Bridge expansion joint replacement method with improved work efficiency and the expansion joint replaced by this method

Abstract

The present invention relates to a bridge expansion joint replacement method with improved work efficiency and an expansion joint replaced by this method. It enables partial replacement of the deck and rubber sheet components without the need to replace the entire expansion joint, thereby reducing costs and shortening work time. The present invention for realizing this is a method for replacing a bridge expansion joint device in which a bolt hole (11) in which a bolt (40) is fastened is formed in the device body (10) and a new bolt hole (12) to be used during subsequent replacement work is formed, comprising: a bolt dismantling step (ST 1) for dismantling a bolt (40) that was fastened to fix an existing deck plate (30); an existing deck plate separation step (ST 2) for separating the deck plate (30) fixed by the bolt (40) from the device body (10); and an existing rubber sheet removal step (ST 3) for removing an existing rubber sheet (20) exposed as the existing deck plate (30) is separated. The method is characterized by including: a new rubber sheet (20') that is inserted into a fitting groove (13) formed in the main body (10) of the device and connected and installed, and a new top plate (30') that has a bolt hole (32) formed at a position corresponding to a new hole hole (12) formed in the main body (10) of the device (10); a new bolt fastening step (ST 5) that fastens a new bolt (40') into the bolt hole (32) formed in the new top plate (30'); and a torque tensioning step (ST 6) that applies torque to the new bolt (40').

Description

Technology Field

[0001] The present invention relates to a method for replacing bridge expansion joints, and more specifically, to a method for replacing bridge expansion joints that enables easier replacement work in the event of damage or breakage of expansion joint components, and to an expansion joint replaced by the said method. Background Technology

[0003] Typically, multiple expansion joints are installed along the road length of the bridge between the decks to accommodate the expansion and contraction of the decks due to temperature changes, with the expansion joints positioned along the road width direction.

[0004] The aforementioned expansion joint is installed at the discontinuity of the bridge and accommodates the movement of the bridge superstructure caused by contraction and expansion of the bridge superstructure due to temperature changes, rotation and movement due to live loads during vehicle traffic, and creep and drying shrinkage depending on the type of superstructure. It compensates for these gaps to ensure driving safety of vehicles and also performs a waterproofing function to prevent rainwater from entering the substructure. As it is an important part of the bridge that plays a crucial role in the overall durability of the bridge, it is applied almost as an essential component.

[0005] Meanwhile, a drainage sheet is installed at the bottom of the expansion joint to prevent rainwater from the bridge superstructure from falling downwards along with various foreign substances when it flows in through the gap forming the expansion joint, thereby preventing corrosion or damage to the bridge's substructure.

[0006] The above drainage sheet is typically a sheet made of synthetic resin material including rubber, with both ends fixed to both ends of a bridge slab or expansion joint, and is installed to extend downward in a "U" or "V" shape so that a drainage channel can be formed in the center, and is formed with an inclined slope angle so that foreign substances including rainwater can move in one direction.

[0007] Meanwhile, as time passes, parts such as drainage sheets and top plates may become damaged and require replacement. However, in conventional technology, there was a problem where the entire expansion joint had to be replaced when these parts were replaced, resulting in excessive work time and cost. Prior art literature

[0009] Republic of Korea Patent Registration No. 1476245 (Registered Dec. 18, 2014) Republic of Korea Patent Registration No. 1335606 (Registered Nov. 26, 2013) The problem to be solved

[0010] The present invention is proposed to improve upon the problems of the aforementioned conventional technology, and aims to reduce replacement time and costs by providing a method that enables easy partial replacement of components constituting bridge supports, such as drainage sheets and deck plates. means of solving the problem

[0012] The replacement method of the present invention for achieving the above objective comprises: a method for replacing a bridge expansion joint device in which the device body, which is configured as a pair of two, has a structure in which the two device bodies are connected by mutual rubber sheets, and the upper part of each device body has a structure in which a top plate is fixed by bolt fastening, wherein the device body has a bolt hole formed therein and a new bolt hole to be used during subsequent replacement work, the method comprising: a bolt dismantling step for dismantling the bolt that was fastened to fix the existing top plate; an existing top plate separation step for separating the top plate fixed by the bolt from the device body; an existing rubber sheet removal step for removing the existing rubber sheet exposed as the existing top plate is separated; a new top plate mounting step for mounting a new top plate with a bolt hole formed at a position corresponding to the new hole formed in the device body after connecting and installing a new rubber sheet by fitting it into a groove formed in the device body; a new bolt fastening step for fastening a new bolt into the bolt hole formed in the new top plate; and a torque tensioning step for applying torque to the new bolt. Effects of the invention

[0014] The expansion joint replacement method of the present invention enables partial replacement of only the top plate and rubber sheet components without the need to replace the entire expansion joint, thereby reducing costs and shortening work time. Brief explanation of the drawing

[0016] FIG. 1 is a cross-sectional view of a finger-type expansion joint device to be repaired according to one embodiment of the present invention, and a planar structural view of a top plate and a device body. FIG. 2 is a cross-sectional view of the existing bolt dismantling state in the method of the present invention. FIG. 3 is a cross-sectional view of the existing top plate separation state in the method of the present invention. FIG. 4 is a cross-sectional view of the state in which the existing rubber sheet is removed in the method of the present invention. FIG. 5 is a cross-sectional view of the new top plate mounting state in the method of the present invention. FIG. 6 is a cross-sectional view of the new bolt fastening state and a planar structural view of the device body and top plate in the method of the present invention. FIG. 7 is a diagram of the new bolt torque tension state in the method of the present invention. FIGS. 8 to 14 are explanatory diagrams of a replacement method according to another embodiment of the present invention. FIG. 15 is a diagram showing the application state of the NMC type expansion joint device of the present invention. FIG. 16 is a diagram showing the application state of the RAIL type expansion joint device of the present invention. Specific details for implementing the invention

[0017] Hereinafter, specific embodiments of the present invention will be examined in detail with reference to the attached drawings.

[0018] Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments described in detail below. These embodiments are provided to more fully explain the present invention to those with average knowledge in the art.

[0019] Accordingly, the shapes of components depicted in the drawings may be exaggerated to emphasize clearer explanations. It should be noted that identical components in each drawing may be illustrated with the same reference numeral. Furthermore, detailed descriptions of functions and configurations of known technology that are deemed to unnecessarily obscure the essence of the invention may be omitted.

[0020] First, the method for replacing a bridge expansion joint with improved work efficiency according to one embodiment of the present invention is described in FIGS. 1 to 7 as follows.

[0021] FIG. 1 shows a cross-sectional view, a top plate plan view, and a device body plan view of a finger-type bridge expansion joint device in the present embodiment. As can be seen in FIG. 1, the device body (10), which is configured as a pair of two, is structured to be connected to each other by a rubber sheet (20). The top plate (30) is fixed to the upper part of each device body (10) by fastening a bolt (40). The device body (10) is configured such that a new bolt hole (12) to be used during subsequent replacement work is formed simultaneously with an existing bolt hole (11) where the bolt (40) is fastened, and the replacement work is carried out.

[0022] <Bolt Removal Step>(ST 1)

[0023] First, for the replacement work, the bolt (40) that was fastened to secure the existing top plate (30) is removed.

[0024] That is, at this time, as shown in FIG. 2, the existing bolt (40) that was fastened to the bolt hole (31) of the top plate (30) and the bolt hole (11) of the device body (10) is removed using an impactor tool.

[0025] <Existing Top Plate Separation Step>(ST 2)

[0026] Afterwards, the top plate (30), which was fixed by the bolt (40), is separated from the device body (10).

[0027] That is, at this time, as shown in Fig. 3, the upper plates (30) on both sides are removed so that the device body (10) and the rubber sheet (20) can be exposed.

[0028] <Existing Rubber Sheet Removal Step> (ST 3)

[0029] Afterwards, the existing rubber sheet (20) exposed as the existing top plate (30) is separated is removed.

[0030] At this time, as shown in Fig. 4, the rubber sheet (20) that was fitted into the fitting groove (13) of the main body (10) on both sides is separated and removed.

[0031] <New Top Plate Installation Step>(ST 4)

[0032] Afterwards, a new rubber sheet (20') is inserted into the fitting groove (13) formed in the main body (10) of the device as shown in FIG. 5 and connected and installed, and then a new top plate (30') having a bolt hole (32) formed at a position corresponding to the new hole hole (12) formed in the main body (10) of the device is mounted.

[0033] That is, the new top plate (30') mounted at this time has a bolt hole (32) formed at a different position from the existing top plate (30), and it is preferable that the bolt hole (32) be formed at a position corresponding to the new bolt hole (12) formed in the device body (10).

[0034] <New Bolt Fastening Step>(ST 5)

[0035] Afterwards, a new bolt (40') is fastened into the bolt hole (32) formed in the new top plate (30').

[0036] That is, at this time, a new bolt (40') is fastened using an impact tool as shown in FIG. 6, and it can be confirmed that the bolt hole (32) where the new bolt (40') is fastened is at a position corresponding to the new bolt hole (12).

[0037] <Torque Tension Stage>(ST 6)

[0038] Afterwards, the replacement work can be completed by applying torque to the new bolt (40') using a torque wrench as shown in Fig. 7.

[0039] When replacement is carried out through this process, it becomes possible to partially replace only the top plate and rubber sheet components without the need to replace the entire expansion joint, resulting in cost savings and reduced work time.

[0041] Meanwhile, FIGS. 8 to 14 illustrate a replacement method according to another embodiment of the present invention. In this embodiment, as confirmed through FIG. 8, the device body (10) is configured to be connected to each other by a rubber sheet (20), and the upper part of each device body (10) is configured to have a top plate (30) fixed by fastening a bolt (40). In the device body (10) and the top plate (30), new bolt holes (12, 32) to be used during subsequent replacement work are formed along with bolt holes (11, 31) where the bolt (40) is fastened, and the new bolt holes (12, 32) are finished with a rubber plug (50) to replace the bridge expansion joint device.

[0042] <Bolt Removal Step> (ST 11)

[0043] First, the bolt (40) that was fastened to secure the existing top plate (30) is removed.

[0044] That is, at this time, as shown in Fig. 9, the existing bolt (40) that was fastened to the bolt hole (31) of the top plate (30) and the bolt hole (11) of the device body (10) is removed using an impactor tool.

[0045] <Existing Top Plate Separation Step>(ST 12)

[0046] Afterwards, the top plate (30), which was fixed by the bolt (40), is separated from the device body (10).

[0047] That is, at this time, as shown in Fig. 10, the upper plates (30) on both sides are removed so that the device body (10) and the rubber sheet (20) can be exposed.

[0048] <Existing Rubber Sheet Removal Step> (ST 13)

[0049] Afterwards, the existing rubber sheet (20) exposed as the existing top plate (30) is separated is removed.

[0050] At this time, the rubber sheet (20) that was welded to the main body (10) on both sides as in Fig. 11 is separated and removed.

[0051] <Existing Top Plate Mounting Step>(ST 14)

[0052] Afterwards, a new rubber sheet (20') is connected and installed on the main body (10) of the device, and the existing top plate (30) is mounted again.

[0053] That is, at this time, as shown in FIG. 12, both ends of the new rubber sheet (20') are connected to the device body (10) by welding and sealing, and the top plate is the existing top plate (30) is reused.

[0054] <New Bolt Tightening Step>(ST 15)

[0055] Afterward, the rubber plug (50) installed in the new bolt holes (12, 32) formed in the device body (10) and top plate (30) is removed, and a new bolt (40') is fastened to the new bolt holes (12, 32) from which the rubber plug (50) was removed.

[0056] That is, at this time, a new bolt (40') is fastened using an impactor tool as shown in Fig. 13.

[0057] <Torque Tension Stage>(ST 16)

[0058] Afterwards, the separated rubber plug (50) is inserted into the existing bolt hole (11, 31) while applying torque to the new bolt (40') to complete the finishing process.

[0059] That is, at this time, as shown in Fig. 14, grease (52) is filled into the lower part of the rubber plug (50) in the existing bolt hole (11, 31), and the upper part of the rubber plug (50) is filled with blown asphalt (51), which has increased elasticity compared to ordinary asphalt.

[0060] Meanwhile, the brown asphalt (51) filled on the upper part of the rubber stopper (50) may be mixed with a functional additive to improve finishing efficiency.

[0061] The configuration of the expansion joint implemented by the bridge expansion joint replacement method with improved work efficiency described above is as follows.

[0062] The device body (10) of the expansion joint device of the present invention has corresponding fitting grooves (13) formed therein and two are installed in pairs at the slab joint of a bridge.

[0063] The upper wings of the rubber sheets (20) are respectively fitted into fitting holes (13) formed in corresponding parts of the above pair of device bodies (10) and installed.

[0064] A pair of top plates (30) installed on the upper surface of the device body (10) formed above have a plurality of fingers having a predetermined length formed on one side and a conventional bolt hole (11) formed on one side of the upper surface and are installed on the upper surface of the device body (10).

[0065] At this time, the fingers formed on one side of the top plate (30) and installed in a cross pattern are installed at a predetermined interval so that they can expand and contract according to the temperature.

[0066] At this time, the existing top plate (30) or existing rubber sheet (20) installed at the bridge joint is replaced as needed.

[0067] In other words, when replacing bridge expansion joints, high-strength bolts and nuts tightened to the specified axial force are prohibited from being reused as plastic deformation may have occurred; in practice, it frequently happens that when high-strength bolts on old expansion joints are loosened and reassembled, they cannot be assembled with the original torque.

[0068] Therefore, when it is necessary to replace only the top plate or rubber sheet with the fingers formed on the expansion joint, the bolts can be replaced with new ones when disassembling and reassembling the top plate, but since the nuts embedded in the concrete cannot be replaced, there is a problem in that the entire expansion joint must be replaced.

[0069] Accordingly, the present invention allows for the replacement of only the top plate or rubber sheet by installing an additional nut when replacing or reinstalling the top plate, thereby simplifying the replacement work and preventing economic loss.

[0070] Accordingly, the present invention alternately forms new bolt holes (32) on one side of existing bolt holes (31) formed in the pair of device bodies (10).

[0071] A finishing nut (53) is formed at a bridge slab location corresponding to a new bolt hole (32) formed in the main body (10) of the device.

[0072] The new finishing nut (53) installed on the bridge slab is a preliminary finishing nut that will be used later when installing the top plate (30) or the new rubber sheet (20'). Therefore, grease (52) is filled inside the finishing nut (53) to prevent contact with water and moisture, thereby preventing rust.

[0073] In addition, a new top plate that is replaced is installed on the upper surface of the device body (10), and the new top plate (30') is installed so that the fingers formed on one side correspond to each other.

[0074] On the upper surface of the new top plate (30'), a new bolt hole (32) is formed on one side of the existing bolt hole (31), and the new bolt hole (32) is formed so as to be aligned vertically with the new bolt hole (12) formed in the lower device body (10) and the finishing nut (53) formed in the bridge slab.

[0075] A rubber plug (50) is installed by being inserted into a new bolt hole (32) formed in the new top plate (31') and a finishing nut (53) installed in the new bolt hole (12) of the device body (10) and the bridge slab.

[0076] The above rubber stopper (50) is intended to prevent foreign matter from entering the new bolt hole (12) formed in the device body (10) and the new bolt hole (32) of the new top plate (31'), and to protect the new bolt hole (12)(32) so that there are no problems during future use.

[0077] In addition, the present invention prevents a hole from forming in the expansion joint by ensuring that brown asphalt (51) is filled into the new bolt hole (32) formed in the new top plate (31') and the new bolt hole (3) of the new top plate (31') at the upper part of the rubber plug (50) that is fitted into the new bolt hole (12) of the device body (10) and the finishing nut (53) installed on the bridge slab.

[0078] In addition, grease (52) is filled into the finishing nut (53) installed on the bridge slab, and the rubber plug (50) is fitted into the new bolt hole (32) formed in the new top plate (31') and into the new bolt hole (12) of the device body (10), thereby protecting the finishing nut (53) and the new bolt hole.

[0079] The present invention allows for the assembly of bolts and nuts with high strength without plastic deformation by forming existing bolt holes (31) and new bolt holes (32) alternately at predetermined positions on the upper surface of the new top plate (30'), so that when constructing a bridge, the device body (10) and the finishing nut (53) installed on the bridge slab are connected through the existing bolt holes (31), and subsequently, after replacing the existing rubber sheet (20), the device body (10) and the finishing nut (53) filled with grease (52) installed on the bridge slab are connected by bolts through the new bolt holes (32) formed on the upper surface of the new top plate (30') to be assembled with a predetermined torque.

[0080] When the rubber sheet is replaced through this process, the existing top plate (30) can be reused as is, and only the rubber sheet (20, 20') is replaced, thereby reducing construction costs.

[0081] Furthermore, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the method for replacing expansion joints according to the present invention can be implemented with various modifications by those skilled in the art.

[0082] For example, in the above embodiment, the structure of a finger-type expansion joint device has been described and illustrated, but if necessary, it can also be applied to a replacement method for an NMC-type expansion joint device as shown in FIG. 15 or a rail-type expansion joint device as shown in FIG. 16.

[0083] Therefore, such modified embodiments should not be understood separately from the technical spirit or scope of the present invention, and such modified embodiments should be considered to be included within the appended claims of the present invention. Explanation of the symbols

[0085] 10: Device body 11: Existing bolt hole 12: New bolt hole 13: Insertion groove 20 : Rubber sheet (existing) 20': Rubber sheet (new) 30 : Top plate (existing) 30': Top plate (new) 31 : Bolt hole (existing) 32 : Bolt hole (new) 40 : Bolt (Existing) 40': Bolt (New) 50 : Rubber stopper 51 : Brown asphalt 52 : Grease 53 : Finish nut

Claims

Claim 1 In a method for replacing a bridge expansion joint device, the device body (10), which is configured as a pair of two, has a structure in which they are connected by mutual rubber sheets (20), and the upper part of each device body (10) has a top plate (30) fixed by fastening a bolt (40), wherein the device body (10) has a bolt hole (11) where the bolt (40) is fastened and a new bolt hole (12) to be used during subsequent replacement work is formed, and the bolt (40) is fastened in the device body (10), the bolt (40) is removed in a bolt removal step (ST 1); the top plate (30) fixed by the bolt (40) is separated from the device body (10) in an existing top plate separation step (ST 2); and the existing rubber sheet (20) exposed as the existing top plate (30) is separated in an existing rubber sheet removal step (ST 3), wherein a new rubber sheet (20') is placed in a fitting groove (13) formed in the device body (10). A bridge expansion joint replacement method with improved work efficiency, comprising: a new top plate mounting step (ST 4) in which a new top plate (30') is mounted after being connected and installed, and a bolt hole (32) is formed at a position corresponding to a new hole hole (12) formed in the device body (10); a new bolt fastening step (ST 5) in which a new bolt (40') is fastened to the bolt hole (32) formed in the new top plate (30'); and a torque tensioning step (ST 6) in which torque is applied to the new bolt (40'); wherein the new top plate (30') mounted in the new top plate mounting step (ST 4) has a bolt hole (32) formed at a different position from the existing top plate (30), and the bolt hole (32) is formed at a position corresponding to a new bolt hole (12) formed in the device body (10). Claim 2 delete Claim 3 The device body (10), which is configured as a pair of two, has a structure in which they are connected by mutual rubber sheets (20), and a top plate (30) is fixed to the upper part of each device body (10) by fastening a bolt (40). The device body (10) and the top plate (30) have bolt holes (11, 31) where the bolt (40) is fastened, and new bolt holes (12, 32) to be used for subsequent replacement work are formed, and the new bolt holes (12, 32) are finished with rubber plugs (50). The method comprises a bolt removal step (ST 11) for removing the bolt (40) that was fastened to fix the top plate (30); an existing top plate separation step (ST 12) for separating the top plate (30) fixed by the bolt (40) from the device body (10); and an existing rubber sheet removal step (ST 13) for removing the existing rubber sheet (20) exposed as the existing top plate (30) is separated. A method for replacing a bridge expansion joint device comprises: an existing deck mounting step (ST 14) in which a new rubber sheet (20') is connected and installed on the device body (10) and the existing deck (30) is mounted again; a new bolt fastening step (ST 15) in which a rubber plug (50) installed in the new bolt holes (12, 32) formed in the device body (10) and the deck (30) is removed, and a new bolt (40') is fastened to the new bolt holes (12, 32) from which the rubber plug (50) has been removed; and a torque tensioning step (ST 16) in which torque is applied to the new bolt (40').A bridge expansion joint replacement method with improved work efficiency, comprising: a rubber plug (50) separated in the torque tensioning step (ST 15) and fitted into the existing bolt hole (11, 31) in the torque tensioning step (ST 16) for finishing treatment, wherein in the torque tensioning step (ST 16), grease (52) is filled into the lower part of the rubber plug (50) and brown asphalt (51) is filled into the upper part of the rubber plug (50), and a functional additive for improving finishing efficiency is mixed into the filled brown asphalt (51); Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 A bridge expansion joint device comprising: a device body (10) having corresponding fitting grooves (13) formed therein and installed in pairs of two at a bridge slab joint; a rubber sheet (20) installed in a fitting hole (13) formed in each of the pair of device bodies (10); and a pair of top plates (30) installed on the upper surface of the pair of device bodies (10), having a finger formed on one side and an existing bolt hole (11) formed on one side of the upper surface, wherein the device body comprises: a plurality of new bolt holes (32) formed on one side of the existing bolt hole (31) formed in the pair of device bodies (10); a finishing nut (53) formed at a bridge slab position corresponding to the new bolt hole (32) formed in the device body (10); and a new top plate (30') located on the upper surface of the device body (10) and installed so that the finger formed on one side intersects with each other. An expansion joint device characterized by: a new bolt hole (32) formed on one side of an existing bolt hole (31) on the upper surface of the new top plate (30') and formed to be aligned vertically with a new bolt hole (12) formed in the lower device body (10) and a finishing nut (53) formed in the bridge slab; a rubber plug (50) fitted into the new bolt hole (32) formed in the new top plate (30') and fitted into the new bolt hole (12) of the device body (10) and the finishing nut (53) installed in the bridge slab, and brown asphalt (51) filled into the new bolt hole (32) of the new top plate (30') at the upper part of the rubber plug (50). Claim 8 delete Claim 9 An expansion joint device according to claim 7, characterized in that grease (52) is filled into a finishing nut (53) installed on the bridge slab, and a rubber plug (50) is fitted into a new bolt hole (12) of the device body (10) by being fitted into a new bolt hole (32) formed in the new top plate (31'). Claim 10 In claim 7, the expansion joint device is characterized by having existing bolt holes (31) and new bolt holes (32) alternately formed at predetermined positions on the upper surface of the new top plate (30'), so that when the bridge is expanded, the device body (10) is connected to the finishing nut (53) installed on the bridge slab through the existing bolt holes (31), and subsequently, after replacing the existing rubber sheet (20), the device body (10) is connected to the finishing nut (53) filled with grease (52) installed on the bridge slab through the new bolt holes (32) formed on the upper surface of the new top plate (30') and can be assembled with a predetermined torque.

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