SU63656A1 - Device of reinforced concrete pile support - Google Patents

Description

Prefabricated reinforced concrete pile supports did not become widespread due to the fact that all applied constructions required a high accuracy of the performance of pile works both in terms of the distance between the pile in the plan and in terms of the location of the heads of the driven piles at the same height. Therefore, as a rule, after the strikers of the piles, it was necessary to process their heads. This treatment consists either in breaking the heads of unnecessarily long piles, or in cutting short ones. The latter operation is extremely time-consuming, since in order to make a pile it is necessary to break its head in order to expose the pile reinforcement and then install the reinforcement and formwork of the overgrown area; only then can concrete be laid. Since there are almost no cases in the construction practice when the heads of all blocked reinforced concrete piles are located at the same mark, such works are usually encountered. This reduces the effect of the use of existing structures of precast reinforced concrete pile supports to such an extent that

making the attachment on site is considered more appropriate.

The invention aims to eliminate the above noted drawbacks and is as follows.

In reinforced concrete beams (nozzles), connecting the heads of the piles, nests with shoulders in the upper part of them were made; With these nests, the beams are put on the heads of the piles, after which the nests are poured with concrete.

Thus, the proposed support will have the advantages of a prefabricated structure, both furnaces being solid at the same time, thanks to the filling of nests with concrete.

In FIG. 1 depicts an exemplary form of the implementation of the proposed device in relation to the intermediate supports of bridges (external appearance); FIG. 2 and 3 is a section along I-I and II-II in FIG. one; FIG. 4 is a longitudinal vertical section along the support; FIG. 5 - beam (nozzle) in axonometry; FIG. 6 is a side view of a beam with a partial cut; FIG. 7 - beam in the plan.

The pile support shown in the drawing consists of piles 1 and a box-shaped attachment 2. Reinforced concrete piles to save material and also to lighten the weight

and ease of immersion with the help of the rinsing pipe is made tubular. They can be manufactured by centrifugal means, which makes them more durable and makes it possible to manufacture piles of large diameter and small thickness, as well. The nozzle is made up of two absolutely identical in shape box-shaped girders with a U-shaped cross section. The division of the nozzle into two mouths makes it possible, when installed, to create a cross slope by appropriately tilting each half. In the beams, transverse partitions (diaphragms) are made 3. Each pair of diaphragms together with the walls of the beam forms a nest into which, when installing the nozzles, the head of a Siai enters. The dimensions of the nest in the plan are assigned in such a way that the support assembly would be possible if the pile is deviated from the vertical in any direction. The horizontal flange of the beam within the nests has openings 4 for supplying concrete, by means of which the pile head is embedded. The dimensions of this hole are slightly smaller than the dimensions of the socket, so that in the upper part of the socket there are shoulders with which the beam can rest on the pile head. In those cases when the heads of the piles are at different levels, the cascade is installed in the design position with the help of concrete pads installed between the heads of the pile and the shoulders of the sockets. The gaskets are made in the form of rings 5 or bars 6.

After aligning the position of the nozzles, the bottom of the hole between the pile and the walls of the nest is closed with metal inventory formwork and the compartment on top is filled with concrete. If you do not close the hole of the pile from above, then during concreting the whole pile will be filled with concrete. To avoid this, the hole in the pile is covered with a concrete circle 7, which is lowered 40-50 cm below the nozzle and supported by a long arm having hooks on the ends that rest on

butt pile. Before filling the inside of the pile with concrete, in order to avoid cement milk leakage, a 3–5 cm layer of sand should be poured onto the mounted concrete circle. The halves of the nozzles are connected on the middle pile. Here, for a stronger connection, fittings are laid in the docked compartment.

Due to the considerable height of the nozzles and the method of joining them with their own, with the difference in height of pile heads up to 50-60 cm, the support can be assembled without any additional work. In cases where the difference exceeds the specified limit, additional work is needed to increase or shorten the piles.

Both types of work are performed prior to installation of the nozzle. Pile buildup is carried out by installing a piece of pile of the required length on a short pile and splicing it with a new pile, by arranging an internal reinforced concrete plug in the place of their joint.

The shortening of the pile is done by destroying the excessive height of the pile. It should be noted that fears of damage to the lower layers of concrete during the destruction of the pile head are not significant, due to the considerable length of embedding the pile into the nozzle.

Subject invention

Claims (2)

1. A device of reinforced concrete pile supports with the use of beams (nozzles), connecting piles, characterized in that the beams (nozzles) have through nests with shoulders in the upper part of them, with the aim of rigid joining of beams with their own, by putting beams on their nests heads of piles and the subsequent filling of nests with concrete. 2. The form of the device according to claim 1, characterized in that the beams (nozzles) have a U-shaped cross-section with transverse partitions 3 forming nests. FIG. one III I I I NJ4 1O-iwJ FIG. four  jjlUt g / FIG. 2 FIG. 3 in FIG. five l /