JP4787381B1 - Girder bridge suspension method using girder bridge suspension jig - Google Patents

Abstract

A girder bridge suspension jig that allows a girder bridge to be installed or removed by attaching a girder bridge suspension jig to a girder bridge without removing the obstacle even if an obstacle exists above. I will provide a.
A horizontal member 11B that horizontally spans a pair of side walls 102A and 102B of a girder bridge, a suspension pulley connection flange 16B supported by the horizontal member 11B, and a suspension pulley connection pin formed on the suspension pulley connection flange 16B. A girder bridge suspension jig 10 having a crane wire connecting member made of an insertion hole is used. When the horizontal member 11B of the girder bridge suspension jig 10 is horizontally mounted on a pair of side walls, it is at a height position between the upper ends of the side walls 102A and 102B and the center of gravity of the girder bridge and between these side walls 102A and 102B. The suspension pulley connection pin 17 is connected and suspended to the suspension pulley connection pin insertion hole and the suspension pulley connection pin insertion hole formed in the suspension pulley main body 202 suspended from the crane wire 203 so as to be positioned at a substantially central position. Lower.
[Selection] Figure 3

Description

The present invention relates to a suspension method for a girder bridge using a girder bridge suspension jig , in particular, even if an obstacle exists above a girder bridge that has already been installed, the gutter bridge is removed without removing the obstacle. Or it is related with the suspension method of the girder bridge using the girder bridge suspension jig which can be newly constructed.

  Conventionally, the thing of patent document 1 is known as a suspension jig | tool for suspending a predetermined heavy load simply and reliably. In this case, the middle part of the wire of the suspension jig is hooked on the crane hook, and the wire hooks attached to both ends of the wire are hooked on the transported object. Then, the crane hook is raised to lift the conveyed item. In this suspension jig, springs are arranged in parallel at both ends of the wire. And this transported object is suspended by winding up a crane wire. When the wire is lifted, both wire hooks are always pulled upward by the spring even when the wire is slackened, so that the wire hook remains caught on the transported object and does not come off. Further, after pulling up to make the wire tight, the crane is operated to carry the suspended goods.

JP 7-215656 A

According to the suspension jig described in Patent Literature 1, the crane hook and the pair of wire hooks form a triangle through the wire because the transported object is hooked on the wire hooks at both ends of the wire and suspended. . Therefore, in order to pull up the conveyed product, a working height that is higher than the height of the triangle is required. The work height is the height from the upper end of the suspended object to the tip of the beam of the crane, and is the height required for the operation of hanging the suspended object with the crane.
For this reason, when the above-mentioned suspension jig is used, the height between the upper end of the transported object and the obstacle at a place where an obstacle (for example, an overhead train line or an electric wire) exists above the transported object. Is lower than the above working height, the only way to lift the transported object was to remove or remove this obstacle.
For example, in the case of a girder bridge used for an iron bridge, etc., when using the above-mentioned suspension jig, the work for removing the already installed electric wire etc. and the work for re-installing are necessary, and the limited time The work of replacing the girder bridge inside was extremely complicated and extremely difficult.

Therefore, the present invention provides a girder bridge suspension jig capable of safely suspending the garter bridge without removing the obstacle even if an obstacle exists above the existing girder bridge. The object is to provide a suspension method for the used girder bridge .

The invention according to claim 1 is a girder bridge having a square floor slab having a pair of side edges and a pair of end sides, and a pair of side walls each having a predetermined height standing from the pair of side edges. Is a girder bridge suspension method using a girder bridge suspension jig that is suspended by a crane using a girder bridge suspension jig, wherein the girder bridge suspension jig is disposed laterally between the pair of side walls. A horizontal member that is mounted, and a crane wire connecting member that is provided at a position lower than the horizontal member and connected to a crane wire. The horizontal member is connected to the pair of side walls of the girder bridge. The girder bridge in which the crane wire connecting member is positioned at a height position between the upper ends of the pair of side walls and the center of gravity of the girder bridge when mounted so as to be horizontally mounted and at the center position of the floor slab This is a suspension method for a girder bridge using a suspension jig .

The floor slab is a square (including a rectangle) floor member having a pair of side sides (long sides) and a pair of end sides (short sides) having a predetermined width. Examples of this slab include an RC slab, a PC slab, a steel slab, and a synthetic slab.
The pair of side walls are plate walls having a constant height, such as a rectangle and an I-shaped section, which are erected vertically from the pair of side sides. The sizes of the pair of side walls are preferably the same. The girder bridge is a bridge configured so as to have a substantially U-shaped cross section with an upper portion opened by the floor slab and the pair of side walls.
Hanging means that the girder bridge is hung on the crane using a crane wire.
The horizontal member is a member that horizontally extends between a pair of side walls, and is composed of a high-strength member such as a steel plate or a steel bar. The length of the horizontal member is equal to or slightly longer than the length of the edge of the floor slab (that is, the width of the floor slab).
The said crane wire connection member is for connecting the crane wire provided in the crane, and can be comprised with a pulley, a hook, etc. The crane wire extends from the winch of the crane and hangs down from the tip of the beam via a sheave at the tip of the beam. A hook, a pulley or the like can be provided at the suspended end of the crane wire. A method of connecting the crane wire to the crane wire connecting member is arbitrary. The crane wire may be directly tied to the crane wire connecting member. Further, a pulley or hook may be attached to the crane wire, and the pulley or hook may be hooked on the crane wire connecting member.
The crane wire connecting member is disposed at a height position between the upper ends of the pair of side walls and the center of gravity of the girder bridge, and in plan view, at a substantially central position of the floor slab. Here, the center position of the floor slab does not indicate only the center point of the floor slab in plan view, but an angle at which the girder bridge can be safely lifted when the girder bridge is suspended by a crane wire ( For example, it means that the crane wire connecting member is provided at a position where the floor slab is not completely horizontal but is inclined to an acceptable level. The center means not the geometrical center but the center of gravity.
When this crane wire connecting member is provided at a position higher than the upper end of the side wall, it means that the height between the obstacle and the girder bridge is reduced by the crane connecting member due to the obstacle existing above. This adds difficulty to the suspension of the girder bridge with a crane.
On the other hand, when the crane wire connecting member is provided at a position lower than the center of gravity of the girder bridge, there is a problem in the stability of the girder bridge posture when the girder bridge is hung, and it may not be hung safely. There is.
From the viewpoint of work efficiency when connecting the crane wire to the crane wire connecting member, the crane wire connecting member is preferably provided at a position close to the center of gravity of the girder bridge.
The crane wire connecting member is provided at the center position of the floor slab when viewed in plan. For this reason, the girder bridge has a good balance of posture and can be suspended safely.

According to the first aspect of the present invention, for example, the horizontal member is attached so that the side walls are horizontally mounted by fixing both ends of the horizontal member to the pair of side walls. As a result, the crane wire connecting member is disposed at a height position between the upper ends of the pair of side walls and the center of gravity of the girder bridge and at the center position of the floor slab in plan view. After attaching the girder bridge suspension jig to the girder bridge in this way, the crane wire is connected to the crane wire connecting member. And by winding up a crane wire, a girder bridge is lifted by one hanging. At this time, the crane wire connecting member serving as the lower end of the crane wire is disposed at the center of gravity of the girder bridge in plan view, and is lower than the height of the side wall in side view and equal to or higher than the center of gravity of the girder bridge. Since it is arrange | positioned in the position, it becomes easy to hold | maintain the attitude | position of the girder bridge in the suspended state substantially horizontal, and it can suspend stably.
At this time, since the crane wire connecting member is disposed at a position lower than the upper end of the side wall, the working height of the crane is not affected. Therefore, even if an obstacle exists above the girder bridge, the gutter bridge can be lifted without removing the obstacle.

According to a second aspect of the present invention, a leg member is fixed to the horizontal member so as to protrude downward, and a horizontal attachment member passing above the center position of the floor slab is fixed to the leg member. The suspension method of the girder bridge using the girder bridge suspension jig according to claim 1, wherein the crane wire connecting member is provided on an attachment member directly above the center position of the floor slab.
The girder bridge suspension jig includes a horizontal member, a leg member perpendicular to the horizontal member is provided, and a horizontal attachment member is fixed to, for example, a lower end of the leg member. And a crane wire connection member is arrange | positioned in a predetermined position via this attachment member. Therefore, the crane wire connecting member in the girder bridge suspension jig is positioned at a predetermined position between the side walls of the girder bridge, and the connection work with the crane wire is facilitated.

According to this invention, the girder bridge suspension jig is attached to the girder bridge by, for example, fixing both ends of the horizontal member to the upper ends of the pair of side walls of the girder bridge. As a result, the crane wire connecting member is located at the center position of the floor slab, that is, at a position substantially above the gravity center position of the girder bridge and lower than the upper end of the side wall. Therefore, when the girder bridge is lifted by, for example, four-point suspension by using the girder bridge suspension jig, it can be suspended in a stable posture.
Further, since the crane wire connecting member is attached at a position lower than the side walls, the height from the upper end of these side walls to the attaching position of the crane wire connecting member can be subtracted from the height required for suspension. For this reason, the work height by a crane can be ensured and even if an obstacle exists above the girder bridge, the girder bridge can be lifted without removing the obstacle.

It is a perspective view of the girder bridge suspension jig concerning one example of this invention. It is a perspective view which shows a state when the girder bridge suspension jig | tool which concerns on one Example of this invention is attached to the girder bridge. It is a figure which shows a state when performing slinging using the girder bridge suspension jig | tool which concerns on one Example of this invention.

A girder bridge suspension method using a girder bridge suspension jig according to an embodiment of the present invention will be described below with reference to FIGS.

  The girder bridge suspension jig 10 according to one embodiment of the present invention is horizontally installed between the pair of side walls 102A and 102B of the existing girder bridge 100 when used. That is, the girder bridge suspension jig 10 is integrated with the girder bridge 100 by being fixed to the girder bridge 100. The crane 200 lifts the girder bridge 100 by connecting the girder bridge suspension jig 10 and the suspension pulley main body 202 with the suspension pulley connecting pin 17.

As shown in FIG. 2, the girder bridge 100 includes a rectangular floor slab 101 in a plan view and a pair of side walls 102 </ b> A and 102 </ b> B each having a predetermined height standing vertically from the side of the floor slab 101. Composed.
The floor slab 101 is a rectangular steel slab having a pair of side sides having a predetermined length and a pair of end sides having a predetermined width. The floor slab 101 is formed in a rectangular plate shape with a steel plate. The floor slab 101 may be a lattice-shaped floor slab that is connected and formed so as to be rectangular when viewed in plan with a shape steel such as H-shaped steel or I-shaped steel. The length and width are determined by the application of the girder bridge 100 and the required digit length.
The side walls 102 </ b> A and 102 </ b> B are erected vertically from a pair of sides that are sides extending in the length direction of the floor slab 101.
The pair of side walls 102A and 102B are made of a rectangular steel plate having an I-shaped cross section. The pair of side walls 102A and 102B have the same height and length.
The pair of side walls 102A and 102B are erected so as to be parallel to each other. The distance between the pair of side walls 102A and 102B is substantially the same as the width of the floor slab 101.

The girder bridge suspension jig 10 is attached to the girder bridge 100 configured as described above.
This girder bridge suspension jig 10 has a pair of side wall horizontal members 11A and 11B that respectively cross the pair of side walls 102A and 102B. The pair of side wall horizontal members 11A and 11B are provided in parallel with a predetermined interval, and the pair of first bridge members 12A and 12B are provided between the side wall horizontal members 11A and 11B. Are installed parallel to each other. A pair of second bridge members 13A and 13B parallel to each other bridge between the pair of first bridge members 12A and 12B. That is, the side wall cross members 11A and 11B are orthogonal to the side walls 102A and 102B, and the first bridge member is orthogonal to the side wall cross members 11A and 11B (in parallel to the side walls inside the side walls 102A and 102B). The second bridge members 13A and 13B are fixedly provided so as to be orthogonal to the first bridge members 12A and 12B (in parallel with the inner side walls 11A and 11B). Therefore, the side wall member and the first and second bridge members have a cross-girder structure when viewed as a whole.
A pair of second bridge members 13A and 13B disposed orthogonally and parallel to each other at substantially the center position between the side walls 102A and 102B are provided with four support frame mounting members 14A and 14A having the same length. 14B, 14C and 14D are suspended vertically from these second bridge members 13A and 13B. That is, the lower ends of these four support frame mounting members 14A, 14B, 14C, and 14D, the upper ends of which are fixed to the second bridge members 13A and 13B, respectively, form four vertices of a quadrangle in plan view. It is arranged.
The adjacent lower ends of these support frame mounting members 14A, 14B, 14C, and 14D are connected by a rectangular support frame 15 in plan view. That is, each vertex of the rectangular support frame 15 is fixed to the lower ends of these support frame attachment members 14A, 14B, 14C, and 14D, and the support frame 15 is held horizontally.
In the support frame 15 formed by connecting the strips in a quadrangular shape, a pair of opposing sides provided in parallel with the side walls 102A and 102B are located at intermediate positions in the length direction, and both ends thereof are It is bridged by a pair of fixed pulley connection flanges 16A and 16B. The pair of suspension pulley connection flanges 16 </ b> A and 16 </ b> B are arranged to face each other with a predetermined gap upward at substantially the center position of the quadrangle formed by the support frame 15. The pair of suspension pulley connection flanges 16A and 16B are respectively formed with suspension pulley connection pin insertion holes having the same diameter at the same height, and each suspension pulley connection pin insertion hole has a circular cross section. The suspension pulley connecting pin 17 is inserted and held. The suspension pulley connecting pin 17 is arranged at substantially the center position of the support frame 15, that is, at the center position of the first and second bridge members 12A, 12B, 13A, and 13B having a cross beam shape in plan view. This coincides with the case where the suspension pulley connecting pin 17 is viewed in plan with respect to the center of gravity position of the girder bridge 100, and is lower than the upper ends of the side walls 102A and 102B in side view and from the center of gravity position of the girder bridge 100. It means that it is arranged at a high position.

  More specifically, the side wall lateral members 11A and 11B are formed of an H-shaped steel material having a length substantially the same as the length between the side walls. The pair of side wall support members 11A and 11B are formed slightly longer than the separation distance between the pair of side walls 102A and 102B, and both ends thereof are formed on their upper surfaces at predetermined positions in the length direction of the side walls 102A and 102B. Each is fixed by, for example, a bolt connection. Further, the pair of side wall horizontal members 11A and 11B are separated from each other by a predetermined distance so as to be parallel to each other, and are symmetrical with respect to the bisector of the side walls 102A and 102B in the side wall length direction. It is fixed. Therefore, these side wall member 11A, 11B is provided at right angles to the length direction (extending direction) of the side walls 102A, 102B.

The first bridge members 12A and 12B are both made of H-shaped steel having the same length as the length between the side wall transverse members 11A and 11B.
One first bridge member 12A of the pair of first bridge members has both ends positioned at an inner side by a predetermined length from one end of the pair of side wall lateral members 11A and 11B toward the other end. It is fixed. That is, both ends of one first bridge member 12A are fixed to the pair of side wall lateral members 11A and 11B by welding.
The other first bridge member 12B of the pair of first bridge members is located at a position that is a predetermined length inward from the other end of the pair of side wall lateral members 11A and 11B toward one end. It is fixed. That is, both ends of the other first bridge member 12B are fixed to the pair of side wall lateral members 11A and 11B by welding.
The pair of first bridge members 12A and 12B are fixed at right angles to the pair of side wall cross members 11A and 11B. When viewed in plan, these members are located inside the pair of side walls 102A and 102B and these members. A quadrangular space is formed inside 12A, 12B, 11A, and 11B.

  The second bridge members 13A and 13B are made of H-shaped steel having the same length. One second bridge member 13A is fixed to an inner position by a predetermined length from one end in the length direction of the pair of first bridge members 12A and 12B, and the other second bridge member 13B is attached thereto. Oppositely fixed to the inner position by a predetermined length from the other ends of the first bridge members 12A and 12B. In other words, both ends of one second bridge member 13A are welded to the pair of first bridge members 12A and 12B, respectively, and the other second bridge member 13B has the same first ends. Are respectively welded to the bridge members 12A and 12B. The second bridge members 13A and 13B are fixed at right angles to the pair of first bridge members 12A and 12B. As a result, the second bridge members 13A and 13B are the first bridge members. A quadrangular opening is formed inside 12A and 12B.

The support frame mounting members 14A, 14B, 14C, and 14D are formed of H-shaped steel having the same length.
The upper end of the support frame mounting member 14A is fixed to the bottom surface of one end in the length direction of the second bridge member 13A. Similarly, the upper end of the support frame mounting member 14B is fixed to the bottom surface of the other end of the second bridge member 13B in the length direction. The upper end of the support frame mounting member 14C is fixed to the bottom surface of the other end of the second bridge member 13B and the upper end of the support frame mounting member 14D is fixed to the bottom surface of one end of the second bridge member 13B. . These support frame mounting members 14A to 14D are all suspended vertically, and the support frame 15 which is the above-described rectangular frame is fixed to the lower end thereof.
When the crane girder bridge suspension jig 10 according to this embodiment is attached to the pair of side walls 102A and 102B, the suspension pulley connecting pin 17 described later is lower than the upper ends of the side walls 101A and 101B, and the girder bridge The lengths of these four support frame mounting members 14A, 14B, 14C, and 14D are determined so as to be positioned immediately above the center of gravity of 100.

The support frame 15 is a rectangular frame in plan view, and the support frame 15 is formed of four H-shaped steels. The support frame 15 includes a pair of long side frame members having an H-shaped cross section extending linearly and a pair of short side frame members having an H-shaped cross section extending linearly. By fixing these long side frame members and these short side frame members by welding, a rectangular frame is formed in plan view.
The support frame 15 is positioned at the lower ends of the four support frame mounting members 14A, 14B, 14C, and 14D, so that the support frame 15 has the four support frame mounting members 14A, 14B, and 14C. , 14D are welded to the lower end.

The suspension pulley connecting flanges 16A and 16B are formed of a steel plate having a shape in which a semicircle and a rectangle having a long side of a chord of the semicircle are combined.
The pair of suspension pulley connection flanges 16 </ b> A and 16 </ b> B are welded to a position separated by a predetermined length from the center of the pair of long side frame members of the support frame 15. For this reason, the pair of suspension pulleys is configured so that the structure constituted by the support frame 15 and the pair of suspension pulley connection flanges 16A and 16B is symmetrical with respect to the axis passing through the center of the pair of long side frame members. The connection flanges 16A and 16B are welded to the support frame 15.
A circular through hole (a suspension pulley connection pin insertion hole) is formed at a substantially central position of the pair of suspension pulley connection flanges 16A and 16B.

The suspension pulley connection pin 17 is inserted into a suspension pulley connection pin insertion hole formed in the pair of suspension pulley connection flanges 16A and 16B. The suspension pulley connection pin 17 is a steel bar having a circular cross section, and is formed in a size that can be freely inserted into and removed from a suspension pulley connection pin insertion hole formed in the suspension pulley connection flanges 16A and 16B.
When the crane girder bridge suspension jig 10 is attached to the pair of side walls 102A and 102B, the suspension pulley connecting pin 17 is lower than the upper ends of the side walls 101A and 101B and directly above the center of gravity of the girder bridge 100. It is provided so that it may be located.

A method of suspending the girder bridge 100 using the crane 200 using the girder bridge suspension jig 10 configured as described above will be described with reference to FIGS.
In this embodiment, the crane 200 that lifts the girder bridge 100 has a guide sheave 201B and a point sheave 201C at the tip of the beam 201A. A winch (not shown) is provided at the base end of the beam 201A. The crane wire 203 is suspended downward from the tip of the beam 201A through the guide sheave 201B and the point sheave 201C. The crane wire 203 extends toward the tip of the beam via a suspension pulley 202A provided on the suspension pulley body 202, and the tip of the crane wire 203 is tightly connected to the tip of the beam 201A. For this reason, the suspension pulley main body 202 is suspended from the tip of the beam 201A.
A suspension pulley connection pin insertion hole through which the suspension pulley connection pin is inserted is formed in the lower portion of the suspension pulley body 202.
The girder bridge 100 is suspended by using the crane 200 configured as described above.

First, a girder bridge suspension jig 10 according to one embodiment of the present invention is prepared.
Next, as shown in FIG. 2, the girder bridge suspension jig 10 is attached between the side walls 102 </ b> A and 102 </ b> B of the girder bridge 100. Specifically, the girder bridge suspension jig 10 is configured so that the pair of side wall lateral members 11A and 11B, which are constituent members of the girder bridge suspension jig 10, cross the pair of side walls 102A and 102B. Place. Thereafter, both ends of the pair of side wall lateral members 11A and 11B are fixed to the upper surfaces of the pair of side walls 102A and 102B with bolts. At this time, it attaches so that the position of the suspension pulley connection pin 17 in this girder bridge suspension jig 10 may be located just above the gravity center of this girder bridge 100.
When the girder bridge suspension jig 10 is attached to the girder bridge 100 in this manner, the suspension pulley connecting pin 17 is located between the upper ends of the pair of side walls 102A and 102B and the center of gravity of the girder bridge 100. It is provided so that it may be located.

Thereafter, the suspension pulley body 202 suspended by the crane wire 203 from the tip of the beam 201A of the crane 200 is sandwiched between the pair of suspension pulley connection flanges 16A and 16B. At this time, one through hole is formed by the suspension pulley connection pin insertion hole formed in the lower part of the suspension pulley body 202 and the suspension pulley connection pin insertion hole.
Thereafter, the suspension pulley connecting pin 17 is inserted into the formed through hole.

After the suspension pulley connecting pin 17 is inserted, the girder bridge 100 can be lifted by winding up the crane wire 203 with a winch.
Note that the winding height is appropriately adjusted depending on the working environment.
By using the girder bridge suspension jig 10 according to one embodiment of the present invention, even if an obstacle exists above, the girder bridge 100 is slung without removing this obstacle, and this girder bridge 100 Can be lifted in a stable posture.
For this reason, the construction period when attaching or removing the girder bridge 100 can be significantly shortened.

10 Girder bridge suspension jig,
11A, 11B Side wall horizontal member,
12A, 12B First bridge member,
13A, 13B Second bridge member,
15 support frame,
16A, 16B Hanging pulley connection flange,
17 Suspension pulley connection pin,
100 Girda Bridge,
101 floor slab,
102A, 102B side walls,
200 crane,
203 Crane wire.

Claims (2)

A girder bridge having a square floor slab having a pair of side edges and a pair of end sides, and a pair of side walls each having a predetermined height erected from the pair of side edges, and a girder bridge suspension jig A girder bridge suspension method using a girder bridge suspension jig that is suspended by a crane,
The girder bridge suspension jig includes a horizontal member that is horizontally mounted between the pair of side walls , and a crane wire connecting member that is provided at a position lower than the horizontal member and connected to a crane wire. ,
When the horizontal member is attached so as to cross the pair of side walls of the girder bridge, the floor slab is at a height position between the upper ends of the pair of side walls and the center of gravity of the girder bridge. A girder bridge suspension method using a girder bridge suspension jig in which the crane wire connecting member is located at the center position of the girder . A leg member is fixed to the horizontal member so as to protrude downward, and a horizontal mounting member that passes above the center position of the floor slab is fixed to the leg member, and is directly above the center position of the floor slab. The suspension method of the girder bridge using the girder bridge suspension jig of Claim 1 with which the said crane wire connection member was provided in the attachment member which corresponds.

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