COMBINED METHOD OF ARRANGEMENT OF PILE FOUNDATIONS IN PERMAFROST SOILS Russian patent published in 2020 - IPC E02D27/35 

FIELD: construction.

SUBSTANCE: invention is intended for arrangement of pile foundations during construction of buildings and structures of various purposes in areas of permafrost soils with preservation of base soils in frozen state during construction and during entire period of operation of building or structure. Combined method of pile foundations in permafrost soil includes well drilling in permafrost soils with extraction of loosened frozen soils during drilling, installation of a pile and its subsequent concreting in the well, at that, using pile structure including upper assembly part with reinforcement outlets, which length corresponds to depth of active soil layer, and lower monolithic part, and along the entire length of the pile structure there is a metal pipe with a blind lower part, into which a heating element is installed to create normal conditions for hardening concrete, and to upper part after setting of concrete to weld plug with nipple for coolant pumping, for this purpose in order to prevent contact of pile with permafrost soils of bed on bottom of drilled well, pre-laid layer of crushed stone or gravel, after which pile structure is installed in well, concreting of lower monolithic part is carried out in layer of permafrost soils and further filling of well bore in active layer with non-heaving soil.

EFFECT: intensive recovery of base soil temperature conditions.

3 cl, 3 dwg