SU715724A1 - Pile foundation - Google Patents

Description

I

The invention relates to the construction, in particular the structures of pile foundations for buildings and structures.

Known pile foundation with a low ring grillage 1.

The foundation is a group of piles arranged in a circle (in a plane) rigidly joined from above by a ring grillage.

The disadvantages of this foundation are the inclusion in the work of the foundation of the soil thickness only under the annular grillage; the redistribution of loads between the foundations of the foundation is performed only by an annular grillage.

The closest technical solution to the invention is a pile foundation, including a grillage and inclined piles 2.

The disadvantage of such a pile foundation is insufficient bearing capacity.

The aim of the invention is to increase the bearing capacity of the foundation due to the involvement of the base soil.

The goal is achieved by the fact that, in a well-known pile foundation, including a grillage and inclined piles, the piles are located along cone-forming axes coaxially with the longitudinal axis of the foundation and directed in opposite directions, with the upper and lower ends of all the piles placed respectively in the same horizontal planes, and the foundation provided with an annular element with a diameter smaller than the diameter of the grillage uniting all the piles

both cones in the place of their closest approach.

FIG. 1 shows the proposed foundation; in fig. 2 - the same plan view; in fig. 3 is a section A-A in FIG. 2; in fig. 4 is a section BB in FIG. 2

The proposed pile foundation consists of a grillage 1, inclined piles 2 located along forming cones, the top of which is located in the level of the grillage 1 and inclined piles 3 located

along the generators of another cone, the top of which is located in the level of the lower ends of the piles, the cones, along the generators of which are piles 2 and 3, are coaxial with the longitudinal axis 4 of the foundation. The foundation is also provided with an annular element 5 with a diameter smaller than the diameter of the grillage, which unites all the piles 2 and 3 in the place of their Maximum approach.

As a result, a rigid spatial pile foundation with increased capacity is formed, by increasing the surface area of adhesion to the ground; the inclusion of the maximum thickness of the soil in the foundation work; a drastic weakening of the effects on the foundation from frost heaving of the soil; effective redistribution of loads between the foundations and leveling of stresses in the soil layer under the foundation.

Dimensions of piles, grillage and ring EZhmsht; which are the bearing elements of the foundation, are determined by calculation.

The foundation described is described as follows. .

The longitudinal axis of the foundation is secured, the well is pushed or drilled by known methods and mechanisms to the level of the foundations of the ring element 5. The grillage 1 and the ring element 5 are installed and the guide wells under the piles 3 are pressed through the known methods and mechanisms, then the pile 2 is driven in, the guide piles contour 3 and piles 3 are driven, then piles 2 and 3

the monolith are with the grillage and the ring element, the bosom of the well and the element are covered with soil, and the piles 3 are monolith with the grillage.

Claims (2)

1. Gmoshinsky V. G. and others. Fundamentals of engineering forecasting on the example of pile foundations. Publishing house on construction, M., 1972, p. 73. 2. Authors certificate of the USSR. No. 549548, cl. E 02 D 27/12, 08/30/74.