STRUCTURE OF TUBULAR PILE WITH PROTECTIVE COAT AND PROCEDURE OF ITS SINKING INTO PERMAFROST Russian patent published in 2003 - IPC

FIELD: construction industry, laying of foundations of ground structures in areas of permanently frozen soils. SUBSTANCE: structure of tubular pile includes hollow tubular body. Novelty of proposed invention lies in that hollow tubular body has open lower butt, external wall of tubular body is fitted at level of lower boundary of its protective coat with expander coming in the form of regular trihedral prism which bases are rectangular triangles. One rib α of each base is located along generating line of tubular body, another rib β of each base is perpendicular to it and values of ribs α and β of prism bases of expander are determined by computation. Characteristic feature of procedure consists in creation of zone of defrosted ground in process of sinking of tubular pile along its walls in interval from day surface to lower boundary of protective coat which thickness exceeds thickness of zone of defrosted ground along walls of tubular pile beneath protective coat by value not less than thickness of protective coat. EFFECT: prolonged service life of metal tubular pile, prevention of damage to protective coat of metal tubular pile in process of its sinking. 2 cl, 2 dwg