JP2019127711A - Reinforcement structure and method for bridge - Google Patents

Abstract

To be able to reinforce a bridge to give practically sufficient strength and reduce costs while having a simple configuration, and to be able to facilitate visual confirmation of each member and fitting part for vertical girders and horizontal girders, where cracks and deformation are likely to occur.SOLUTION: A reinforcement structure for a bridge 1 having girder members including a vertical girder 13 and a horizontal girder 12 and a buckle plate 15 attached to the upper surface of the girder members, includes a reinforcement support member disposed in a girder member central space 17 of which the periphery is bounded by the girder member and attached to the girder member. The reinforcement support member includes a vertical reinforcement member and a horizontal reinforcement member located inside the girder member central space 17. A reinforcement member central space smaller than the girder member central space 17 is bounded by the reinforcement support member in the girder member central space 17. A part that bounds the periphery of the reinforcement member central space in the vertical reinforcement member and the horizontal reinforcement member supports the buckle plate 15 from below.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to bridge reinforcement structures and methods.

  Conventionally, in a bridge made of steel girder members like a railway bridge, a steel plate called a buckle plate is attached to the upper surface of the cross girder and the girder, and further, a ballast or a sleeper is disposed thereon ing. In such a bridge, when a load is applied over a long period of time, a crack or deformation may occur in the buckle plate at a portion attached to the cross beam and the vertical beam or other portions.

  Therefore, a reinforcing steel plate and a support member are installed on the lower surface of the buckle plate, and further, a reinforcing method for filling mortar between the buckle plate and the reinforcing steel plate, and a reinforcement longitudinal girder that embraces a sleeper There has been proposed a reinforcing method to be installed on the upper surface (see, for example, Patent Document 1).

JP 2003-268718 A

  However, the conventional technique is difficult to construct, is expensive, and requires a large-scale construction, and thus cannot be applied to all bridges. Further, the reinforcing steel plate and the supporting member provided on the lower surface of the buckle plate have made it difficult to visually check the state of each member, as well as the state of attachment portions to the vertical and horizontal girders where cracks and deformation are likely to occur.

  Here, it is possible to solve the problems of the conventional technology, reinforce the bridge so as to give practically sufficient strength while having a simple configuration, reduce costs, and reduce each member and crack. It is an object of the present invention to provide a reinforcing structure and method of a bridge which can facilitate visual confirmation of a mounting portion on a longitudinal girder and a horizontal girder susceptible to deformation or deformation.

  To that end, in a reinforcement structure of a bridge, the reinforcement structure of a bridge having a girder member including a girder and a transverse girder, and a buckle plate attached to the upper surface of the girder member, the perimeter is defined by the girder member A reinforcing support member disposed in the central space of the spar member and attached to the spar member, the reinforcing support member including a longitudinal reinforcing member and a lateral reinforcing member located inside the central space of the spar member A reinforcing member central space smaller than the girder member central space is defined in the girder member central space by the reinforcing support member, and a portion defining the periphery of the reinforcing member central space in the vertical reinforcing member and the lateral reinforcing member is The buckle plate is supported from below.

  In another reinforcing structure of a bridge, the buckle plate is attached to a portion of the stringer and the cross beam that delimits the central space of the beam member, and the vertical reinforcement member is separated from the stringer. The cross reinforcement member is located inside the girder central space, and the transverse reinforcement member is located inside the girder central space apart from the cross girder.

  In still another reinforcing structure of a bridge, the reinforcing member central space is similar to the buckle plate in plan view.

  Furthermore, in the reinforcing structure of another bridge, the longitudinal reinforcing member and the lateral reinforcing member are combined so as to form a parallel cross section in plan view.

  In still another reinforcing structure of a bridge, a cushioning material further interposed between an upper surface of a portion defining the periphery of the central space of the reinforcing member and a lower surface of the buckle plate in the vertical reinforcing member and the horizontal reinforcing member. Prepare.

  In yet another reinforcing structure for a bridge, the cushioning material further includes a bag and a filler filled inside the bag.

  In a method of reinforcing a bridge, a method of reinforcing a bridge having a girder member including a longitudinal girder and a transverse girder and a buckle plate attached to the upper surface of the girder member, the longitudinal reinforcement member and the lateral reinforcement member being included A reinforcing support member that defines a reinforcing member central space smaller than the central member space defined by the spar member is disposed in the central member space and is attached to the spar member, and the longitudinal reinforcing member and The buckle plate is supported from below by a portion of the lateral reinforcing member that defines the periphery of the reinforcing member central space.

  In another reinforcement method of a bridge, the reinforcing support member is further introduced into the central space of the girder member from below and attached to the girder member.

  In another method of reinforcing a bridge, a cushioning material is further interposed between an upper surface of a portion defining the periphery of the central space of the reinforcing member and a lower surface of the buckle plate in the vertical reinforcing member and the horizontal reinforcing member.

  According to the present disclosure, it is possible to reinforce the bridge so as to provide sufficient strength for practical use while having a simple configuration, and to reduce the cost.

It is a fragmentary sectional perspective view which shows the schematic structure of the bridge in this Embodiment. It is a cross-sectional view which shows the reinforcement structure of the bridge in this Embodiment. It is a three-plane figure which shows the principal part of the reinforcement structure of the bridge in this Embodiment. It is a 1st perspective view which shows the principal part of the reinforcement structure of the bridge in this Embodiment. It is a 2nd perspective view which shows the principal part of the reinforcement structure of the bridge in this Embodiment.

  Hereinafter, the present embodiment will be described in detail with reference to the drawings.

  FIG. 1 is a partial cross-sectional perspective view showing a schematic structure of a bridge in the present embodiment, FIG. 2 is a cross-sectional view showing a reinforcing structure of the bridge in the present embodiment, and FIG. 3 is a reinforcing structure of the bridge in the present embodiment. FIG. 4 is a first perspective view showing the main part of the bridge reinforcement structure in the present embodiment, and FIG. 5 is a second view showing the main part of the bridge reinforcement structure in the present embodiment. It is a perspective view. In FIG. 3, (a) is a plan view, (b) is a front view, and (c) is a side view.

  In FIG. 1, 1 is a bridge in this embodiment, and is provided with a main girder 11, a horizontal girder 12, and a longitudinal girder 13 which are long members made of steel. The bridge 1 may be for railroads, roads, or any other purpose, but here it is described as being for railroads for convenience of explanation. . A buckle plate 15 made of a steel plate is attached to the upper surfaces of the cross beam 12 and the vertical beam 13, and a ballast road bed 31 made of ballast such as crushed stone is formed thereon, and a plurality of pillows are formed on the ballast road bed 31. It is assumed that the hooks 32 are arranged side by side, and two rails 33 are laid on the pillow 32. The main beam 11 extends in parallel with the direction in which the rail 33 extends, the horizontal beam 12 extends in a direction orthogonal to the main beam 11, and the vertical beam 13 extends in parallel with the main beam 11. It shall be.

  In the present embodiment, expressions indicating directions such as upper, lower, left, right, front, rear, etc. used for explaining the configuration and operation of each part of the bridge 1 and other members are absolute. It is not a thing but a relative thing and is suitable when each part of bridge 1 and other members are postures shown in the figure, but when the posture changes, change according to the change of posture. It should be interpreted.

  As shown in FIGS. 3 to 5, the bridge 1 may include a lateral support member 14. The horizontal support member 14 is a long steel member extending in parallel with the cross beam 12, and is appropriately disposed in a place where the span of the cross beam 12 (interval between adjacent cross beams 12) is wide. . That is, the horizontal support member 14 functions as an auxiliary member of the cross beam 12 or a kind of cross beam 12. The lateral support member 14 is not necessarily a necessary member, and can be omitted.

  In the present embodiment, the upper surfaces of the horizontal beam 12, the vertical beam 13, and the horizontal support member 14 are substantially flush with each other, and the four sides of the buckle plate 15 having a substantially rectangular shape in plan view are formed in the central space 17 of the beam member central space 17. It is attached to the upper surface of the cross beam 12, the longitudinal beam 13 or the cross support 14 which defines the periphery by fixing means such as welding, bolts, rivets and the like. That is, the horizontal girder 12, the longitudinal girder 13 and the horizontal support 14 function as girder members for supporting the four sides of the buckle plate 15. The buckle plate 15 functions as a plate member that closes the upper surface of the rectangular girder member central space 17 of a rectangular lattice in a plan view in which four sides are defined by the girder member. At the center of the buckle plate 15, a drainage port 15a which penetrates the buckle plate 15 in the thickness direction is formed.

  Since the buckle plate 15 shown on the right side in FIG. 2 is not reinforced at all, as described in the section “Background Art”, a load is applied over a long period of time. Cracks and deformation may occur in the attachment portion to the stringer 13 or the horizontal support member 14. So, in this embodiment, it is reinforced by the reinforcement structure formed in the girder member center space 17 like the buckle plate 15 shown on the left side in FIG.

  In the reinforcing structure, as shown in FIGS. 3 to 5, the reinforcing support member 20 attached to the girder member supports the buckle plate 15 from below in the girder member central space 17. Specifically, the reinforcing support member 20 includes a vertical reinforcing member 22 and a horizontal reinforcing member 21 that are columnar steel materials, and the pair of vertical reinforcing members 22 and the pair of horizontal reinforcing members 21 are in a cross-beam shape in plan view. Combined to be In the drawing, an example in which the vertical reinforcing member 22 and the horizontal reinforcing member 21 are H-shaped steels, which are a kind of steel material, is shown. However, the steel materials are not necessarily H-shaped steel, for example, It may be I-shaped steel, channel steel, angle steel, T-shaped steel or the like.

  The length of the transverse reinforcing member 21 is longer than the length of the longitudinal reinforcing member 22, and is equal to the span of the longitudinal girder 13 (the distance between the adjacent longitudinal girder 13). As shown in FIG. 3, both ends of the pair of longitudinal reinforcing members 22 arranged so as to extend in parallel with the stringer 13 are paired with the pair of lateral reinforcing members 21 extending in parallel with the transverse string 12. It is attached to each side of each by fixing means, such as welding, a bolt, a rivet, etc. via auxiliary members, such as a bracket. Thereby, it is possible to obtain the reinforcing support member 20 in the form of a parallel cross section in plan view. In the reinforcing support member 20, the upper surfaces of the vertical reinforcing member 22 and the horizontal reinforcing member 21 are substantially flush with each other, and the reinforcing member central space defined by the pair of vertical reinforcing members 22 and the pair of horizontal reinforcing members 21. 20 a is a rectangular space similar to the girder member central space 17 in plan view. Then, both ends of the pair of horizontal reinforcing members 21 extending in parallel with the cross beam 12 are attached to the side surfaces of the vertical beam 13 by fixing means such as welding, bolts, and rivets via auxiliary members such as brackets.

  In this state, the lateral reinforcing member 21 is located inside the spar member central space 17 while being separated from the cross beam 12, and the vertical reinforcing member 22 is separated from the longitudinal girder 13 and inside the spar member central space 17. Located in The center position of the reinforcing member central space 20a smaller than the girder member central space 17 in plan view is equivalent to the center of the girder member central space 17 and the position of the drain port 15a.

  The reinforcing support member 20 is introduced from below the bridge 1 into the girder central space 17 and attached to the girder supporting the four sides of the buckle plate 15. In this case, after introducing the reinforcement support member 20 in which the longitudinal reinforcing members 22 and the lateral reinforcing members 21 are combined in advance into a well-girder shape into the girder member central space 17, both ends of the pair of lateral reinforcing members 21 are longitudinal It can be attached to the side surface of the girder 13, or after introducing the pair of lateral reinforcing members 21 into the girder member central space 17 and attaching both ends thereof to the side surfaces of the vertical beam 13, both ends of the pair of vertical reinforcing members 22 are attached. Attached to the side surface of the lateral reinforcing member 21 can be combined so as to form a cross beam. Therefore, since the reinforcement support member 20 can be attached to the girder member without removing the buckle plate 15 or removing the ballast track 31, the sleepers 32, the rails 33, etc. on the buckle plate 15, the bridge 1 can be used. There is no need to stop the operation of passing vehicles.

  Further, in a state where the reinforcing support member 20 is attached to the girder member, the upper surface of the portion that defines the periphery of the reinforcing member central space 20a in the reinforcing support member 20, that is, the reinforcing member center in the vertical reinforcing member 22 and the lateral reinforcing member 21 The upper surface of the portion defining the periphery of the space 20a is located below the lower surface of the buckle plate 15, as shown in FIG. A shock absorbing material 25 intervenes between the upper surfaces of the vertical reinforcing member 22 and the lateral reinforcing member 21 and the lower surface of the buckle plate 15. The cushioning material 25 may be any type of member, but here, as shown in FIG. 4, a filler such as CA mortar (cement asphalt mortar) is provided inside an elongated bag made of nonwoven fabric or the like. It is described as a member filled with The cushioning material 25 abuts on the lower surface of the buckle plate 15 in a state of being placed one by one on the upper surfaces of the vertical reinforcing members 22 and the lateral reinforcing members 21. In addition, since the cushioning material 25 has flexibility, the upper surface thereof has a shape corresponding to the shape of the lower surface of the buckle plate 15. FIG. 5 shows the reinforcing support member 20 with the cushioning material 25 removed.

  The cushioning material 25 has a shape as shown in FIG. 4 by placing an elongated bag on the upper surfaces of the vertical reinforcing member 22 and the horizontal reinforcing member 21 and then filling the bag with a filler. It is in the state of being interposed between the upper surface of the vertical reinforcing member 22 and the lateral reinforcing member 21 and the lower surface of the buckle plate 15. Thereby, even if the space | interval of the upper surface of the vertical reinforcement member 22 and the horizontal reinforcement member 21 and the lower surface of the buckle plate 15 is not constant, and there is dispersion | variation, the buckle plate 15 is interposed in the vertical reinforcement member 22 via the shock absorbing material 25. And is reliably supported by the lateral reinforcing members 21. Therefore, when attaching the reinforcing support member 20 to the girder member, even if the attachment position in the vertical direction includes an error, the buckle plate 15 can be reliably supported and reinforced by interposing the cushioning material 25. it can.

  As described above, in this embodiment, the reinforcing structure of the bridge 1 having the beam member including the vertical beam 13 and the horizontal beam 12 and the buckle plate 15 attached to the upper surface of the beam member is defined by the beam member. The reinforcing support member 20 is disposed in the central space 17 of the spar member and attached to the spar member. The reinforcing support member 20 includes a vertical reinforcing member 22 and a lateral reinforcing member that are located inside the central space 17 of the spar member. A reinforcing member central space 20a that is smaller than the girder member central space 17 is defined in the girder member central space 17 by the reinforcing support member 20, and is surrounded by the vertical reinforcing member 22 and the lateral reinforcing member 21 around the reinforcing member central space 20a. The part which defines the supports the buckle plate 15 from below.

  Moreover, in this Embodiment, the reinforcement method of the bridge 1 which has the girder member containing the vertical girder 13 and the horizontal girder 12, and the buckle plate 15 attached to the upper surface of the girder member is the vertical reinforcing member 22 and the horizontal reinforcing member. A reinforcing support member 20 that defines a reinforcing member central space 20a that is smaller than the spar member central space 17 that is defined by the spar member and is attached to the spar member. The buckle plate 15 is supported from below by a portion of the vertical reinforcing member 22 and the lateral reinforcing member 21 that defines the periphery of the reinforcing member central space 20a.

  As a result, the bridge 1 can be reinforced so as to provide practically sufficient strength while being easy to construct and having a simple configuration, and the cost can be reduced. Also, even after the bridge 1 is reinforced, the state of each member such as the buckle plate 15 can be easily confirmed visually from below.

  Further, the reinforcement support member 20 is introduced from below into the girder member central space 17 and attached to the girder member. Therefore, the reinforcement can be constructed without stopping the operation of the vehicle passing through the bridge 1, so that the workability is improved.

  Further, the buckle plate 15 is attached to a portion defining the periphery of the girder member central space 17 in the vertical beam 13 and the horizontal beam 12, and the vertical reinforcing member 22 is separated from the vertical beam 13 and inside the girder member central space 17. The horizontal reinforcing member 21 is positioned away from the horizontal beam 12 and is located inside the central space 17 of the beam member. Therefore, in the buckle plate 15, it is possible to easily confirm the state of the attachment portion to the vertical girder 13 and the horizontal girder 12 which are easily cracked and deformed from below.

  Further, the reinforcing member central space 20a is similar to the buckle plate 15 in plan view. Therefore, the entire buckle plate 15 can be evenly supported.

  Further, the cushioning material 25 is interposed between the upper surface of the portion defining the periphery of the reinforcing member central space 20 a in the vertical reinforcing member 22 and the horizontal reinforcing member 21 and the lower surface of the buckle plate 15. Thereby, even if the space | interval of the upper surface of the vertical reinforcement member 22 and the horizontal reinforcement member 21 and the lower surface of the buckle plate 15 is not constant, and there is dispersion | variation, the buckle plate 15 is interposed in the vertical reinforcement member 22 via the shock absorbing material 25. And since it is reliably supported by the horizontal reinforcement member 21, the construction which attaches the reinforcement support member 20 to a girder member can be performed easily.

  It should be noted that the disclosure of the present specification describes features related to preferred and exemplary embodiments. Various other embodiments, modifications and variations within the scope of the claims appended hereto and within the purview thereof will naturally occur to those skilled in the art upon reviewing the disclosure of the present specification. is there.

  The present disclosure can be applied to bridge reinforcement structures and methods.

1 Bridge 12 Horizontal Girder 13 Vertical Girder 15 Buckle Plate 17 Girder Member Central Space 20 Reinforcement Support Member 20a Reinforcement Member Central Space 21 Lateral Reinforcement Member 22 Vertical Reinforcement Member 25 Buffer Material

Claims (9)

A bridge reinforcing structure having a girder member including a vertical girder and a horizontal girder, and a buckle plate attached to the upper surface of the girder member,
A reinforcing support member disposed in a central space of the spar member delimited by the spar member and attached to the spar member;
The reinforcing support member includes a vertical reinforcing member and a horizontal reinforcing member positioned inside the girder member central space,
A reinforcing member central space smaller than the girder member central space is defined in the girder member central space by the reinforcing support member, and a portion defining the periphery of the reinforcing member central space in the longitudinal reinforcing member and the lateral reinforcing member is Bridge reinforcement structure characterized by supporting the buckle plate from below.   The buckle plate is attached to a portion of the stringer and the transverse beam that defines the periphery of the central space of the beam member, and the vertical reinforcing member is spaced from the stringer and is located inside the beam member central space, The bridge reinforcement structure according to claim 1, wherein a transverse reinforcing member is located inside the central space of the girder member at a distance from the transverse girder.   The reinforcing structure for a bridge according to claim 1 or 2, wherein the reinforcing member central space is similar to the buckle plate in a plan view.   The bridge reinforcing structure according to any one of claims 1 to 3, wherein the vertical reinforcing member and the horizontal reinforcing member are combined so as to form a cross beam in a plan view.   The shock absorber interposed between the upper surface of the part which demarcates the circumference | surroundings of the said reinforcement member center space in the said vertical reinforcement member and a horizontal reinforcement member, and the lower surface of the said buckle plate in any one of Claims 1-4. Bridge reinforcement structure described.   The reinforcing structure according to claim 5, wherein the shock absorbing material comprises a bag and a filler filled inside the bag. A method of reinforcing a bridge having a girder member including a vertical girder and a cross girder, and a buckle plate attached to the upper surface of the girder member,
A reinforcing support member that includes a longitudinal reinforcing member and a lateral reinforcing member, and that defines a reinforcing member central space smaller than the central space of the spar member defined by the spar member and disposed in the central space of the spar member. Attached to the girder member,
A method of reinforcing a bridge, wherein the buckle plate is supported from below by a portion of the longitudinal reinforcing member and the lateral reinforcing member that defines the periphery of the reinforcing member central space.   The method for reinforcing a bridge according to claim 7, wherein the reinforcing support member is introduced from below into the central space of the girder member and attached to the girder member.   The bridge reinforcement method according to claim 7 or 8, wherein a cushioning material is interposed between an upper surface of a portion of the longitudinal reinforcing member and a lateral reinforcing member that delimits the periphery of the central space of the reinforcing member and a lower surface of the buckle plate. .