Bridge integral structure and its manufacturing method

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]

[0001] The present invention relates to an integral bridge structure having a space for living, traffic or accommodation, and a method for manufacturing the same. [Background technology]

[0002] 2. Description of the Related Art In bridges, a deck that constitutes a road surface on which automobiles and the like travel is provided on girders supported by piers that rise from the ground (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-154576 A Summary of the Invention [Problem to be solved by the invention]

[0004] There is space between the underside of the deck and the ground, and it is necessary to make effective use of this space.

[0005] The present invention has been proposed in view of the above-mentioned problems associated with the conventional technology, and aims to provide an integrated bridge structure that allows effective utilization of the underside of the deck, and a manufacturing method thereof. [Means for solving the problem]

[0006] In order to overcome the above problems and achieve the intended object, the bridge integral structure according to the present invention comprises: A building that is installed under the deck of a bridge and between the substructures that support the deck, and forms a space for living, traveling, or accommodation; The gist of the invention is that it comprises a filler material filled between the deck and the building.

[0007] In order to overcome the above problems and achieve the intended object, the manufacturing method of the bridge integral structure according to the present invention comprises the steps of: A building forming a space for living, traveling or accommodation is installed under the deck of the bridge and between the substructure supporting the deck, The gist of the invention is that a filler material is filled between the deck and the building. Effect of the Invention

[0008] According to the integrated bridge structure of the present invention, the deck can be reinforced while effectively utilizing the underside of the deck. According to the manufacturing method of the bridge integral structure of the present invention, the deck can be reinforced while effectively utilizing the underside of the deck. [Brief description of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing a bridge integral structure according to an embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view taken along a line corresponding to the line AA in FIG. 1. [Diagram 3] 1 is a perspective view showing a schematic view of a bridge integral structure according to an embodiment of the present invention; [Figure 4] 4A to 4C are explanatory diagrams showing the manufacturing process of the bridge integral structure of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Next, a bridge integral structure and a manufacturing method thereof according to the present invention will be described below by way of preferred embodiments with reference to the accompanying drawings. EXAMPLES

[0011] As shown in FIG. 1, the bridge integrated structure 10 includes a building 18 installed under a deck 16 of a bridge 12 and between the substructure 14 supporting the deck 16, and a filler 20 filled between the deck 16 and the building 18. The building 18 forms a space 18a for residence, traffic, or accommodation. Examples of the residence space 18a include spaces used as stores and houses. Examples of the traffic space 18a include spaces used as passageways through which people and vehicles such as bicycles pass. Examples of the accommodation space 18a include spaces used as warehouses, parking lots, and bicycle parking lots. The embodiment shown in FIG. 1 and FIG. 2 is a case in which the space 18a is used as a parking lot.

[0012] As shown in Fig. 1, bridge 12 comprises substructure 14, such as piers and abutments that rise from the ground, and a deck 16 that is provided on bridge girders 15 supported by substructure 14. Bridge 12 in the embodiment is a road bridge in which a road surface 22 made of asphalt or the like is provided on the upper surface of deck 16. Bridge 12 in the embodiment is a concrete bridge in which substructure 14 and deck 16 are made of reinforced concrete.

[0013] As shown in FIG. 1 and FIG. 2, the building 18 has a mat foundation 24 and an upper structure 26 provided on the mat foundation 24, and the space 18a is formed by the upper structure 26 on the mat foundation 24. The mat foundation 24 is a base part of the building 18 that contacts the ground and is designed to support the load of the building 18 and the load applied to the building 18 by distributing it to the ground over a large area. The mat foundation 24 referred to here is not limited to a reinforced concrete structure, and may be a structure other than reinforced concrete, and includes any foundation structure that supports the load of the building 18 on a single plate-shaped base part. The upper structure 26 of the embodiment has a pair of side walls 26a, 26a rising from the edge of the mat foundation 24, and an upper wall 26b provided so as to span the pair of side walls 26a, 26a. The building 18 of the embodiment is a box shape that is partitioned by the mat foundation 24 and the upper structure 26 on the top, bottom, left and right, and one or both sides (embodiment) of the space 18a are open. The building 18 may be constructed by combining panels of concrete, wood, metal, FRP, etc., or may be a precast product of concrete or metal such as a box culvert. 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 side walls and the upper wall become the upper structure 26. The building 18 may be entirely constructed on-site, or a combination of construction methods may be used, for example, by forming the mat foundation 24 with cast-in-place concrete and making the upper structure 26 a precast product. 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 design suited to the purpose of the space 18a may be provided in the building 18.

[0014] It is preferable to use a filler 20 having a smaller specific gravity than soil. Examples of the filler 20 that can be used include polyurethane foam, such as polyurethane foam foamed at the construction site, a mixture of raw soil (sandy soil), cement, water, and air bubbles, or air mortar, such as air-mixed lightweight banking (FCB) or foamed bead-mixed lightweight soil. Among these, polyurethane foam is preferable from the viewpoints of light weight, workability, and adhesion to the deck slab 16, substructure 14, building 18, etc.

[0015] As shown in FIG. 2, the outer surface (the surface facing in the front-rear direction) of the filler 20 may be covered with a wall material 28 such as a panel, tile, or block.

[0016] The above-mentioned integrated bridge structure 10 can be manufactured, for example, as follows. There is a bridge 12, which is an automobile bridge over which vehicles can pass on the deck 16 (see FIG. 4(a)). A building 18 is installed in the space between adjacent substructures 14, 14 and below the deck 16 (see FIG. 4(b)). At this time, the building 18 can be installed in various ways, such as by constructing the building 18 on-site by pouring concrete or the like in the space, or by assembling or installing a precast product manufactured in a factory or the like in the space. In this embodiment, the building 18 is installed away from the bridge girders 15 and the substructure 14.

[0017] Next, filler 20 is filled between floor slab 16 and building 18. For example, if polyurethane foam is used as filler 20, polyurethane foam is formed by spraying and foaming a mixed liquid of A liquid (polyol) and B liquid (isocyanate) on site. This spraying work is repeated from the bottom up, and polyurethane foam is filled under floor slab 16 except for space 18a. At this time, wall material 28 may be used as a formwork by supporting wall material 28 with a frame or the like and setting it in advance before filling with filler 20, or wall material 28 may be set after filling with filler 20. In the embodiment, only filler 20 is filled from the ground to floor slab 16, and filler 20 contacts side wall 26a and upper wall 26b of building 18 and left and right substructures 14, and bridge girder 15 is buried in filler 20.

[0018] Before filling with the filler 20, anchors such as reinforcing anchors may be driven into the substructure 14, the deck 16, the building 18, etc., and the anchors may be embedded in the filler 20. In this way, the integrity of the filler 20 and the bridge 12 or the building 18 is increased, and the load applied to the deck 16 can be distributed from the filler 20 to the substructure 14 or the building 18.

[0019] According to the above-mentioned bridge integral structure 10, the space below the deck 16 can be effectively used as a space 18a for living, traveling, or housing. Since the filler 20 is filled between the deck 16 and the building 18, vibrations and noises caused by automobiles passing over the deck 16 are not easily transmitted to the space 18a. In particular, if the filler 20 is an in-situ foamed polyurethane foam, it is preferable because it improves vibration-proofing and soundproofing properties and also suppresses temperature changes in the space 18a due to the insulating properties unique to polyurethane foam. According to the above-mentioned manufacturing method, the simple method of installing the building 18 and filling the filler 20 can provide the bridge integral structure 10 that can effectively use the space below the deck 16 as a space 18a for living, traveling, or housing.

[0020] According to the above-mentioned bridge integral structure 10, in addition to supporting the deck 16 with the substructures 14, 14, the load applied to the deck 16 can be distributed to the filler 20 filled between the deck 16 and the building 18. It can be said that the bridge integral structure 10 changes the deck 16 support structure by the substructure 14 alone to earthworks that support the deck 16 with the filler 20 that functions like embankment. In this way, the bridge integral structure 10 can reinforce the deck 16 because the load applied to the deck 16 is also received by the surface of the filler 20. In other words, the bridge integral structure 10 can extend the life of the existing deck 16. Compared to constructing a new deck 16 or attaching reinforcing materials such as beams to the deck 16, the bridge integral structure 10 does not suspend traffic of vehicles or suspends traffic for a short period of time, the construction period required for reinforcing the deck 16 is short, and the cost required for reinforcing the deck 16 can be made very low. In addition, since no large heavy machinery is required, the bridge integrated structure 10 can be constructed even in places where it is difficult for large vehicles to enter. In particular, when the filler 20 is an in-situ foamed polyurethane foam, the filler 20 adheres to the deck 16, substructure 14, and building 18 due to the adhesiveness unique to polyurethane foam. This allows the load applied to the filler 20 from the deck 16 to be distributed to the substructures 14, 14 standing on the left and right and the building 18, and by integrally supporting the load of the deck 16 with the filler 20, substructure 14, and building 18, deformation of the filler 20 can be suppressed and the deck 16 can be appropriately supported.

[0021] Filling the underside of the deck 16 with polyurethane foam as filler 20 by foaming it has various advantages, such as easy transportation of the filler 20 by simply sending the mixed liquid with a hose, no need for compaction as it is a hardening resin, and a shorter curing period than concrete. Moreover, because the liquid mixed liquid is foamed and hardened, the filler 20 can be efficiently filled into small gaps and unevenness, and it is easy to fill every nook and cranny where it is needed. Furthermore, polyurethane foam is lightweight, so it has little impact on the ground.

[0022] By forming space 18a with upper structure 26 provided on slab foundation 24, the load applied to building 18 is received by planar slab foundation 24 and dispersed to the ground, thereby reducing the impact of building 18 on the ground. Therefore, even if the load applied to floor slab 16 is applied to building 18 through filling material 20, the impact on the ground is small, so the building can be erected on soft ground, and the space below floor slab 16 can be used effectively with a high degree of freedom.

[0023] (Example of change) The present invention is not limited to the above-mentioned items, and may be, for example, as follows: It should be noted that the present invention is not limited to the specific descriptions of the examples and the following modified examples. (1) A bridge integrated structure may be constructed by installing a building on an existing bridge and filling it with filler material, or by installing a building in conjunction with the construction of a new bridge and filling it with filler material. (2) The shape of the building is not limited to that of the embodiment. The shape of the building can be changed as appropriate as long as a space suitable for the purpose can be formed. (3) In the embodiment, a road bridge is shown as an example of a bridge, but a railway bridge or the like may also be used. (4) The bridge may be a concrete bridge, which uses concrete for its main structure, a steel bridge, which uses steel for its main structure, or a composite bridge, which uses different materials (e.g., steel and concrete). (5) Although one type of filler was used in the examples, multiple types of fillers with different materials, shapes, etc. may be combined. For example, the lower layer may be formed of air mortar and the upper layer may be formed of polyurethane foam, or a portion may be formed of air mortar and the remaining portion may be formed of polyurethane foam. [Explanation of symbols]

[0024] 10 Bridge integral structure, 12 Bridge, 14 Substructure, 16 Deck, 18 Building, 18a space, 20 filler

Claims

1. A building that is installed under the deck of a bridge and between the substructures that support the deck, and forms a space for living, traveling, or accommodation; A filler material having a specific gravity smaller than that of soil is filled between the floor slab and the building over the entire height direction. A bridge integral structure characterized by:

2. A building that is installed under the deck of a bridge and between the substructures that support the deck, and forms a space for living, traveling, or accommodation; and a polyurethane foam filled over the entire height between the floor slab and the building. A bridge integral structure characterized by:

3. A building that is installed under the deck of a bridge and between the substructures that support the deck and forms a space for living, traveling, or accommodation; A filler material filled between the floor slab and the building; and an anchor driven into at least one of the deck, the substructure, or the building and embedded in the filler. A bridge integral structure characterized by:

4. A building forming a space for living, traveling or accommodation is installed under the deck of the bridge and between the substructure supporting the deck, Filling material with a smaller specific gravity than soil is filled over the entire height between the floor slab and the building. A method for manufacturing an integrated bridge structure comprising the steps of:

5. A building forming a space for living, traveling or accommodation is installed under the deck of a bridge and between the substructure supporting the deck, Polyurethane foam is filled between the floor slab and the building over the entire height direction. A method for manufacturing an integrated bridge structure comprising the steps of:

6. A building forming a space for living, traveling or accommodation is installed under the deck of a bridge and between the substructure supporting the deck, Driving an anchor into at least one of the deck, the substructure, or the building; Filling the gap between the deck and the building with a filler so as to embed the anchor. A method for manufacturing an integrated bridge structure comprising the steps of:

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