METHOD TO IMMERSE PILES IN SEASONAL-FROZEN GROUND Russian patent published in 2019 - IPC E02D27/35 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, in particular, to the pile foundations from prefabricated driving piles, submersed at negative temperatures in seasonal-frozen ground. Method of piles immersion into seasonal-frozen ground includes preliminary drilling of wells with thermovibroleader in places of piles immersion, made in the form of cylindrical hollow bar with tip on one side and rigidly connected flange with opposite, on which vibration submersible is installed, with subsequent final driving of piles into obtained wells. Thermovibroleader is installed on mast of copra, which implements piling, on adjacent edge of pile hammer, between tip and rod there is adapter, which is rigidly fixed to rod, and connection with tip is detachable. Tip of the thermovibroleader has a cone-shaped shape, in the central cavity of which there is a heat-resistant insulator with a screw slot on the outer surface, containing a heating spiral with high specific resistance, a heat-resistant elastic gasket is installed between the insulator and the adapter to exclude axial movements of the insulator. On external surface of tip radially directed ribs with internal longitudinal channels are rigidly fixed, and in walls of tip there are transverse radially arranged holes. Before immersion of thermovibroleader the tip is heated and then submerged into seasonal-frozen soil with included spiral, and after soil development thermovibroleader is removed.

EFFECT: technical result consists in improvement of efficiency of device pile foundations of buildings of prefabricated piles, submersed at negative temperatures in seasonal-frozen soil by reducing costs when installing foundations by preventing destruction of piles during their immersion through a frozen layer, as well as reducing values of deviations of piles in planned position, allowing to increase the speed of wells in frozen soils.

4 cl, 3 dwg