SU1491963A1 - Screw pile - Google Patents

Abstract

The invention relates to the implementation of a screw pile and allows to increase its carrying capacity. The screw pile contains a solid shaft 1 in the form of a straight rod and a blade 2 in the form of a rod curved in a helical spiral, the ends of which are rigidly attached to the shaft of the pile 1, observing the gap 3 between the curved rod and the barrel. The entry part of the helical blade is made in ascending order, central - in constant direction and tails - in decreasing radii. 2 Il.

Description

one

(21) 4222512 / 31-33

(22) 04/06/87

(46) 07.07.89. Bul 25

(71) Brest Civil Engineering Institute

(72) V.P.Chernyuk, V.N.Pchelin, P.V.Shvedovskiy and P.S. Poit

(53) 624.155.2 (088.8)

(56) USSR inventor's certificate 1216285, cl. E 02 D 5/56, 1984.

US patent 2447444, CP. 52-157,1958.

(54) SCREW PILED

(57) The invention relates to the screw screw pile and allows to increase its bearing capacity. The screw pile contains a solid shaft 1 in the form of a straight rod and a blade 2 in the form of a rod curved in a helical spiral, the ends of which are rigidly attached to the shaft of the pile 1, observing the gap 3 between the curved rod and the barrel. The entry part of the helical blade is made in ascending order, central - in constant direction and tails - in decreasing radii. 2 Il.

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FIG.

The invention relates to the construction and construction of screw piles and anchors, designed to fix the waste of various structures, temporary and permanent supports.

The purpose of the invention is to increase the carrying capacity of the screw pile.

Figure 1 shows the screw, general view; figure 2 - view And figure 1.

The screw shaft contains a solid barrel 1 in the form of a straight rod and a blade 2, made in the form of a rod bent in a helical spiral, the ends of which are rigidly fixed to the trunk 1 with a clearance 3 between the turns of the bent rod and the trunk 1. ascending, central - by constant and tails - by decreasing radii. The core of the blade 2 is bent with the formation of 1.0-1.5 turns.

The immersion of the coil in the ground is carried out with the help of special screwing (low-powered) mechanisms and devices or manually. During rotation, the inward part of the blade forms a small groove in the ground, through which the central and then tail parts of the blade 2 sinks. Barrel 1 imparts rigidity to the whole structure, including blade 2, allows the blade 2 to transfer a certain axial load to the ground. at

under load, the blade 2 works as a continuous one, since the gap 3 between the last and the barrel 1 is not active and the ground in it works with the formation of an arched effect.

To increase the rigidity and strength of the blade and the design of the screw pile as a whole, the blade can

be pre-stressed (compressed, stretched or twisted around the barrel) and firmly welded to the trunk by electric welding.

The design of the proposed screw pile is easy to manufacture, effective in production, when immersed in the ground and in service, it can be widely used in construction practice.

Claims (1)

Invention Formula Screw pile including barrel In the form of a straight rod and a blade in the form of a rod bent in a helical spiral, placed around the trunk, characterized in that, in order to increase the bearing capacity of the screw pile, the curved rod of the blade is placed around the trunk with a gap and rigidly attached to it by ends, and the blade is curved in length along the ascending, constant, and descending radii, respectively, P of its lead-in, central, and XVFV parts.