JP7664818B2 - Reinforcement member, method for reinforcing structural member, and structure - Google Patents

Description

This disclosure relates to a reinforcing member, a method for reinforcing a structural member, and a structure.

Conventionally, a technology is known in which a filler material made of a material such as foamed resin is filled into a structure supporting a road to reinforce the structure (see, for example, Patent Document 1). In the structure of Patent Document 1, the slope of a mountain is filled with rigid foamed urethane, a roadbed supporting the road is constructed on top of the rigid foamed urethane, and asphalt is laid on top of the roadbed. This type of structure is generally known as a lightweight embankment structure. In recent years, it has also been known to use such lightweight embankment structures to reinforce aging bridges. In a lightweight embankment structure used to reinforce a bridge, the gap between adjacent pillars (abutments and piers) and the area surrounded by the deck are filled with a filler material, and the lower part of the deck is changed to a lightweight embankment structure.

Patent No. 4885039

In the lightweight embankment structure of Patent Document 1, reinforcing frame members are assembled within the filling members, and the frame members extend to the roadbed. This allows the roadbed to be supported not only by the filling members but also by the frame members. Wall members that hold back the filling members are fixed to this frame. However, when reinforcing bridges and the like, it is not necessary to support the roadbed with frame members. For this reason, it is preferable to be able to easily install reinforcing members that can reinforce the lightweight embankment while holding the wall members in place.

The objective of this disclosure is to provide a reinforcing member that is easier to install, a method for reinforcing a structural member, and a structure that uses this reinforcing member.

The reinforcing member according to the present disclosure is a reinforcing member for reinforcing a structural member using a filling member. The reinforcing member includes a wall member that blocks the filling member and a support member that is disposed on the side where the filling member is injected. The support member is disposed at a distance from the structural member.

The method of reinforcing a structural member according to the present disclosure includes an arrangement step of installing multiple support members at a distance from the structural member, and a filling step of filling the gap between the wall member and the structural member with a filling member.

The structure according to the present disclosure comprises a structural member having a support pillar, a support member arranged at a distance from the structural member, a reinforcing member having a wall member supported by the support member, and a filling member filled between the wall member and the support pillar.

With this reinforcing member, the support member that supports the wall member is placed away from the structural member. The filling member is filled into the support member side, burying the filling member. This fixes the support member and the wall member. Because the support member is placed away from the structural member, there is no need to fix the support member to the structural member, and the support member can be easily installed. As a result, it is possible to provide a reinforcing member that can be installed more easily, and a structure that uses this reinforcing member.

This disclosure provides a reinforcing member that is easier to install, a method for reinforcing a structural member, and a structure that uses this reinforcing member.

FIG. 2 is a side view of a structure in accordance with an embodiment of the present disclosure. 2 is a cross-sectional view taken along line AA in FIG. 1 . BB cross-sectional view of FIG. FIG. 2 is a side view of a support member according to an embodiment of the present disclosure. FIG. 2 is a top view of a support member in an embodiment of the present disclosure. 1A to 1C are cross-sectional views illustrating a procedure for reinforcing a structure in an embodiment of the present disclosure.

Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In Fig. 1, the right side of the paper in the arrangement direction of the pillars 8 is referred to as the front, and the left side of the paper is referred to as the rear. Similarly, in Fig. 3, the upper side of the paper in the arrangement direction of the pillars 8 is referred to as the front, and the lower side of the paper is referred to as the rear.
(1) Overall structure

As shown in Figs. 1 to 3, the structure 1 has a structural member 2, a reinforcing member 4, and a filling member 6. The structural member 2 has abutments 7, columns 8, and floor members 10 supported by the abutments 7 and columns 8. In this embodiment, the structural member 2 is a bridge with a continuous girder structure having a plurality of columns 8 and a floor slab (an example of a floor member 10). The bridge with a continuous girder structure in this embodiment has two abutments (an example of abutments 7) 7a at both ends and two piers (an example of columns 8) 8a between the two abutments 7a when viewed in the arrangement direction of the columns 8 (the front-rear direction in Fig. 1). The number of piers 8a may be one or more. The abutments 7a and the piers 8a are formed of reinforced concrete or the like. The floor members 10 are formed by pouring concrete. However, the materials of the abutments 7, the columns 8, and the floor members 10 may be any material used for such a structural member 2.

The reinforcing member 4 has a support member 12, a wall member 14, and a connecting member 16. The reinforcing member 4 is a member for injecting a filling member 6 around the support columns 8, changing the structure below the floor member 10 to a lightweight embankment, and reinforcing the structural member 2. The reinforcing members 4 are arranged on either side of the support columns 8 along the alignment direction of the support columns 8.

The filling member 6 fills the space surrounded by the wall member 14 and the floor member 10. In this embodiment, the filling member 6 is rigid urethane foam. However, the filling member 6 may be other lightweight embankment materials such as mortar or polystyrene foam. In this embodiment, the filling member 6 is filled between the bottom of the floor member 10 from the front abutment 7a to the rear abutment 7a and the ground W. In the two piers 8a, the filling member 6 wraps around the entire periphery of the pier 8a and is filled so that the filling member 6 is in close contact with the periphery of the pier 8a.

4 and 5, the support member 12 is disposed on the side where the filling member 6 is filled, and is a member that supports the wall member 14. In this embodiment, the support member 12 of the reinforcing member 4 on the left side of FIG. 2 will be described. The support member 12 on the right side is symmetrical to the support member 12 on the left side, so its description will be omitted. The support member 12 is disposed away from the structural member 2. In this embodiment, the support member 12 is disposed away from the pier 8a and the floor member 10. The support member 12 is formed by combining a cylindrical iron pipe 12a extending in the vertical direction and an iron pipe 12b that connects the multiple iron pipes 12a extending in the vertical direction and extends in the horizontal direction. However, the material of the support member 12 may be a material different from the iron pipe. The iron pipe 12a extending in the vertical direction is fixed to the ground W. The ground W may be foundation concrete that holds the support column 8.

As shown in FIG. 3, the support members 12 are arranged in a row in the direction of the arrangement of the columns 8 on the side where the filling member 6 is filled. Therefore, after the filling member 6 is filled, the support members 12 are buried in the filling member.

4 and 5, the wall member 14 is a member that blocks the filling member 6. The wall member 14 is disposed apart from the support 8 and erected between the floor member 10 and the ground W. The wall member 14 is fixed by a connecting member 14a extending from the support member 12. In this embodiment, the connecting member 14a is a metal rod-shaped member (fully threaded bolt) that is fixed to the wall member 14 and has a screw groove formed around its entire circumference. The connecting member 14a is fixed to the iron pipe 12a extending in the vertical direction. Specifically, a flange and a nut are provided on the metal fitting 14b that sandwiches the iron pipe 12a extending in the vertical direction, and the screw groove of the rod-shaped member is coupled to the groove of the nut, thereby fixing the connecting member 14a to the iron pipe 12a. The connecting member 14a may be provided with an adjuster that adjusts the left-right distance between the support member 12 and the wall member 14. In this embodiment, the distance between the wall member 14 and the metal fitting 14b can be adjusted by rotating the rod-shaped member. This allows the distance between the support member 12 and the wall member 14 in the left-right direction to be adjusted.

The wall member 14 may be divided into multiple pieces in the vertical direction and in the direction of the arrangement of the columns 8. The wall member 14 is formed from a resin plate, an iron plate, or the like. After the filling member 6 is filled, the wall member 14 remains as part of the structure 1 together with the support member 12. Therefore, the surface of the wall member 14 opposite the support member 12 functions as a design surface.

A gasket 18 is provided at the bottom end of the wall member 14, and a concrete wall 20 is poured below the sealing material. If the wall member 14 is divided, the gasket 18 is provided below each wall member 14. This prevents the filling member 6 from leaking from the wall member 14.

As shown in FIG. 5, the connecting member 16 is a member that connects multiple support members 12 arranged in the arrangement direction of the pillars 8 in the pillar arrangement direction. In this embodiment, the connecting member 16 is a cylindrical iron pipe that extends in the arrangement direction of the pillars 8 and is fixed to the iron pipe 12a by a fastener such as a metal fitting. In other words, the support members 12 are connected by fixing the iron pipe extending in the arrangement direction of the pillars 8 to the iron pipe 12a extending in the vertical direction. This increases the rigidity of the reinforcing member 4 in the arrangement direction of the pillars 8.

(2) Reinforcement Procedure for Structural Member 2 The procedure for reinforcing the structural member 2 and constructing the structure 1 will be described with reference to Fig. 6. In this embodiment, the structural member 2 will be described by taking a continuous girder bridge as an example.

As shown in FIG. 6(a), first, the support member 12 is placed in the space between the bridge floor member 10 and the ground W, away from the pier 8a. In this embodiment, iron pipes 12a and 12b are pumped up. The placed support member 12 may be fixed to the ground W by an anchor or the like. At this time, a concrete wall 20 may be poured below the wall member 14. The connecting member 16 may be attached when constructing the support member 12.

Next, as shown in FIG. 6(b), the connecting member 14a is fixed to the support member 12, and the wall member 14 is fixed to the connecting member 14a. The wall member 14 is erected without any gaps between the floor member 10 and the concrete wall 20. In this way, in the method of repairing the structural member 2, the reinforcing member 4 is constructed first.

Next, as shown in FIG. 6(c), the filling member 6 is filled into the space surrounded by the wall member 14 and the floor member 10. The filling member 6 is filled between the wall member 14 and the structural member 2, and is filled without any gaps up to the periphery of the pier 8a. In this embodiment, the raw material for rigid urethane foam is discharged into the space surrounded by the wall member 14, the floor member 10, and the ground W, and is foamed and hardened. Rigid urethane foam has the characteristic of a short construction period, since the raw material is discharged, foamed, and hardened in a relatively short time.

In this way, a structure 1 is constructed using the reinforcing member 4.

(3) Modifications Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the invention. In particular, the multiple modifications described in this specification can be arbitrarily combined as necessary.

For example, in the above embodiment, the structure 1 is described as a continuous girder bridge, but the structure 1 may be any structure other than a bridge as long as it employs a similar structure. For example, the reinforcing member 4 of the present disclosure may be used in the foundation structure of a building.

In addition, in the above embodiment, the reinforcing members 4 are arranged on the left and right sides of the pillars 8 along the arrangement direction of the pillars 8, but the present disclosure is not limited to this. For example, in order to fill the periphery of the pier 8a with the filling member 6, the reinforcing members 4 may be arranged to surround the periphery of the pillars 8.

That is, the following invention can be understood from the description of this specification.
A structural member having a floor member and a support column supporting the floor member;
A reinforcing member having a support member and a wall member supported by the support member;
A filler member that is filled between the wall member and the support;
Equipped with
The support member is disposed at a distance from the support column and the floor member,
The wall member is disposed at a distance from the support and stands between the floor member and the ground,
The filling member fills a space surrounded by the wall member and the floor member, and the filling member wraps around the support column and is in close contact with the support column.
Struct.

(4) Effects and Effects According to the reinforcing member 4 of the present disclosure, by disposing the reinforcing member 4 at a distance from the structural member 2, when filling the filling member 6, it is possible to easily construct a wall member 14 that blocks the filling member 6 and functions as a formwork for the filling member 6. This makes it possible to shorten the construction period. If the construction period can be shortened in this way, for example, when the structure 1 is used for a road, the period of road closure can be reduced. Therefore, a reinforcing method using such a reinforcing member 4 is suitable as a reinforcing method when the structural member 2 used for the road has deteriorated.

The reinforcing member 4 is also positioned at a distance from the structural member 2. This means that there is no need to fix the reinforcing member 4 to the structural member 2, and there is no need to process the structural member 2. This allows the structural member 2 to be reinforced without applying a load to it.

In this embodiment, the filling member 6 fills the spaces between the abutments 7a and also fills around the piers 8a. As a result, if the filling member 6 is made of rigid urethane foam, the entire lower part of the floor member 10 can be filled with rigid urethane foam without any gaps. As a result, if a force acts in the direction of the arrangement of the pillars 8 to topple the filling member 6, the abutments 7a in the front-to-rear direction will support it. This increases the rigidity of the lightweight embankment structure in the direction of the arrangement of the pillars 8. Increasing the rigidity of the lightweight embankment structure makes the structure 1 more earthquake-resistant.

Furthermore, since multiple support members 12 are arranged in line in the arrangement direction of the pillars 8 and are embedded in the filling member 6, the strength of the filling member 6 near the wall member 14 is improved. This further increases the rigidity of the filling member 6. Furthermore, when multiple support members 12 are connected by connecting members 16, the support members 12 can support the filling members 6, thereby further increasing the rigidity.

In addition, the rigid urethane foam material is lightweight and places a small load on the ground W. Therefore, the structural member 2 can be changed to a lightweight embankment structure without placing a load on the ground W.

As described above, the present disclosure provides a reinforcement member 4 that can be installed more easily, a method for repairing a structural member 2, and a structure 1 that uses this reinforcement member 4.

1: Structure, 2: Structural member, 4: Reinforcement member, 6: Filling member, 7a: Abutment, 8a: Pier (an example of a support), 10: Floor member, 12: Support member, 12a, 12b: Iron pipe, 14: Wall member, 14a: Connection member, 16: Linking member, 18: Gasket, 20: Concrete wall, W: Ground

Claims (6)

A reinforcing member for reinforcing a structural member using a filling member,
a wall member that blocks the filling member;
a support member disposed on a side where the filling member is injected and supporting the wall member ;
Equipped with
The support member is formed by combining a plurality of first pipes extending in a vertical direction and a second pipe connecting the plurality of first pipes and extending in a horizontal direction, and is disposed at a distance from the structural member.
Reinforcing material. a placement step of placing a plurality of the support members at a distance from the structural member;
a filling step of filling the space between the wall member and the structural member with the filling member;
A method for reinforcing a structural member using the reinforcing member according to claim 1, comprising: A structural member having a support pillar;
a reinforcing member formed by combining a plurality of first pipes extending in a vertical direction and a second pipe connecting the plurality of first pipes and extending in a horizontal direction, the reinforcing member having a support member disposed apart from the structural member and a wall member supported by the support member;
A filler member that is filled between the wall member and the support;
A structure comprising: A reinforcing member for reinforcing a structural member using a filling member,
a wall member that blocks the filling member;
a support member disposed on a side where the filling member is injected, embedded in the filling member, and supporting the wall member;
Equipped with
the support member is spaced apart from the structural member;
Reinforcing material. a placement step of placing a plurality of the support members at a distance from the structural member;
a filling step of filling the space between the wall member and the structural member with the filling member and burying the support member in the filling member ;
A method for reinforcing a structural member using the reinforcing member according to claim 4 , comprising: A structural member having a support pillar;
a reinforcing member including a support member spaced apart from the structural member and a wall member supported by the support member;
A filler member that is filled between the wall member and the support;
Equipped with
The support member is embedded in the filling member.
Struct.