KR102253068B1 - Repair method of expansion joint device using inner space of L-shaped support steel - Google Patents

Abstract

The present invention relates to an expansion joint device repairing method using an inner space of L-shaped support steel, capable of easily replacing consumable components by actively using an inner space of L-shaped support steel when a workspace is small. In accordance with the present invention, in regard to an expansion joint device including L-shaped support steel comprising a vertical part joined to a lower side of each rail to be extended downward, and a horizontal part extended in a form bent from the bottom of the vertical part, with respect to a first rail placed in the middle and second rails placed on both sides thereof, respectively, both ends of a horizontal supporter are individually fixed between the second rails on both sides and support steel horizontal parts of the second rails via between the first rail and a support steel horizontal part of the first rail, a hydraulic jack is installed while supported by the horizontal supporter between the first rail and the support steel horizontal part of the first rail, and then, the hydraulic jack is extended to open a space between the first rail and the support steel horizontal part of the first rail to replace a bearing between the first rail and a support beam, and a spring between the support steel horizontal part of the first rail and the support beam.

Description

Repair method of expansion joint device using inner space of L-shaped support steel}

The present invention relates to an extension joint repair method, and in particular, in a situation where the working space is narrow, the inner space of the L-shaped support steel is actively utilized and consumable parts can be easily replaced. It relates to the joint repair method.

In general, deformation stress due to various causes such as temperature change, its creep and shrinkage, construction error, loading load, earthquake and ground subsidence acts on a bridge, so if the stress is not resolved, it is confined. If so, there is a risk of cracking and damaging the structure.Therefore, a joint gap, which is a gap that is spaced apart for each period, is installed, and an expansion joint is installed in the joint gap to accommodate the dynamic behavior due to the deformation of the structure. have.

For example, a bridge consists of a number of piers and a number of decks that are seated on the top of the piers to form a road, and in the part where the tops and tops are connected, adequate clearance to accommodate the dynamic behavior of both decks smoothly. It has a joint gap part in width. The expansion joints connect such joints in a horizontal direction so that the vehicle can run smoothly from the top thereof, and block rainwater or various foreign substances from entering through the joints.

Depending on the shape of the expansion joint, there are typically rail type, finger type, and mono cell type, among which the rail type has a relatively wide gap between the joints, so the allowable expansion and contraction amount. When it needs to be large, it is widely used, for example, for large-scale long bridges.

In the case of such an expansion joint, it has the advantage of extending the lifespan with low cost by replacing the consumable parts bearings and springs, and the Seohae Bridge, which is more than 20 years old after installation, as well as the Gwangan Bridge and Yi Sun-Sin Bridge are extensively renovated. Ahead.

Looking at the method of replacing the bearing and the spring in the expansion joint, the rail 20 is supported by the support beam 10 as shown in Figs. ) And the support steel (30) by making a clearance between the rail (20) and the support beam (10) to replace the bearing (40), on the contrary, the hydraulic jack (70) and the spring (50) replacement jig (80) ) To lower the rail (20) and the support steel (30) by making a clearance between the support steel (30) and the support beam (10) to replace the spring (50).

Such a conventional method was very useful when there was sufficient effective working space for installing the pedestal 60, the hydraulic jack 70, and the spring replacement jig 80 under the support beam 10, but the support beam 10 lower side When the effective working space that can be secured is narrow, it is difficult to install the pedestal 60, the hydraulic jack 70, and the spring replacement jig 80, and thus there is a fatal problem that becomes useless.

Korean Registered Patent Publication No. 10-1762145 (2017.07.21.)

Accordingly, the present invention has been proposed to solve the problems of the related art as described above, and an object of the present invention is to easily replace consumable parts by actively utilizing the inner space of the L-shaped support steel in a situation where the working space is narrow. It is to provide a repair method for expansion joints using the inner space of the L-shaped support steel.

In order to achieve the above object, the method of repairing an expansion joint according to the technical idea of the present invention includes a plurality of rails, a vertical part that is joined to the lower surface of each rail and extends downward, and a form bent from the lower end of the vertical part. In an expansion joint having an L-shaped support steel consisting of an extended horizontal part, a repair method for an expansion joint to replace the bearing installed between the rail and the support beam, and the spring installed between the support beam and the horizontal part of the L-shaped support steel As for the first rail disposed in the middle and the second rail disposed on both sides of the first rail, the second rail and the second rail on both sides are passed between the horizontal portions of the support steel of the first rail and the first rail. By fixing both ends of the horizontal support between the horizontal portions of the supporting steel of the rail, installing a hydraulic jack in the state supported by the horizontal support between the first rail and the horizontal portion of the supporting steel of the first rail, and then extending the hydraulic jack. It is technical to replace the bearing between the first rail and the support beam, and the spring between the support steel horizontal part and the support beam of the first rail while spreading between the first rail and the horizontal part of the support steel of the first rail. It is characterized by configuration.

Here, the steps of loading the second lower support on the upper surface of the horizontal portion of the support steel of the second rail disposed on both sides, respectively; Loading a first lower support on the upper surface of the horizontal support steel portion of the first rail disposed in the middle, and loading a hydraulic jack on the first lower support; Loading the horizontal support in the form of spanning the second lower support at both ends via the upper side of the hydraulic jack; Installing a second upper support between the horizontal support and the second rail to support both ends of the horizontal support, and installing a first upper support between the horizontal support and the first rail; In the state where the first upper support is installed, the hydraulic jack is extended to widen the distance between the horizontal portion of the support steel of the first rail and the first rail, thereby resulting in a state in which the compression between the first rail and the support beam is loosened. Removing the existing bearing; Reducing the hydraulic jack to its original state and removing the first upper support installed between the horizontal support and the first rail; In the state in which the first upper support is removed, the hydraulic jack is extended to lower the horizontal portion of the support steel of the first rail, while removing the spring in which the compression is loosened between the horizontal portion of the first rail support steel and the support beam. Inserting a new spring in its place; Reducing the hydraulic jack to its original state and then re-installing the first upper support between the horizontal support and the first rail; Including a step of installing a new bearing between the first rail and the support beam by extending the hydraulic jack while the first upper support is installed to increase the distance between the horizontal portion of the support steel of the first rail and the first rail, and between the first rail and the support beam. It can be characterized.

In addition, when the first upper support is installed between the horizontal support and the first rail, an auxiliary hydraulic jack is additionally installed, and when the first upper support is removed, the auxiliary hydraulic jack is also removed.

In addition, the first lower support and the first upper support are installed to face adjacent to the vertical portion of the support steel of the first rail, and the second lower support and the second upper support are disposed on the vertical portion of the support steel of the second rail. It may be characterized in that it is installed to face adjacent.

In addition, the front lower end of the first lower support facing the vertical part of the support steel of the first rail is formed in a round curved surface to avoid interference with the intersection between the vertical part of the support steel and the horizontal part of the first rail. And, the front lower end of the second lower support facing the vertical part of the support steel of the second rail is formed in a rounded curved surface to avoid interference with the intersection between the vertical part of the support steel and the horizontal part of the second rail. It can be characterized by one.

In addition, the first lower support and the second lower support each have a clamping arm that is formed in a pair on both sides, and the rear end is hinged to each other, and the front end is clamped in the form of surrounding a vertical part of the adjacent support steel, and the pair of clamping arms It may be characterized in that a plurality of fastening holes formed along the longitudinal direction are provided at the distal end of each so that the bolt and the nut can be fastened in correspondence with the front and rear widths of the adjacent vertical portions of the supporting steel.

In addition, the front upper end of the first upper support facing the vertical part of the support steel of the first rail is formed in a rounded curved surface to avoid interference with the intersection between the first rail and the vertical part of the support steel of the first rail. The upper front end of the second upper support facing the vertical part of the support steel of the second rail is formed in a rounded curved surface to interfere with the intersection between the second rail and the vertical part of the support steel of the second rail. It can be characterized by being able to avoid.

In addition, the first upper support and the second upper support each have a clamping arm that forms a pair on both sides of the rear end and wraps a vertical part of an adjacent support steel in a state in which the rear end is hinged, and the front end is clamped, the pair of clamping arms. It may be characterized in that a plurality of fastening holes formed along the longitudinal direction are provided at the distal end of each so that the bolt and the nut can be fastened in correspondence with the front and rear widths of the adjacent vertical portions of the supporting steel.

On the other hand, the rail and the support in an expansion joint having a plurality of rails, an L-shaped support steel consisting of a vertical portion that is joined to the lower surface of each rail and extends downward and a horizontal portion that extends in a form bent from the lower end of the vertical portion. As a repair member for a repair method of an expansion joint for replacing a bearing installed between the beams and a spring installed between the support beam and the horizontal part of the L-shaped support steel, it is a column-shaped to be stacked upright on the upper surface of the horizontal part of the support steel. It consists of a body, and further includes a pair of clamping arms hinged on both sides of the body in the shape of a column, which are hinged so that the rear end is rotatable while forming a pair. It is a feature of the technical construction that the tip is fastened by a nut.

Here, in the repair member, the front lower end or upper end facing the vertical part of the support steel is formed in a rounded curved surface to avoid interference with the intersection between the vertical part of the support steel and the horizontal part or the intersection between the vertical part of the support steel and the rail. It can be characterized by being so.

In the expansion joint repair method according to the present invention, the bearing and spring supporting the rail can be gradually replaced without disassembling the rail of the expansion joint device, so that the passage of the vehicle does not need to be blocked. Since the inner space is used, the replacement work of bearings and springs can be performed smoothly even if the working space is narrow.

1 and 2 are reference diagrams for explaining the prior art
Figure 3 is a flow for explaining the expansion joint repair method according to an embodiment of the present invention
4A to 4L are a series of reference diagrams for explaining a method of repairing an expansion joint according to an embodiment of the present invention.
Figure 5 is a side view for explaining the repair members installed in the support steel of the first rail located in the middle in the repair method of the expansion joint according to an embodiment of the present invention
Figure 6 is a side view for explaining the repair members installed in the support steel of the second rail located on both sides in the repair method of the expansion joint according to an embodiment of the present invention
7 is a side view of a first upper support as one of the repair members in the repair method of the expansion joint according to an embodiment of the present invention

With reference to the accompanying drawings will be described in detail with respect to the repair method of the expansion joint according to embodiments of the present invention. Since the present invention can be modified in various ways and has various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form of disclosure, and it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements. In the accompanying drawings, dimensions of structures are shown to be enlarged than actual for clarity of the present invention, or reduced than actual to understand a schematic configuration.

In addition, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present application. .

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Figure 3 is a flow chart for explaining the repair method of the expansion joint according to an embodiment of the present invention, Figures 4a to 4l are a series of reference diagrams for explaining the repair method of the expansion joint according to the embodiment of the present invention, Figure 5 is a side view for explaining the repair members installed in the support steel of the first rail located in the middle in the repair method of the expansion joint according to the embodiment of the present invention, Figure 6 is the repair of the expansion joint according to an embodiment of the present invention It is a side view for explaining the repair members installed in the supporting steel of the second rail located on both sides in the construction method, and FIG. 7 is a side view of the first upper support, which is one of the repair members in the expansion joint repair method according to an embodiment of the present invention. .

The expansion joint repair method according to an embodiment of the present invention includes three rails located side by side as shown in FIGS. 4A to 4L even in a situation where the space for working under the support beam 110 is limited. The rail 120a and the second rail 120b disposed on both sides thereof, and the vertical portion 130a that is joined to the lower surface of each rail and extends downward, and the vertical portion 130a that extends in a curved form from the lower end of the vertical portion 130a. It is intended to actively utilize the inner space existing between the L-shaped support steel 130 made of the horizontal portion 130b.

To this end, the expansion joint repair method according to an embodiment of the present invention targets the first rail 120a disposed in the middle and the second rail 120b disposed on both sides thereof, and the first rail 120a And the horizontal part 130b of the support steel 130 of the second rail 120b and the second rail 120b on both sides in a state passing through the horizontal part 130b of the supporting steel of the first rail 120a. Each of the both ends of the support 260 is fixed, and in that state, the first rail 120a and the support steel 130 of the first rail 120a are supported by the horizontal support 160 between the horizontal part 130b. After installing the hydraulic jack 210, the hydraulic jack 210 is stretched to spread the first rail 120a and the support steel 130 of the first rail 120a, and the horizontal part 130b of the first rail 120a. And the bearing 140 between the support beam 110 and the support steel 130 of the first rail 120a, the spring 150 between the horizontal portion 130b and the support beam 110 is replaced. And, as shown in Figure 3, the second lower support installation step (S110), the first lower support and hydraulic jack installation step (S120), the horizontal support installation step (S130), the first upper support and the second upper support installation step (S140) , Hydraulic jack extension and bearing removal step (S150), hydraulic jack reduction and first upper support removal step (S160), hydraulic jack extension and spring replacement step (S170), first upper support installation step (S180) and hydraulic jack extension and bearing insertion step It consists of including (S190).

Hereinafter, a method of repairing an expansion joint according to an embodiment of the present invention will be described in detail with the focus on each of the steps.

First, the second lower support installation step (S110) is performed. In this step, in the initial state as shown in FIG. 4A, on the upper surface of the horizontal portion 130b of the supporting steel 130 of the second rail 120b disposed on both sides of the first rail 120a located in the middle as shown in FIG. 4B. Each second lower support 240 is mounted and installed.

Thereafter, the first lower support and hydraulic jack installation step (S120) is performed. In this step, as shown in Fig. 4c, the first lower support 220 is loaded on the upper surface of the support steel 130 and the horizontal part 130b of the first rail 120a, and the hydraulic jack 210 is loaded on the first lower support 220. do. The hydraulic jack 210 is provided and installed to have a small body so that it can exert a force of about 5 tons and can be used in the inner space of the support steel 130. Here, the first lower support 220 is lower in height than the second lower support 240, but must be higher than the spring 150 installed under the support beam 110.

Here, the first lower support 220 and the second lower support 240 is a column-shaped body to be loaded in a state erected on the upper surface of the support steel 130 horizontal portion 130b, as shown in Figs. 5 and 6, respectively. It is provided with a steel material made of and is installed to face adjacent to the vertical portion 130a of the support steel 130 of the first rail 120a and the vertical portion 130a of the support steel 130 of the second rail 120b. It should be noted that the front lower end of the first lower support 220 facing the vertical portion 130a of the support steel 130 of the first rail 120a is formed in a round curved surface, so that the support steel 130 of the first rail 120a ) To avoid interference with the intersection between the vertical portion 130a and the horizontal portion 130b, and the second lower support 240 facing the vertical portion 130a of the supporting steel 130 of the second rail 120b ) Is formed in a rounded curved surface to avoid interference with the intersection between the vertical portion (130a) and the horizontal portion (130b) of the support steel 130 of the second rail (120b). In the case of the first upper support 230 and the second upper support 250, which are installed through the following steps, they are also provided with a steel material made of a column-shaped body so that they can be stacked in an erect state, but each rail is formed with a rounded surface at the front top. It is possible to avoid interference with the crossing portion between the and the support steel 130, the vertical portion (130a). As described above, the curved surface 230a formed on the upper end of the first upper support 230 can be confirmed in FIG. 7 in relation to the curved surface formed on the front lower end of each lower support and the front upper end of the upper support. Is formed in a shape. However, considering the role of avoiding interference as described above, the curved surface may be sufficient, but in some cases, it may be formed in a different shape, and the present invention is not limited thereto.

Further, the first lower support 220, the first upper support 230, the second lower support 240 and the second upper support 250 are commonly formed in pairs on both sides of the body as shown in FIG. It has a clamping arm 271 coupled with a hinge 271b so as to be rotatable. A plurality of fastening holes 271a formed in rows are provided at the tip portions of the pair of clamping arms 271. Thus, each support is a bolt and nut (not shown) passing through the fastening hole 271a in a state where the vertical portions 130a of the support steel 130 adjacent to it are wrapped using a pair of clamping arms 271 from both sides (not shown). It is concluded by As a result, each of the bearings can stably support the applied load without falling in a state in close contact with the vertical portion 130a of the supporting steel 130 located nearby. Such a clamping arm 271 allows the first lower support 220 and the second lower support 240 to stably maintain an erected state even though the lower ends of the first lower support 220 and the second lower support 240 are formed as curved surfaces for avoiding interference.

Thereafter, the horizontal support installation step (S130) is performed. In this step, as shown in Fig. 4d, both ends of the horizontal support 260 on the second lower support 240 loaded on the support steel 130 and the horizontal part 130b of the second rail 120b disposed on both sides. Install it by loading it in a hanging shape. At this time, the horizontal support 260 passes through the upper side of the hydraulic jack 210 in the middle.

Then, the first upper support and the second upper support installation step (S140) proceeds. In this step, as shown in FIG. 4E, by installing the second upper support 250 in the form of filling between the horizontal support 260 and the second rail 120b on both sides, both ends of the horizontal support 260 are provided with the second rail 120b. It is to be firmly supported between the support steel 130 and the second rail (120b) of. In addition, by installing the first upper support 230 in the form of filling between the horizontal support 260 and the first rail 120a, the support steel 130 of the first rail 120a according to the expansion and contraction operation of the hydraulic jack 210 ) And the distance between the first rail 120a can be adjusted.

Here, when the first upper support 230 is installed between the horizontal support 260 and the first rail 120a, an auxiliary hydraulic jack (not shown) may be additionally installed in a vertical row, and the first upper support 230 When removing ), the auxiliary hydraulic jack can also be removed. In addition, it is also possible to install an auxiliary hydraulic jack in place of the first upper tread (230).

Thereafter, the hydraulic jack extension and bearing removal step (S150) are performed. In this step, the hydraulic jack 210 is elongated as shown in FIG. 4F while both ends of the horizontal support 260 are firmly supported through the previous step. Then, the space between the horizontal portion 130b of the first rail 120a and the horizontal portion 130b of the first rail 120a is finely opened, and the bearing 140 is formed between the first rail 120a and the support beam 110. ) The squeezed state becomes loose. In this state, the existing bearing 140 is removed as shown in FIG. 4G. However, after removing the existing bearing 140, the new bearing 140 is not immediately inserted, which is to facilitate the removal of the spring 150 in the future. At this time, only 1 cm is sufficient for an additional distance between the horizontal portion 130b and the first rail 120a of the support steel 130 of the first rail 120a due to the elongation of the hydraulic jack 210. Not as noticeable as shown in 4f and 4g.

Thereafter, the hydraulic jack reduction and the first upper support removal step (S160) are performed. In this step, after reducing the hydraulic jack 210 to its original state as shown in FIG. 4H, the first upper support 230 installed between the horizontal support 260 and the first rail 120a is removed.

Thereafter, the hydraulic jack extension and spring replacement step (S170) is performed. In this step, the hydraulic jack 210 is elongated as shown in FIG. 4I while the first upper support 230 is removed through the previous step. Then, the hydraulic jack 210 and the horizontal part 130b of the support steel 130 of the first rail 120a and the horizontal part 130b of the hydraulic jack 210 and the first rail 120a are pushed downward and descend by the horizontal support 260 firmly supported at both ends. The compression of the spring 150 between the support steel 130 of 120a, the horizontal portion 130b and the support beam 110 is loosened. At this time, since the bearing 140 between the first rail 120a and the support beam 110 is removed through step S150, the support steel 130 of the first rail 120a is easily lowered. In this state, as shown in FIGS. 4I and 4J, the existing spring 150 is removed, and then a new spring 150 is inserted.

Thereafter, the hydraulic jack is reduced and the first upper support installation step (S180) is performed. In this step, as shown in FIG. 4K, the hydraulic jack 210 that was extended in the previous step is reduced, and the first upper support 230 is reinstalled between the horizontal support 260 and the first rail 120a.

Thereafter, the hydraulic jack extension and bearing insertion step (S190) are performed. In this step, the hydraulic jack 210 is stretched while the first upper support 230 is installed again as shown in FIG. 4L so that the support steel 130 of the first rail 120a, the horizontal part 130b and the first rail 120a A new bearing 140 is inserted and installed between the first rail 120a and the support beam 110 while spreading the gap therebetween.

Thereafter, the repair members that were installed after reducing the elongated hydraulic jack 210 were replaced with the second upper support 250, the horizontal support 260, the hydraulic jack 210, the first lower support 220, and the second lower support 240. If removed in the order of ), the replacement of the bearing 140 and the spring 150 for the first rail 120a is completed.

In this way, the bearing 140 and the spring 150 that were supporting one rail can be simply replaced by performing the above-described steps, and the bearing 140 of the entire rail is repeated by repeating the same process while sequentially moving the rail to be worked. And it becomes possible to replace the spring 150.

As described, the maintenance method for an expansion joint according to an embodiment of the present invention is a maintenance work because the bearing 140 and the spring 150 supporting the rail can be gradually replaced without dismantling the rail at all in the expansion joint device. During this process, it is not necessary to block the passage of the vehicle, and since the inner space of the L-shaped support steel 130 is utilized, smooth maintenance work is possible even if the work space is narrow.

Although the preferred embodiment of the present invention has been described above, the present invention can use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Therefore, the above description does not limit the scope of the present invention determined by the limits of the following claims.

110: support beam 120a: first rail
120b; 2nd rail 130: support steel
140: bearing 150: spring
210: hydraulic jack 220: first lower support
230: first upper support 240: second lower support
250: second upper support 260: connecting beam

Claims (10)

Between the rail and the support beam in an expansion joint comprising a plurality of rails, and an L-shaped support steel consisting of a vertical portion that is joined to the lower surface of each rail and extends downward and a horizontal portion that extends in a form bent from the lower end of the vertical portion. As a repair method for an expansion joint for replacing the bearing installed in the and a spring installed between the support beam and the horizontal part of the L-shaped support steel,
For the first rail disposed in the middle and the second rail disposed on both sides of the rail, the second rail and the second rail on both sides pass through the horizontal portion of the support steel of the first rail and the first rail. Fix both ends of the horizontal support between the horizontal parts of the support steel,
After installing a hydraulic jack in a state supported by the horizontal support between the first rail and the horizontal part of the support steel of the first rail, the hydraulic jack is extended to spread between the first rail and the horizontal part of the support steel of the first rail. An expansion joint repair method, characterized in that the bearing between the first rail and the support beam, and a spring between the support steel horizontal portion of the first rail and the support beam are replaced. The method of claim 1,
Loading a second lower support on the upper surface of the horizontal support steel portion of the second rail disposed on both sides;
Loading a first lower support on the upper surface of the horizontal support steel portion of the first rail disposed in the middle, and loading a hydraulic jack on the first lower support;
Loading the horizontal support in the form of spanning the second lower support at both ends via the upper side of the hydraulic jack;
Installing a second upper support between the horizontal support and the second rail to support both ends of the horizontal support, and installing a first upper support between the horizontal support and the first rail;
In the state where the first upper support is installed, the hydraulic jack is extended to widen the distance between the horizontal portion of the support steel of the first rail and the first rail, thereby resulting in a state in which the compression between the first rail and the support beam is loosened. Removing the existing bearing;
Reducing the hydraulic jack to its original state and removing the first upper support installed between the horizontal support and the first rail;
In the state in which the first upper support is removed, the hydraulic jack is extended to lower the horizontal part of the support steel of the first rail, while removing the spring in which the compression is loosened between the horizontal part of the first rail support steel and the support beam. Inserting a new spring in its place;
Reducing the hydraulic jack to its original state and then re-installing the first upper support between the horizontal support and the first rail;
Installing a new bearing between the first rail and the support beam by extending the hydraulic jack while the first upper support is installed to widen the distance between the horizontal portion of the support steel of the first rail and the first rail;
Expansion joint repair method comprising a. The method of claim 2,
When installing the first upper support between the horizontal support and the first rail, an auxiliary hydraulic jack is additionally installed, and when removing the first upper support, an auxiliary hydraulic jack is also removed. The method of claim 2,
The first lower support and the first upper support are installed to face adjacent to the vertical part of the support steel of the first rail, and the second lower support and the second upper support are adjacent to the vertical part of the support steel of the second rail. An expansion joint repair method, characterized in that it is installed to face to face. The method of claim 4,
The front lower end of the first lower support facing the vertical part of the support steel of the first rail is formed in a rounded curved surface to avoid interference with a crossing part between the vertical part of the support steel and the horizontal part of the first rail, The front lower end of the second lower support facing the vertical part of the support steel of the second rail is formed in a round curved surface to avoid interference with the intersection between the vertical part of the support steel and the horizontal part of the second rail. Expansion joint repair method characterized by the feature. The method of claim 5,
The first lower support and the second lower support each have a clamping arm that is formed in a pair on both side surfaces, and the rear end is hinged to each other and wraps an adjacent vertical part of the supporting steel, and the front end thereof is clamped,
A repair method for an expansion joint, characterized in that a plurality of fastening holes are provided at the distal ends of the pair of clamping arms, respectively, so that a bolt and a nut can be fastened in correspondence with the front and rear widths of adjacent vertical portions of the supporting steel. The method of claim 4,
The front upper end of the first upper support facing the vertical part of the support steel of the first rail is formed in a round curved surface to avoid interference with the intersection between the first rail and the vertical part of the support steel of the first rail. And, the front upper end of the second upper support facing the vertical part of the support steel of the second rail is formed in a rounded curved surface to avoid interference with the intersection between the second rail and the vertical part of the support steel of the second rail. Expansion joint repair method, characterized in that to be able to. The method of claim 7,
The first upper support and the second upper support each have a clamping arm that forms a pair on both side surfaces and wraps a vertical part of an adjacent support steel in a state in which the rear end is hinged, and the front end is clamped,
A repair method for an expansion joint, characterized in that a plurality of fastening holes are provided at the distal ends of the pair of clamping arms, respectively, so that a bolt and a nut can be fastened in correspondence with the front and rear widths of adjacent vertical portions of the supporting steel. Between the rail and the support beam in an expansion joint comprising a plurality of rails, and an L-shaped support steel consisting of a vertical portion that is joined to the lower surface of each rail and extends downward and a horizontal portion that extends in a form bent from the lower end of the vertical portion. As a maintenance member for a repair method of an expansion joint for replacing a bearing installed in the support beam and a spring installed between the horizontal portion of the L-shaped support steel,
It is made of a column-shaped body so as to be loaded in an erect state on the upper surface of the horizontal portion of the supporting steel,
A pair of clamping arms are further provided on both sides of the columnar body so that the rear end is rotatable while forming a pair, and the clamping arm has the vertical part of the supporting steel tightly wrapped on both sides, and the tip is formed by a bolt and a nut. A repair member for an expansion joint repair method, characterized in that it is fastened to each other. The method of claim 9,
In the repair member, the front lower end or upper end facing the vertical part of the support steel is formed in a rounded curved surface to avoid interference with the intersection between the vertical part of the support steel and the horizontal part or the intersection between the vertical part of the support steel and the rail. A repair member for an expansion joint repair method, characterized in that.

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