JP2022167621A - Temporary bridge unit - Google Patents

Abstract

To provide a temporary bridge unit capable of withstanding a necessary and sufficient load as a temporary bridge in times of a disaster such as the passage of a person or a vehicle, and is designed to be suitable for erection by manual labor.SOLUTION: A temporary bridge unit is provided with a plurality of main girder structures 2 extending in the bridge axis direction and arranged at predetermined intervals in the bridge axis orthogonal direction, and a connecting material 6 for connecting the plurality of main girder structures 2 in the bridge axis orthogonal direction; the main girder structure 2 has a sleeper 21, a pair of columns 3 arranged at both ends in the bridge axial direction and provided with a sleeper receiver 33 at an upper end, one or a plurality of connection materials 4 arranged between the pair of columns 3, 3 and provided with a sleeper receiver 43 at an upper end, and a plurality of beam frame materials 5 laid between the column 3 and the connection material 4 or between the connection materials 4, 4. The beam frame member 5 is formed in a frame shape by integrating a plurality of horizontal members 52, 53 arranged at intervals in the vertical direction and connecting members 55, 561, 562 for connecting the horizontal members 52, 53 to each other.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a temporary bridge unit that can be erected by manual labor and that can be suitably used especially in an emergency such as a disaster.

In recent years, bridges have collapsed and washed away frequently due to earthquakes, river floods, and debris flows. be. However, bridges are usually constructed in a short period of time by constructing a base at the edge of a pond or river, or at the edge of a ditch or opening, and connecting multiple shaped steels arranged in parallel to the base. is often difficult to do. Therefore, a temporary bridge unit that can be erected in a short period of time has been proposed (see, for example, Patent Document 1, etc.).

The temporary bridge unit described in Patent Document 1 has a plurality of bridge joints whose lower parts are connected by connecting pins, and hydraulic jacks arranged above each bridge joint. The spacer is inserted after the upper part is pushed apart. With these configurations, by providing an upwardly convex camber, even if a large vertical deflection occurs due to running of a heavy object, it is possible to suppress deterioration in passability.

JP-A-07-279124

However, although the temporary bridge unit described in Patent Document 1 can improve vehicle passability and the like, it is heavy because it has a hydraulic jack, and may not be suitable for manual work. In particular, it may be difficult for heavy machinery to enter deep in the mountains or in the event of a disaster.

In view of the above circumstances, the present invention provides a temporary bridge unit that is capable of withstanding a necessary and sufficient load as a temporary bridge in the event of a disaster, such as the passage of people and vehicles, and is devised to be suitable for erection by manual work. intended to provide

The temporary bridge unit of the present invention for solving the above object is a plurality of main girder structures extending in the bridge axis direction and arranged at predetermined intervals in the bridge axis orthogonal direction perpendicular to the bridge axis direction; A temporary bridge unit comprising a connecting member that connects a plurality of main girder structures in the direction perpendicular to the bridge axis,
The main girder structure includes a girders extending in the bridge axis direction, a pair of pillars provided with girders arranged at both ends of the bridge axis and receiving the girders at the upper ends, and between the pair of girders. One or a plurality of connecting members arranged and provided with a large undercarriage at the upper end for receiving the large pull, and a plurality of beam frame members bridged between the support and the connecting members or between the connecting members. death,
The beam frame member is characterized in that a plurality of horizontal members arranged at intervals in the vertical direction and connecting members that connect the horizontal members are integrated to form a frame shape. do.

Here, the temporary bridge unit may include a plurality of joists extending in the direction perpendicular to the bridge axis and installed on the girders, and a floor panel installed on the joists. Further, the main girder structure and the connecting members are preferably constructed using general structural carbon steel pipes (STK steel pipes) or general structural rolled steel materials (SS materials).

According to the temporary bridge unit of the present invention, the main girder structure includes the beam frame members configured in a frame shape by integrating the plurality of horizontal members and connecting members that connect the horizontal members together. have. As a result, the torsional rigidity and the like of the main girder structure are improved, and the weight of each member can be reduced while securing the load resistance necessary for the temporary bridge in the event of a disaster or the like. As a result, it becomes possible to assemble and erect by manual work.

Moreover, the temporary bridge unit of this invention WHEREIN: The said beam frame material may have a large underpinning which receives the said big pulling.

By adopting this aspect, the beam frame member can also support the hoiki.

Furthermore, in the temporary bridge unit of the present invention, each of the strut and the connecting member has an engaged portion,
The beam frame member has an engaging portion at each end of the horizontal member,
It is preferable that the strut or the connecting member and the beam frame member are fixed by fitting a wedge member into the engaged portion and the engaging portion.

By adopting this aspect, it becomes easy to fix the strut or the connecting member to the beam frame member, and workability can be improved.

Furthermore, in the temporary bridge unit of the present invention, at least one of the connecting member and the beam frame member may have a lower projecting portion to which a supporting leg is attached.

By adopting this aspect, when the depth of the river, the state of the riverbed, etc. allow the installation of the support legs, the support legs are attached to the lower projecting portion, and the load bearing capacity of the temporary bridge unit is increased. It can also improve performance.

Furthermore, in the temporary bridge unit of the present invention, the connecting member is formed into a frame shape by integrating a plurality of horizontal members arranged at intervals in the vertical direction and connecting members connecting the horizontal members together. may be configured.

Here, the connecting member may have the same configuration as the beam frame member.

By adopting this aspect, it is possible to further suppress the sideways collapse of the main girder structure.

According to the present invention, there is provided a temporary bridge unit capable of withstanding a necessary and sufficient load as a temporary bridge in the event of a disaster, such as the passage of people and vehicles, and devised to be suitable for erection by manual work. be able to.

FIG. 4 is a diagram showing a state in which the temporary bridge units of the present invention are installed on both banks of a river; (a) is an enlarged view of a portion A surrounded by a two-dot chain line square in the temporary bridge unit shown in FIG. 1 . (b) is a plan view (viewed from above) of the connecting member shown in (a). (c) is an enlarged perspective view of the bracket shown in (a). 1. It is a figure which expands and shows the B section enclosed with the square of a two-dot chain line in the temporary bridge unit shown in FIG. It is the figure which looked at the temporary bridge unit shown in FIG. 1 from the bridge axis direction. It is the figure which looked at the temporary bridge unit of 2nd Embodiment from the bridge axis direction, and is the figure corresponding to FIG. 4 in the temporary bridge unit of 1st Embodiment. FIG. 4 is a diagram for explaining an example of a construction method of the temporary bridge unit of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a state in which temporary bridge units 10 of the present invention are installed on both banks G, G of a river. In FIG. 1, the lateral direction is the bridge axis direction of the temporary bridge unit 10, and the direction orthogonal to the paper surface is the bridge axis orthogonal direction orthogonal to the bridge axis direction.

As shown in FIG. 1, the temporary bridge unit 10 includes a main girder structure 2 extending in the bridge axis direction. A plurality (four in this embodiment) of the main girder structures 2 are arranged at predetermined intervals in the direction perpendicular to the bridge axis (see FIG. 4).

The main girder structure 2 includes girders 21 extending in the direction of the bridge axis, a pair of pillars 3, 3 having girders 33 disposed at both ends in the direction of the bridge axis and receiving the girders 21 at their upper ends. A plurality of connecting members 4 (five in this embodiment) provided at the upper end with a large undercarriage 43 arranged between the columns 3, 3 and receiving the large pull 21, and between the columns 3 and the connecting member 4 or the connecting member and a plurality of (six in this embodiment) beam frame members 5 bridged between 4 and 4 . Further, in this embodiment, the beam frame members 5 are also provided with the large bearings 57, and the large bearings 33, 43, 57 support the large hangings 21. As shown in FIG. The large pull 21 is made of a square pipe made of steel. A plurality of (six in the figure) obiki 21 are used.

Joists 81 extending in the direction perpendicular to the bridge axis are arranged on the obiki 21 at predetermined intervals in the direction of the bridge axis. A floor panel 82 made of plastic or the like is installed. The floor panel 82 has a plan view rectangular board 821 elongated in the direction of the bridge axis, and a prismatic positioning member 822 that contacts the side surface of the joists 81 to prevent displacement (FIGS. 2A and 2B). 3). As the floor panel 82, the floor panel described in Japanese Patent Application No. 2019-173202 filed by the present applicant may be employed. This floor panel consists of a rectangular plate in plan view, and a plurality of horizontal reinforcing members that have the same height as the joist and are fixed to the back surface of the plate while extending in a direction orthogonal to the longitudinal direction of the plate. The horizontal reinforcing member is placed on the joists in a posture along the joists.

Further, as shown in FIG. 1, a staircase-like step 91 made of blocks or the like is provided adjacent to the pillar 3 on the bank G. As shown in FIG. In place of the step 91, a slope 92 surrounded by a one-dot chain line square in FIG. 1 may be employed. For this slope 92, a slope forming device described in Japanese Patent Application Laid-Open No. 2019-190091 filed by the present applicant can be preferably used. The slope 92 is connected to a base member 921, an inclined member 922 pivotally supported by one end of the base member 921 and constituting a slope, and connected to the other end of the base member 921 and the other end of the inclined member 922, respectively. , and a slope determination member 923 that determines the slope by supporting the other end side of the slope member 922 .

In addition, as indicated by a two-dot chain line in FIG. 1, the shore G may be dug down to form an installation portion G1 that is one step lower, and the pillars 3 may be installed in this installation portion G1. In addition, depending on the water depth of the pond and the state of the bottom of the pond, the supporting legs 3' indicated by the dashed line in FIG. The support leg 3' may have the same structure as the support 3 except for the support 33.

FIG. 2(a) is an enlarged view of part A surrounded by a two-dot chain line in the temporary bridge unit 10 shown in FIG. This FIG. 2(a) is a diagram for explaining the fixing structure of the connecting member 4 and the beam frame member 5 and their respective configurations. In order to simplify the drawing, the ties 21 on both outer sides, the beam frame member 5, and the like are omitted. FIG. 2(b) is a plan view (viewed from above) of the connecting member 4 shown in FIG. 2(a). In addition, in FIG.2(b), the large underwriting 43 is abbreviate|omitted.

As shown in FIGS. 2(a) and 2(b), the connecting member 4 includes a round pipe-shaped connecting member main body 41 and a connecting member provided at the upper end portion of the connecting member main body 41 and having a smaller diameter than the connecting member main body 41. From the portion 411, the large undercarriage 43 attached to the connection portion 411, and the connecting member main body 41, a set of four engaged portions 42 provided in a cross shape in a plan view are vertically spaced apart from each other. are provided in pairs. As shown in FIG. 2(b), the engaged portion 42 is bent in a U shape in plan view and fixed to the connecting member main body 41 at intervals of 90 degrees in plan view. The bracket 54 is engaged from the lateral direction, and the wedge member W is fitted and fixed from above. Further, as described above with reference to FIG. 1, the lower end portion 412 of the connecting member main body 41 is a portion to which the support leg 3' can be attached, and corresponds to an example of the lower projecting portion in the present invention. The connecting member main body 41 is made of, for example, an STK steel pipe, and has a length of about 600 mm in this embodiment.

As shown in FIG. 2(a), the beam frame member 5 has a longitudinal member 51 made of a round pipe in the central portion, and has a symmetrical structure centering on the longitudinal member 51. As shown in FIG. Therefore, the configuration on the left side will be described, and the configuration on the right side will be given the same reference numerals as the configuration on the left side, and the description thereof will be omitted.

One ends of two horizontal members 52 and 53 made of round pipes are welded and connected to the vertical member 51 with a gap therebetween in the vertical direction. A vertical connecting member 55 made of a round pipe and a first inclined connecting member 561 and a second inclined connecting member 562 made of plate members are fixed by welding to the upper horizontal member 52 and the lower horizontal member 53, and are bridged. It is

A vertical connecting member 55 is provided in a vertical position on the outer side between the horizontal members 52 and 53 . In addition, the first inclined connecting member 561 is provided in an inclined posture by fixing its lower end near the vertical member 51 by welding and fixing its upper end near the vertical connecting member 55 by welding. . The second inclined connecting member 562 is provided in an inclined posture by fixing its lower end in the vicinity of the vertical connecting member 55 by welding and fixing its upper end to the end portion of the upper horizontal member 52 by welding. It is

In this way, in the beam frame member 5, the vertical connecting member 55, the first inclined connecting member 561, and the second inclined connecting member 562 connect the horizontal members 52, 53, and the vertical member 51, the horizontal members 52, 52, 53, 53, vertical connecting members 55, 55, first inclined connecting members 561, 561, and second inclined connecting members 562, 562 are integrated to form a frame.

A connecting portion 511 having a small diameter is provided at the upper end portion of the vertical member 51 in the same manner as the connecting portion 411 of the connecting member 4 , and a large bearing 57 is attached to this connecting portion 511 . Further, as described above with reference to FIG. 1, the lower end portion 512 of the vertical member 51 is a portion to which the support leg 3' can be attached, and corresponds to an example of the lower projecting portion in the present invention.

Brackets 54 corresponding to the engaging portions of the present invention are provided at both ends of the horizontal members 52 and 53, respectively. FIG. 2(c) is an enlarged perspective view of the bracket 54 shown in FIG. 2(a).

As shown in FIG. 2( c ), the bracket 54 is substantially U-shaped and has a vertical portion 542 , an upper horizontal portion 541 and a lower horizontal portion 543 . A hanging portion 5411 hanging downward is formed at the tip portion of the upper horizontal portion 541 . An opening 541 a is formed in the upper horizontal portion 541 over the upper end portion of the vertical portion 542 , and an opening 543 a is formed in the lower horizontal portion 543 over the lower end portion of the vertical portion 542 . The opening 541a and the opening 543a are formed to face each other.

In the beam frame member 5, for example, the bracket 54 is made of SS material, and the other members are made of STK steel pipe or the like. In addition, in this embodiment, the beam frame member 5 having a length of about 1500 mm in the bridge axis direction is used in consideration of manual work, but the length in the bridge axis direction does not hinder the work by human power. The length in the bridge axis direction can be appropriately set within a range that does not occur, and it is also possible to use a beam frame member 5 with a length of about 1200 mm or a beam frame member 5 with a length of about 900 m.

As shown in FIG. 2(a), in the beam frame member 5, the brackets 54 provided at both ends of the horizontal members 52, 52, 53, 53 are engaged with the engaged portions 42 of the connecting members 4, By fitting the wedge material W, the beam frame material 5 and the connecting material 4 are fixed. Specifically, the wedge member W is fitted and fixed to the openings 541 a and 543 a of the bracket 54 and the engaged portion 42 .

FIG. 3 is an enlarged view of a portion B surrounded by a two-dot chain line in the temporary bridge unit 10 shown in FIG. This FIG. 3 is a diagram for explaining the configuration of the support 3 and the fixing structure of the support 3 and the beam frame member 5. As shown in FIG.

As shown in FIG. 3, the column 3 includes a pipe-shaped column body 31, a connection portion 311 provided at the upper end portion of the column body 31 and having a diameter smaller than that of the column body 31, and the connection portion 311. A set of four engaged portions 32 provided in a cross shape in a plan view is provided from the attached large bearing 33 and the column main body 31 . Furthermore, a jack 34 is attached to the lower end portion 312 of the support body 31, and installed on the shore G so as to be adjustable in height.

As in the case of fixing the beam frame member 5 and the connecting member 4, the brackets 54 provided at the ends of the horizontal members 52 and 53 are engaged with the engaged portions 32 of the struts 3, and the wedge member W is The beam frame member 5 and the column 3 are fixed by fitting.

FIG. 4 is a view of the temporary bridge unit 10 shown in FIG. 1 as seen from the bridge axis direction. That is, the direction perpendicular to the plane of paper is the direction of the bridge axis.

As shown in FIG. 4, a plurality of main girder structures 2 (four in this embodiment) are arranged at predetermined intervals in the direction perpendicular to the bridge axis, and these main girder structures 2 are connected by connecting members 6. It is The connecting member 6 has a connecting member main body 61 made of, for example, an STK steel pipe and extending in the direction perpendicular to the bridge axis, and brackets 62 made of, for example, an SS material provided at both ends of the connecting member main body 61. there is This bracket 62 has the same configuration as the bracket 54 of the beam frame member 5 shown in FIGS. The bracket 62 is engaged with the engaged portion 32 of the column 3 and the wedge member W is fitted, thereby fixing the connecting member 6 and the column 3 .

Although illustration is omitted, connecting members 4 adjacent to each other in the direction perpendicular to the bridge axis in a plurality of main girder structures 2 are similarly connected by connecting members 6 . In addition, although it is not particularly limited, in this embodiment, the connecting members 6 having a length of 900 mm in the direction perpendicular to the bridge axis are used, but the width dimension of the temporary bridge unit 10 (the length in the direction perpendicular to the bridge axis) ), or the connecting members 6 having different lengths in the direction perpendicular to the bridge axis may be adopted according to the intervals in the direction perpendicular to the bridge axis between the plurality of main girder structures 2 . For example, a connecting member 6 having a length in the direction orthogonal to the bridge axis of 1500 mm, 1200 mm, 750 mm or 600 mm can be adopted.

In each of the main girder structures 2 located outside in the direction perpendicular to the bridge axis, handrail struts 83 are attached to the engaged portions 32 of the struts 3 and the engaged portions 42 of the connecting members 4 (see FIG. 2). A handrail (not shown) extending in the direction of the bridge axis is attached to these handrail supports 83 . 1 to 3, the handrail post 83 and the handrail are omitted for simplification of the drawings.

According to the temporary bridge unit 10 of the present embodiment, the main girder structure 2 includes the horizontal members 52, 53 and the vertical connecting member 55, the first inclined connecting member 561, and the second connecting member 561 that connect the horizontal members 52, 53 to each other. It has a beam frame member 5 integrated with the inclined connecting member 562 to form a frame. As a result, the torsional rigidity and the like of the main girder structure 2 are improved, and the weight of each member can be reduced while securing the load resistance necessary for a temporary bridge in the event of a disaster or the like. As a result, assembly and erection by manual labor are fully possible. Further, the strut 3 and the beam frame member 5, the connecting member and the beam frame member 5, and the main girder structure 2 and the connecting member 6 are engaged with the engaged portions 32 and 42 with the brackets 54 and 62 to form wedge members. It can be fixed by fitting W, and can be easily assembled. Furthermore, when the temporary bridge unit 10 is not used, the storage space can be reduced by disassembling it into individual members.

Next, another embodiment of the temporary bridge unit 10 of the first embodiment shown in FIGS. 1 to 4 will be described. In other embodiments described below, differences from the first embodiment shown in FIGS. The constituent elements of the names are described with reference numerals that have been used so far, and overlapping descriptions may be omitted.

FIG. 5 is a view of the temporary bridge unit 11 of the second embodiment viewed from the bridge axis direction, and is a view corresponding to FIG. 4 of the temporary bridge unit 10 of the first embodiment.

As shown in FIG. 5, in the temporary bridge unit 11 of the present embodiment, a second beam frame member 7 having the same configuration as the beam frame member 5 shown in FIG. 2 is employed as a connecting member. The second beam frame member 7 is formed by integrating a vertical member 71, horizontal members 72 and 73, a vertical connecting member 74, and an inclined connecting member 75 into a frame shape. Brackets 77 are fixed to the ends of the horizontal members 72 and 73 by welding. A jack 76 is provided at the lower end portion of the vertical member 71 , and a large bearing 78 is attached to the upper end portion of the vertical member 71 . Although illustration is omitted, the connecting members 4 adjacent to each other in the direction perpendicular to the bridge axis in the plurality of main girder structures 2 are connected to the second beam frame member 7 without the jack 76, or the connecting member shown in FIG. connected by 6.

According to this embodiment, the horizontal members 72 and 73 and the vertical connecting member 74 and the inclined connecting member 75 that connect the horizontal members 72 and 73 are integrated to form a frame-like second beam frame member. Since the main girder structure 2 is connected by 7, the overturning of the main girder structure 2 and the like can be further suppressed. Furthermore, at both ends of the temporary bridge unit 11 in the bridge axis direction, the joist 81 and the floor panel 82 are also supported by the second beam frame member 7, so that load bearing performance can be improved.

FIG. 6 is a diagram for explaining an example of the construction method of the temporary bridge unit 10 of the present invention.

As shown in FIG. 6(a), a temporary bridge unit 10 is assembled on the ground, and a counterweight temporary bridge unit 10' having the same configuration as the temporary bridge unit 10 is assembled and connected to the temporary bridge unit 10. . Specifically, the brackets 54 and 62 are engaged with the engaged portions 32 and 42 of the post 3 and the beam frame member 5, the connecting member and the beam frame member 5, and the main girder structure 2 and the connecting member 6. It suffices to assemble by fitting and fixing the wedge material W. Also, although illustration is omitted, the pillar 3 portion is placed on a trolley or the like.

Next, as indicated by the arrows in FIG. 6(b), the connected temporary bridge unit 10 and counterweight temporary bridge unit 10' are moved, and the temporary bridge unit 10 is installed on both banks G, G. It should be noted that the hoiki 21, the joist 81 and the floor panel 82 may be installed after being moved to the position shown in FIG. , hoiki 21, joist 81 and floor panel 82 are not required.

Then, after removing the counterweight temporary bridge unit 10', steps 91 and the like may be installed as shown in FIG. 6(c).

According to the temporary bridge units 10 and 11 of the present invention, it is possible to withstand the necessary and sufficient load as a temporary bridge in the event of a disaster such as the passage of people and vehicles, and it is devised to be suitable for erection by manual work. It is possible to provide a temporary bridge unit with

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. For example, in the above-described embodiment, the ohiki 21 made of a square pipe made of steel is used. A large drawer provided with a plurality of connecting plates may be employed. Further, in the above-described embodiment, an example in which the temporary bridge units 10 and 11 are erected on both banks G and G of a river has been described, but the temporary bridge units 10 and 11 are not limited to rivers and may be damaged by a disaster such as an earthquake. It may be installed in a sunken place (hole or groove).

In addition, even if the constituent elements are included only in the description of each of the embodiments described above, the constituent elements may be applied to other embodiments.

10, 11 Temporary bridge unit 2 Main girder structure 21 Obiki 3 Strut 31 Strut main body 32 Engaged part 4 Connecting member 41 Connecting member main body 42 Engaged part 5 Beam frame member 51 Vertical member 52, 53 Horizontal member 54 Bracket (engagement part)
55 Vertical connecting member 561 First inclined connecting member 562 Second inclined connecting member 6 Connecting member 7 Second beam frame member 81 Joist 82 Floor panel 91 Step G Bank W Wedge member

Claims (5)

A plurality of main girder structures extending in the direction of the bridge axis and arranged at predetermined intervals in the direction perpendicular to the bridge axis, and connecting the plurality of main girder structures in the direction perpendicular to the bridge axis. A temporary bridge unit comprising:
The main girder structure includes a girders extending in the axial direction, a pair of pillars provided with girders arranged at both ends in the axial direction and receiving the girders at the upper ends, and between the pair of girders. One or a plurality of connecting members arranged and provided with a large undercarriage at the upper end for receiving the large pull, and a plurality of beam frame members bridged between the pillars and the connecting members or between the connecting members. death,
The beam frame member is characterized in that a plurality of horizontal members arranged at intervals in the vertical direction and connecting members that connect the horizontal members are integrated to form a frame shape. temporary bridge unit. 2. The temporary bridge unit according to claim 1, wherein said beam frame member has a large undercarriage for receiving said large undercarriage. Each of the strut and the connecting member has an engaged portion,
The beam frame member has an engaging portion at each end of the horizontal member,
The post or the connecting member and the beam frame member are fixed by fitting a wedge member into the engaged portion and the engaging portion. 3. A temporary bridge unit according to item 1 or 2. The temporary bridge according to any one of claims 1 to 3, wherein at least one of the connecting member and the beam frame member has a lower projecting portion to which a supporting leg is attached. unit. The connecting member is characterized in that a plurality of horizontal members arranged at intervals in the vertical direction and a connecting member connecting the horizontal members are integrated to form a frame shape. A temporary bridge unit according to any one of claims 1 to 4.

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