METHOD OF CONNECTING AUGER PILE WITH SOLID FLOOR OF UNDERGROUND STRUCTURE Russian patent published in 2018 - IPC E02D29/00 

FIELD: construction.

SUBSTANCE: method of connecting auger pile with solid floor of underground constructions includes planning a zero-pad, arrangement of vertical reinforcement auger piles within the area of the subsurface facility under construction, installation on them of a concrete slab with apertures, alternate descending excavation of soil within each tier, ground planning at the level of next floor. During the manufacture of reinforcement frame of auger pile, at the design elevations, embedded elements are rigidly fixed, which are made of bent heavy-wall pipes with an internal diameter 5-7 mm more than the diameter of bent reinforced bars and bar slope of reinforced frame of auger pile determined by calculation, the embedded elements are limited in size to the external radius of auger pile and filled with easily removing material, which is extracted after the ground layout at the level the next floor and ground excavation around the auger pile, sufficient to ensure free access to embedded elements, followed by an insert in the embedded elements of bent reinforced bars that are connected between themselves by clamps and are attached to the bottom reinforcing grid of the floor slab. Clamps in the form in the plan represent a polygon with quantity of edges equal to the quantity of the bent reinforced bars. Drilling through holes in an auger pile followed by passing through them of reinforced bars attached to the lower and upper grid reinforcements of the floor slab, and the subsequent concreting of the connecting node of the auger pile and the floor slab with concrete class higher than of the floor slab and auger pile.

EFFECT: increased reliability and rigidity of the unit due to more effective perception of longitudinal and shear forces arising in the unit, which leads to a decrease in the material consumption of the structure, increased work safety when joining the floor slab and auger pile of the underground structure, eliminating the complexity of concreting the auger pile compared with the prototype.

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