METHOD FOR ARRANGEMENT OF BORED PILES PACKET Russian patent published in 2009 - IPC E02D5/18 

FIELD: construction.

SUBSTANCE: packet of bored piles is arranged with increased depth of strictly vertical boring due to provision of boring resistance even in bottom section. Packet of bored piles hereinafter means a certain sequence locates in geometric contour specified by project, which may be, for instance, linear - rectilinear, curvilinear, of closed or open contour, which consists of piles that contact to each other and create a certain structure specified by project. Stated objective is achieved by the fact that in method for arrangement of bored piles packet by means of wells boring for every of them, installation of armature frames in them, external diameters of which are 10-15% less than diameter of well for pile, and piles concreting, and wells for bored piles are arranged tight with adjacency to each other or with overlapping of not more than by 5% of well diameter, and after frames installation in them, concreting, and after concrete gains at least 30% of grade strength, additional wells of smaller diameter are bored close to every neighbouring bored piles, and additional piles are filled with concrete mix and, preferably, reinforced, at that boring of additional wells is done with casing pipe, to which soil is additionally removed as it is being submerged from space limited by surfaces of pair of neighbouring bored piles from line of their contact to each other and inverted external surface of submerged casing pipe. At that boring of additional wells is done with casing pipe that contains protrusion in direction of contact line of neighbouring piles, which is used to remove soil in process of boring from mentioned space, at that protrusion has in plan triangular shape or shape similar to triangular shape, which is formed by casing pipe surface section and two concave arcs connected at the top. Besides, diameter of additional well is less then radius of the main well, at that additional wells are placed on one side of packet, or on its two sides - continuously or with alternation in staggered order, and is arranged at length equal to length or less than length of the main pile.

EFFECT: reduction of possible deviation from verticality; lower power inputs of boring and increased bore service life due to minimisation of boring of hardened concrete of neighbouring bored piles, provision of uniform strength of structure arranged from piles.

3 cl, 4 dwg