KR100478701B1 - Pulling up, repair and reinforcement method for the upper structure of a bridge - Google Patents

Abstract

The present invention is to safely and quickly perform the repair and reinforcement of the bridge in the state that allows the passage of the car or train during the lifting work of the bridge superstructure to repair the bridge device of the bridge, and secure the clearance of the water flow The method relates to (a) optionally mounting brackets on the upper side walls of the piers, or installing temporary supports from the ground on both sides of the piers, taking into account the space between the girder bottom and the top of the piers. And after installing the prefabricated bracket for the bridge to raise the upper structure, the bridge upper structure raising preparation step of installing the jack for raising; (b) a girder sequencing step of connecting both ends of the girders adjacent to each other at the top of the pier with a connection block; (c) raising a bridge superstructure to a predetermined height by using the lifting jack; (d) repairing and reinforcing the bridge, such as replacing a bridge device, expanding a coping unit, or replacing a girder; (e) Provide a method of lifting, repairing, or reinforcing bridge superstructures, which comprises the finishing steps of lowering the raised bridge superstructures and removing brackets, temporary supports or prefabricated brackets.

Description

Lifting, Repair, and Reinforcement of Bridge Superstructures {PULLING UP, REPAIR AND REINFORCEMENT METHOD FOR THE UPPER STRUCTURE OF A BRIDGE}

The present invention relates to a bridge repair and reinforcement method, and more particularly to a method for lifting and repairing a bridge superstructure for carrying out repair and reinforcement of a bridge quickly and safely.

In general, bridge structures are inevitably damaged due to frequent traffic of heavy vehicles or trains and aging due to long-term progress. In particular, bridge devices installed on bridges and bridges are structurally important members that properly absorb the loads on the bridges and transfer them to the undercarriage.

In addition, when the bridge is located in the river, due to the sedimentation of the soil or changes in the environment, the water supply level is insufficient, and the bridge upper structure (top plate, girder) also needs to be raised.

Conventional bridge repair and reinforcement method developed by the inventors of the present invention using a support device that facilitates the installation of the jack jack for lifting in the situation where the space to be secured, the Republic of Korea Patent No. 214387 'jack support for the upper structure of the bridge Device and bridge repair method using the same.

The prefabricated bracket disclosed in the present invention has a simplified structure and is configured to secure a space for placing the jack for raising according to the bridge repair, and is formed at right angles so as to be placed on one side in the width direction of the upper part of the bridge, and is horizontally both ends. One side base plate having horizontal connection plates extending in a predetermined length and width, and the horizontal connection plates facing each other as a shape corresponding to the one base plate, and the other side of the pier upper width direction at a position opposite to the one base plate. It is characterized in that it is configured as a pair of supporting irons having the other side base plate and the supporting plate body protruding horizontally on the outside of the one side and the other base plate, respectively. By using the prefabricated bracket, it is possible to easily raise the bridge upper structure even in the situation where the geometry space is not secured.

However, when the lifting operation is performed using the lifting jack, as the support point supporting the girders moves to the outside of the piers, the girder between the support points carries an unexpected load, and the girder may fall off or collapse when the vehicle or train passes. There is this. That is, since the support point originally supported by the stapling device is replaced by the impression jack, the inner side of the support point (the facing direction of the adjacent girder) is vulnerable structurally by acting as a kind of cantilever.

In addition, since the work is performed while allowing the vehicle to pass, the girder may be separated by the continuous impact load of the vehicle or the train, and a large accident may occur.

In particular, in the case of railroad bridges, there is a limitation that construction must be performed by using a short time when a train does not operate, and thus a method for quickly completing work is required.

An object of the present invention is to repair and reinforce bridges safely, quickly in a state that allows the passage of vehicles or trains in the repair of bridges, replacement of bridges and repair of bridges to secure water supply, and reinforcement work. To provide a method for performing this.

In order to achieve the above object of the present invention, the present invention, in consideration of the space between the lower surface of the girder and the upper surface of the pier selectively installs a bracket on the upper side walls of the pier, or a temporary support from the ground on both sides of the pier After installing the prefabricated bracket for raising the bridge superstructure on the upper surface of the bridges and bridges, the bridge superstructure lifting preparation step of installing the jack for raising, and both ends of the girder adjacent from the upper part of the bridge as a connection block Connecting, pulling up the bridge to a predetermined height using the lifting jack, performing repair and reinforcement work such as replacing a bridge device, expanding a coping part, or replacing a girder, and an elevated bridge upper structure The cutting step is to reduce the size, remove the bracket, temporary support or prefabricated bracket, etc. and enlarge the coping section. It provides an upper structure seungsang method and maintenance of the bridge using the same reinforcing method.

The above and other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings.

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

(Example 1)

1A to 1E sequentially show examples of applying a repair and reinforcement method of a bridge according to a first embodiment of the present invention to a steel girder type railway bridge.

As shown, the repair and reinforcement method of the bridge according to the first embodiment, the preparation step for raising the upper structure, the step of sequencing the girder, raising the upper structure, the replacement of the bridge device and / Or it consists of repair, reinforcement step, and finishing step, such as reinforcing coping part.

(a) Preparing to raise the bridge superstructure

First, if enough space is provided between the girder lower surface of the bridge superstructure and the upper surface of the bridge, that is, the space, the installation jack should be installed on the upper surface of the bridge. The upper structure will be raised, otherwise the brackets may be selectively installed on the upper side walls of the piers, temporary supports from the ground on both sides of the piers, or the prefabricated brackets disclosed in the above-mentioned Patent No. 214387. Perform preparatory steps to raise the structure.

Figure 1a shows an example of applying the patent No. 214387 registered by the inventor. As shown, by mounting and assembling one side and the other base plate 210 around the bridge devices 120 located on the upper portion of the pier 100, each of the upper structures 300 directly under the girders 310 and 320. The support devices 220 and 230 are installed to be positioned at the support device, and the jacks 250 for raising the support devices 220 and 230 are placed on the support devices 220 and 230 so as to face the upper structure. Unexplained symbol '330' is a sleeper, '340' is a rail.

(b) girder sequencing step

As described above, when the preparation step for pulling the superstructure is completed, as shown in FIG. 1B, both ends of the adjacent girders 310 and 320 are connected to the connection block 360. The reason why the girder is connected to the connection block 360 to be continuous is that the girder inside the support point cantilevered as the support point of the girder moves to the outside of the piers. In addition, in the case of multi-span bridges, if all the girders are sequential and subsequent work is performed, repair and reinforcement of the bridge can be performed more quickly and safely.

3 illustrates a connection block 360 applied to the present invention. As shown in the drawing, the connection block 360 welds the stiffeners 362 to the rectangular plate 364 at regular intervals. The plate 364 between the stiffeners 362 is bolted to the girder and bolts 368. ) Are formed in large numbers. The plate 364 is bolted to the girders 310 and 320 through the elastic pad 366.

On the other hand, it is preferable to further install a vertical reinforcement on the girder surface corresponding to the center line of the lifting jack 250 rod to increase the stiffness of the girder during the bridge pulling operation to be described later to prevent damage.

(c) bridge raising stage

Upon completion of the girder, the superstructure is then raised to a predetermined height, as shown in FIG. 1C. As a pulling method, a pulling jack (hydraulic jack) is connected to a hydraulic pump by a hydraulic hose to raise it by the span, or the Korean patent application No. 10-2001-0006396 filed by the present applicant controls the movement of a large structure. It is possible to raise all span girders simultaneously using the system.

Briefly describing the present invention, the height of the bridge, the speed, etc. are input to the computer control device, and the bridge lifting jack is precisely lifted by the automatic measurement operation control, it is possible to safely raise the bridge.

According to this, the lifting work of the bridge superstructure can be performed automatically, so it is possible to simultaneously raise or disproportionately raise the precise operation, which can prevent damage to the structure and reduce the risk caused by the impossible of conventional simultaneous impression. This makes it possible to raise inequality.

In addition, it can automatically control the progress and maintenance of the operation, it does not require a lot of manpower, can be maintained at night and eliminate the risk of major accidents.

(d) repair and reinforcement steps

As in the above step, the upper structure of the bridge is raised to a predetermined height, and then the repair of the bridge device, the repair of the coping part damaged portion, the pier lifting operation, and the like are performed. In FIG. 1D, a girder lifting operation for securing a water supply margin is shown as an example. According to the present embodiment, the method of securing a water supply margin adopts a method of elevating the height of the girder from the surface by placing the mortar 140 at a predetermined height on the upper part of the pier 100 and installing a new teaching device thereon. It was.

(e) Finishing step including dismantling of impression device

When the installation work of the new teaching device is completed as described above, as shown in FIG. 1E, the upper structure is lowered as a finishing step, the prefabricated bracket and the lifting jack are removed, and the newly installed seat mortar ( The concrete is poured on the left and right sides of the bridge to enlarge the cross section of the upper part of the piers.

As described above, the repair and reinforcement method of the bridge according to the first embodiment of the present invention can perform the repair and reinforcement method of the bridge more quickly and safely by girder continuity.

(Example 2)

2A to 2F illustrate examples of applying the repair and reinforcement method of the bridge according to the second embodiment of the present invention to a railway bridge of a girder type in order. As shown, the repair and reinforcement method of the bridge according to the second embodiment provides a quick and safe method of replacing the device and the girder replacement method.

In detail, after performing the bridge superstructure raising preparation step (FIG. 2A) and the girder sequencing step (FIG. 2B) as in the first embodiment, as shown in FIG. The girders 310 and 320 are supported by using the jacks for raising 250 to proceed.

Next, as shown in Figure 2d, by cutting the lower surface of the girder (310, 320) to a predetermined height to secure the work device replacement work space. That is, the vertical reinforcement 350 is installed on the girder 310 and 320 surfaces corresponding to the rod center line of the lifting jack 250, and the lower portions of the girders 310 and 320 between the vertical reinforcement 350 are disposed. After cutting to a predetermined height, the lower end of the girder cut surface is reinforced with the reinforcing material 370. Here, the reinforcing material 370 is used to prevent the deformation of the girder due to welding (residual stress) by using a 'b' shaped steel and bolted to the existing girder.

Next, as shown in Figure 2e to install a new teaching device using the space secured.

Lastly, as shown in FIG. 2F, the existing upper structure 300 is removed, and the new upper structure 400 having a low mold height is installed, and then the cross section of the coping part of the piers is performed. That is, unlike the first embodiment, instead of using the existing girder as it is, the height of the lower part of the girder is raised from the surface or the ground by replacing the girder with a low mold height.

Figures 4a, 4b is due to the vehicle lateral load applied to the bridge by the vibration in accordance with the running of the train in the girder sequencing step (b) of the first and second embodiments and / or the centrifugal force generated when the train travels on a curved section Since the raised bridge may move away from the bridge by moving in the lateral direction, in order to prevent this, fixed blocks 390 are installed outside the side surfaces of the girders 310 and 320.

As shown in FIG. 5, the fixed block 390 welds the stiffeners 396 having a substantially triangular shape at regular intervals on the base plate 392, and the side plates 394 are disposed on the vertical surfaces of the stiffeners 396. Welded. In addition, a plurality of bolt fastening holes 398 are formed on the surface of the base plate 392 between the stiffeners 396 to bolt the fixed block 390 to the piers.

As described above, according to the present invention, the bridge upper structure of the bridge pier, coping unit, the bridge device for the repair and reinforcement of the bridge to ensure the clearance of the water, the passage of the vehicle or train during reinforcement work quickly and safely It is possible to elevate and, in that state, there is an effect that can efficiently perform the desired repair, reinforcement method.

Although the present invention has been described with reference to the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will include any modifications or variations that fall within the spirit of the invention.

1a to 1e is a process diagram applying the lifting, repairing, reinforcing method according to the first embodiment of the present invention to a steel girder type railway bridge.

Figure 2a to 2f is a process chart applying the lifting, repair, reinforcement method according to the second embodiment of the present invention to the girder type railway bridge.

3 is a perspective view of a connecting block applied to the present invention.

Figure 4a is a side view showing a third embodiment of the present invention.

4B is a front view of FIG. 4A.

5 is a perspective view of a fixing block applied to the third embodiment of the present invention.

<Explanation of Signs of Major Parts of Drawings>

100: pier 120: bridge device

140: mortar mole 210: prefabricated bracket

230: base plate 250: jack for impression

300: bridge superstructure 310: girder

350: vertical reinforcement 360: connection block

370: reinforcement 390: fixed block

Claims (4)

(a) Considering the space between the lower side of the girder and the upper side of the piers, optionally install brackets on the upper side walls of the piers, install temporary supports from the ground on both sides of the piers, or raise the bridge superstructure on the top of the piers. After the prefabricated bracket is installed, the bridge upper structure lifting step of installing the jack for raising; (b) girder sequencing, connecting both ends of adjacent girders at the top of the piers with connecting blocks; (c) raising a bridge superstructure to a predetermined height by using the lifting jack; (d) repairing and reinforcing the bridge, such as replacing the bridge device, expanding the coping unit, or replacing the girder; And (e) Lifting, repairing, and reinforcing bridge superstructures comprising the steps of reducing the raised bridge superstructures and removing brackets, temporary supports, or prefabricated brackets, and then expanding the cross section of the upper part of the bridges. The method of claim 1, If the steel girder in the step (b) step of installing a vertical reinforcement on the girder surface corresponding to the center line of the jack jack for lifting, the lifting and repair of the bridge superstructure, characterized in that it further comprises. The method of claim 2, After the step (c), after the lower portion of the girder between the vertical reinforcement to a predetermined height, further comprising the step of reinforcing the lower end of the girder cut surface bridge lifting and repair, reinforcement method The method of claim 1, Wherein step (b) further comprises the step of installing a fixed block for preventing the transverse movement of the girder bridge superstructure lifting and repair, reinforcement method.