SU903474A2 - Driven pile - Google Patents

Description

(54) FUNERAL BELT

one

The invention relates to construction.

According to the main author. St. № 588292 Unknown pile sva comprising pyramidal pointed down the barrel formed of consecutive truncated pyramids facing mensche base downwards with the same angle of faces of inclination, the lower base dimensions vyschelezhaschey pyramid prevyschayut dimensions of the upper base underlying the pyramid, the truncated pyramids constituting the trunk , can be made with chamfers in the lower part 1.

However, this driving pile, increasing the maximum load on the structure due to the stepped side surface, has an insufficient increase in the bearing capacity and insufficiently high efficiency of using the feet on the side surface. This is due to the fact that the number of steps on the side surface and their height, depending on the size difference between the lower base of the overlying pyramid and the upper base of the underlying pyramid, are significantly limited by the driving pile immersion process, and the increase in the number of steps and their height is significantly. reduces the total area of the lateral surface of the pyramidal pile, reducing the degree of efficiency of application of steps on the lateral surface of the pile.

 The purpose of the invention is to increase the bearing capacity of the pile.

This goal is achieved by the fact that grooves with a curvilinear concave surface are formed on the lateral faces of the truncated pyramids, and the angle of inclination of the generative grooves of the same faces of the pyramids is equal to the total slope of the pile shaft.

FIG. 1 shows the proposed overall view; in fig. 2 - the same, top view;

 in fig. 3 - the same, in isometry.

The hammerhead includes a pyramidal, pointed downward trunk 1, coaxially from successive truncated pyramids 2, having the dimensions of the lower

20 bases 3 of the overlying pyramid, larger than the upper base 4 of the underlying pyramid, and chamfered 5 in the lower part, each side of the truncated pyramids made with a groove having a concave curved surface 6,

Nau which angle Kochon generatrix 7 is equal to the common bosom of the trunk 1 pile.

When a pyramidal pile is immersed, a soil compaction zone is formed around it with a diameter of 2-2.5 times the cross section of the pile, as a result of which the pressure from the external load is transferred to the compacted zone, within which the soil has a high deformation modulus. The transformation of the side faces of the pile into concave curved surfaces leads to an increase in the chamfer perimeter at the bottom of the truncated pyramids. The elongation of the parameter of each chamfer increases the overall lateral surface of the chamfers and, therefore, ensures the bearing capacity of the pile, without increasing the number of steps and their height. In addition, EU; 1 and in the well-known invention, the calculated co-resistance of the soil under the lateral surface of the chamfers depends on the magnitude; the bulk weight of the skeletal fly and from its compaction due to the pressure on the ground of the lateral surface of the pyramid; 11) Noah of the pile, p. para; 1 enn (l ierpen; i iK. i Jip io); ol1Ch) the gift of the curvilinear side surface of the pile uplotlopeine soil at the expense of the pressure of the side surface; ) hn () stn p) (it doesn’t go only in the manner of ..Ini (from L1adiupa 1 s izveschchN)) :; invention), a perichearted horda, which expands the largest arc, if we consider the action of the usi.chi in the niloskoy echechepn, pernendiku.arnaya (forming the red top of the sign on the surface, but also in the direction of the sign, 1ar-a, (1). in which the second components of the radial usi.lii act. C. C. Eatly enough. There is also an aggravated state of the soil around the swaps, with KoTopo.vi, the soil uses a compression in two sections, which contributes to the increase; soil strength by reducing its porosity. Thus, the calculated soil resistance of the soil by the lateral surface of the chamfers increases, but the new ability of the pile.

The proposed design increases the modulus of soil deformation around the pile due to the compression of the soil in two directions.

carried out by a concave curved side surface, which is a part of the side surface of the cylinder.

The normal pressure of a part of the side surface of a cylinder on the ground under the pressure of an external load causes in the ground forces directed along the radius of the cylindrical surface. This means that the components of the radial force provide compression of the soil on each side of the truncated pyramid in two directions, increasing the modulus of the soil deformation. A higher soil deformation module increases not only the specific normal pressure of the soil on the side surface of the pile, but also increases the adhesion of the chamfers to the soil and increases the resistance of the soil along the side surface of the pile to the shear. At this m, the proposed design, by creating an increased module of soil deformation around the pile, ensures the transfer of external load to the surrounding soil to a greater depth, thus expanding the zone of soil compaction, which makes it possible to limit the possibility of the soil deformation zone .

The use of the proposed drive pile design provides, in comparison with the known drive pile, an increase in the bearing capacity by at least 20%, and without an increase in the consumption of concrete and metal.

Claims (1)

Invention Formula Zabivna Sva on auth. St. No. 588292, characterized in that, in order to increase the bearing capacity, grooves with a curvilinear concave surface are formed on the lateral faces of the truncated pyramids, the slope of the generatrix of the grooves of the same faces of the pyramids being equal to the total slope of the pile shaft. Sources of information taken into account during the examination 1. USSR author's certificate 4S Luo 588292, cl. E 02 D 5/48, 1974.