SU968172A1 - Pile - Google Patents

Description

(54), PILED

one

The invention relates to stoning, in particular, to the construction of pile foundations erected in subsiding soils.

Known bored pile with the tamping into the bottom of the well rubble flj.

The disadvantage of this design is the impossibility of its use in shrinkable soils 11 of a type of considerable thickness, since non-corrosive friction on the side of the pile adversely affects its bearing capacity.

Closest to the invention to the technical essence and the achieved result is a pile, including a barrel, installed in a well formed in the ground with a gap relative to its walls, and a near-barrel filling, 2J.

A disadvantage of the known construction is that the forces of negative friction arising from the subsidence of the soil.

They load the pile, reducing its bearing capacity.

The aim of the invention is to increase the carrying capacity in subsiding soils.

The goal is achieved by the fact that in the pile, including the barrel, installed in the well bore formed in the ground with a gap relative to its walls, and near-shaft filling, the near-stemming filling is made up of a composite height and a bottom layer of loosely compressible the material and the upper one are made of a cement-sand mortar, and the barrel is partly supplied with an anti-friction coating over a part of the length equal to tolt or the upper filling layer. which can be made of a layer of cardboard.

Claims (2)

In this case, the barrel can be made tapering downwards and antifriction. Blur - in the form of grease. FIG. 1 shows the frame, which is described in FIG. 2 shows an embodiment of a pile tapering downwards; in fig. 3 is a section A-A in FIG. one; in fig. 4 is a section BB in FIG. 2. Sva includes a barrel 1, immersed in a well formed 4, formed with subsiding soil 2, with or without broadening, punching or other methods of well 4, coated with antifriction coating 5 and buried at least m into the concrete filling of the formed widening 3. well 4, near-wellbore filling in the lower part of loose, easily compressible material 7 (for example, soil-) -ji of the upper part from cement-sand mortar 8. Barrel 1 is equipped with clamps 9, ensuring its central location in the well 4, Anti-friction coating 5 Can be made of cardboard. The pile structure can be modified in case the barrel 1 is made in the form of a truncated cone or prism and is mounted with a smaller base down. In this case, the insulating layer can be replaced by simply coating the precast element with salt oil or other grease preventing the adhesion of the precast concrete to the cement-sand mortar. The described structure works as follows. When soaking the soil 2 surrounding the pile, it sinks. The resulting negative friction forces are transmitted to the cement-sand mortar cutter 8, causing it to move downward. The antifriction coating 5 prevents the transfer of force to the barrel 1 and the entire load from the jacket is transferred by its end to the buffer layer from loose easily compressible or slightly water-saturated soil material 7. The capacity of the pile in this case should not be reduced by the amount of negative friction. The horizontal pressure of the soil during its subsidence is fully perceived by the jacket, which can be reinforced. The use of the described invention provides the possibility of erection of piles in subsiding soils while maintaining the carrying capacity of the structure. during operation. The Claim 1. Sva, comprising a barrel installed in a well formed in the ground with a gap relative to its walls, and near-stem filling, characterized in that, in order to increase the bearing capacity in subsiding soils, near-stem filling within the thickness of the settling layer is made composite in height and contains a lower layer of loose, easily compressible material and the upper layer is made of a cement-sand mortar, and the barrel is part of a length equal to the thickness of the upper filling layer provided with an anti-friction coating 2 .Sva according to claim 1, which means that the anti-friction coating is made of a layer of cardboard. 3. Sva according to claim 1, characterized in that the barrel is tapered downward and the anti-friction layer in the form of a grease lubricant. Sources of information taken into account in the examination. 1. Guide to the design of pile foundations, NIIOSP, M., 1980, p. 64. 2. Guide to the design of pile foundations, NIIOSP, M., 1980, about. 9 (prototype).