SU941470A1 - Driven-in pile - Google Patents

Description

(54) FUNERAL BELT

one

The invention relates to the construction, in particular to the structures of driving piles for foundations of buildings and structures erected mainly in wet, fine and mobile sands.

Known driving pile, the trunk of which is made solid with a smooth side surface 1.

However, such piles have a narrow range of application and can be used in favorable natural conditions that do not require large bearing capacity.

The closest technical solution to this invention is a drivehole containing a barrel with alternating protrusions and recesses on the side faces and tips. The protrusions and recesses are rectangular in shape and provide an increase in drag resistance, especially when used in wet, fine and mobile sands, when the ground fills tightly the voids formed during clogging 2.

The disadvantage of such piles is limited bearing capacity due to the shape of the projections and grooves, in which

co-operation involves an insignificant mass of the surrounding soil.

The purpose of the invention is to increase the carrying capacity due to the involvement in the work of the surrounding pile soil.

5 The goal is achieved by the fact that

in the drive pile, including the trunk with alternating protrusions and grooves on the side faces and the tip, protrusions and grooves are made in the longitudinal section of the three, Q square.

FIG. 1 shows a pile, longitudinal section, a variant of a quadrangular cross section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - pile, longitudinal section, variant of circular section; in fig. 415 section BB in FIG. 3; in fig. 5 - pile, longitudinal section, with stress distribution plots.

The hammerhead includes a barrel 1, on the side faces of which there is an alternate 2Q grooves 2 and protrusions 3 having a triangular shape in longitudinal section, tip 4.,

Depending on the cross-section of the trunk (rectangular or round), the presence of grooves and protrusions of the specified shape allows to obtain a trunk composed of abutting each other alternately large or smaller bases of truncated pyramids or truncated cones. After piling the pile into the ground, the latter swims into the sinuses that form. Due to the presence of inclined edges along the height of the trunk, the surrounding soil is involved in the joint work with the pile.

Pile resistance (R) at critical load is equal to the sum of the soil resistance under the lower end of the pile (Rs), the friction resistance along the lateral surface (R) and the soil resistance under all the inclined surfaces of the trunk (RT)

 + RT.

Sva of the described construction can be wooden or reinforced concrete. In the case of reinforced concrete piles, the main longitudinal reinforcement 5 is tied up with internal clamps 6, and the lower and upper ends of the pile are tied together by internal spiral winding 7. Longitudinal reinforcement 8 is installed between the internal clamps, bent at an obtuse angle. The tops of the reinforcement 8 are fastened with external clamps 9. The top and bottom of the barrel are reinforced by the outer spiral winding 10.

The use of the pile of the described construction provides an increase in the bearing capacity due to the involvement of the surrounding soil in the joint work.

Claims (2)

1. Fedorov A.T. Pile foundations and structures. M.-L., OGIZ-Gostransizdat 1933, p. 51. 2. In the same place 61. e e ff f / 7 o fi6 / e  ff ej / fv r CVffOV f / ff ff / 7ff l / / tA Fig-1 F1 / G.2 , 4 / // lgb / e