Bridge deck repair construction method

Abstract

The present invention relates to a method for repairing a bridge deck. The present invention comprises the steps of: establishing a removal area of ​​the bridge deck corresponding to the girder of the bridge to include a damaged portion of the bridge deck; removing the removal area of ​​the bridge deck such that a portion of the reinforcing bar of the bridge deck is left exposed to form a removal space; placing a concrete panel that doubles as formwork between the girder to cover the lower portion of the removal space of the bridge deck; placing reinforcing bars in the removal space of the bridge deck; and pouring concrete into the removal space covered by the concrete panel that doubles as formwork. According to the present invention, when a portion of the bridge deck is damaged and needs repair, the repair work is simplified, thereby ensuring the safety of the repair work.

Description

Technology Field

[0001] The present invention relates to a method for repairing bridge deck slabs. Background Technology

[0002] Generally, a bridge comprises abutments installed at the starting and ending points where the bridge is constructed, pier(s) installed between the abutments, girders spaced apart in the width direction between the abutments and piers or between piers, bridge decks constructed on the upper surfaces of the girders, and bridge guardrails installed on both sides in the width direction of the bridge decks, and depending on the size or shape of the bridge, median strips, handrails, curbs, etc. are additionally provided on the bridge decks.

[0003] Among bridges with a long service life, while some possess sufficient load-carrying capacity, a significant number of others suffer from damage such as cracks or rebar corrosion, resulting in insufficient load-carrying capacity and causing serious problems regarding safety and serviceability. Even in the case of bridges with a short service life, load-carrying capacity may deteriorate in areas where the load is concentrated due to design errors or poor construction. In particular, since the early 2000s, the deterioration of concrete bridges has become severe due to changes in snow removal methods, leading to an intensified decline in load-carrying capacity in bridge decks and piers.

[0004] When a portion of a bridge deck is damaged and requires repair, conventionally, the damaged part (area) of the bridge deck is removed, formwork is installed on the removed section, concrete is poured, and cured to repair the damaged portion of the deck.

[0005] However, this conventional method has the problem of being complex to construct and having a high risk of accidents because formwork is installed on a damaged part of the bridge deck and then removed after the concrete poured in the part where the formwork is installed has cured. In particular, when the bridge piers are high, the work of installing and removing formwork becomes more difficult and dangerous. The problem to be solved

[0006] The objective of the present invention is to provide a bridge deck repair construction method that simplifies and ensures safe repair work when a part of the bridge deck is damaged. means of solving the problem

[0007] To achieve the objective of the present invention as described above, a method for repairing a bridge deck is provided, comprising the steps of: setting a removal area of ​​the bridge deck between the girders of the bridge to include a damaged portion of the bridge deck; removing the removal area of ​​the bridge deck such that a portion of the reinforcing bar of the bridge deck is left exposed to form a removal space; placing a concrete panel that serves as a formwork between the girders to cover the lower portion of the removal space of the bridge deck; placing reinforcing bars in the removal space of the bridge deck; and pouring concrete into the removal space covered by the concrete panel that serves as a formwork.

[0008] It is preferable that the removal area of ​​the above bridge deck be rectangular.

[0009] Preferably, a portion of the girder in the width direction is exposed within the removal space of the bridge deck, and a certain distance is exposed from one end face in the width direction of the girder, and the exposed distance of the girder is 50 to 100 mm.

[0010] It is preferable that the above formwork-compatible concrete panel comprises a square concrete plate having a uniform thickness and a plurality of connecting members that are vertically penetrating and connected to the reinforcing bar.

[0011] The above formwork-cum-concrete panel may be composed of multiple unit formwork-cum-concrete panels arranged in a row. Effects of the invention

[0012] The present invention forms a removal space by removing a removal area of ​​a bridge deck including a damaged portion of the bridge deck, covers the bottom of the removal space of the bridge deck with a concrete panel that doubles as formwork, places reinforcing bars in the removal space of the bridge deck, and pours and cures concrete in the removal space covered by the concrete panel that doubles as formwork to repair the damaged portion of the bridge deck. As a result, the work of installing a separate formwork to pour concrete in the removal space and removing the formwork is eliminated, as well as the use of equipment supporting the formwork is eliminated, thereby simplifying the repair work on the damaged portion of the bridge deck and reducing the risk of accidents, and shortening the bridge repair time, thereby shortening the time required to control traffic on the bridge.

[0013] In addition, the present invention covers the lower part of the removal space where the damaged portion of the bridge deck has been removed with a concrete panel that doubles as formwork, by placing both ends of the concrete panel that doubles as formwork on the ends of the two girders exposed in the removal space of the bridge deck, thereby firmly supporting the concrete being poured when concrete is poured on the upper side of the concrete panel that doubles as formwork and in the removal space.

[0014] In addition, when connecting members are provided on the upper surface of a concrete panel that doubles as a formwork, the connecting members and reinforcing bars are connected and reinforced, and the reinforced bars are connected to the exposed reinforcing bars of the existing bridge deck, thereby ensuring a solid connection with the existing bridge deck. Brief explanation of the drawing

[0015] FIG. 1 is a flowchart illustrating an embodiment of a bridge deck repair construction method according to the present invention. FIG. 2 is a front view illustrating a state in which a removal area is set, constituting an embodiment of a bridge deck repair construction method according to the present invention. FIG. 3 is a plan view illustrating the state of setting a removal area constituting an embodiment of the bridge deck repair construction method according to the present invention. FIGS. 4, 5, and 6 are front views sequentially illustrating each step constituting an embodiment of the bridge deck repair construction method according to the present invention, FIG. 7 is a front view illustrating an example of a side view of a bridge deck removal space constituting an embodiment of a bridge deck repair construction method according to the present invention. FIG. 8 is a side view illustrating another example of a concrete panel that doubles as a formwork, constituting an embodiment of the bridge deck repair construction method according to the present invention. Specific details for implementing the invention

[0016] Hereinafter, an embodiment of the bridge deck repair construction method according to the present invention will be described with reference to the attached drawings.

[0017] As illustrated in FIGS. 1, 2, and 3, an embodiment of the bridge deck (10) repair construction method according to the present invention first proceeds with a step (S10) of setting a removal area (12) of the bridge deck (10) corresponding to between the girders (20) of the bridge so as to include a damaged portion (11) of the bridge deck (10).

[0018] That is, if there is a damaged portion (11) of the bridge deck (10), not only is the damaged portion (11) of the bridge deck (10) removed, but the entire area between the girders (20) located on both sides of the damaged portion (11) is set as a removal area (12).

[0019] The removal area (12) of the bridge deck (10) is preferably rectangular. The removal area (12) is preferably marked with a line on the bridge deck (10).

[0020] A removal area (12) is set on the bridge deck plate (10), and then the removal area (12) of the bridge deck plate (10) is removed, but a portion of the reinforcing bar (13) of the bridge deck plate (10) is removed so that it is left exposed, thereby forming a removal space (S20) (see FIG. 4).

[0021] That is, the concrete and rebar in the removal area (12) of the bridge deck (10) are removed so that the removal area (12) of the bridge deck (10) is penetrated to form a removal space (14). All of the concrete in the removal area (12) of the bridge deck (10) is removed, and the rebar (13) is removed while leaving exposed rebar (13) so that a portion of it protrudes a certain length from the side of the removal space. A portion of the upper surface of the girders (20) on both sides is exposed within the removal space. If the removal area (12) is rectangular, the removal space (14) is formed by four sides (side walls).

[0022] A portion of the girder (20) in the width direction is exposed within the removal space (14) of the bridge deck plate (10), and is exposed at a certain distance from one end of the girder (20) in the width direction, and it is preferable that the exposed distance of the girder (20) from one end of the girder (20) in the width direction is 50 to 100 mm.

[0023] It is preferable that the side of the removal space (14) of the bridge deck (10) be a vertical surface. Meanwhile, the side of the removal space (14) of the bridge deck (10) may be an inclined surface, as shown in FIG. 5. The inclined surface is sloped so that the thickness gradually decreases from the upper surface to the lower surface of the bridge deck (10), and the lower surface of the bridge deck (10) is flat. When the side of the removal space (14) of the bridge deck (10) is an inclined surface, the contact area of ​​the boundary surface is increased when concrete is poured into the removal space (14). It is preferable that the angle of the inclined surface be 45 to 60 degrees from the upper surface of the bridge deck (10).

[0024] After forming a removal space (14) in the bridge deck plate (10), a step (S30) of installing a formwork-cum-concrete panel (30) between the girders (20) to cover the bottom of the removal space (14) of the bridge deck plate (10) is carried out (see FIG. 5).

[0025] In a first embodiment of a concrete panel (30) that doubles as a formwork, the concrete panel (30) that doubles as a formwork comprises a square concrete plate (1) having a uniform thickness and corresponding to the planar area of ​​the removal space (14), and a plurality of connecting members (2) that are vertically connected to the square concrete plate (1) and connected to reinforcing bars.

[0026] It is preferable that the connecting members (32) be arranged in multiple rows along the length of the girder (20).

[0027] The thickness of the square concrete plate (31) is preferably 45 to 55 mm.

[0028] In a second embodiment of the formwork-cum-concrete panel (30), the formwork-cum-concrete panel (30) preferably has a uniform thickness and is in the shape of a square plate corresponding to the planar area of ​​the removal space (14). The thickness of the square plate is preferably 45 to 55 mm.

[0029] As a third embodiment of the formwork-cum-concrete panel (30), as shown in FIG. 6, the formwork-cum-concrete panel (30) may be composed of a plurality of unit formwork-cum-concrete panels (31). The total area formed by arranging the unit formwork-cum-concrete panels (31) horizontally in a row corresponds to the planar area of ​​the removal space (14).

[0030] The unit formwork-cum-concrete panel (31) is formed into a rectangular shape having a uniform width and length. The length of the unit formwork-cum-concrete panel (31) is such that it can be placed between two girders (20).

[0031] For example, both sides of the unit formwork-compatible concrete panel (31) are vertical surfaces.

[0032] For example, on both sides of the unit formwork-compatible concrete panel (31), a locking projection (3) is formed upwardly on one side of the unit formwork-compatible concrete panel (31) in the width direction, thereby forming a locking groove (4) downwardly, and a locking projection (3) is formed downwardly on the other side of the unit formwork-compatible concrete panel (31) in the width direction, thereby forming a locking groove (4) upwardly. As a result, when the unit formwork-compatible concrete panels (31) are arranged in a row in the width direction, the locking projections (3) on the upper side of two adjacent unit formwork-compatible concrete panels (31) engage with the locking grooves (4) on the lower side, thereby increasing the bonding support force.

[0033] It is preferable that a sealing member be provided between the upper surface of the girder (20) on which the formwork-compatible concrete panel (30) is supported and the lower surface of the formwork-compatible concrete panel (30).

[0034] After covering the bottom of the removal space (14) of the bridge deck plate (10) with a formwork-compatible concrete panel (30), a step (S40) of placing reinforcing bars (40) in the removal space (14) of the bridge deck plate (10) is carried out (see FIG. 5).

[0035] The reinforcing bars (40) placed in the removal space (14) of the bridge deck (10) are connected to the reinforcing bars (13) of the existing bridge deck (10) exposed on the side of the removal space (14).

[0036] When connecting members (2) are provided in the formwork-type concrete panel (30), the reinforcing bar (40) placed in the removal space (14) is connected to the connecting members (2).

[0037] After reinforcing bars (40) are placed in the removal space (14) of the bridge deck plate (10), a step (S50) of pouring concrete (50) into the removal space (14) covered by a formwork-type concrete panel (30) is carried out (see FIG. 6).

[0038] It is preferable that the concrete (50) poured into the removal space (14) of the bridge deck plate (10) includes non-shrink concrete.

[0039] Hereinafter, the operation and effects of the bridge deck repair construction method according to the present invention will be explained.

[0040] The present invention involves removing a removal area (12) of a bridge deck (10) that includes a damaged portion of the bridge deck (10) to form a removal space (14), covering the bottom of the removal space (14) of the bridge deck (10) with a concrete panel (30) that doubles as a formwork, placing reinforcing bars (40) in the removal space (14) of the bridge deck (10), and pouring and curing concrete (50) in the removal space (14) that has the bottom covered by the concrete panel (30) that doubles as a formwork, thereby repairing the damaged portion of the bridge deck (10). This eliminates the need for a separate formwork to be installed and removed to pour concrete (50) into the removal space (14), as well as the use of equipment that supports the formwork. Consequently, the repair work on the damaged portion of the bridge deck (10) is simplified, the risk of accidents is reduced, and the time required to repair the bridge is shortened, thereby shortening the time required to control traffic on the bridge.

[0041] In addition, the present invention covers the lower end of the removal space (14) in which the damaged portion (11) of the bridge deck plate (10) has been removed with a concrete panel (30) that serves as both a formwork. Since the ends of the concrete panel (30) that serves as both a formwork are placed on the ends of the two girders (20) exposed in the removal space (14) of the bridge deck plate (10), the concrete (50) being poured is firmly supported when the concrete (50) is poured on the upper side of the concrete panel (30) and in the removal space (14).

[0042] In addition, in the present invention, when connecting members (2) are provided on the upper surface of the formwork-compatible concrete panel (30), the connecting members (2) and reinforcing bars (40) are connected and reinforced, and the reinforced reinforcing bars (40) are connected to the exposed reinforcing bars (13) of the existing bridge deck plate (10), so that the connection with the existing bridge deck plate (10) is firmly established. Explanation of the symbols

[0043] 10; Bridge deck 20; Girder 30; Concrete panel for formwork 40; Rebar 50; concrete

Claims

Claim 1 A method for repairing a bridge deck, comprising: a step of setting a removal area of ​​the bridge deck corresponding between the girders of the bridge to include a damaged portion of the bridge deck; a step of removing the removal area of ​​the bridge deck such that a portion of the reinforcing bar of the bridge deck is left exposed, and a step of removing the portion of each of the two girders in the width direction so as to expose the portion of the removal space; a step of placing a concrete panel that serves as both a formwork between the girders to cover the lower portion of the removal space of the bridge deck, wherein both ends of the concrete panel that serves as both a formwork are supported by the exposed portions of the two girders; a step of placing reinforcing bars in the removal space of the bridge deck; and a step of pouring concrete into the removal space covered by the concrete panel that serves as both a formwork, wherein the side forming the removal space of the bridge deck is an inclined surface, the inclined surface is sloped such that the thickness gradually decreases from the upper surface to the lower surface of the bridge deck, and the lower surface of the bridge deck is flat. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 A method for repairing a bridge deck, wherein the concrete panel serving as a formwork comprises a square concrete plate having a uniform thickness and an area corresponding to the planar area of ​​the removal space, and a plurality of connecting members that are vertically penetrating and connected to the reinforcing bar. Claim 8 A bridge deck repair construction method according to claim 7, characterized in that the connecting members are arranged in multiple rows along the longitudinal direction of the girder. Claim 9 A bridge deck repair construction method according to claim 1, characterized in that a sealing member is provided between the upper surface of the formwork-cum-concrete panel and the lower surface of the formwork-cum-concrete panel on the upper surface of the girder on which the formwork-cum-concrete panel is supported. Claim 10 A bridge deck repair construction method according to claim 1, characterized in that the formwork-cum-concrete panel is composed of a plurality of unit formwork-cum-concrete panels arranged in a row. Claim 11 delete

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