with incomplete information on the technological properties of thawing soils of the cryolithozone

In the Russian Federation, a significant part of the territory of the forest fund is located on permafrost. Many regions of Russia have large reserves of ripe and over-mature operational forests, and a significant part of these reserves are located in hard-to-reach places, not vehicles and skidding systems based on them not only remains relevant, but becomes even more acute, since the ecosystems of mountain forests, forests on the slopes of hills, etc., are among the most vulnerable, subject to water and wind erosion. To reduce the negative impact of forest machinery movers on soils, semi-tracked vehicles are often used, which, due to a significantly larger contact spot with the surface of the movement, and a greater traction force in difficult conditions, show better performance characteristics. The article shows that when drawing up a plan for the development of cryolithozone cutting areas on slopes, it is necessary, among other things, to take into account the geotechnical conditions of the cutting area, namely, its relief, hydrogeology, technological properties of composing soils — their stability, strength, bearing capacity, elastic-plastic and deformation characteristics. The results of the performed studies contribute to the solution of the task and allow for a more reliable assessment of the operability of the skidding portage (technological corridor) on the slopes with incomplete information about the parameters of the strength passport (technological properties) of the thawing soil. only in relation to the development of the road network, but also in terms of terrain. Currently, the overwhelming volume of wood harvesting in Russia is produced with the help of modern machine complexes, mainly including wheeled forestry machines of various layouts and purposes. At the same time, the problem of the negative impact of wheeled forest vehicles and skidding systems based on them not only remains relevant, but becomes even more acute, since the ecosystems of mountain forests, forests on the slopes of hills, etc., are among the most vulnerable, subject to water and wind erosion. To reduce the negative impact of forest machinery movers on soils, semi-tracked vehicles are often used, which, due to a significantly larger contact spot with the surface of the movement, and a greater traction force in difficult conditions, show better performance characteristics. The article shows that when drawing up a plan for the development of cryolithozone cutting areas on slopes, it is necessary, among other things, to take into account the geotechnical conditions of the cutting area, namely, its relief, hydrogeology, technological properties of composing soils — their stability, strength, bearing capacity, elastic-plastic and deformation characteristics. The results of the performed studies contribute to the solution of the task and allow for a more reliable assessment of the operability of the skidding portage (technological corridor) on the slopes with incomplete information about the parameters of the strength passport (technological properties) of the thawing soil.