RU203667U1 - DRIVING REINFORCED CONCRETE PILES - Google Patents

Abstract

The utility model relates to construction, namely to devices for the construction of foundations, in particular to the structures of reinforced concrete piles. A driven reinforced concrete pile contains a concrete barrel made of concrete and a reinforcing cage consisting of longitudinal and transverse reinforcement, while the reinforcement cage is welded, steel bars are used as longitudinal reinforcement, four of which are located at the corners of the pile, and the remaining eight are in pairs between the corner bars in this way in such a way that the distance between all the rods is the same, and as transverse reinforcement - spirals made of steel and welded to the longitudinal reinforcement. The technical result consists in increasing the strength, crack resistance, the ability to perceive higher bending moments and reliability of the pile with an optimal ratio, strength and performance properties of the materials used (concrete and reinforcement), in the possibility of using the machine for making the frame, increasing the production speed, the maximum possible exclusion of manual labor, improving manufacturability in general. 2 ill.

Description

Known designs of reinforced concrete piles of solid rectangular cross-section series 1.011.1-10 (cm), which consist of a concrete trunk made of concrete grade not lower than 20, longitudinal non-tensioned reinforcement class AI (A240), A-II (A-300), and A- III (A400), meshes, cross bars, combined into a lattice girder. / GOST 19804-91 "Driven reinforced concrete piles" /.

Driven reinforced concrete piles of solid square cross-section for the supports of bridges of the 3.500.1-1.93 series are also known. Piles made of heavy structural concrete with an average density of from 2200 to 2500 kg / m inclusive ^W corresponding to GOST 26633-91 and GOST 25,192-82. The piles of Series 3.500.1-1.93 have longitudinal reinforcement concentrated at the corners (double or tripled corners).

The closest design is a driven reinforced concrete pile of solid rectangular cross-section, the trunk of which is made of concrete grade no lower than B20, containing longitudinal reinforcement and transverse, in the form of meshes, individual rods, spirals made of wire Вр-1 with a diameter of 5 mm, including with the formation of spatial frame (RF Patent No. 2182622, class E02D 5/00, published 20.05.2002).

The disadvantages of the known structures are insufficiently high strength with significant material consumption and cost of the pile due to the use of longitudinal rods made of steel of lower ultimate tensile strength of A400C, A500C classes, poor weldability and limited ability to bend the reinforcement. In addition, the use of A500C steel as a reinforcement for a pile limits the temperature range of its use, including in extreme situations and in the Far North. In addition, the use of steel grade A500C for precast reinforced concrete piles does not make it possible to significantly reduce the material consumption and requires recalculation and additional testing of piles. In addition, the reinforcement concentrated at the corners does not allow the fabrication of the reinforcement cage on the machine - the production is carried out manually, which is very long, laborious and not technologically advanced. When reinforced only at the corners, the pile does not have high strength and crack resistance, does not perceive high bending moments.

DISCLOSURE OF THE USEFUL MODEL

The technical task is to increase the strength, crack resistance, the ability to perceive higher bending moments and the reliability of a reinforced concrete driven pile while reducing its cost, reducing labor costs for manufacturing, by ensuring the possibility of using welded joints without reducing the strength characteristics of the pile, as well as the possibility of using the machine for frame manufacturing, increasing the manufacturing speed, eliminating manual labor as much as possible, increasing manufacturability in general.

The achieved technical result consists in increasing the strength, crack resistance, the ability to perceive higher bending moments and reliability of the pile with an optimal ratio, strength and performance properties of the materials used (concrete and reinforcement), in the possibility of using the machine for the manufacture of the frame, increasing the production speed, the maximum possible exclusion manual labor, improving manufacturability in general.

The technical problem is solved by creating a driven reinforced concrete pile containing a concrete barrel and a reinforcing cage, consisting of longitudinal and transverse reinforcement, while according to the utility model, the reinforcement cage is welded, steel rods are used as longitudinal reinforcement, four of which are located at the corners of the pile, and the remaining eight in pairs between the corner bars in such a way that the distance between all the bars was the same, and as transverse reinforcement - spirals made of steel and welded to the longitudinal reinforcement.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 - driven reinforced concrete pile (longitudinal section);

FIG. 2 - driven reinforced concrete pile (cross-section A-A).

IMPLEMENTATION OF THE USEFUL MODEL

Driven reinforced concrete pile contains longitudinal reinforcement 1, and transverse reinforcement in the form of a spiral 2, wound on longitudinal reinforcement 1 and welded to it. Steel rods were used as longitudinal reinforcement, four of which are located at the corners of the 3 piles, and the remaining eight in pairs (on the sides of the pile) between the corner rods in such a way that the distance 4 between all the rods was the same, and as transverse reinforcement - spirals made made of steel, welded to longitudinal reinforcement.

The arrangement of the longitudinal bars of the frame evenly along the entire perimeter (contour) of the pile allows placing a larger number of reinforcing bars in the section, which increases the strength and crack resistance of the pile. In operation, the pile can experience bending in addition to compressive loads; accordingly, a larger amount of reinforcement in the section allows it to perceive higher bending moments.

The piles of the proposed design are made as follows: the reinforcement cage is made in advance, using special equipment, for example, on a machine. First, two rods are taken, which will be located at the corners of the frame. Additional ones are installed between them. The finished mesh is tied with spiral reinforcement, which is welded to each rod. After manufacturing, the frame is sent for storage or used. A frame is placed in the finished formwork. Loops are attached to the frame, with the help of which the piles can subsequently be lifted and moved from place to place. For hinges, reinforcement with a diameter of up to 22 mm is used, installed on both sides of the center of the pile. Next, the pile is poured with concrete at a time. Interruptions will weaken the future structure. The mixture is laid from bottom to top, ramming with a vibrator.

Piles known from the prior art, having longitudinal reinforcement concentrated at the corners (double or triple rods), have a number of disadvantages, for example, due to such an arrangement of the reinforcement, it is impossible to make a reinforcing cage on a machine - manufacturing is carried out manually, which is very long and laborious and not technologically advanced. The piles, in accordance with the stated solution, have reinforcement distributed along the contour, which makes it possible to use the machine for the manufacture of the frame. Distributed single rods, in contrast to double and triple rods, can be fixed in the machine for the manufacture of frames. The production of such frames is significantly technological - the speed of production increases, manual labor is practically excluded.

The studies carried out have shown that driven reinforced concrete piles of the proposed design have design strength, crack resistance and deformability for the perception of the required forces.

The technical solution has been disclosed above with reference to a specific embodiment. Other embodiments of the technical solution that do not change its essence, as it is disclosed in the present description, may be obvious to specialists. Accordingly, the technical solution should be considered limited in scope only below the following utility model formula.

Claims (1)

A driven reinforced concrete pile containing a concrete barrel made of concrete and a reinforcing cage consisting of longitudinal and transverse reinforcement, characterized in that the reinforcement cage is welded, steel rods are used as longitudinal reinforcement, four of which are located at the corners of the pile, and the other eight are in pairs between corner bars in such a way that the distance between all bars is the same, and as transverse reinforcement - spirals made of steel and welded to the longitudinal reinforcement.

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