ОЦЕНКА НЕСУЩЕЙ СПОСОБНОСТИ ПОЧВЫ ПРИ ПОЛИВЕ ДМ «КУБАНЬ-ЛК1» УЧАСТКОВ НА СЛОЖНОМ РЕЛЬЕФЕ

Abstract

The issues of ensuring sufficient support-coupling properties of the Kuban-LK1 widesprinkler sprinkling machine (SM) for working on difficult terrain areas by increasing the bearing capacity of the soil surface are considered. It is noted that with increased rain intensity and, accordingly, increased puddle formation in the zone of movement of running systems, intensive rutting is observed, leading to a bend in the water supply pipeline and, ultimately, to the operation of the protection system. This drawback has a negative impact on the shift time utilization rate and, consequently, on the overall performance of the SM. A progressive decrease in the intensity of the SM water supply is proposed to be used to eliminate it, which will lead to an increase in the bearing properties of the soil. It was determined that when working on slopes, the rain intensity at the end of the SM is 0.4 mm/min. It has been experimentally established that a decrease in the intensity of rain can be achieved by reducing the consumption of sprinklers, as well as by increasing the spray area of the jet. Installation of control devices is proposed to reduce the intensity to 0.3 mm/min. But it has been established that further regulation of rain intensity values is limited by the maximum allowable length of the decrease in the irrigation radius by sprinklers. The installation of stubble-type spreaders for spraying the jet of sprinklers is proposed to reduce the intensity of rain to 0.2 mm/min. An analysis of the experimental data on the dependence of the soil bearing capacity on the intensity of rain and the magnitude of surface runoff showed that with a progressive decrease in the intensity of rain, control devices and dividers provide an increase in the bearing capacity of the soil from 43–47 kPa without control devices to 72–82 kPa with them. Ultimately, the provision of sufficient support properties makes it possible to achieve productive operation of the Kuban-LK1 DM on slope areas.