Temporary lining structure and temporary lining method

Abstract

To provide a temporary lining method for widening or extending a platform that can accommodate the span of a new foundation (5.0 m) and the span of a connection deck (2.5 m), shortens the work time for temporary lining work, and reduces the cost of temporary lining work. [Solution] The temporary covering structure 1 is temporarily covered with a covering plate (connection deck 5) during construction to widen or extend a station platform. The structure comprises multiple support girders 2 that extend in the direction X perpendicular to the tracks of the (existing) platform Pf1 and support the entire structure, multiple support girders 3 that are placed perpendicular to the support girders 2 and support the covering plate (connection deck 5), multiple support steel members 4 that are placed perpendicular to the support girders 3 and support the covering plate (connection deck 5), and a covering plate (connection deck 5) that is placed on the support steel members 4, and these components are fixed and connected together with mechanical fixing brackets.

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 expanded or extended platform with a covering plate during construction work to expand (extend) a station platform in a direction perpendicular to the track or to extend (relocate) it along the track. [Background technology]

[0002] When widening or extending a platform with a long span of 4.0 m or more, which corresponds to the conventional platform PC floorboards (5.0 m long), the usual method of temporary covering the platform was to lay square timbers (5.0 m long) in a solid line without any gaps and then temporarily cover them with plywood. On the other hand, in the case of connection decks (2.5 m long), construction was carried out using corresponding shoring. However, when constructing a new foundation for widening the platform, it was necessary to remove the surrounding shoring and build the new foundation, which required the work of assembling and removing the shoring, which created the problem of poor work efficiency.

[0003] Specifically, when temporary lining is performed by installing temporary supports at 2.5-m intervals using shoring to support the connection deck (2.5 m long), new foundations for platform widening may be constructed midway through the span, resulting in the shoring getting in the way. In this case, when constructing the new foundation, the shoring must be removed, the foundation must be constructed, and then the shoring must be reassembled at 2.5-m intervals. Therefore, a method was needed to construct the foundation without replacing the shoring, even when constructing a new foundation midway through the span. Therefore, a temporary lining method was needed that would allow the members supporting the connection deck to be fixed in any position, and be compatible with both the span of the new foundation (5.0 m long) and the span of the connection deck (2.5 m long).

[0004] For example, Patent Document 1 discloses a platform widening method including the steps of: laying a plurality of cross girders 3 along the depth direction of the platform; installing guide members 4 on the cross girders 3 so that they can slide in the depth direction; spanning frames 7 between the cross girders 3 along the extension direction of the track R; laying a plurality of lining plates 5 on the plurality of frames 7 and positioning the tips of the lining plates 5 at initial tip positions of the platform; sliding the guide members 4 relative to the cross girders 3 so that the lining plates 5 are pushed toward the track R while still installed on the frames 7; laying a second lining plate 5 in the space created by the lining plate 5 being pushed toward the track R; and removing the lining plates 5, the second lining plate, the guide members 4, and the frames 7 and spanning a PC plate over the cross girders 3 (see claim 1 in the Scope of Claims of Patent Document 1, paragraphs

[0011] to

[0027] of the specification, and 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 with covering plates and does not interfere with passengers getting on and off, so the covering plate laying process and the widening process can be carried out on different 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 the night of the switchover, which reduces the amount of work on the night of the switchover and improves 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 long-span platforms with lengths of 4.0 m or more (for example, lengths of 4.0 m to 5.0 m), and as mentioned above, the only option was to lay square steel pipes (5.0 m long) flat and temporarily cover them with non-slip plywood. Also, as mentioned above, there was a need for a construction method that would not require replacing shoring, even when building a new foundation for platform widening using a connection deck (2.5 m long). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 4891459 Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, the present invention was devised in consideration of the above-mentioned problems, and its purpose is to provide a temporary casing method for widening or extending a platform that can accommodate the span of both the new foundation (5.0 m) and the connection deck (2.5 m), shortens the work time for temporary casing work, and reduces the cost of temporary casing 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 when widening or extending a station platform, and extends in a direction perpendicular to the track of the platform and supports the entire structure. Made of H-shaped steel A plurality of support girders and a covering plate placed perpendicular to the support girders to support the covering plate. Made of square steel pipes A plurality of support girders and a support plate placed perpendicular to the support girders to receive the covering plate. Consists of channel steel The structure includes a plurality of support steel members and the covering plate placed on the support steel members, and these members are fixed and connected to each other with mechanical fixing brackets. Made of square steel pipes The support girder is Made of H-shaped steel The flange of the support beam The steel strip is bent into a U-shape, and includes a bolt holder provided at each end of the steel strip, and a bolt attached to the bolt holder and having its tip pressed into contact with the upper flange of the H-shaped steel of the support beam. Support beam fixing bracket Therefore, Sandwich it At any position Fixed, Consists of channel steel The receiving steel material is The support beam is provided with a U-shaped cross-section hook portion for hooking the square steel pipe of the support beam, and by rotating the bolt of the rotating portion provided at the lower end, the claw portion is protruded and recessed, and hooked onto the flange of the channel steel of the support beam, thereby fixing the support beam at any position of the support beam. Bracket for fixing steel Therefore, The aforementioned At any position on the square steel pipe It is characterized by being fixed.

[0012] No. 2 The temporary covering method according to the present invention is a temporary covering method for covering a station platform with a covering plate during construction work to widen or extend the platform, and is for an extension platform that extends from the existing platform in a direction perpendicular to the tracks to widen or extend the platform. Made of H-shaped steelA support beam installation process in which support beams are installed, and a covering plate is supported between the support beams installed in the previous process. Made of square steel pipes A plurality of support girders are spanned, and the covering plate is received between the plurality of support girders. Consists of channel steel The method includes a support girder and support steel material installation process in which a plurality of support steel materials are installed, a scaffolding board installation process in which temporary scaffolding boards are installed on the support steel materials installed in the previous process, a covering board installation process in which the scaffolding boards installed in the previous process are used as a work floor and the covering board is installed on the support steel materials, and a height adjustment process in which the height of height adjustment legs provided at the four corners of the covering board is adjusted. In the support girder and support steel material installation process, The support girder, which is made of a square steel pipe, is clamped and fixed at a desired position to the flange of the support girder, which is made of an H-shaped steel, using a support girder fixing bracket that includes a strip steel plate bent into a U-shape, bolt holding portions provided on both ends of the strip steel plate, and bolts that are attached to the bolt holding portions and have their tips pressed into contact with the upper flange of the H-shaped steel of the support girder.The support steel, which is made of a channel steel, is attached to a flange of the support girder, and is fixed at a desired position to the square steel pipe using a support steel fixing bracket that includes a U-shaped cross-section hook portion that hooks the square steel pipe of the support girder, and by rotating the bolt of a rotating portion provided at the lower end, the claw portion is protruded and recessed to hook the support steel onto the flange of the channel steel of the support steel. It is characterized by being fixed.

[0013] No. 3 The temporary lining method according to the present invention is 2 In the invention, the covering plate installation process is characterized in that the track side construction gauge 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 construction gauge.

[0014] No. 4 The temporary lining method according to the present invention is 2 In the invention, the height adjustment step is characterized in that the height is adjusted by rotating the bolts of the height adjustment legs using a screwdriver from the upper surface of the covering plate. [Effects of the Invention]

[0016] First Invention to Third Invention 4 According to the invention, each component can be joined at any position using mechanical fixing brackets, making it possible to accommodate the span of the new foundation (5.0 m) and the connection deck (2.5 m). Furthermore, the time required for temporary lining work can be shortened, allowing the platform extension and temporary lining work to be completed in just one nighttime work day, an extremely short period when trains are not running. This reduces the cost of the temporary lining work, and therefore the cost of the temporary lining work itself. Furthermore, according to the first to fourth inventions, there is no need to drill holes or weld steel materials such as support girders, supporting girders, or support steel materials, and they can be easily fixed in any position in a short time.This makes it possible to accommodate both the 5.0 m span of the new foundation and the 2.5 m span of the connection deck, thereby shortening the working time for temporary lining work.

[0018] In particular, 3According to the invention, the construction gauge 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 construction gauge.This prevents the need to go back and complete the covering work after installation because it is discovered that the construction gauge has been exceeded, and allows the covering work to be completed in a short time.

[0019] In particular, 4 According to the invention, the height-adjustable legs are configured to be screw-type and adjustable in height by rotating them using a screwdriver from the top surface of the covering plate.Therefore, the height of the height-adjustable legs can be adjusted using a screw mechanism by rotating the bolts of the height-adjustable legs from the surface (top) side of the covering plate, and height adjustments can be made easily and in a short time to eliminate the steps at the four corners of each covering plate in three dimensions according to the required drainage gradient. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a vertical cross-sectional view showing the temporary covering structure according to this embodiment. [Figure 2] FIG. 2 is a plan view showing the temporary covering structure. [Figure 3] FIG. 3 is a side view of the temporary covering structure as viewed from the track side. [Figure 4] FIG. 4 is a process explanatory diagram showing the support girder installation process of the temporary lining method according to the embodiment of the present invention. [Figure 5] FIG. 5 is a process explanatory diagram showing the support girder and supporting steel material installation process of the temporary lining method. [Figure 6] FIG. 6 shows the support girder fixing bracket, where (a) is a front view and (b) is a side view. [Figure 7] FIG. 7 shows a metal 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 steps of the temporary lining method. [Figure 9] FIG. 9 is a process explanatory diagram showing the scaffolding board installation process of the temporary covering method. [Figure 10] FIG. 10 is a process explanatory diagram showing the first row lining plate positioning and installation process of the temporary lining method. [Figure 11] FIG. 11 is a process explanatory diagram showing the lining plate installation process of the temporary lining method. [Figure 12] FIG. 12 is a process explanatory diagram showing the height adjustment process of the temporary lining method. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, one embodiment of the temporary lining method and temporary lining structure for widening or extending a platform according to the present invention will be described in detail with reference to the drawings.

[0022] [Temporary covering structure] First, a temporary covering 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 covering structure according to this embodiment. Figure 2 is a plan view showing the temporary covering structure 1 according to this embodiment when widening or extending a platform, and Figure 3 is a side view of the temporary covering structure 1 according to this embodiment when widening or extending a platform, as viewed from the track side. In this embodiment, as shown in Figure 1, an example will be described in which the existing platform Pf1 is widened by 2100 mm in the direction perpendicular to the track X to provide an extended platform Pf2, and the connection portion Pfa of the existing platform Pf1 is covered with a temporary covering plate over a width of 1300 mm.

[0023] As shown in FIGS. 1 to 3 , the temporary lining structure 1 according to this embodiment is a temporary lining structure that is temporarily covered with a lining plate (connection deck 5) described below during construction to widen or extend an existing platform Pf1 at a station. This temporary lining structure 1 is composed of a plurality of support girders 2,...,2, which are horizontal beams that extend in the direction perpendicular to the tracks X of the existing platform Pf1 and support the entire structure, a plurality of support girders 3,...,3, which are vertical beams that are placed on these support girders 2 and support the lining plate, a plurality of support steel members 4,...,4 that support the height-adjustable legs of the lining plate, and a plurality of connection decks 5,...,5, which are steel lining plates placed on the support steel members 4. This temporary lining structure 1 is a temporary lining structure that is temporarily covered with a lining plate to allow pedestrians to walk on the surface of the widened or extended section during construction to widen or extend a station platform.

[0024] (receiving beam) The support girders 2 according to this embodiment are made of H-shaped steel beams of H-150 x 150 x 7 x 10 made of general structural rolled steel (SS400) and installed with their axial direction aligned with the track-perpendicular direction X, and are installed at predetermined intervals of D1 = 3775 mm or D2 = 1225 mm center-to-center. 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 girder) The support girder 3 according to this embodiment is made of a general structural square steel pipe (STKR) with a thickness t of 2.3 mm to 12.0 mm and a square cross section of 100 x 100, and 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 lining plate (connection deck 5). Of course, the thickness and diameter of the support girder 3 can be set appropriately as long as it has the strength and rigidity to support the lining plate at the specified intervals of D1 or D2.

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

[0027] (Covering plate) The connection deck 5, a lining plate according to this embodiment, is a lightweight lining plate manufactured by Nisso Sangyo Co., Ltd., weighing approximately 57 kg. The base deck is a steel box-shaped deck body 50, which is rectangular in plan view (rectangular shape) and thin in the vertical direction, measuring 500 mm wide, 2500 mm long, and 50 mm thick. However, this connection deck is also available in a 300 mm wide version for width adjustment, and is available in multiple lengths depending on the construction scope: 1100 mm, 1300 mm, 2000 mm, and 2500 mm. In addition, height-adjustable legs 51 are attached to the four corners of the deck body 50, allowing for height adjustment by rotating them with a screwdriver from above (see Figure 12). This allows for easy height adjustment of the ends of the connection deck 5 according to the drainage gradient of the platform Pf1, preventing the ends from flapping.

[0028] Furthermore, the individual components of the temporary lining structure 1 (support girder 2 and support girder 3, support girder 3 and support steel material 4, support steel material 4 and connection deck 5) are fastened and connected to one another using mechanical fixing fixtures (support girder fixing fixtures 6, support steel material fixing fixtures 7, fixing bolts 4a) described below. This eliminates the need to drill or weld holes between the individual components, and the work can be completed using only easily 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 FIGS. 1 and 2, an end channel steel 8 of C100×50 is attached to the end of the extension platform Pf2 on the side of the existing platform Pf1.

[0030] (Support beam fixing bracket) Next, the support girder fixing bracket 6 of the temporary casing structure 1 according to this embodiment will be described with reference to FIG. 6 . As shown in FIG. 6 , the support girder fixing bracket 6 is a mechanical fixing bracket of a clasp type, including a steel strip 60 bent into a U-shape, bolt holders 61 provided at both ends of the steel strip 60, and bolts 62 attached to the bolt holders 61 and having their tips pressed into contact with the upper flange of the H-shaped steel of the support girder 2. The steel strip 60 has a wide upper portion 63 (80 mm wide) and a narrow side portion 64 (30 mm wide). The support girder fixing bracket 6 functions to press the upper flange of the support girder 2 with the bolts 62 to tension the steel strip 60, thereby sandwiching the square steel pipe of the support girder 3 between the steel strip 60 and the upper flange, thereby fixing the support girder 3 at any position on the support girder 2. FIG. 6 shows the support girder fixing bracket 6, with (a) being a front view and (b) being a side view.

[0031] (Metal fittings for fixing support steel) Next, the metal fitting 7 for fixing a support steel member of the temporary lining structure 1 according to this embodiment will be described with reference to FIG. 7. As shown in FIG. 7, the metal fitting 7 for fixing a support steel member includes a metal fitting body 70 that accommodates a claw-shaped claw portion 7a so that it can be freely extended and retracted, and a hook portion 71 with a U-shaped cross section that is attached to the metal fitting body 70 and hooks a square steel pipe of the support girder 3. The metal fitting 7 for fixing a support steel member is configured so that the claw portion 7a can be freely extended and retracted by rotating a rotating portion 72 provided at the lower end (end) of the metal fitting body 70. By rotating the bolt of the rotating portion 72, the claw portion 7a is retracted and 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 support girder 3. FIG. 7 shows the metal fitting 7 for fixing a support steel member, with (a) being a front view and (b) being a side view.

[0032] [Temporary lining method] Next, a temporary lining method for widening or extending a platform according to an embodiment of the present invention will be described using Figures 1 to 12. The method will be described taking as an example a case in which the existing platform Pf1 is widened in the direction perpendicular to the track X by an extension platform Pf2 by a width of 2100 mm, and the connection portion Pfa of the existing platform Pf1 is lined over a width of 1300 mm with a connection deck 5, which is a temporary lining plate, to form the temporary lining structure 1.

[0033] (Support girder installation process) In the temporary casing method according to an embodiment of the present invention, as shown in Figures 1 and 4, first, a support girder installation process is carried out to install support girders 2 for an extension platform Pf2 so as to widen the existing platform Pf1 in the direction perpendicular to the tracks X. Figure 4 is a process explanatory diagram showing the support girder installation process of the temporary casing method according to an embodiment of the present invention.

[0034] In this process, the support pillars of a wedge-type temporary scaffolding (not shown) are installed, and on top of them, support girders 2 made of H-150 x 150 H-shaped steel are installed at a specified interval, such as 3775 mm, center-to-center.

[0035] At this time, it is preferable to insert the support girders 2 into the steel framework below the PC deck of the existing platform Pf1 beforehand on the day this process is carried out, and distribute (divide and distribute) them in the vicinity of where the support girders 2 will be installed. As suggested in Patent Document 1, unless a temporary covering such as a connection deck is provided to allow users to walk on the construction area, the platform will be unusable, and also, completing the process of placing the new floor section (connection deck) on the support girders 2 only at night when the trains are not running is a very time-consuming process.

[0036] (Support girder and support steel installation process) Next, as shown in Fig. 5, in the temporary casing method according to this embodiment, a support girder and supporting steel material installation step is carried out in which support girders 3, 3 are placed between the support girders 2, 2 installed in the previous step, and the support girders 3 and supporting steel material 4 are installed. Fig. 5 is a process explanatory diagram showing the support girder and supporting steel material installation step of the temporary casing method according to an embodiment of the present invention.

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

[0038] Then, support steel members 4, 4 made of channel steel are placed across the support girders 3, 3 fixed to the support girder 2, and as shown in Figure 7, the support steel member has a claw portion 7a, and by rotating the bolt of the rotating portion 72, the claw portion 7a is protruded and recessed, and the claw portion 7a of the support steel member fixing bracket 7 (mechanical fixing bracket) is pulled in and 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 a bolt that fixes and hooks the longitudinal end of the connection deck 5 to the receiving steel material 4, thereby fixing the connection deck 5 in place in conjunction with the pressing force of the height-adjustable leg 51.

[0040] As described above, in the temporary lining method according to this embodiment, the support girders 3 are fixed to the support girders 2, and the support steel members 4 are fixed to the support girders 3 using mechanical fasteners. This eliminates the need for on-site drilling of each component, allowing for on-site adjustments during the lining process. This allows for the 5.0-m span of the new foundation and the 2.5-m span of the connection deck. Furthermore, since drilling of each component is not required, there is less risk of components not being able to be installed by welding or the connection deck 5 not fitting properly, reducing the need for rework. Furthermore, the work can be completed using only portable tools such as power tools and impact wrenches, thereby reducing work time and the need for large-scale facilities, thereby reducing the cost of the temporary lining work.

[0041] (Repeat process) Next, as shown in Fig. 8, in the temporary casing method according to this embodiment, the above-mentioned support girder and supporting steel material installation process is repeated to install support girders 3 and supporting steel materials 4 according to the required number of connection decks 5 covering the extension platform Pf2. Fig. 8 is a process explanatory diagram showing the repeated process of the temporary casing method according to an embodiment of the present invention.

[0042] (Scaffolding board installation process) Next, as shown in Fig. 9, in the temporary casing method according to this embodiment, a scaffolding board installation process is carried out in which temporary scaffolding boards Sb are placed and installed on the support steel material 4 installed in the previous process. This is to ensure a working floor for the work of installing the connection deck 5 in the next process. Fig. 9 is a process explanatory diagram showing the scaffolding board installation process of the temporary casing method according to this embodiment of the present invention.

[0043] (First row lining plate positioning and installation process: lining plate installation process) Next, as shown in Figure 10, in the temporary casing method according to this embodiment, a first-row casing plate positioning and installation process is performed, in which the scaffolding boards installed in the previous process are used as a work platform to install the first row of casing plates on the track side. Specifically, the track-side construction gauge is measured and confirmed, and the connection deck 5, which is the first row of casing plates on the track side, is positioned and installed so that it is outside the construction gauge. This is to prevent the discovery of a construction gauge violation after installation, which would require backtracking. Then, the connection deck 5, positioned and laid in the specified 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 casing plate positioning and installation process of the temporary casing method according to this embodiment.

[0044] (Lining board installation process) Next, as shown in Fig. 11, in the temporary lining method according to this embodiment, a lining plate installation process is carried out in which the remaining connection decks 5 are laid out and installed. Specifically, the second and third rows of connection decks 5 are arranged in accordance with the first row of connection decks 5 on the track side of the extension platform Pf2, which was installed in the previous process after confirming the construction gauge, and are fixed to the support steel material 4 sequentially from the track side using fixing bolts 4a. Fig. 11 is a process explanatory diagram showing the lining plate installation process of the temporary lining method according to an embodiment of the present invention.

[0045] (Height adjustment process) Next, as shown in Fig. 12, in the temporary lining method according to this embodiment, a height adjustment step is carried out to adjust the height of the height-adjustable legs 51 of the connection decks 5 that have been laid out and temporarily fixed prior to the previous step. Specifically, the height-adjustable legs 51 provided near the four corners of the deck body 50 are rotated by using a screwdriver or the like to rotate the bolts of the height-adjustable legs 51 from the surface (top) side of the connection deck 5, and the height-adjustable legs 51 are protruded and retracted from the underside of the deck body 50 using a screw mechanism, thereby adjusting the height so as to eliminate the steps at the four corners of each connection deck 5 in three dimensions according to the required drainage gradient. Fig. 12 is a process explanatory diagram showing the height adjustment step of the temporary lining method according to an embodiment of the present invention.

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

[0047] According to the temporary casing structure 1 and temporary casing method of this embodiment described above, each component can be joined at any position using mechanical fixings, making it possible to accommodate the span of the new foundation (5.0 m) and the span of the connection deck (2.5 m).Furthermore, the work time for temporary casing work can be shortened, allowing the platform extension work and temporary casing work to be completed in just one nighttime work day, an extremely short period when trains are not running.As a result, the work cost of the temporary casing work can be reduced, and the temporary casing costs can also be reduced.

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

[0049] In particular, the case where an existing platform is widened in the direction perpendicular to the tracks X has been described as an example, but the present invention can also be applied to the case where an existing platform is extended. [Explanation of symbols]

[0050] 1: Temporary covering structure 2: Support beam (cross beam) 3: Support beam (vertical beam) 4: Support steel 5: Connection deck (covering plate) 50: Deck body 51: Height adjustable legs 6: Support beam fixing bracket 7: Bracket for fixing the support beam 7a: Claw part 8: End channel steel Pf1: Existing platform Pf2: Extended Platform Pfa: Connection part (existing platform) Sb: Scaffolding board

Claims

1. A temporary covering structure that is temporarily covered with a covering plate during construction to widen or extend a station platform, The structure comprises a plurality of support girders made of H-shaped steel that extend in a direction perpendicular to the tracks of the platform and support the entire structure, a plurality of support girders made of square steel pipes that are placed perpendicular to the support girders and support the lining plate, a plurality of support steel members made of channel steel that are placed perpendicular to the support girders and support the lining plate, and the lining plate that is placed on the support steel members, and these members are fixed and connected to each other with mechanical fixing metal fittings, The support girder made of a square steel pipe is fixed at any position by being clamped to the flange of the receiving girder made of H-shaped steel with a support girder fixing bracket having a strip steel plate bent into a U-shape, bolt holding portions provided at both ends of the strip steel plate, and bolts attached to the bolt holding portions and having their tips pressed into contact with the upper flange of the H-shaped steel of the receiving girder, The support steel, which is made of a channel steel, has a hook portion with a U-shaped cross section that hooks the square steel pipe of the support girder, and by rotating the bolt of the rotating portion provided at the bottom end, the claw portion is protruded and recessed to hook onto the flange of the channel steel of the support steel, and the support steel is fixed at any position of the square steel pipe by a support steel fixing metal fitting that fixes the support steel at any position of the support girder. A temporary covering structure characterized by the above.

2. A temporary covering method for temporarily covering a station platform with a covering plate during construction to widen or extend the platform, a support girder installation process for installing support girders made of H-shaped steel for an extension platform that extends from the existing platform in a direction perpendicular to the tracks to widen or extend the platform; a support girder and support steel material installation process in which a plurality of support girders made of square steel pipes that support the lining plate are laid between the support girders installed in the previous process, and a plurality of support steel materials made of channel steel that receive the lining plate are installed between the plurality of support girders; a scaffolding board installation process in which temporary scaffolding boards are installed on the support steel material installed in the previous process; a covering plate installation process in which the scaffolding plate installed in the previous process is used as a work floor and the covering plate is installed on the receiving steel material; A height adjustment step is provided to adjust the height of height adjustment legs provided at the four corners of the covering plate, In the support girder and receiving steel installation process, the support girder, which is made of a square steel pipe, is clamped and fixed at a desired position to the flange of the receiving girder, which is made of an H-shaped steel, using a support girder fixing bracket that includes a steel strip bent into a U-shape, bolt holders provided on both ends of the steel strip, and bolts that are attached to the bolt holders and have their tips pressed into contact with the upper flange of the H-shaped steel of the receiving girder. The receiving steel, which is made of a channel steel, is fixed at a desired position on the square steel pipe using a receiving steel fixing bracket that includes a U-shaped cross-section hook portion that hooks the square steel pipe of the support girder, and by rotating the bolt of a rotating portion provided at the lower end, the claw portion is protruded and recessed to hook onto the flange of the channel steel of the receiving steel, thereby fixing the receiving steel at a desired position on the support girder. A temporary covering method characterized by the above.

3. In the covering plate installation process, the construction gauge 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 construction gauge.

3. The temporary lining method according to claim 2,

4. 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.

3. The temporary lining method according to claim 2,

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