METHOD FOR ERECTING A BORED PILE OF INCREASED LOAD-BEARING CAPACITY FOR CONSTRUCTION IN SEISMIC AREAS Russian patent published in 2021 - IPC E02D5/46 

FIELD: construction industry.

SUBSTANCE: invention relates to construction and can be used when performing foundations that bear significant vertical and horizontal loads (for example, for foundations of high-rise buildings in seismic areas). The method for erecting a bored pile of increased bearing capacity for construction in seismic areas includes drilling a well for a bored trunk, filling it with concrete, installing a reinforcing frame, combining a bored pile with a foundation plate, introducing hollow metal rods equipped with perforated tips with a length greater than that of the bored pile with simultaneous supply of fine-grained concrete under high pressure, installing anchoring plates on the upper parts of hollow metal rods and sealing them into the body of the foundation plate, forming an additional spatial framework of hollow metal rods interacting with the trunk of a bored pile. The upper part of the boring pile is made with a length of 4-6 m and a diameter of more than 1.0 m. Inside the reinforcement frame, inclined hollow metal tubes are installed, at least 3 pcs. for a pile diameter of less than 1.5 m and 6 pcs. for a pile diameter of less than 2.0 m, at an angle of 2-4°, depending on the length and diameter of the upper part of the bored pile, into which, after gaining the strength of the concrete of the bored trunk, hollow metal rods are inserted, 3-5 times longer than the length of the upper part of the bored trunk.

EFFECT: increasing the bearing capacity of the material and soil of the bored piles for horizontal and vertical loads in seismic areas, effective use of the material for construction by combining a short pile of large diameter with long inclined drill-injection piles of small diameter, while the proposed design is not limited in length, subject to the ratio of the lengths of the upper and lower parts of the bored pile, and the total bearing capacity along the side surface and along the tip, formed by combining vertical and inclined elements, makes it possible to use the developed combined solution for heavily loaded structures and high-rise buildings in seismic areas.

1 cl, 2 dwg