METHOD OF ERECTION OF CONCRETE IN SITU PILES IN LAMINATED DRIVEN WELLS Russian patent published in 2008 - IPC E02D5/34 

FIELD: building.

SUBSTANCE: invention concerns foundation engineering in particular to methods of increase of a load-carrying capacity of friable and weak priming coats, including, possessing specific, collapsible, salted and other properties. The way of erection of concrete in situ piles includes the following technological operations: formation of a longitudinal hollowness of a driven well in a vertical or slope direction without dredging and lamination of a cylindrical-taper driven well by ground extruding using a fusiform roller in a nearby borehole space, thus forming the condensed working area of a driven well, filling of a driven well with the concrete mix not lower than B 3.5 class. Thus radius of the condensed working area is defined under the formula: and the expense of concrete for driven well filling is defined under the formula: V₀=(πd²/4)·(l_c+(1/3)·l_k), where: d - diameter of a forming (cylindrical) roller of driven wells, m; ρ_d - initial (to lamination) consistency of the soil in a dry condition, t/m³; ρ_dS - consistency of the soil in a dry condition in the condensed working area, t/m³; d - diameter of the stilt, m; l_c - length of a cylindrical lot of the driven well, m; l_k - length of a cone-shaped lot of the driven well, m; L - length of a stilt, m.

EFFECT: improvement of quality and a load-carrying capacity of erected stilts.

2 cl, 4 dwg