JP2023041499A - Bridge integral structure and method for manufacturing the same - Google Patents

Abstract

To provide a structure and its manufacturing method for effectively utilizing a lower space of a floor slab in a bridge.SOLUTION: A bridge integral structure 10 includes a building 18 that is installed on the lower side of a floor slab 16 of the bridge 12 and between substructures 14, 14 supporting the floor slab 16 and forms a space 18a for living, traffic, or accommodation, and a filling material 20 that is filled between the floor slab 16 and the building 18. As the filling material 20, for example, polyurethane foam foamed in situ can be used.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a bridge integrated structure provided with a space for living, traveling or accommodation, and a manufacturing method thereof.

In a bridge, a floor slab is provided on a bridge girder supported by bridge piers rising from the ground to constitute a road surface on which automobiles and the like pass (see, for example, Patent Document 1).

JP 2007-154576 A

Since there is a space between the floor slab and the ground, effective use of this space is required.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems associated with the prior art, and has been proposed to preferably solve them. With the goal.

In order to overcome the above problems and achieve the intended purpose, the integrated bridge structure according to the present invention is
A building that is installed under a floor slab of a bridge and between the substructures that support the floor slab, and forms a space for living, traffic, or accommodation;
and a filling material filled between the floor slab and the building.

In order to overcome the above problems and achieve the intended purpose, the manufacturing method of the integrated bridge structure according to the present invention comprises:
A building that forms a space for living, traffic or housing is installed under the floor slab of the bridge and between the substructures that support the said floor slab,
The gist of the invention is that a filler is filled between the floor slab and the building.

According to the integrated bridge structure of the present invention, the floor slab can be reinforced and the lower side of the floor slab can be effectively utilized.
According to the method for manufacturing a bridge integrated structure according to the present invention, it is possible to effectively utilize the lower side of the floor slab while reinforcing the floor slab.

1 is a cross-sectional view showing a bridge integrated structure according to an embodiment of the present invention; FIG. FIG. 2 is a cross-sectional view taken at a position corresponding to line AA of FIG. 1; It is a perspective view which shows roughly the bridge integrated structure of an Example. It is explanatory drawing which shows the manufacturing process of the bridge integrated structure of an Example.

BEST MODE FOR CARRYING OUT THE INVENTION Next, a preferred embodiment of a bridge integrated structure and a manufacturing method thereof according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the bridge integrated structure 10 includes a building 18 installed below a floor slab 16 of a bridge 12 and between substructures 14 supporting the floor slab 16, the floor slab 16 and the building 18. and a filler 20 filled between. The building 18 defines a living, traveling or accommodation space 18a. The residential space 18a includes, for example, a space used as a store, a residence, or the like. As the space 18a for traffic, for example, there is a space used for a passage through which a person or a vehicle such as a bicycle passes. Examples of the storage space 18a include those used in warehouses, parking lots, and bicycle storage areas. 1 and 2, the space 18a is used as a parking lot.

As shown in FIG. 1, the bridge 12 includes substructures 14 such as piers and abutments rising from the ground, and floor slabs 16 provided on bridge girders 15 supported by the substructures 14 . The bridge 12 of the embodiment exemplifies a road bridge in which a road surface 22 made of asphalt or the like is provided on the upper surface of the floor slab 16 . Further, the bridge 12 of the embodiment exemplifies a concrete bridge in which the substructure 14 and the floor slab 16 are made of reinforced concrete.

As shown in FIGS. 1 and 2, the building 18 has a raft foundation 24 and an upper structure 26 provided on the raft foundation 24. The upper structure 26 on the raft foundation 24 creates the space 18a. forming The raft foundation 24 is a base portion of the building 18 that is in contact with the ground, and supports the load of the building 18 and the load applied to the building 18 by dispersing it over a large area on the ground. Note that the raft foundation 24 referred to here is not limited to a reinforced concrete structure, but may be of a structure other than reinforced concrete, and includes general foundation structures that receive the load of the building 18 with a single plate-like base portion. The upper structure 26 of the embodiment has a pair of lateral walls 26a, 26a rising from the edge of the mat foundation 24, and an upper wall 26b provided so as to bridge over the pair of lateral walls 26a, 26a. The building 18 of the embodiment has a box-like shape with top, bottom, left, and right partitioned by a raft foundation 24 and an upper structure 26, and a space 18a is open on one side or both sides (in the embodiment). The building 18 may be configured by combining panels such as concrete, wood, metal, and FRP, or may be a precast product such as concrete such as a box culvert or metal. For example, when a box culvert is used, the lower wall placed on the ground becomes the mat foundation 24 , and the left and right lateral walls and upper wall become the upper structure 26 . The building 18 may be constructed entirely on site, or may be constructed by a combination of construction methods, for example, the slab foundation 24 may be cast-in-place concrete and the superstructure 26 may be precast. As in the embodiment, the space 18a formed in the building 18 may be used as it is, or a structure such as an interior may be provided in the building 18 according to the use of the space 18a.

The filler 20 should preferably have a specific gravity smaller than that of soil. As the filler 20, for example, polyurethane foam such as on-site foaming polyurethane foam that is foamed at the construction site, raw material soil (sandy soil), cement, water and foam mixed, or air mortar mixed with cement, water and foam Also called foamed lightweight fill (FCB), foamed beads mixed lightweight soil, etc. can be employed. Among these, polyurethane foam is suitable from the viewpoints of light weight, workability, adhesion to the floor slab 16, the substructure 14, the building 18, and the like.

As shown in FIG. 2, the outer surface (surface facing in the front-rear direction) of the filler 20 may be covered with a wall surface material 28 such as a panel, tile, or block.

The integrated bridge structure 10 described above can be manufactured, for example, as follows. There is a bridge 12 which is an automobile bridge on which vehicles can pass on the floor slab 16 (see FIG. 4(a)). A building 18 is installed in the space between the adjacent substructures 14, 14 and under the floor slab 16 (see FIG. 4(b)). At this time, the building 18 can be installed in various ways, such as on-site construction by placing concrete or the like in the space, or by assembling or installing precast products manufactured in a factory or the like in the space. be. In the embodiment, the building 18 is installed away from the bridge girder 15 and the substructure 14 .

Next, a filling material 20 is filled between the floor slab 16 and the building 18 . For example, if a polyurethane foam is used as the filler 20, a mixture of liquid A (polyol) and liquid B (isocyanate) is sprayed on site to form polyurethane foam. By repeating this spraying operation in order from the bottom, the lower side of the floor slab 16 except for the space 18a is filled with the polyurethane foam. At this time, the wall surface material 28 may be used as a formwork by supporting the wall surface material 28 with a frame or the like and installing the wall surface material 28 in advance before the filling material 20 is filled. may In the embodiment, only the filling material 20 is filled from the ground to the floor slab 16, the filling material 20 is in contact with the lateral wall 26a and the upper wall 26b of the building 18, and the left and right substructures 14, and the bridge girder 15 is in contact with the filling material 20. buried in

Before filling the filling material 20, an anchor such as a reinforcement anchor may be driven into the substructure 14, the floor slab 16, the building 18, or the like, and the anchor may be embedded in the filling material 20. - 特許庁In this way, the integrity of the filler 20 with the bridge 12 or building 18 is enhanced, and the load applied to the floor slab 16 can be distributed from the filler 20 to the substructure 14 or building 18 .

According to the bridge integrated structure 10 described above, the space under the floor slab 16 can be effectively utilized as the space 18a for living, traffic, or accommodation. Since the space between the floor slab 16 and the building 18 is filled with the filler 20, vibrations and noises caused by automobiles passing over the floor slab 16 are less likely to be transmitted to the space 18a. In particular, it is preferable that the filler 20 is an on-site foamed polyurethane foam, because the vibration-proof and sound-proof properties are improved, and the temperature change of the space 18a can be suppressed by the heat insulating properties peculiar to the polyurethane foam. According to the manufacturing method described above, the bridge integral structure can effectively utilize the space under the floor slab 16 as a space 18a for living, traffic, or accommodation by a simple method of installing the building 18 and filling the filler 20. You get 10 things.

According to the bridge integrated structure 10 described above, in addition to supporting the floor slab 16 with the substructures 14, 14, the load applied to the floor slab 16 is applied to the filler 20 filled between the floor slab 16 and the building 18. can be dispersed. It can also be said that the bridge integrated structure 10 has been converted from a supporting structure of the floor slab 16 by only the substructure 14 to an earthwork structure in which the floor slab 16 is supported by the filling material 20 that functions like embankment. In this way, the bridge integrated structure 10 receives the load applied to the floor slab 16 also on the surface of the filler 20 , so the floor slab 16 can be reinforced. That is, by forming the bridge integrated structure 10, the life of the existing floor slab 16 can be extended. By using the integrated bridge structure 10, there is no road closure for vehicles or the period of road closure is short compared to installing a new floor slab 16 or attaching a reinforcing member such as a beam to the floor slab 16. The construction period for reinforcing the floor slab 16 is shortened, and the cost for reinforcing the floor slab 16 can be made very low. Moreover, since a large heavy machine is not required, the integrated bridge structure 10 can be constructed even in places where it is difficult for large vehicles to enter. In particular, when the filler material 20 is polyurethane foam, the inherent adhesive properties of polyurethane foam will cause the filler material 20 to adhere to the floor slab 16 , substructure 14 and building 18 . As a result, the load applied from the floor slab 16 to the filler 20 can be distributed to the substructures 14, 14 standing on the left and right and the building 18, and the load of the floor slab 16 can be distributed to the filler 20, the substructure 14, and the building 18. By integrally supporting the building 18, deformation of the filler 20 can be suppressed and the floor slab 16 can be appropriately supported.

By foaming and filling the polyurethane foam as the filler 20 under the floor slab 16, it is easy to carry in the filler 20 because the mixed liquid is only sent with a hose, and since it is a curable resin, rolling compaction is unnecessary. It has various advantages such as shorter curing period than concrete. Moreover, since the liquid mixture is foamed and hardened, the filling material 20 can be efficiently filled even in small gaps and irregularities, and the filling material 20 can be easily filled to every corner of a necessary part. Furthermore, since polyurethane foam is lightweight, it has less impact on the ground.

By forming a space 18a with an upper structure 26 provided on a raft foundation 24, the load applied to the building 18 is received by the planar raft foundation 24 and distributed to the ground. The impact on the ground can be reduced. Therefore, even if the load applied to the floor slab 16 is applied to the building 18 via the filling material 20, the effect on the ground is small, so the building can be installed on soft ground, and the space below the floor slab 16 can be saved. Effective utilization can be carried out with a high degree of freedom.

(Change example)
In addition to the above-described matters, for example, the following may be performed. It should be noted that the present invention is not limited only to the specific description of the examples and modifications below.
(1) A bridge integrated structure may be configured by installing a building on an existing bridge and filling it with a filler, or by installing a building along with a new bridge and filling it with a filler. You may
(2) The shape of the building is not limited to the examples. The shape of the building can be changed as appropriate, as long as the space can be created according to its use.
(3) In the embodiment, a road bridge is exemplified as a bridge, but a railway bridge or the like may be used.
(4) The bridge may be a concrete bridge using concrete for the main structure, a steel bridge using steel for the main structure, or a composite bridge using different materials (e.g. steel and concrete). It can be anything.
(5) Although one type of filler was used in the embodiment, a plurality of types of fillers having different materials and forms may be combined. For example, the lower layer may be formed with air mortar and the upper layer may be formed with polyurethane foam, or a portion may be formed with air mortar and the rest may be formed with polyurethane foam.

10 bridge integral structure, 12 bridge, 14 substructure, 16 floor slab, 18 building,
18a space, 20 filler

Claims (6)

A building that is installed under a floor slab of a bridge and between the substructures that support the floor slab, and forms a space for living, traffic, or accommodation;
A bridge integrated structure comprising: a filler filled between the floor slab and the building. 2. The integrated bridge structure according to claim 1, wherein said filler is polyurethane foam. 3. The integrated bridge structure according to claim 1, wherein said building forms said space by an upper structure provided on a mat foundation. A building that forms a space for living, traffic or housing is installed under the floor slab of the bridge and between the substructures that support the said floor slab,
A method for manufacturing an integrated bridge structure, comprising filling a space between the floor slab and the building with a filler. 5. The method for manufacturing an integrated bridge structure according to claim 4, wherein the polyurethane foam as the filling material is foamed and filled under the floor slab. 6. The method of manufacturing an integrated bridge structure according to claim 4, wherein said building forms said space by an upper structure provided on a mat foundation.

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