Temporary covering structure and temporary covering method

Abstract

This invention provides a temporary covering method for platform widening or extension that can accommodate both the span of the newly constructed foundation (5.0m) and the span of the connection deck (2.5m), thereby shortening the working time for temporary covering work and reducing the cost of temporary covering work. [Solution] In a temporary covering structure 1 for widening or extending a station platform, the structure comprises multiple support girders 2 extending in the direction X perpendicular to the tracks of the (existing) platform Pf1 and supporting the entire structure, multiple support girders 3 placed perpendicularly on the support girders 2 and supporting the covering plate (connection deck 5), multiple support steel members 4 placed perpendicularly on the support girders 3 and receiving the covering plate (connection deck 5), and a covering plate (connection deck 5) placed on top of the support steel members 4, and these members are fixed and connected to each other with mechanical fixing fittings.

Description

Technical Field

[0001] The present invention relates to a temporary covering structure and a temporary covering method for temporarily covering the surface portion of an extended platform with a covering board during construction of widening (expanding) a station platform in a direction orthogonal to the track or extending (relocating) it along the track.

Background Art

[0002] As a method for temporarily covering a platform during widening or extending a long-span platform with a length of 4.0 m or more corresponding to a conventional home PC floor board (length 5.0 m), it was common to lay square timbers (length 5.0 m) side by side without gaps and temporarily cover them with plywood. On the other hand, in the case of a connection deck (length 2.5 m), construction was carried out using shoring accordingly. However, when constructing a new foundation for platform widening, it was necessary to remove the surrounding shoring and construct a new foundation, resulting in replacement work for setting up the shoring, and there was a problem of poor work efficiency.

[0003] Specifically, when installing temporary columns at a 2.5 m pitch using shoring to support a connection deck (length 2.5 m) and performing temporary covering, there may be a case where a new foundation for platform widening is constructed in the middle of the span, and a situation where the shoring becomes an obstacle occurs. At this time, in the temporary covering structure, when constructing a new foundation, the shoring is once removed to construct the foundation, and replacement work for assembling the shoring at a 2.5 m pitch again occurs. Therefore, there has been a demand for a method that can construct the foundation without replacing the shoring even when constructing a new foundation in the middle of the span. Thus, there has been a demand for a temporary covering method that can correspond to the spans of a new foundation (length 5.0 m) and a connection deck (length 2.5 m) by making it possible to fix the member supporting the connection deck at an arbitrary position.

[0004] For example, Patent Document 1 discloses a platform widening method comprising the steps of: laying multiple transverse girders 3 along the depth direction of the platform; installing guide members 4 so as to be slidable in the depth direction relative to the transverse girders 3; stretching frames 7 between the transverse girders 3 along the extension direction of the track R; laying multiple covering plates 5 on the multiple frames 7 and positioning the leading edges of the covering plates 5 at the initial leading edge position of the platform; sliding the guide members 4 relative to the transverse girders 3 so that the covering plates 5 are pushed out toward the track R side while remaining installed on the frames 7; further laying second covering plates 5 in the space created by the covering plates 5 being pushed out toward the track R side; and removing the covering plates 5, second covering plates, guide members 4 and frames 7, and stretching PC panels over the transverse girders 3 (see Claim 1 of the claims in Patent Document 1, paragraphs

[0011] to

[0027] of the specification, Figures 1 to 7, etc.).

[0005] According to the platform widening method described in Patent Document 1, after the covering plate laying process, the platform is covered by the covering plate and does not obstruct passenger boarding or alighting. Therefore, the covering plate laying process and the widening process can be carried out on separate days. In other words, the covering plate laying process can be carried out the night before the switchover, and the widening process can be carried out on the night of the switchover, thereby reducing the amount of work on the night of the switchover and increasing work efficiency. This allows the work to be carried out safely and reliably.

[0006] However, the platform widening method described in Patent Document 1 is not suitable for temporary covering when widening or extending platforms with long spans of 4.0m or more (for example, 4.0m to 5.0m in length). As mentioned above, the only option was to lay square steel pipes (5.0m in length) in a flat layer and cover them with non-slip plywood. Also, as mentioned above, even when constructing a new foundation for platform widening using a connection deck (2.5m in length), a method was needed that would not require repositioning of the shoring. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Patent No. 4891459 [Overview of the project] [Problems that the invention aims to solve]

[0008] Therefore, the present invention was devised in view of the aforementioned problems, and its objective is to provide a temporary covering method for platform widening or extension that can accommodate the spans of the newly constructed foundation (5.0m) and the connection deck (2.5m), shorten the working time for temporary covering work, and reduce the cost of temporary covering work. [Means for solving the problem]

[0009] The temporary covering structure according to the first invention is a temporary covering structure that is temporarily covered with covering plates during construction work to widen or extend a station platform, and is characterized in that it comprises a plurality of support girders that extend in a direction perpendicular to the tracks of the platform and support the entire structure, a plurality of support girders that are placed perpendicularly on the support girders and support the covering plates, a plurality of support steel members that are placed perpendicularly on the support girders and receive the covering plates, and the covering plates that are placed on the support steel members, and these members are fixed and connected to each other with mechanical fixing fittings.

[0010] The temporary covering structure according to the second invention is characterized in that, in the first invention, the support girder is fixed to the flange of the receiving girder by being clamped in place by a support girder fixing fitting, which is a mechanical fixing fitting of the C-clamp type.

[0011] The temporary covering structure according to the third invention is characterized in that, in the first invention, the receiving steel member is fixed to the flange of the support girder by hooking the claw portion of the receiving steel member onto the flange of the support girder using a mechanical fixing fitting for the receiving steel member, which is a mechanical fixing fitting that fixes by having the claw portion protrude and retract.

[0012] The temporary covering method according to the fourth invention is a temporary covering method for covering a station platform with covering plates during construction work to widen or extend the platform, and is characterized by comprising: a support girder installation step of installing support girders for an extended platform that widens or extends from the existing platform in a direction perpendicular to the tracks; a support girder and support steel installation step of bridging a plurality of support girders that support the covering plates between the support girders installed in the previous step and installing a plurality of support steel members that support the covering plates between the plurality of support girders; a scaffolding board installation step of installing temporary scaffolding boards on the support steel members installed in the previous step; a covering plate installation step of using the scaffolding boards installed in the previous step as a work platform and installing the covering plates on the support steel members; and a height adjustment step of adjusting the height of height adjustment legs provided at the four corners of the covering plate.

[0013] The temporary covering method according to the fifth invention is characterized in that, in the covering plate installation step of the fourth invention, the building clearance on the track side is measured and confirmed, and the first row of covering plates on the track side is positioned and installed so as to be outside the building clearance.

[0014] The temporary covering method according to the sixth invention is characterized in that, in the height adjustment step, the height is adjusted by rotating the bolts of the height adjustment legs using a screwdriver from the upper surface of the covering plate.

[0015] The temporary covering method according to the seventh invention is characterized in that, in the support girder and support steel installation step, the support girder is fixed by clamping it into the flange of the support girder with a support girder fixing fitting, which is a mechanical fixing fitting of the C-clamp type, and the support steel is fixed by hooking the claw portion onto the flange of the support girder with a support steel fixing fitting, which is a mechanical fixing fitting that fixes by protruding and retracting the claw portion. [Effects of the Invention]

[0016] According to the first to seventh inventions, since each component is joined to any position using mechanical fixing fittings, it is possible to accommodate the spans of the newly constructed foundation (5.0m) and the connection deck (2.5m). Moreover, the working time for temporary covering work is shortened, and the platform extension and temporary covering work can be carried out in just one night, which is an extremely short period when trains are not running. As a result, the working cost of temporary covering work can be reduced, and the cost of temporary covering can also be reduced.

[0017] In particular, according to the second, third, and seventh inventions, drilling holes or welding is unnecessary in steel materials such as support beams, bearing beams, or support steel members, and they can be easily and quickly fixed in any position. This is possible to accommodate the 5.0m span of the newly constructed foundation and the 2.5m span of the connection deck, and the working time for temporary covering work can be reduced.

[0018] In particular, according to the fifth invention, the track clearance is measured and confirmed, and the first row of covering plates on the track side is positioned and installed so that it is outside the track clearance. This prevents the need to redo work if it is discovered after installation that the track clearance has been exceeded, and allows the covering work to be completed in a short time.

[0019] In particular, according to the sixth invention, the height adjustment legs are configured to be adjustable in height by screwing them in by rotating them with a screwdriver from the top surface of the lining plate. Therefore, the height of the height adjustment legs can be adjusted by rotating the bolts of the height adjustment legs from the surface (top) side of the lining plate using a screw mechanism, and the height can be easily adjusted in a short time to eliminate the step difference at the four corners of each lining plate in three dimensions according to the required drainage slope. [Brief explanation of the drawing]

[0020] [Figure 1] Figure 1 is a vertical cross-sectional view showing the temporary lining structure according to this embodiment. [Figure 2] Figure 2 is a plan view showing the temporary lining structure described above. [Figure 3] Figure 3 is a side view of the temporary covering structure as seen from the track side. [Figure 4]FIG. 4 is a process explanatory diagram showing the process of installing a receiving girder in the temporary covering method according to an embodiment of the present invention. [Figure 5] FIG. 5 is a process explanatory diagram showing the process of installing a support girder and a receiving steel material in the temporary covering method as described above. [Figure 6] FIG. 6 is a diagram showing a support girder fixing fitting, where (a) is a front view and (b) is a side view. [Figure 7] FIG. 7 is a diagram showing a fitting for fixing a receiving steel material, where (a) is a front view and (b) is a side view. [Figure 8] FIG. 8 is a process explanatory diagram showing the repeating process of the temporary covering method as described above. [Figure 9] FIG. 9 is a process explanatory diagram showing the process of installing a scaffold board in the temporary covering method as described above. [Figure 10] FIG. 10 is a process explanatory diagram showing the process of positioning and installing the first row of covering boards in the temporary covering method as described above. [Figure 11] FIG. 11 is a process explanatory diagram showing the process of installing covering boards in the temporary covering method as described above. [Figure 12] FIG. 12 is a process explanatory diagram showing the height adjustment process of the temporary covering method as described above.

Embodiments for Carrying Out the Invention

[0021] Hereinafter, an embodiment of a temporary covering method and a temporary covering structure when widening or extending a home according to the present invention will be described in detail with reference to the drawings.

[0022] [Temporary Covering Structure] First, the temporary lining structure 1 according to an embodiment of the present invention will be described using Figures 1 to 3. Figure 1 is a vertical cross-sectional view showing the temporary lining structure according to this embodiment. Figure 2 is a plan view showing the temporary lining structure 1 when widening or extending a platform according to this embodiment, and Figure 3 is a side view of the temporary lining structure 1 when widening or extending a platform according to this embodiment, as seen from the track side. In this embodiment, as shown in Figure 1, the existing platform Pf1 is widened by a width of 2100 mm in the direction X perpendicular to the track to provide an extended platform Pf2, and the connecting portion Pfa of the existing platform Pf1 is covered with a temporary lining plate over a width of 1300 mm.

[0023] As shown in Figures 1 to 3, the temporary covering structure 1 according to this embodiment is a temporary covering structure that is temporarily covered with a covering plate (connection deck 5) described later when widening or extending an existing station platform Pf1. This temporary covering structure 1 consists of a plurality of support girders 2,...,2 which are transverse girders that extend in the direction X perpendicular to the tracks of the existing platform Pf1 and support the entire structure, a plurality of support girders 3,...,3 which are longitudinal girders that are placed on these support girders 2 and support the covering plate, a plurality of support steel members 4,...,4 which receive the height adjustment legs of the covering plate, and a plurality of connection decks 5,...,5 which are steel covering plates that are placed on the support steel members 4. This temporary covering structure 1 is a temporary covering structure that temporarily covers the surface of the widened or extended portion with a covering plate when widening or extending a station platform, making it possible for pedestrians to walk on it.

[0024] (support beam) The support girders 2 according to this embodiment consist of H-150×150×7×10 H-shaped steel beams made of general structural rolled steel (SS400) installed with the direction X perpendicular to the railway line as the axial direction, and are installed at predetermined intervals of D1=3775mm or D2=1225mm between centers. These support girders 2 are supported by wedge-type temporary scaffolding as supports. However, the support girders 2 are not limited to wedge-type temporary scaffolding and may be supported by other support materials such as shoring or H-shaped steel beams.

[0025] (Support beam) The support girder 3 according to this embodiment is made of a general structural square steel pipe (STKR) with a thickness t=2.3mm to 12.0mm and a cross-section of 100×100 square. It is placed on the support girder 2 so as to be perpendicular to the axial direction of the support girder 2 and has the function of supporting the decking plates (connection deck 5). Of course, the thickness and diameter of the support girder 3 can be set as appropriate, as long as it has the strength and rigidity to support the decking plates at predetermined intervals of D1 or D2.

[0026] (Support steel) The support steel member 4 according to this embodiment is made of a channel steel of general structural rolled steel (SS400) with dimensions of C75mm x 40mm x 5mm x 7mm. It is stretched between the support girders 3, 3 so as to be perpendicular to the axial direction of the support girders 3, and is installed below the longitudinal end of the connection deck 5 described later, and has the function of supporting the height adjustment legs. In addition, a bolt hole (not shown) is drilled in the longitudinal center of the support steel member 4 and a fixing bolt 4a is attached thereto, and the support steel member 4 also has the function of fixing the connection deck 5 with the fixing bolt 4a.

[0027] (Covering plate) The connection deck 5, which is a covering plate according to this embodiment, is a lightweight covering plate manufactured by Nissho Sangyo Co., Ltd., weighing approximately 57 kg, and is based on a deck body 50 made of a steel box that is rectangular in plan view with dimensions of 500 mm in width, 2500 mm in length, and 50 mm in thickness, and is thin in the vertical direction. However, this connection deck also has a 300 mm wide type for width adjustment, and there are multiple lengths available to suit the construction area: 1100 mm, 1300 mm, 2000 mm, and 2500 mm. In addition, height adjustment legs 51 are attached to the four corners of the deck body 50, which can be adjusted in height by screwing them in using a screwdriver from above (see Figure 12). As a result, the height of the ends of this connection deck 5 can be easily adjusted according to the drainage slope of the platform Pf1, and the ends can be prevented from flapping.

[0028] Furthermore, the various components of the temporary lining structure 1 (support girder 2 and support girder 3, support girder 3 and support steel member 4, and support steel member 4 and connection deck 5) are connected to each other by screwing them together with mechanical fastening fittings (support girder fastening fitting 6, support steel member fastening fitting 7, and fastening bolt 4a), which will be described later. As a result, drilling holes or welding is not required to connect the components, and the work can be completed using only portable tools such as power tools and impact wrenches, which also allows the lining work to be completed in a short amount of time.

[0029] As shown in Figures 1 and 2, a C100×50 end channel steel 8 is attached to the end of the extended platform Pf2 on the side of the existing platform Pf1.

[0030] (Fixing brackets for support beams) Next, the support girder fixing fitting 6 of the temporary lining structure 1 according to this embodiment will be described using Figure 6. As shown in Figure 6, the support girder fixing fitting 6 is a clamp-type mechanical fixing fitting that includes a U-shaped bent steel strip 60, bolt holding parts 61 provided at both ends of the steel strip 60, and bolts 62 that are attached to these bolt holding parts 61 and whose tips are pressed into and abut against the upper flange of the H-shaped steel of the receiving girder 2. The steel strip 60 is wide at the top 63, which is 80 mm wide, and narrow at the sides 64, which is 30 mm wide. This support girder fixing fitting 6 has the function of fixing the support girder 3 at any position on the receiving girder 2 by pressing the upper flange of the receiving girder 2 with the bolts 62 to tension the steel strip 60 and sandwiching the rectangular steel pipe of the support girder 3 between the steel strip 60 and the upper flange. Figure 6 is a diagram showing the support girder fixing fitting 6, where (a) is a front view and (b) is a side view.

[0031] (Fixing bracket for support steel) Next, the support steel fixing fitting 7 of the temporary lining structure 1 according to this embodiment will be described using Figure 7. As shown in Figure 7, the support steel fixing fitting 7 comprises a fitting body 70 that houses a claw-shaped claw portion 7a that can be extended and retracted, and a hooking portion 71 with a U-shaped cross section that is attached to the fitting body 70 and hooks onto the square steel pipe of the support girder 3. By rotating the rotating portion 72 provided at the lower end (end) of the fitting body 70, the claw portion 7a can be extended and retracted, and by rotating the bolt of the rotating portion 72, the claw portion 7a is retracted and pulled in to hook onto the flange portion of the channel steel of the support steel 4, thereby fixing the support steel 4 at any position on the support girder 3. Figure 7 is a diagram showing the support steel fixing fitting 7, where (a) is a front view and (b) is a side view.

[0032] [Temporary covering method] Next, using Figures 1 to 12, a temporary covering method for platform widening or extension according to an embodiment of the present invention will be described. An example will be given in which the existing platform Pf1 is widened by an extended platform Pf2 with a width of 2100 mm in the direction X perpendicular to the tracks, and the connecting portion Pfa of the existing platform Pf1 is covered with a connection deck 5, which is a temporary covering plate, over a width of 1300 mm, to create the temporary covering structure 1 described above.

[0033] (Beam installation process) In the temporary lining method according to an embodiment of the present invention, as shown in Figures 1 and 4, first, a support girder installation step is performed in which a support girder 2 of the extended platform Pf2 is installed so as to widen the platform Pf1 in the direction X perpendicular to the tracks. Figure 4 is an explanatory diagram of the support girder installation step of the temporary lining method according to an embodiment of the present invention.

[0034] In this process, support columns for a wedge-type temporary scaffolding (not shown) are installed, and on top of them, support beams 2 made of H-150 x 150 H-shaped steel are installed at predetermined intervals of 3775 mm center to center.

[0035] In this case, it is preferable that the support girders 2 be inserted into the steel frame under the PC slab of the existing platform Pf1 in advance of the day the main process is carried out, and distributed (divided and distributed) to the vicinity where the support girders 2 will be installed. As suggested in Patent Document 1, if temporary covering such as a connection deck is not installed so that users can walk over the construction area, the platform will be unusable, and completing the process of placing the new floor section (connection deck) on the support girders 2 only at night when the railway is not operating is a process that is difficult in terms of working time.

[0036] (Installation process for support beams and support steel members) Next, as shown in Figure 5, in the temporary lining method according to this embodiment, a support girder and support steel installation step is performed in which support girders 3, 3 are placed between the support girders 2, 2 installed in the previous step, and the aforementioned support girders 3 and support steel members 4 are installed. Figure 5 is a process explanatory diagram showing the support girder and support steel installation step of the temporary lining method according to an embodiment of the present invention.

[0037] As shown in Figure 5, in this process, the support girders 3, 3 are placed across the receiving girders 2, 2 that were installed in the previous process, and as shown in Figure 6, the upper flange of the H-shaped steel of the receiving girder 2 and the square steel pipe of the support girder 3 are clamped and fixed using a support girder fixing bracket 6, which is a mechanical fixing bracket of the type of clamp.

[0038] Then, support steel members 4, 4 made of channel steel are placed across and mounted between the support girders 3, 3 which are fixed to the support girder 2. As shown in Figure 7, the support steel member fixing fitting 7 (mechanical fixing fitting) has a claw portion 7a, and by rotating the bolt of the rotating part 72, the claw portion 7a of the support steel member fixing fitting 7 (mechanical fixing fitting) is extended and retracted, and the claw portion 7a is hooked onto the flange portion of the channel steel of the support steel member 4, thereby fixing the support steel member 4 at any position on the square steel pipe of the support girder 3.

[0039] The fixing bolt 4a shown in Figure 5 is used to secure the connection deck 5 by fastening its longitudinal end to the receiving steel member 4, in conjunction with the pressing force of the height adjustment leg 51.

[0040] As described above, in the temporary lining method according to this embodiment, the support girder 3 is fixed to the support girder 2, and the support steel member 4 is fixed to the support girder 3, using mechanical fixing fittings. Therefore, it is possible to fix the components while making adjustments on-site without having to drill holes in each component at the site. For this reason, it is possible to accommodate both the 5.0m span of the new foundation and the 2.5m span of the connection deck. Moreover, since it is not necessary to drill holes in each component, there is less risk of the components not being able to be installed after welding or the connection deck 5 not fitting properly, and the amount of work that needs to be redone can be reduced. Furthermore, since the work can be completed with only easily portable tools such as power tools and impact wrenches, the working time can be reduced, and the cost of temporary lining work can be reduced as there is no need to bring in large-scale facilities.

[0041] (Repeated process) Next, as shown in Figure 8, in the temporary lining method according to this embodiment, the aforementioned support girder and support steel installation process is repeated to install support girders 3 and support steel 4 according to the required number of connection decks 5 that cover the extended platform Pf2. Figure 8 is a process diagram illustrating the repeated process of the temporary lining method according to the embodiment of the present invention.

[0042] (Scaffolding board installation process) Next, as shown in Figure 9, the temporary covering method according to this embodiment involves a scaffolding board installation step in which temporary scaffolding boards Sb are placed on top of the support steel members 4 installed in the previous step. This is to secure a working platform for the work of installing the connection deck 5 in the next step. Figure 9 is an explanatory diagram of the scaffolding board installation step of the temporary covering method according to an embodiment of the present invention.

[0043] (First row of cover plate positioning and installation process: Cover plate installation process) Next, as shown in Figure 10, in the temporary covering method according to this embodiment, a first-row covering plate positioning and installation step is performed, in which the first row of covering plates on the track side is installed using the scaffolding boards installed in the previous step as a work platform. Specifically, the building clearance on the track side is measured and confirmed, and the connection deck 5, which is the first row of covering plates on the track side, is positioned and installed so that it is outside the building clearance. This is to prevent the need for rework if it is discovered after installation that the building clearance has been exceeded. Then, the connection deck 5, which has been positioned and laid out in the predetermined position as the first row, is temporarily fixed to the support steel material 4 using fixing bolts 4a. Figure 10 is a process explanatory diagram showing the first-row covering plate positioning and installation step of the temporary covering method according to an embodiment of the present invention.

[0044] (Lining board installation process) Next, as shown in Figure 11, the temporary covering method according to this embodiment involves a covering plate installation process in which the remaining connection decks 5 are laid out and installed. Specifically, the second and third rows of connection decks 5 are arranged to match the first row of connection decks 5 on the track side of the extended platform Pf2, which was installed after confirming the building clearance in the previous step, and are sequentially fixed to the support steel members 4 using fixing bolts 4a from the track side. Figure 11 is an explanatory diagram of the covering plate installation process of the temporary covering method according to an embodiment of the present invention.

[0045] (Height adjustment process) Next, as shown in Figure 12, in the temporary covering method according to this embodiment, a height adjustment step is performed to adjust the height of the height adjustment legs 51 of the connection decks 5 that have been laid out and temporarily fixed in place up to the previous step. Specifically, the bolts of the height adjustment legs 51, which are provided near the four corners of the deck body 50, are rotated from the surface (upper surface) side of the connection deck 5 using a screwdriver or the like, causing the height adjustment legs 51 to protrude from the lower surface of the deck body 50 by a screw mechanism, thereby adjusting the height in three dimensions to eliminate the step difference at the four corners of each connection deck 5 according to the required drainage slope. Figure 12 is a process explanatory diagram showing the height adjustment step of the temporary covering method according to an embodiment of the present invention.

[0046] Upon completion of this process, the temporary covering work using the temporary covering method according to this embodiment is completed.

[0047] As described above, the temporary covering structure 1 and temporary covering method according to this embodiment allow each member to be joined at any position using mechanical fixing fittings, making it possible to accommodate the spans of the newly constructed foundation (5.0m) and the connection deck (2.5m). Furthermore, the working time for temporary covering work is shortened, and the platform extension and temporary covering work can be carried out in just one night, which is an extremely short period when trains are not running. As a result, the working cost of temporary covering work can be reduced, and the cost of temporary covering can also be reduced.

[0048] Although the temporary lining structure 1 and temporary lining method according to embodiments of the present invention have been described in detail above, the embodiments described above or illustrated are merely examples of specific embodiments implemented in carrying out the present invention. Therefore, the technical scope of the present invention should not be interpreted as being limited by these embodiments.

[0049] In particular, the example given was the case of widening an existing platform in the direction X perpendicular to the railway tracks, but the present invention can also be applied to cases where an existing platform is extended. [Explanation of symbols]

[0050] 1: Temporary lining structure 2: Support beam (cross beam) 3: Support beam (longitudinal beam) 4: Support steel 5: Connection deck (covering plate) 50: Deck body 51: Height-adjustable legs 6: Fixing hardware for support beams 7: Brackets for fixing the support beam 7a: Claw part 8: End channel steel Pf1: Existing platform Pf2: Expansion Platform Pfa: Connection section (existing platform) Sb: Scaffolding board

Claims

1. A temporary covering structure in which covering plates are used to temporarily cover a station platform during construction work to widen or extend it. The platform comprises multiple support girders extending perpendicular to the track and supporting the entire structure, multiple support girders placed perpendicularly on the support girders and supporting the covering plates, multiple support steel members placed perpendicularly to the support girders and receiving the covering plates, and the covering plates placed on the support steel members, with these members being fixed and connected to each other by mechanical fastening fittings. A temporary covering structure characterized by the following.

2. The support girder is fixed to the flange of the receiving girder by being clamped in place by a support girder fixing bracket, which is a mechanical fixing bracket of the C-clamp type. The temporary lining structure according to claim 1, characterized by the following:

3. The receiving steel member is fixed to the flange of the support girder by a mechanical fixing fitting for the receiving steel member, which is a mechanical fixing fitting that has a claw portion that protrudes and retracts to secure it, with the claw portion hooked onto the flange. The temporary lining structure according to claim 1, characterized by the following:

4. A temporary covering method in which covering plates are used when widening or extending a station platform, The process involves installing support girders for an extended platform that widens or extends from the existing platform in a direction perpendicular to the tracks, and A support girder and support steel installation step, in which multiple support girders are placed between the support girders installed in the previous step to support the covering plates, and multiple support steel members are installed between the multiple support girders to support the covering plates, A scaffolding board installation step involves installing temporary scaffolding boards on top of the support steel members installed in the previous step, A covering plate installation step in which the covering plate is installed on the support steel material using the scaffolding boards installed in the previous step as a work platform, The aforementioned covering plate is equipped with a height adjustment step for adjusting the height of height-adjusting legs provided at the four corners. A temporary covering method characterized by the following.

5. In the aforementioned process of installing the covering plates, the clearance on the track side is measured and confirmed, and the first row of covering plates on the track side is positioned and installed so that it is outside the clearance. The temporary covering method according to claim 4, characterized by the above.

6. In the height adjustment process, the height is adjusted by rotating the bolts of the height adjustment legs using a screwdriver from the upper surface of the covering plate. The temporary covering method according to claim 4, characterized by the above.

7. In the process of installing the support girder and support steel members, the support girder is fixed by clamping it into the flange of the support girder using a support girder fixing bracket, which is a mechanical fixing bracket of the C-clamp type, and the support steel members are fixed by hooking the claw portion onto the flange of the support girder using a support steel member fixing bracket, which is a mechanical fixing bracket that fixes by protruding and retracting the claw portion. The temporary covering method according to claim 4, characterized by the above.

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