JP7129168B2 - Bridge reinforcement structure and method - Google Patents

Description

The present disclosure relates to a bridge reinforcement structure and method.

Conventionally, in bridges made of steel girder members such as railway bridges, steel plates called buckle plates are attached to the upper surfaces of horizontal girders and longitudinal girders, and ballast and sleepers are arranged on top of them. ing. In such bridges, cracks and deformations may occur in the buckle plates at the attachment points to the cross beams and vertical girders and other places due to the long-term load.

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

JP 2003-268718 A

However, the conventional technology described above is difficult to construct, costs a lot, and requires large-scale construction work, so it cannot necessarily be applied to all bridges. In addition, due to the reinforcing steel plates and support members provided on the lower surface of the buckle plate, it was not easy to visually check the condition of each member, as well as the parts attached to the vertical and horizontal girders, where cracks and deformation are likely to occur.

Here, it is possible to solve the problems of the above-mentioned conventional technology, reinforce the bridge so as to impart sufficient strength for practical use while having a simple structure, reduce the cost, and also reduce the cost of each member and cracks. To provide a bridge reinforcement structure and method that facilitates visual confirmation of attachment portions to longitudinal girders and transverse girders where deformation is likely to occur.

To that end, in a bridge reinforcement structure, a bridge reinforcement structure having girder members including longitudinal and transverse girders and buckle plates attached to upper surfaces of the girder members, the perimeter being defined by the girder members A reinforcing support member is provided in the central space of the girder member and attached to the girder member, the reinforcing support member is positioned inside the central space of the girder member and has a parallel cross shape in plan view. A reinforcing member central space, which is smaller than the girder member central space and has a similar shape to the buckle plate in plan view, is formed by the reinforcing support member. The portions of the longitudinal and transverse reinforcing members defined within and defining the perimeter of the reinforcing member central space support the buckle plate from below.

In another bridge reinforcement structure, the buckle plate is also attached to the longitudinal and transverse beams at the portions defining the perimeter of the central space of the beam members, and the longitudinal reinforcing members are spaced apart from the longitudinal beams. Positioned inside the beam member central space, the transverse reinforcing member is positioned inside the beam member central space and spaced apart from the transverse beam.

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

In still another bridge reinforcement structure, the cushioning material further includes a bag and a filler filled inside the bag.

A method of reinforcing a bridge is a method of reinforcing a bridge having girder members including vertical girders and transverse girders and buckle plates attached to the upper surfaces of the girder members, which are combined so as to form a grid in plan view. a reinforcing support defining a reinforcing member central space similar in shape to the buckle plate in plan view and smaller than the girder member central space defined around by the girder member; A member is disposed within and attached to the spar member central space, and the buckle plate is supported from below by portions of the longitudinal and transverse reinforcing members defining the perimeter of the spar central space.

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

Advantageous Effects of Invention According to the present disclosure, it is possible to reinforce a bridge so as to impart sufficient strength for practical use while having a simple configuration, and to reduce costs.

It is a partial cross-sectional perspective view which shows the schematic structure of the bridge in this Embodiment. FIG. 2 is a cross-sectional view showing a reinforcing structure for a bridge in this embodiment; 3A and 3B are three-view diagrams showing the main part of the reinforcement structure of the bridge according to the present embodiment; FIG. FIG. 2 is a first perspective view showing a main part of the reinforcement structure of the bridge according to the present embodiment; FIG. 4 is a second perspective view showing a main part of the reinforcement structure of the bridge according to the present embodiment;

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

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

In FIG. 1, reference numeral 1 denotes a bridge according to the present embodiment, which includes a main girder 11, a horizontal girder 12, and a vertical girder 13, which are long steel members. The bridge 1 may be for railways, for roads, or for any other purpose. . Buckle plates 15 made of steel plates are attached to the upper surfaces of the horizontal girders 12 and the vertical girders 13, and a ballast track bed 31 made of ballast such as crushed stone is formed thereon. It is assumed that rails 32 are arranged side by side, and two rails 33 are laid on the sleepers 32 . The main girder 11 extends parallel to the direction in which the rail 33 extends, the transverse girder 12 extends in a direction orthogonal to the main girder 11, and the longitudinal girder 13 extends parallel to the main girder 11. It shall be.

In the present embodiment, expressions indicating directions such as up, down, left, right, front, and back used to describe the configuration and operation of each part of the bridge 1 and other members are absolute. It is not a thing but a relative one, and it is appropriate when each part of the bridge 1 and other members are in the posture shown in the figure, but if the posture changes, it can be changed according to the change in posture. should be interpreted.

As shown in FIGS. 3-5, the bridge 1 may be provided with cross-struts 14 . The horizontal struts 14 are long steel members that extend parallel to the horizontal beams 12, and are appropriately arranged at locations where the span of the horizontal beams 12 (interval between adjacent horizontal beams 12) is wide. . That is, the cross member 14 functions as an auxiliary member for the cross beam 12 or as a kind of cross beam 12 . Note that the horizontal support member 14 is not necessarily a necessary member and can be omitted.

In the present embodiment, the upper surfaces of the horizontal beams 12, the vertical beams 13 and the horizontal beams 14 are substantially flush, and the four sides of the buckle plate 15, which has a substantially rectangular shape in plan view, are the central space 17 of the beam member. It is attached by fixing means such as welding, bolts, rivets, etc. to the upper surface of the cross beams 12, vertical beams 13 or cross beams 14 that define the perimeter. That is, the horizontal beams 12 , vertical beams 13 and horizontal struts 14 function as beam members that support the four sides of the buckle plate 15 . The buckle plate 15 functions as a plate member that closes the upper surface of a rectangular beam member central space 17 of a rectangular lattice in a plan view whose four sides are defined by the beam member. At the center of the buckle plate 15, there is formed a drain port 15a penetrating through the buckle plate 15 in the plate thickness direction.

Since the buckle plate 15 shown on the right side in FIG. Cracks and deformations may occur in the longitudinal beams 13 or the parts attached to the horizontal struts 14 or the like. Therefore, in this embodiment, like the buckle plate 15 shown on the left side in FIG.

In the reinforcing structure, as shown in FIGS. 3 to 5, a reinforcing support member 20 attached to the beam member supports the buckle plate 15 from below in the beam member central space 17. As shown in FIG. Specifically, the reinforcing support member 20 includes a vertical reinforcing member 22 and a horizontal reinforcing member 21 which are columnar steel materials, and the pair of vertical reinforcing members 22 and the pair of horizontal reinforcing members 21 have a grid shape in plan view. are combined in such a way that In the drawing, an example in which the vertical reinforcing member 22 and the horizontal reinforcing member 21 are H-section steel, which is a type of steel material, is shown, but the steel material does not necessarily have to be H-section steel. It may be an I-shaped steel, a channel steel, an angle steel, a 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 equivalent to the span of the stringer 13 (the interval between the adjacent stringers 13). As shown in FIG. 3, a pair of longitudinal reinforcing members 22 arranged to extend parallel to the vertical beams 13 are connected at both ends to a pair of horizontal reinforcing members 21 extending parallel to the horizontal beams 12. It is attached to each side surface of each by fixing means such as welding, bolts, rivets, etc. via auxiliary members such as brackets. As a result, it is possible to obtain the reinforcing support member 20 having a grid shape 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, and the central space of the reinforcing member is defined by the pair of vertical reinforcing members 22 and the pair of horizontal reinforcing members 21. 20a is a rectangular space in plan view similar to the central space 17 of the beam member. Both ends of a pair of horizontal reinforcing members 21 extending parallel to the horizontal beams 12 are attached to the side surfaces of the vertical beams 13 via auxiliary members such as brackets by fixing means such as welding, bolts and rivets.

In this state, the horizontal reinforcing members 21 are separated from the horizontal beams 12 and positioned inside the beam member central space 17, and the vertical reinforcing members 22 are separated from the longitudinal beams 13 and positioned inside the beam member central space 17. Located in The position of the center of the reinforcement member central space 20a, which is smaller than the beam member central space 17, in a plan view is equivalent to the center of the beam member central space 17 and the position of the drain port 15a.

The reinforcing support member 20 is introduced into the girder member central space 17 from below the bridge 1 and attached to the girder member that supports the four sides of the buckle plate 15 . In this case, after introducing the reinforcing support member 20 in which the vertical reinforcing member 22 and the horizontal reinforcing member 21 are combined in advance so as to form a grid pattern into the central space 17 of the girder member, both ends of the pair of horizontal reinforcing members 21 are vertically attached. Alternatively, after introducing a pair of horizontal reinforcing members 21 into the central space 17 of the girder member and attaching both ends thereof to the side surfaces of the longitudinal girder 13, the pair of longitudinal reinforcing members 22 are attached at both ends. It is also possible to attach them to the side surfaces of the lateral reinforcing members 21 and combine them so as to form a grid pattern. Therefore, the reinforcing support member 20 can be attached to the girder member without removing the buckle plate 15 or removing the ballast bed 31, the sleeper 32, the rail 33, etc. on the buckle plate 15. There is no need to stop the operation of passing vehicles.

In addition, when the reinforcing support member 20 is attached to the beam member, the upper surface of the portion of the reinforcing support member 20 defining the periphery of the reinforcing member central space 20a, that is, the reinforcing member center of the vertical reinforcing member 22 and the horizontal 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 cushioning material 25 is interposed between the upper surface of the vertical reinforcing member 22 and the horizontal reinforcing member 21 and the lower surface of the buckle plate 15 . Although the cushioning material 25 may be any kind of member, here, as shown in FIG. 4, a filler such as CA mortar (cement asphalt mortar) is placed inside an elongated bag made of nonwoven fabric or the like. will be described as being a member filled with . The cushioning members 25 abut on the lower surface of the buckle plate 15 while being placed on the upper surface of each of the vertical reinforcing members 22 and the horizontal reinforcing members 21 . Also, since the cushioning material 25 has flexibility, its upper surface has a shape corresponding to the shape of the lower surface of the buckle plate 15 . 5 shows the reinforcing support member 20 with the cushioning material 25 removed.

The cushioning material 25 has a shape as shown in FIG. They are interposed between the upper surface of the vertical reinforcing member 22 and the horizontal reinforcing member 21 and the lower surface of the buckle plate 15 . As a result, even if the distance between the upper surface of the vertical reinforcing member 22 and the horizontal reinforcing member 21 and the lower surface of the buckle plate 15 is not constant and varies, the buckle plate 15 is supported by the vertical reinforcing member 22 via the cushioning material 25 . and are reliably supported by the lateral reinforcing members 21 . Therefore, when the reinforcing support member 20 is attached to the beam member, even if there is an error in the attachment position in the vertical direction, the cushioning material 25 intervenes to reliably support and reinforce the buckle plate 15. can.

Thus, in this embodiment, the reinforcing structure of the bridge 1 having the girder members including the longitudinal girder 13 and the transverse girder 12 and the buckle plate 15 attached to the upper surface of the girder member is defined by the girder member. A reinforcing support member 20 disposed within the crossed beam member central space 17 and attached to the beam member, the reinforcing support member 20 comprising a longitudinal reinforcing member 22 and a transverse reinforcing member located inside the beam member central space 17. 21 and smaller than the spar central space 17 is defined within the spar central space 17 by the reinforcing support members 20 around the reinforcing member central space 20a at the longitudinal reinforcing members 22 and the transverse reinforcing members 21. supports the buckle plate 15 from below.

In addition, in this embodiment, the reinforcement method of the bridge 1 having the girder members including the longitudinal girder 13 and the horizontal girder 12 and the buckle plate 15 attached to the upper surface of the girder member consists of the vertical reinforcing member 22 and the horizontal reinforcing member 21 and defining a stiffening member central space 20a that is smaller than the beam member central space 17 defined perimeter by the beam member, disposed within the beam member central space 17 and attached to the beam member; The buckle plate 15 is supported from below by portions of the vertical reinforcing member 22 and the horizontal reinforcing member 21 that define the periphery of the reinforcing member central space 20a.

As a result, the construction is easy, the structure is simple, and the bridge 1 can be reinforced so as to impart sufficient strength for practical use, and the cost can be reduced. Also, even after the bridge 1 is reinforced, the condition of each member such as the buckle plate 15 can be easily confirmed visually from below.

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

Furthermore, the buckle plate 15 is attached to the portion of the stringer 13 and the transverse stringer 12 that defines the periphery of the stringer member central space 17, and the longitudinal reinforcing member 22 is spaced apart from the stringer member 13 and inside the stringer member central space 17. , and the transverse reinforcing member 21 is positioned inside the central space 17 of the beam member, spaced apart from the transverse beam 12 . Therefore, in the buckle plate 15, the state of the attachment portions to the vertical beams 13 and the horizontal beams 12, which are the portions where cracks and deformation are likely to occur, can be easily confirmed visually from below.

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

Furthermore, a cushioning material 25 is interposed between the upper surface of the portion of the vertical reinforcing member 22 and the horizontal reinforcing member 21 defining the periphery of the reinforcing member central space 20 a and the lower surface of the buckle plate 15 . As a result, even if the distance between the upper surface of the vertical reinforcing member 22 and the horizontal reinforcing member 21 and the lower surface of the buckle plate 15 is not constant and varies, the buckle plate 15 is supported by the vertical reinforcing member 22 via the cushioning material 25 . And since it is reliably supported by the lateral reinforcing member 21, the construction for attaching the reinforcing supporting member 20 to the girder member can be easily performed.

It should be noted that this disclosure describes features of preferred exemplary embodiments. Various other embodiments, modifications and variations within the scope and spirit of the claims appended hereto will naturally occur to those skilled in the art upon reviewing the disclosure herein. be.

The present disclosure is applicable to bridge reinforcement structures and methods.

1 Bridge 12 Cross beam 13 Vertical beam 15 Buckle plate 17 Girder member central space 20 Reinforcing support member 20a Reinforcing member central space 21 Lateral reinforcing member 22 Vertical reinforcing member 25 Cushioning material

Claims (7)

A reinforcement structure for a bridge having girder members including stringers and transverse girders and buckle plates attached to upper surfaces of the girder members, comprising:
a reinforcing support member disposed within a spar member central space defined by the spar member and attached to the spar member;
The reinforcing support member is located inside the central space of the beam member and includes a vertical reinforcing member and a horizontal reinforcing member that are combined to form a grid shape in plan view ,
A reinforcing member central space which is smaller than the girder member central space and similar in shape to the buckle plate in plan view is defined in the girder member central space by the reinforcing support member, and the longitudinal reinforcing member and the lateral reinforcing member A reinforcing structure for a bridge, wherein the portion defining the periphery of the reinforcing member central space supports the buckle plate from below. The buckle plate is attached to the portion of the stringer and cross beam that defines the perimeter of the stringer member central space, the longitudinal reinforcing member is spaced from the stringer and positioned inside the stringer member central space, and 2. The bridge reinforcement structure according to claim 1, wherein the lateral reinforcing members are spaced apart from the lateral beams and located inside the beam member central spaces. 3. The bridge reinforcement according to claim 1, further comprising a cushioning material interposed between the upper surface of the portion of the longitudinal reinforcing member and the lateral reinforcing member defining the periphery of the reinforcing member central space and the lower surface of the buckle plate. structure. 4. The bridge reinforcement structure according to claim 3 , wherein the cushioning material includes a bag and a filler filled inside the bag. A method of reinforcing a bridge having girder members including stringers and transverse girders and buckle plates attached to upper surfaces of the girder members, comprising:
It includes a vertical reinforcing member and a horizontal reinforcing member that are combined to form a parallel cross shape in plan view, is smaller than the girder member central space defined by the girder member, and is similar in shape to the buckle plate in plan view. a reinforcing support member defining a reinforcing member central space disposed within said beam member central space and attached to said beam member;
A method of reinforcing a bridge, wherein the buckle plate is supported from below by portions of the longitudinal reinforcing member and the lateral reinforcing member that define the periphery of the central space of the reinforcing member. 6. The method of reinforcing a bridge according to claim 5 , wherein the reinforcing support member is introduced from below into the center space of the girder member and attached to the girder member. 7. The method of reinforcing a bridge according to claim 5 or 6 , wherein a cushioning material is interposed between the upper surface of the portion of the vertical reinforcing member and the horizontal reinforcing member defining the periphery of the reinforcing member central space and the lower surface of the buckle plate. .

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