RU2609510C1 - Method of increase of bearing capacity of bridge support body - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method for increasing the bearing capacity of the bridge support body includes drilling of grooves along the outer circumference of the element to be strengthened, installation of rods, installation of enclosing strands, their bracing and applying of polymer solution. The grooves are drilled in the bottom of the support along its outer circumference, and the number of recesses is calculated from the bearing ability of the support. Then the calculated amount of holes is drilled in the support body and anchors are arranged in them. Into the grooves drilled in the bottom of the support, the reinforcing profile rods are glued, their length is no less than the support height. The rods are fixed on the support body by the anchors installed earlier. Before installing the enclosing strands made of high-strength reinforcement, the level of their installation is calculated. After that, at this level the additional anchor blocks are installed which are fixed on a support body with reinforcement anchors. Then the enclosing strands are installed and pulled together by jacks, and their ends are fixed on the anchor blocks and tightened by collet anchors. Then, the resultant structure consisting of the support itself, the rods of reinforcing profile and bundling enclosing strands is covered, for example, by guniting, with layers of the polymer solution of special composition.

EFFECT: strengthening of reinforced concrete massive supports of bridges.

3 dwg

Description

The invention relates to the field of construction, and in particular to a method for strengthening reinforced concrete massive supports of bridge structures.

Known patent for the invention of the Russian Federation No. 2359094 IPC E04G 23/02 "Device for reinforcing reinforced concrete beams". A device for reinforcing reinforced concrete beams, including two metal profiles connected to the reinforced beam with supports and struts, characterized in that to the metal profiles located on the sides of the reinforced beam, threaded rods with transverse beams fixed to them are welded to the ends, struts in the form of metal beams with holes are mounted on threaded rods vertically welded to metal profiles, the supports are made in the form of U-shaped clamps wrapping around the beam from eleme connected to welding comrade suspension.

Closest to the claimed invention is the invention of the Russian Federation patent No. 2385400, IPC E04H 12/28 "Device for reinforcing chimney reinforced concrete pipes". A device for reinforcing damaged reinforced concrete chimneys, formed by a structure covering the pipe from the outside, characterized in that the device consists of supporting metal rings covering the pipe from the outside and secured with tie bolts; racks are installed between the supporting rings, some of which are hydraulic or thermal jacks to create the necessary effort and screw jacks to fix the created force. Along the perimeter of the pipe in places of thickening of the pipe section, annular recesses are cut into which the support rings are installed and tightened with bolts, racks with hydraulic or thermal jacks and racks with screw jacks are mounted between the rings, while the racks alternate through one. According to the results of the pipe damage inspection, the required total force and displacement under the influence of jacks are determined, the achieved displacement is fixed by screw jacks.

The disadvantages of this method is the insufficient amplification of a damaged reinforced concrete object.

The task of the invention is to increase the bearing capacity of the body of the support of the bridge structure.

The problem is solved due to the fact that the method of increasing the bearing capacity of the body of the support of the bridge structure includes drilling recesses around the outer circumference of the reinforced object, installing rods, installing grasping strands, pulling them together and applying a polymer solution. In this case, the recesses are drilled at the base of the support along its outer circumference, and the number of recesses is calculated based on the bearing capacity of the support. Next, the calculated number of holes in the support body is drilled and anchors are installed in them. Recesses drilled at the base of the support are glued with reinforcing bar rods, the length of which is not less than the height of the support. The rods are fixed to the support body with anchors installed earlier. Before installing the strands made of high-strength reinforcement, the level of their installation is calculated. After this level, additional anchor blocks are installed, which are fixed on the support body with reinforcing anchors. Next, clasp strands are installed and pulled together with jacks, and their ends are fixed on the anchor blocks and tightened with collet anchors. After that, the resulting structure, consisting of the support itself, the reinforcing bar rods and the tightening strapping strands, is coated with, for example, layers of a polymer solution of a special composition by means of a torcrete method.

The essence of the invention is illustrated by drawings where:

In FIG. 1 is a view of a support body with installed rods, anchor blocks, and clasping strands.

In FIG. 2 - a fragment of the body of the support with the installed anchor block and clasping strand.

In FIG. 3 is a top view of the support structure of a bridge structure with increased bearing capacity.

The essence of the claimed invention is that:

1. The method of increasing the bearing capacity of the body of the support 1 of the bridge structure includes drilling recesses 2 along the outer circumference of the reinforced object, installing rods 3, installing clasping strands 4, pulling them together and applying polymer solution 5. (see Fig. 1)

2. In this case, the recesses 2 are drilled at the base 6 of the support 1 along its outer circumference, and the number of recesses 2 is calculated based on the bearing capacity of the support 1. (see Fig. 1, 3)

3. Next, the calculated number of holes 7 in the body of the support 1 is drilled and the anchor 8 is installed in them. (See Fig. 1)

4. Then, in the recesses 2, drilled in the base 6 of the support 1, glued the rods 3 of the reinforcing profile, the length of which is not less than the height of the support 1. (see. Fig. 1, 3)

5. After that, the rods 3 are fixed on the body of the support 1 with anchors 8 previously installed, (see Fig. 1)

6. Prior to the installation of the clasping strands 4 made of high-strength reinforcement, the level of their installation is calculated (see Fig. 1)

7. Then, at this level, additionally install anchor blocks 9, which are fixed on the body of the support 1 with reinforcing anchors 10. (see. Fig. 1, 2)

8. Next, set the clasp locks 4 and tighten them by means of jacks (not shown in Fig.), And their ends are fixed on the anchor blocks 9 and tightened with collet anchors 11. (see Fig. 1, 2)

9. Then, on the obtained structure, consisting of the support 1 itself, the reinforcing profile rods 3 and the tightening strand strands 4, for example, layers of a polymer solution 5 of a special composition are applied by means of torchetics (see Fig. 3)

Impacts that the supports carry:

- stretching (eccentric and central direction);

- transverse, as well as the moment of bending.

- compression, including eccentric;

- the support also takes on the load from the beams and plates connected to it, in addition to its mass and load from each vehicle, pedestrian, etc.

Given the above listed effects, with an increase in the bearing capacity of the support body, the proposed method is most effective.

When reinforcing structures, spraying of concrete mixture (torqueting) is used, which can be carried out by a formless method.

When formworkless concreting is created, a coating of a given thickness is created by spraying on the central parts of the repaired and reinforced massive structures, whose surface is used as a one-sided and only formwork. The formless method is used when creating protective layers on existing structures, erecting structures in the ground.

The thickness of the spray is chosen depending on its purpose, the state of the surface of the structure, as well as the nature of the possible deformations and is made in one or more layers of spray concrete. The number of layers and thickness are determined by the project. In the proposed method, a thickness of 60-120 mm is recommended.

As reinforcement in the manufacture of structures, reinforcing bar rods are used. In order to ensure good enveloping of the reinforcement with polymer mortar / concrete mix, the rods should be immersed in its layer by at least 2 cm.

When repairing and reinforcing particularly loaded structural elements of a structure, the reinforcement of the support body should be connected to the reinforcement of spray concrete using hooks, anchors, welding or clamps.

Anchors in the body of the support can be installed, for example, by drilling holes and installing anchors, either using a mounting gun or in any other convenient way at this facility.

After spraying (gunning) the polymer composition, the surface should be smoothed, for example, with a plaster spatula.

Industrial applicability is that for the implementation of the proposed method using well-known equipment used in various fields and not requiring additional manufacture and refinement.

All of the above indicates a solution to the problem, namely: an increase in the bearing capacity of the support body of the bridge structure.

List of items

1. Prop body

2. Recesses at the base of the support

3. The rods

4. Bound strands

5. Polymer solution

6. The base of the support

7. Holes

8. Anchor

9. Anchor blocks

10. Reinforcing anchor

11. Collet Anchor

a) A fragment of the body of the support with the anchor block

Claims (3)

A method of increasing the bearing capacity of the bridge support structure, including drilling recesses around the outer circumference of the reinforced object, installing stranding strands and pulling them, characterized in that the recesses are drilled at the base of the support along its outer circumference, while the number of recesses is calculated based on the bearing capacity of the support, then the calculated number of holes in the body of the support is drilled and anchors are installed in them, and the reinforcing bars are glued into the recesses drilled at the base of the support, length which are not less than the height of the support, and the rods are fixed on the body of the support with anchors installed earlier, while the level is calculated before installing the clasp locks made of high-strength reinforcement installations, after which additional anchor blocks are installed at this level, which are fixed on the support body with reinforcing anchors, and then the clasp locks are installed and pulled together with jacks, and their ends are fixed on the anchor blocks and tightened with collet anchors, after which the resulting structure consisting of from the support itself, rods of the reinforcing profile and tightening clasping strands, layers of a polymer composition of a special composition are applied, for example, by means of a torcrete method.

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