RU2539461C1 - Method to expand bridge structure using cable system - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method includes installation of additional elements: amplifying crossbars, pylons, additional transverse and longitudinal beams and cable guys; which are combined with elements of the existing bridge structure. At first the upper part of each support is reinforced with a reinforcing crossbar, afterwards pylons are installed in pairs with crosspieces in the upper part of pylons on side protruding parts of the lower parts of supports, in the area of main vertical beams. Then they install additional transverse beams and cover them with additional longitudinal beams, then they install devices for fastening of cable guys, afterwards they tighten and fix cable guys, and then lay the door surface and install barriers.

EFFECT: invention provides for the possibility to expansion and reinforcement of a bridge structure without termination of its operation.

2 cl, 7 dwg

Description

The invention relates to bridge construction and can be used in the reconstruction of bridges.

Previously proposed methods for repairing and broadening a bridge structure greatly complicate or completely block its use, in addition, these methods often take a long period of time and only the proposed method, developed on the basis of new technologies using modern materials, will make it possible to repair very complex bridge structures in the shortest possible time. terms with high quality and, most importantly, without stopping the movement on the bridge.

Known invention No. 1346722, IPC E01D 21/00 "Method for strengthening and broadening of reinforced concrete beam span of the bridge." This invention is intended for use in the broadening and strengthening of reinforced concrete beam spans of bridges. The purpose of the invention is to increase the bearing capacity of the bridge. The broadening and strengthening of the reinforced concrete span of the bridge is as follows. The extreme beams are removed from the existing span, lowering the level of support underneath them either by making recesses in the head of the supports, or by appropriate replacement of the supporting parts, prefabricated reinforced concrete beams of a greater height of an asymmetric T-section, where the width of the outer cantilever overhang of the shelf is larger, are laid the width of the internal overhang of the shelf, in which there are vertical through windows, and having windows, the overhangs of the shelves are located above the existing span with azor relative to its upper surface, after which they form a new carriageway by combining the beam overhangs with each other, and to combine the installed beams with the existing span, openings in the existing span are made, coaxial to the windows in the overhangs of the shelves, install anchor fasteners in them and fill the holes and windows are solid material.

The invention is known No. 1571126, IPC E01D 7/02 "Extended span of the bridge." The design includes the main beams, the reinforced concrete slab of the roadway combined with them, the brackets mounted on the main beams and the broadening blocks of the roadway slab mounted on them. Each broadening block is made in the form of a pair of runs, combined on top of a metal sheet. The girders of the broadening blocks closest to the roadway slab are equipped with supporting tables located under the protrusions of the cantilever overhangs of the reinforced concrete slab with a gap relative to its lower edge, into which the wedging pads are installed. The device provides the possibility of use for spans with a slab having cantilever overhangs with cutouts for fastening paving blocks.

Closest to the claimed invention is the invention No. 1474205, IPC E01D 21/00 "Method for widening the split bridge". The invention relates to bridge construction and can be used to widen split bridges and overpasses. The purpose of the invention is to simplify the production of works and increase the bridge size. A method for widening a drawbridge involves lifting an existing span with hoisting mechanisms installed on adjacent sections with the existing span using inventory beams and frames that encircle the existing span, fixing it in a raised position using temporary supports installed under the inventory beams, installing on the head of each support of prefabricated elongated overhead crossbars, divided in width by two sections symmetrical with respect to the support, lowering the existing span structure before it rests on the corresponding pair of sections of crossbars of adjacent supports, combining sections of each crossbar with each other, installation of additional attached elements.

The disadvantage of this method is that the method requires the termination of operation of the bridge structure, huge labor costs to raise the span, in addition, this method provides the broadening of only short bridges or requires cutting the span.

The technical task of this invention is to provide the possibility of broadening and strengthening of the bridge structure without stopping its operation.

The technical result is achieved due to the fact that on the bridge structure to be reconstructed, where the bridge structure contains at least supports, transverse beams, longitudinal beams and main vertical beams, additional elements are installed: reinforcing crossbars, pylons, additional transverse and longitudinal beams and guys; which combine with elements of the existing bridge structure. First, the upper part of each support is reinforced with a crossbar, after which pylons with cross members in the upper part of the pylons are installed in pairs on the side, protruding parts of the lower parts of the supports, in the region of the main vertical beams, then additional transverse beams are installed and they are covered with additional longitudinal beams, then they install the cable-staying devices, then pull the cable-ties and fasten it, and then lay the road flooring and install the guards.

The claimed invention is illustrated by drawings, where:

Figure 1 presents an image of a fragment of a bridge structure to be reconstructed.

Figure 2 presents the image of a fragment of a bridge with installed pylons.

Figure 3 presents an image of a fragment of a bridge structure with installed pylons and partially installed additional transverse and longitudinal beams.

Figure 4 presents the image of a fragment of a bridge structure with installed pylons, partially installed additional transverse and longitudinal beams and tensioned cables.

Figure 5 presents a schematic representation of a cross section of a reconstructed bridge with a support, a transverse beam and the main vertical beams.

6 is a schematic cross-sectional view of a reconstructed bridge with a reinforced support, a transverse beam, main vertical beams and installed pylons.

Fig. 7 is a schematic cross-sectional view of a reconstructed bridge with a reinforced support, a transverse beam, main vertical beams, additional transverse beams, road flooring, installed pylons, tensioned cables and a guard.

The proposed method of broadening the bridge structure 1 using the cable-stayed system 2 provides the possibility of broadening and strengthening of the bridge structure 1 containing at least supports 3, transverse beams 4, longitudinal beams 5 and main vertical beams 6 (see figures 1, 2, 3 , 4, 5, 6, 7).

The method includes the installation of additional elements: reinforcing crossbars 7, pylons 8, additional transverse beams 9 and additional longitudinal beams 10 and cables 11, which are combined with elements of an existing bridge structure (see Fig. 4, 5, 6, 7)

In this case, first, the upper part 12 of each support 3 is reinforced with a reinforcing bolt 7 (see Figs. 5, 6, 7).

Then, on the lateral, protruding parts 13 of the lower parts 14 of the supports 3, in the region of the main vertical beams 6, pylons 8 with cross members 15 are installed in pairs in the upper part 16 of the pylons 8 (see Figs. 5, 6, 7).

Then install additional transverse beams 9 and cover them with additional longitudinal beams 10 (see Fig.7).

Next, the mounting devices of the cables 17 are installed, then the cables 11 are pulled and fastened (see FIGS. 4, 7).

Then lay the road flooring 18 and install the fence 19 (see Fig.7).

The proposed method of broadening the bridge structure using the cable-stayed system allows the reconstruction of the bridge by broadening the road part symmetrically on both sides, as well as strengthening the bridge structure by reinforcing the existing supports and, as a result, obtaining additional vehicle passageways, practically eliminating the transmission of influence from the broadened sections of the bridge structure and additional automobile loads on the existing bridge structure by transferring these additional loads through pylons on reinforced supports.

To perform such a reconstruction of the bridge structure 1 perform the following steps:

1. first, the upper part of each support 3 is reinforced with a reinforcing bolt 7, while the reinforcing bolt 7 is superimposed and tightly fastened on both sides of the upper part 12 of the support 3, the reinforcing bolt 7 can be made of metal;

2. Then, on the lateral, protruding parts 13 of the lower parts 14 of the supports 3 in the region of the main vertical beams 6, pylons 8 with cross members 15 are installed in pairs in the upper part 16 of the pylons 8, the pylons 8 are installed in such a way that the main vertical beams 6 are adjacent to the inner side pylons 8;

3. then install additional transverse beams 9, and they are set so that they pass under the transverse beams 4 and protrude from both sides at the same distance from the ends of the transverse beams 4;

4. Then, the protruding parts of the additional transverse beams 9 are covered with additional longitudinal beams 10 in the longitudinal direction relative to the bridge structure 1, thereby obtaining two additional symmetrical traffic lanes on both sides of the reconstructed bridge structure 1;

5. Next, the fastening devices 17 of the cable 11 are installed on the roadway in the line of the installed pylons 8, the fastening devices 17 being located one after the other symmetrically from both sides at a calculated distance from each other;

6. after this, the cables 11 are pulled, throwing over the head of the pylon 8, then the cables 11 are fixed in the fastening devices 17;

7. Then lay the road flooring 18, which can be made of cast asphalt concrete and crushed stone and mastic asphalt concrete, then install fences 19 on both sides of each of the newly formed carriageways.

The list of positions:

1. Bridge construction

2. Byte system

3. Prop

4. Crossbeam

5. Longitudinal beam

6. The main vertical beam.

7. Reinforcement bolt

8. Pylon

9. Additional crossbeam

10. Additional longitudinal beam

11. The guy

12. The upper part of the support

13. The side protruding part of the support

14. The lower part of the support

15. Cross member

16. The upper part of the pylon

17. Cable-staying device

18. Road flooring

19. Fencing.

Claims (2)

1. A method of broadening a bridge structure using a cable-stayed system, where the bridge structure contains at least supports, transverse beams, longitudinal beams and main vertical beams, including the installation of additional elements and combining them with elements of an existing bridge structure,
characterized in that
as additional elements use: reinforcing crossbar, pylons, additional transverse and longitudinal beams and cables, while first the upper part of each support is reinforced with a crossbar, after which pylons are installed on the side, protruding parts of the lower parts of the supports, then additional cross beams are installed and covered with their additional longitudinal beams, then the cable-staying devices are installed, then the cables are pulled and fastened, and then the road flooring is laid and the fence is installed Eden. 2. The method according to claim 1, characterized in that the pylons are installed in pairs in the region of the main vertical beams, while a cross member is installed between the paired pylons in their upper part.

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