JP2020007788A - Layered panel floor slab bridge and construction method of layered panel slab bridge - Google Patents

Abstract

To provide a layered panel floor slab bridge and method for constructing the same capable of easily and quickly forming a floor slab without the need for a hoist and associated technician.SOLUTION: A layered panel floor slab bridge is a bridge using a plurality of layered panels for a floor slab. A layered panel 200 has a core member 210 and a surface member 220 being thinner than the core member, and has a structure in which the surface members are laminated on both sides of the core member. The floor slab is formed by laying a plurality of the layered panels in the bridge axis direction and fixing the layered panels on a support girder. It is also possible to use a layered panel whose surface material has been subjected to non-slip processing, or a layered panel to which a balustrade has been bolted using bolt holes provided at the end of the layered panel.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a technique relating to a bridge, and more specifically, to a layered panel floor slab bridge using lightweight layered panels for a floor slab, and a method of constructing the same.

  In recent years, the replacement work of bridge decks has been performed frequently. This is mainly because remarkable deterioration phenomenon was observed in the floor slab as a result of continuously receiving the repeated load due to the passage of the vehicle for many years or as a result of salt damage caused by an anti-freezing agent or the like. If the deterioration of the floor slab is partial or insignificant, repair or reinforcement may be used, but if the extent and degree of deterioration is large, the existing floor slab is removed with the main girder remaining New slabs are often installed.

When the existing slab is a concrete slab, a precast concrete slab is frequently used as a newly installed slab. Precast concrete slabs are preferred because they are lightweight, have excellent long-term durability, are capable of shortening on-site construction, and are of high quality such as the use of high-strength concrete (σ = 50 N / mm ² ) in recent years. It is used. For example, Patent Literature 1 also discloses a technology relating to the installation of a precast floor slab, and discloses an invention in which a composite structure with a steel girder is constructed while securing the degree of freedom in the arrangement plan of PC steel materials.

  On the other hand, materials other than concrete are sometimes used for bridge decks. A typical example is a steel slab, and other wooden slabs are sometimes used. For example, Patent Literature 2 proposes a wooden bridge using a long laminated wood as a floor slab for one purpose of “effective use of small-diameter trees and thinned wood generated for proper maintenance of forests”.

JP 2018-040168 A JP 2000-226811 A

  If a precast concrete slab as shown in Patent Document 1 is used, the slab installation work on site can significantly shorten the process as compared with cast-in-place concrete. As a result, the traffic on the existing bridge can be released immediately, which is extremely suitable for both the user and the manager. However, since the precast concrete slab is made of concrete, it is considerably heavy, and therefore it is naturally difficult to transport and install the slab manually, and a hoist such as a crane is usually used. For this reason, the cost of hoisting equipment is required, and it is also necessary to secure heavy equipment operators and specialized engineers such as slingers.Furthermore, there is a risk of accidents associated with the work of hoisting equipment. Had become a big task.

  As shown in Patent Document 2, it is conceivable to use a wooden material having a small unit volume weight as a floor slab. However, if the prestressed wooden slab proposed by this document is adopted, the thickness of the floor slab is inevitably considerable. That is, as a result, the entire slab becomes considerably heavy, and the prestressed wooden slab does not solve the problem of installation work of the precast concrete slab.

  An object of the present invention is to solve the problems of the prior art, that is, a layered panel capable of easily and quickly forming a floor slab without the need for a crane and an associated technical expert. An object of the present invention is to provide a deck bridge and a method for constructing the bridge.

  The present invention has been made by paying attention to the fact that a bridge slab is formed by using a layered panel in which a core material and a thin surface material are laminated on both surfaces thereof, and is based on an idea which has not existed in the past. It is an invention made.

  The layered panel floor slab bridge of the present invention is a bridge using a plurality of layered panels for the floor slab. The layered panel has a “core material” and a “surface material” thinner than the core material, and has a structure in which surface materials are laminated on both sides of the core material. The floor slab is formed by laying a plurality of layered panels and fixing (for example, adhesively fixing) the layered panels on a support beam. In addition, it is also possible to use a layered panel in which a surface material is subjected to a non-slip process, or to use a bolt hole provided at an end portion of the layered panel to fix a railing to the layered panel with bolts. You can also. Note that a balsa material can be used as the core material.

  In the layered panel deck bridge of the present invention, the layered panel may be fixed to the support girder by a fixture. This fixture has an upper flange, a lower flange, and a connecting rod, and the upper flange and the lower flange are connected by a connecting rod. The connecting rod penetrates the layered panel and the upper and lower flanges sandwich the layered panel and a part of the support girder, thereby fixing the layered panel to the support girder.

  In the layered panel floor bridge of the present invention, the layered panel may be fixed to the support beam by a fixing device different from the above. This fixing tool includes a penetrating body, a lower flange, and a connecting rod, and the penetrating body and the lower flange are connected by a connecting rod. Then, the penetrator is fixed in the layered panel, and the layered panel and a part of the support beam are sandwiched between the penetrator and the lower flange, whereby the layered panel is fixed to the support beam.

  The layered panel floor slab bridge of the present invention can use a layered panel in which the surface material is FRP and the core material is wood, or a layered panel in which the surface material is GFRP containing glass fiber. It can also be done. When a layered panel whose surface material is GFRP is used, the layered panel is laid on the supporting girder so that the arrangement direction of the glass fibers is the direction perpendicular to the bridge axis or the bridge axis direction. The layered panel deck bridge of the present invention is a layered panel having a weight of 50 kg or less, a layered panel having a total thickness of 59 mm or more and 93 mm or less, or a surface material having a thickness of 3 mm or more and 4 mm or less. It is also possible to use a layered panel that is as follows.

  The method for constructing a layered panel floor slab bridge of the present invention is a method for constructing a layered panel floor slab bridge, which includes an adhesive application step, a floor slab installation step, and a bridge installation step. In the adhesive application step, a mold is placed on the support girder and the adhesive is applied inside the mold, or the adhesive is directly applied on the support girder without setting the mold and the floor is In the slab installation step, a floor slab is formed by laying a plurality of the layered panels in the bridge axis direction by manual power, and in the column installation step, the column is laid using bolt holes provided at the ends of the layered panel. Bolt.

  The layered panel deck bridge construction method of the present invention can be a method further including a temporary fixing step and a fixture releasing step. In the temporary fixing step, after the floor slab setting step, the layered panel is temporarily fixed to the supporting girder by a fixing tool (having an upper flange, a lower flange and a connecting rod and connecting the upper flange and the lower flange with the connecting rod). Then, in the fixture releasing step, the fixture is removed after the bonding portion is cured. In the temporary fixing step, the connecting rod is penetrated through the layered panel, and the layered panel and a part of the support beam are sandwiched by the upper flange and the lower flange, thereby temporarily fixing the layered panel to the support beam. Alternatively, the layered panel can be temporarily fixed to the support girder by using a fixture having a penetrating body, a lower flange, and a connecting rod and connecting the penetrating body and the lower flange with a connecting rod. In the temporary fixing step in this case, the penetrator is fixed in the layered panel, and at the same time, the layered panel and a part of the support girder are sandwiched between the penetrator and the lower flange, thereby temporarily fixing the layered panel to the support girder.

The layered panel slab bridge and the method for constructing the layered panel slab bridge of the present invention have the following effects.
(1) Since the layered panel is lightweight, it can be transported and installed by human power, so that the floor slab can be formed easily and quickly. In addition, since a hoist is not used for forming the floor slab, the cost for the hoist and a specialized engineer is not required, and the construction can be performed safely without a risk of an accident associated with the hoist operation.
(2) Since the surface material of the layered panel is subjected to anti-slip processing, it is not necessary to lay pavement again. Also, since various colors and patterns can be applied to the surface material, floor slabs with various colors and patterns can be formed as required.
(3) Since small holes can be easily provided in the layered panel, various accessories such as a railing can be attached to the floor slab by using the small holes.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the basic structure of the layered panel floor slab bridge of this invention. (A) is a plan view showing a floor slab in which a plurality of layered panels divided in a direction perpendicular to the bridge axis are arranged on a main girder, and (b) is a plan view showing a floor slab in which a plurality of layered panels are arranged on a horizontal girder. . Sectional drawing which divided | segmented the layered panel 200 for every member. FIG. 4 is a partial perspective view showing a surface material subjected to anti-slip processing by a convex portion and embossing. Sectional drawing which fixed the layered panel to the support girder by the fixing tool of both flange type. FIG. 4 is a partial cross-sectional view in which a layered panel is fixed to a support girder by a penetration type fixing tool. Sectional drawing which shows the stratified panel floor slab bridge which installed the railing near both ends in the direction perpendicular to the bridge axis. The flowchart which shows the flow of the main process of the layered panel deck bridge construction method. The step figure explaining the main process of the layered panel deck bridge construction method.

  An example of an embodiment of a layered panel deck bridge and a layered panel deck bridge construction method of the present invention will be described with reference to the drawings. The method of constructing a layered panel deck bridge of the present invention is a method of constructing a layered panel deck bridge of the present invention. Therefore, the layered panel slab bridge of the present invention will be described first, and then the layered panel slab bridge construction method of the present invention will be described.

1. FIG. 1 is a perspective view showing the basic structure of a layered panel slab bridge 100 of the present invention. As shown in this figure, in the layered panel floor slab bridge 100, a floor slab is formed by a plurality of layered panels 200, and the layered panels 200 are fixed on the upper surface (for example, upper flange) of the main girder 310 or the like. The floor slab of the layered panel floor slab bridge 100 can be formed by fixing a plurality of layered panels 200 arranged in the bridge axis direction on the main girder 310 as shown in FIG. As shown in (1), a plurality of layered panels 200 further divided in the direction perpendicular to the bridge axis can be arranged and formed on the main girder 310. Alternatively, as shown in FIG. 2B, a floor slab of the layered panel slab bridge 100 can be formed by arranging a plurality of layered panels 200 on the horizontal beam 320 (otherwise, horizontal ribs or the like). Hereinafter, the beam supporting the layered panel 200 including the main girder 310 and the vertical girder laid in the bridge axis direction, and the horizontal girder 320 and the horizontal ribs laid in the direction perpendicular to the bridge axis will be referred to as “beam” for convenience. Support beam 300 ". As the support girder 300, a shaped steel such as an H-shaped steel or an I-shaped steel can be used, or a combination of an angle steel or a grooved steel can be used, or other materials other than a square steel pipe or a steel material can be used. You can also.

  FIG. 3 is a sectional view in which the layered panel 200 is separated for each member. As shown in this figure, the layered panel 200 is composed of a relatively lightweight core material (hereinafter, referred to as a “lightweight core material 210”) and a thinner surface material 220. More specifically, the light-weight core material 210 has a laminated structure (a so-called sandwich shape) in which the light-weight core material 210 is sandwiched between the surface materials 220 from both sides (upper and lower surfaces in the drawing). This laminated structure can be formed by vacuum lamination, can be formed by hand lay-up in which fiber sheets are attached one by one, or can be formed by various other methods conventionally used.

  Since the layered panel 200 functions as a member of the floor slab, it is necessary that the layered panel 200 has a considerable strength (rigidity). For this reason, a material having a considerable strength is selected for the lightweight core material 210 and the surface material 220. Good to do. For example, it is conceivable that the shear load-bearing force is applied to the light-weight core material 210 which is thicker than the surface material 220, and the bending load-bearing force is applied to the surface material 220 which is thinner than the light-weight core material 210. It is desirable that one layered panel 200 has a weight (for example, 50 kg / sheet or less, preferably 30 kg / sheet or less) that can be transported and installed by human power. It is better to use a lightweight material.

  As the lightweight core material 210, wood such as balsa and paulownia can be used, or honeycomb material such as aluminum alloy, fiber reinforced plastic (FRP: Fiber Reinforced Plastics), ceramic, paper, urethane foam, PVC foam, styrofoam A foamed plastic material made of a foam can be used. Among them, the balsa material is a lightweight material having a specific gravity of about 0.15, and is excellent in compression and shear strength. In other words, it is easy to handle and has high strength. It is. Balsa wood having a nominal average specific gravity of 0.148, or 0.109 or 0.285 is provided on the market, and if these are adopted, the quality is ensured, and it is more preferable because it can be easily obtained. Becomes On the other hand, wood is low in cost and easily available, so that it may be the most suitable material for the lightweight core 210 depending on the construction site, budget, and the like.

  As one surface material 220, a synthetic resin or FRP can be used. Among them, glass fiber reinforced plastic (GFRP: Glass Fiber Reinforced Plastic) is a material that is suitable for use as the surface material 220 because it is lightweight and has excellent bending load resistance. When GFRP is used as the surface material 220, the layered panel 200 is preferably arranged on the support beam 300 so that the glass fiber can oppose the bending moment generated in the layered panel 200. For example, when the main girder 310 or the space between the girder laid in the bridge axis direction (that is, the direction perpendicular to the bridge axis) becomes the target span of the bending moment, the layered panel 200 is arranged so that the glass fibers are arranged in the direction perpendicular to the bridge axis. When the spans 320 and the horizontal ribs laid in the direction perpendicular to the bridge axis and the span between the horizontal ribs (ie, the bridge axis direction) are the target span of the bending moment, the layered panel 200 is arranged so that the glass fibers are arranged in the bridge axis direction. It is good to arrange. Note that the dimensions of one layered panel 200 (for example, a layered panel 200 using balsa material as the lightweight core material 210 and GFRP as the surface material 220) have a plane dimension of about 600 mm × 2000 mm in order to enable human handling. The thickness is preferably 100 mm or less. Therefore, it is desirable that the thickness of the surface material 220 be about several mm, and for example, it is preferable to design the thickness to be not less than 3 mm and not more than 4 mm. The inventors of the present application have confirmed that when the thickness of the layered panel 200 is 59 mm or more, the intended strength is easily exhibited, and when the thickness is 93 mm or less, the handling of the layered panel 200 is extremely easy.

  The surface member 220 is thinner than the lightweight core member 210 as described above, and is a sheet-like, thin-plate-like, or film-like member. When the layered panel 200 is installed as a floor slab of the layered panel slab bridge 100, the surface material 220 becomes a road surface on which people, bicycles, and automobiles pass. Therefore, the surface material 220 is preferably subjected to a non-slip processing (non-slip processing). Further, a process for preventing deterioration by ultraviolet rays, such as applying a gel coat to the surface material 220, can also be performed. By performing the non-slip processing and the UV deterioration prevention processing, it is not necessary to newly lay a pavement on the floor slab of the layered panel slab bridge 100, and the installation of the layered panel 200 is sufficient. Further, the surface material 220 can be provided with a desired color or pattern, that is, a variety of road surfaces can be formed.

  Various processes conventionally used, such as embossing, can be employed for the non-slip process of the surface material 220. For example, in FIG. 4, the entire surface of the surface material 220 is embossed, and a plurality of “projections” are provided to prevent slippage. In this figure, the protrusions are provided only in one direction. However, the protrusions may be provided in two directions (a lattice shape or an X-shape), or the "concave portions" may be provided instead of (or in addition to) the protrusions. Can also be provided. Further, the anti-slip processing can be performed only on the surface material 220 on one side of the layered panel 200 or can be performed on the surface material 220 on both sides. The processing cost can be reduced if the anti-slip processing is performed only on one side, and the anti-slip processing can be performed on both sides, so that the layered panel 200 can be installed without making a mistake in the front and back.

  Since the layered panel 200 is lightweight, it is preferable that the layered panel 200 be firmly fixed to the support girder 300 so as not to be scattered by wind or the like, and may be fixed using, for example, an adhesive. Specifically, the layered panel 200 is placed on the adhesive applied to the upper surface (for example, the upper flange surface) of the support girder 300 and cured for a specified period to bond and fix the layered panel 200 to the support girder 300. I do. At this time, it is desirable that the adhesive to be applied has a high viscosity, and for example, an epoxy resin-based adhesive can be used.

  The layered panel 200 can be fixed to the support beam 300 by using a fixing tool 400 in addition to (or instead of) the adhesive fixing. FIG. 5 is a partial cross-sectional view in which the layered panel 200 is fixed to the support girder 300 by the double flange type fixing device 400. The double-flange type fixing device 400 includes an upper flange 410, a lower flange 420, and a connecting rod 430, and has a structure in which the upper flange 410 and the lower flange 420 are connected by the connecting rod 430. In order to fix the layered panel 200 to the support girder 300 by the double flange type fixing device 400, as shown in FIG. 5, a part of the layered panel 200 and the support girder 300 are sandwiched between the upper flange 410 and the lower flange 420. More specifically, after the connecting rod 430 penetrates the layered panel 200 in the thickness direction, the interval between the upper flange 410 and the lower flange 420 is reduced using a screw or the like, and the layered panel 200 is moved upward by the upper flange 410. , And a part of the support girder 300 (in this case, the upper flange of the support girder 300) is pushed up from below by the lower flange 420, thereby sandwiching the layered panel 200 and a part of the support girder 300. At this time, since a balsa material, wood, or the like is used as the lightweight core 210, a through hole for the connecting rod 430 can be provided extremely easily as compared with a steel plate or the like.

  It can also be fixed to the support girder 300 using a penetration type fixing device 400 in addition to the double flange type fixing device 400. FIG. 6 is a partial cross-sectional view in which the layered panel 200 is fixed to the support beam 300 by a penetrating fixing device 400. The penetrating fixture 400 includes a penetrating body 440, a lower flange 420, and a connecting rod 430, and has a structure in which the penetrating body 440 and the lower flange 420 are connected by the connecting rod 430. In order to fix the layered panel 200 to the support girder 300 by the penetrating fixing device 400, as shown in FIG. 6, a part of the layered panel 200 and the support girder 300 are sandwiched between the penetrator 440 and the lower flange 420. More specifically, after penetrating the penetrating body 440 into the layered panel 200, the distance between the penetrating body 440 and the lower flange 420 is reduced by using a screw or the like, and the penetrating body 440 is interposed through the layered panel 200 inside. The lower part of the support girder 300 (in this case, the upper flange of the support girder 300) is pushed up from below by the lower flange 420, thereby clamping the layered panel 200 and a part of the support girder 300. . At this time, since the balsa material, wood, or the like is used as the lightweight core material 210, the penetrator 440 can penetrate the layered panel 200 extremely easily as compared with a steel plate or the like.

  FIG. 7 is a cross-sectional view showing the layered panel deck slab bridge 100 on which the railing 500 is installed. This railing 500 is composed of pillars 510 that are arranged at intervals in the bridge axis direction over substantially the entire bridge length, and fences attached so as to connect the pillars 510 to each other. In addition, in order to reduce the weight, the row 500 may be made of, for example, aluminum. As shown in this figure, the railing 500 is installed on the upper surface of the layered panel 200 near both ends in the direction perpendicular to the bridge axis (width direction). More specifically, the bolt 520 is inserted into a bolt hole provided at the end of the layered panel 200, and the base plate fixed to the bottom of the column 510 and the layered panel 200 are sewn with the bolt 520 to form the layered column 510. The railing 500 is constructed by fixing to the panel 200 and attaching a fence between the columns 510. At this time, since a balsa material, wood, or the like is used as the lightweight core material 210, bolt holes can be provided in the layered panel 200 extremely easily as compared with a steel plate or the like.

2. Next, a method for constructing a layered panel slab bridge of the present invention will be described. The method of constructing a layered panel slab bridge of the present invention is a method of constructing the layered panel slab bridge 100 described above. Therefore, the description overlapping with the content described for the layered panel slab bridge 100 will be avoided. Only the contents specific to the method for constructing a layered panel deck bridge of the present invention will be described. That is, the contents not described here are the same as those described in “1.

  FIG. 8 is a flow chart showing the flow of the main steps of the method for constructing a layered panel slab bridge, and FIG. 9 is a step diagram for explaining the main steps shown in this flow chart. Hereinafter, main steps of the method for constructing a layered panel deck bridge will be described with reference to FIGS. 8 and 9.

  As shown in FIG. 8, first, the planned layered panels 200 are provisionally arranged on the support girders 300, and the positions where the respective layered panels 200 are arranged are checked, such as by marking out (marking) (Step 10). Alternatively, by using the dimensions of the layered panel 200 measured in advance, it is also possible to omit the temporary arrangement and perform the blackout. When the arrangement position of the layered panel 200 can be confirmed, if the temporary arrangement is performed, the layered panel 200 is once removed, and an adhesive is applied onto the support beam 300 (Step 20). At this time, an adhesive can be directly applied on the support girder 300, or as shown in FIG. 9A, a mold FW (for example, sponge packing or the like) is installed on both ends of the support girder 300. It is also possible to apply a highly viscous adhesive AD (for example, an epoxy resin-based adhesive) into the mold FW. The formwork FW shown in FIG. 9A has a considerable length in the bridge axis direction (the depth direction in the figure).

  When the adhesive AD is applied on the support beam 300, as shown in FIG. 9B, the layered panel 200 is installed at the position confirmed in the temporary arrangement step (Step 10) (Step 30). At this time, the layered panel 200 may be pressed from above so that the adhesive AD sufficiently contacts the lower surface of the layered panel 200. When the formwork FW is installed, when the adhesive AD leaks from the gap between the formwork FW provided in the bridge axis direction and the formwork FW, the adhesive AD sufficiently contacts the layered panel 200. Can be determined. In FIG. 9B, the adhesive AD is applied only to the support girders 300 on both sides of the three support girders 300, but the adhesive AD is applied only to a part of the support girders 300 as described above. The adhesive AD can be applied to all the support girders 300.

  When the layered panel 200 is set on the support beam 300, the layered panel 200 is temporarily fixed to the support beam 300 by the fixture 400 as shown in FIG. 9C (Step 40). For example, when using the double-flange type fixing device 400, the connecting rod 430 penetrates the layered panel 200, and the upper flange 410 and the lower flange 420 are separated by using a screw or the like to reduce the interval between the upper flange 410 and the lower flange 420. The layered panel 200 and a part of the support girder 300 are sandwiched by the lower flange 420, thereby temporarily fixing the layered panel 200 to the support girder 300. In the case where the penetrating fixture 400 is used, the penetrating body 440 is fixed in the layered panel 200, and the gap between the penetrating body 440 and the lower flange 420 is reduced by using a screw or the like, so that the penetrating body 440 and the lower part are separated. The layered panel 200 and a part of the support girder 300 are sandwiched between the flanges 420, thereby temporarily fixing the layered panel 200 to the support girder 300. When the layered panel 200 is temporarily fixed to the support girder 300 by the fixing tool 400, the bonding portion between the layered panel 200 and the support girder 300 is cured in this state for a predetermined period. In the case where the layered panel 200 is not liable to be scattered by the wind or the like during the curing period, the bonded portion can be cured without temporarily fixing the layered panel 200 to the support beam 300 by the fixing tool 400.

  When the bonding portion is cured until the layered panel 200 and the support beam 300 are sufficiently bonded and fixed, the row 500 is set on the layered panel 200 (Step 60). When temporarily fixed by the fixing device 400, the fixing device 400 may be removed before installing the row 500 (Step 50). As shown in FIG. 9D, the bolt 520 is inserted into a bolt hole at the end of the layered panel 200, and the base plate and the layered panel 200 at the bottom of the column 510 are sewn with the bolt 520, thereby attaching the column 510 to the layered panel 200. The railing 500 is installed on the layered panel 200 by fixing and attaching a fence member between the columns 510.

  The layered panel slab bridge of the present invention and the method of building a layered panel slab bridge can be used for various road bridges such as a human road bridge, a bridge for bicycles, a bridge for automobiles, and also in a construction work of a new bridge. It can be used for floor slab replacement work. According to the invention of the present application, it is possible to efficiently replace the floor slab of a road bridge in operation, and in view of extending the life of the road bridge, it is not only industrially usable but also socially significant. This is an invention that can be expected to contribute.

REFERENCE SIGNS LIST 100 laminar panel slab bridge 200 laminar panel (for laminar panel slab bridge) 210 lightweight core (for laminar panel) 220 facing material (for laminar panel slab) 300 support girder (for laminar panel slab bridge) 310 (lamellar panel floor) Main girder (of slab bridge) 320 Cross beam (of slab panel deck) 400 Fixture (of slab panel bridge) 410 Upper flange (of fixture) Lower flange 430 (of fixture) 430 (of fixture) Connecting rod 440 Penetration body (of fixture) 500 Rail (of floor panel slab) Rail 510 (rail) Prop 520 (rail) Bolt AD adhesive FW Formwork

Claims (15)

A bridge that uses multiple layered panels for the floor slab,
The layered panel has a core material and a surface material thinner than the core material, and has a structure in which the surface material is laminated on both surfaces of the core material,
The floor slab is formed by laying a plurality of the layered panels and fixing the layered panels on a support beam.
A layered panel deck bridge characterized by the following: Using a bolt hole provided at the end of the layered panel, a railing was bolted to the layered panel,
The bridge according to claim 1, characterized in that: Non-slip processing was applied to the surface material of the layered panel,
The layered panel slab bridge according to claim 1 or 2, wherein: The layered panel is fixed to the support beam by a fixture,
The fixing device includes an upper flange, a lower flange, and a connecting rod, and the upper flange and the lower flange are connected by the connecting rod,
The connecting rod penetrates the layered panel, and the upper panel and the lower flange sandwich a part of the layered panel and the support beam, whereby the layered panel is fixed to the support beam.
The layered panel slab bridge according to any one of claims 1 to 3, wherein: The layered panel is fixed to the support beam by a fixture,
The fixing tool includes a penetrator, a lower flange, and a connecting rod, and the penetrator and the lower flange are connected by the connecting rod,
The penetrating body is fixed in the layered panel, and the layered panel and a part of the supporting girder are sandwiched by the penetrating body and the lower flange, whereby the layered panel is fixed to the supporting girder.
The layered panel slab bridge according to any one of claims 1 to 3, wherein: The core material of the layered panel is a balsa material,
The layered panel slab bridge according to any one of claims 1 to 5, characterized in that: The surface material of the layered panel is FRP, and the core material of the layered panel is wood.
The layered panel deck bridge according to any one of claims 1 to 6, wherein: The surface material of the layered panel is GFRP containing glass fibers,
The layered panel was laid on the support girder so that the arrangement direction of the glass fibers was perpendicular to the bridge axis,
The layered panel slab bridge according to any one of claims 1 to 7, wherein: The surface material of the layered panel is GFRP containing glass fibers,
The layered panel was laid on the support girder so that the glass fiber arrangement direction was the bridge axis direction,
The layered panel slab bridge according to any one of claims 1 to 7, wherein: The weight of the layered panel is 50 kg or less;
The layered panel deck bridge according to any one of claims 1 to 9, wherein: The thickness of the layered panel is 59 mm or more and 93 mm or less,
The layered panel slab bridge according to any one of claims 1 to 10, wherein: The thickness of the surface material is 3 mm or more and 4 mm or less,
The layered panel slab bridge according to any one of claims 1 to 11, wherein: A method of constructing a bridge using layered panels on a floor slab,
The layered panel has a core material and a surface material thinner than the core material, and has a structure in which the surface material is laminated on both surfaces of the core material, and the surface material is subjected to a non-slip process,
An adhesive application step of applying an adhesive on the support girder,
A floor slab installation step of forming a floor slab by laying a plurality of the layered panels in the bridge axis direction by human power;
Using a bolt hole provided at an end of the layered panel, a railing installation step of bolting a railing to the layered panel,
A method for constructing a layered panel slab bridge, comprising: After the floor slab setting step, the layered panel is temporarily fixed to the support girder by a fixture having an upper flange, a lower flange, and a connecting rod, and the upper flange and the lower flange being connected by the connecting rod. Temporary fixing process,
After curing of the bonding portion, a fixture releasing step of removing the fixture, further comprising:
In the temporary fixing step, the connecting rod is penetrated into the layered panel, and the layered panel and a part of the support beam are sandwiched by the upper flange and the lower flange. Temporarily fixed,
The method for constructing a layered panel slab bridge according to claim 13, wherein: After the floor slab setting step, the laminar panel is temporarily fixed to the support girder by a fixing tool including a penetrating body, a lower flange, and a connecting rod, and the penetrating body and the lower flange are connected by the connecting rod. Temporary fixing process,
After curing of the bonding portion, a fixture releasing step of removing the fixture, further comprising:
In the temporary fixing step, the penetrating body is fixed in the layered panel, and the penetrating body and the lower flange sandwich a part of the layered panel and the support girder, thereby attaching the layered panel to the support girder. Temporarily fixed to the
The method for constructing a layered panel slab bridge according to claim 13, wherein:

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