KR100368138B1 - A method for reinforcing the slab bridge - Google Patents

Abstract

The present invention relates to a slab bridge reinforcement method to fundamentally increase the load capacity of the bridge by mounting a beam in the lower portion of the slab bridge, the configuration will be described as follows.

A pedestal installation process for mounting a plurality of pedestals on the lower side of the slab that is the inner side of the alternating and piers, a beam installation process for placing both ends of the beam on the upper surface of the pedestal, and the beam and the slab so that the slab and the beam can be integrated To raise the slabs together, to inject adhesive between the bottom of the slab and the top of the beam while lifting the slab and the beam, and to support the load of the slab on the top of the pedestal evenly. It is characterized in that it consists of a step device installation process for installing a chair device, and the slab and the beam raised in the upper plate lifting process to lower the top plate lowering process to put both ends of the beam on the top of the chair device.

Description

A method for reinforcing the slab bridge}

The present invention relates to a slab bridge reinforcement method using a reinforced concrete slab, and more particularly, to a slab bridge reinforcement method to fundamentally increase the load capacity of the bridge by mounting a beam in the lower portion of the slab bridge.

In general, a slab bridge refers to a bridge in which a slab is placed between a bridge and a bridge or between a bridge and a bridge, and the slab is usually manufactured by pouring and curing reinforced concrete.

Particularly, when constructing slab bridges, first construct shifts and piers vertically from the ground, install formwork between shifts and piers or piers and piers, and then reinforce the reinforcement to reinforce and cure concrete. To complete the bridge.

And between the lower portion of the slab and the upper side of the alternating and pier is equipped with a bridge device that can offset the expansion and contraction of the slab.

However, the slab bridge is divided into 1, 2, 3 bridges according to the allowable load of the vehicle moving the upper part of the slab, when the bridge is used for a long time, the grade of the bridge is lowered due to the external factors of the bridge Had

To solve this problem, various methods for reinforcing reinforced concrete slab bridges are known, but most of the methods are used to increase the strength of the slab by reinforcing the concrete section on the upper surface of the slab. There is no way.

Accordingly, the present invention has been invented to solve the above-described problems, and by reinforcing the slab by mounting beams supported on both sides of the alternating bridge and the pier at the lower part of the slab, it has an object to fundamentally increase the load capacity of the bridge.

The present invention for achieving the above object, the installation step of mounting a plurality of pedestal to the lower side of the slab that is the inner side of the alternating and piers, beam installation process to put both ends of the beam on the upper surface of the pedestal, and the slab To raise the beam and the slab together so that the beam and the beam can be integrated together, and to inject the adhesive material between the lower surface of the slab and the upper surface of the beam while the slab and the beam are raised, Lowering the slab and the beam to lower the slab and the beam raised in the upper plate lifting process to install the chair device so as to support the load of the slab on the upper surface evenly on the upper surface of the chair It is characterized by consisting of a process.

1 is a process chart showing the reinforcement method of the present invention.

2 is a schematic view showing a pedestal used in the reinforcement method according to the present invention.

Explanation of symbols for main parts of the drawings

1: shift

2: pier

3: slab

4: pedestal

5: beam

6: adhesive material

7: teaching device

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a process chart showing the process of the reinforcement method of the present invention. First, the method will be described.

A pedestal installation process (see Fig. 1a) for installing the pedestal 4 so that both ends of the beam 5 can be raised below the slab 3 which is the inner side of the shift 1 and the pier 2;

A beam installation process for placing both ends of the beam 5 on the upper surface 41 of the pedestal 4 so that the upper surface 51 of the beam 5 and the lower surface 31 of the slab 3 come into close contact with each other (see FIG. 1B). )and,

A pulling-up process (see FIG. 1C) for pulling up the beam 5 and the slab 3 together so that the slab 3 and the beam 5 can be integrated together;

Adhesive material injection process of injecting the adhesive material 6 between the lower surface 31 of the slab 3 and the upper surface 51 of the beam 5 in the state of lifting the slab 3 and the beam (5) (Fig. 1d),

Step device installation process (see Fig. 1e) to install the device (7) to support the load of the slab 3 on the upper surface of the pedestal evenly,

Finally, the slab 3 and the beam 5, which are lifted in the upper plate pulling process, are lowered, and the slab is cut through the upper plate lowering process (see FIG. 1f) that puts both ends of the beam 5 on the upper portion of the pedestal device 7. It is characterized by the method of reinforcing bridge slabs.

In addition, after completing the above process, by welding to the lower portion of the beam 5 and the upper portion of the bridge device 7, it is possible to increase the mounting force of the beam (5).

This will be described in more detail as follows.

As shown in FIG. 1, the beam 5 is made of I-shaped steel or H-shaped steel, such that the lower surface 52 of the beam 5 may be in close contact with the upper surface of the bridge device 7, and the beam 5 The upper surface 51 of) can be in close contact with the lower surface of the slab (3).

In addition, since the adhesive material is epoxy resin or epoxy mortar, a fine gap formed between the upper surface 51 of the beam 5 and the lower surface 31 of the slab 3 may be prevented. Therefore, it is possible to prevent the microcracks of the slab (3) generated due to the minute gap.

Figure 2 shows a pedestal used in the reinforcement method according to the present invention, the fixing plate 42 is formed with a plurality of fixing holes 421 to be mounted on the inner surface in the alternating (1) or piers (2) And a top plate 41 protruding horizontally in front of the fixing plate 42 to support the beam 5, and mounted between the lower portion of the top plate 41 and the mounting plate 42. It is composed of a plurality of reinforcing ribs 43 to reinforce the bearing force.

And the upper surface of the upper plate 41, the seating device is mounted, the seating device 7 is a pad 71 which is placed on the upper plate 41 of the pedestal 4 and the steel plate mounted on the upper side of the pad 71 ( 72, the upper surface of the steel plate 71 and the lower surface of the beam (5) is in close contact with each other and welded. In particular, since the pad 71 has a high rigidity rubber or resin plate or steel sheet, the pad 71 may offset the stretching or fine movement of the beam 5.

According to the present invention as described above, by increasing the load capacity of the slab constituting the slab bridge can be expected to reduce the budget of the national institution by lowering the accompanying costs due to the construction cost and repair due to the reconstruction of the bridge .

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible.

Claims (7)

A pedestal installation process for mounting a plurality of pedestals in which both ends of the beam are raised at the lower side of the slab which is the inner side of the shift and the piers; A beam installation process in which both ends of the beam are placed on the upper surface of the pedestal so that the upper surface of the beam and the lower surface of the slab are in close contact; The upper plate raising process of raising the beam and the slab together so that the slab and the beam can be integrated together; An adhesive material injection process of injecting an adhesive material between the lower surface of the slab and the upper surface of the beam while the slab and the beam are lifted up, The step of installing the device to install the device so that the top of the pedestal evenly supports the load of the slab, Slab bridge reinforcement method characterized in that it consists of a slab lifted in the upper plate lifting process and the top plate lowering process to put both ends of the beam on the upper portion of the teaching device. The slab bridge reinforcement method according to claim 1, further comprising a beam welding process for welding a lower portion of the beam and an upper portion of the stabilization device after finishing the upper plate lowering process. 2. The method of claim 1, wherein the beam uses I-beams. 2. The method of claim 1, wherein the beam uses H-beams. The method of claim 1, wherein the adhesive material is a slab bridge reinforcement method characterized in that the epoxy resin is used. The method of claim 1, wherein the adhesive material is a slab bridge reinforcement method characterized in that the epoxy mortar is used. The method of claim 1, wherein in the installation process of the chair arrangement, the pad is placed first on the top of the pedestal, and the slab bridge reinforcement method characterized in that the steel plate is installed on the upper side.