JPH116285A - Moving scaffold for assembling floor slab reinforcement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable assembly of forms and that of reinforcement to be performed concurrently by eliminating the need for large hoisting equipment, and enabling a working floor for assembly of the reinforcement to be provided separately from the forms. SOLUTION: A moving scaffold has a scaffold support frame 2 movably placed on a main girder 1, an inter-main-girder working floor 3, an overhanging working floor 4, and a member moving part 6 installed on a cross girder 5. The scaffold support frame 2 has a horizontal member 10 which is supported on legs 7 and from which hanging columns 8 hang down, with lift members 9 attached to the horizontal member 10. The inter-main-girder working floor 3 is removably suspended from the lift members 9. Floor system reinforcement 17 has rigidity such that it can be supported only by the main girders 1, with truss reinforcing bars or the like used for reinforcement. During movement, the inter-main-girder working floor 3 is lowered, is put on the member moving part 6, and is towed by a pulling device, together with the scaffold support frame 2. Thereafter, floor-slab forms are installed, and floor-slab concrete is placed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an efficient slab erection work in which a reinforcing bar of a slab supported by a main girder is assembled before assembling a formwork, and temporarily supported by the main girder, and a slab form is installed. The present invention relates to a movable scaffold for assembling floor slabs which realizes the above.

[0002]

2. Description of the Related Art When constructing a slab of a steel bridge, rebar is assembled on a main girder and a slab form, and then concrete is poured into the slab. In the entering process, the assembling work of the formwork and the rebar cannot be performed at the same time, and there is a disadvantage that the construction period becomes long. For this reason, rebars that have been blocked in parallel with the formwork assembly are assembled at another location,
There has been proposed a method of lifting a block reinforcing bar on a form using a lifting device to shorten a construction period. In this construction method, for example, when constructing a bridge, a reinforcing bar is assembled on the ground below the floor slab, lifted up above the main girder by means of a hanging metal fitting, and the joint is processed on the floor slab form, and then concrete is cast in a short period of time. Was implemented.

[0003]

However, since the block reinforcing bar is quite heavy and the main girder is generally located at a high position from the ground, large lifting equipment must be provided for lifting. There was a disadvantage that the cost of heavy equipment increased. or,
There is also a drawback that applicable bridges are limited because a rebar assembly yard cannot be formed depending on the topography below the floor slab.

[0004] Further, in order to shorten the construction period of the floor slab, there is a case where a floor slab form that can be moved along the main girder while rationalizing the rebar assembling work is used. As a conventional movable floor slab form, for example, as described in Japanese Patent Publication No. 50-30931, a main girder form form and an overhang floor form form are each supported by a shoring, and when a block is moved, It has been known that the members of each set are separately moved in the bridge axis direction by using the main girder form moving section and the overhang floor slab form moving section.

[0005] However, the conventional floor slab form requires a step of removing the form and truss from the main girder, moving the form and truss onto the scaffold each time it moves, and then attaching the form and truss to the main girder again. In addition, there is a problem in terms of safety because the disassembly and assembling work at a high place is repeatedly performed.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and eliminates the need for a large lifting device for lifting an assembled rebar, and provides a work floor for rebar assembly separately from the formwork regardless of the terrain below the floor slab. It is an object of the present invention to provide a movable scaffold for assembling a slab which can perform an assembling work of a formwork and a reinforcing bar in parallel and realize an efficient slab building operation.

Further, a load acting on the form support for the overhang floor slab is transmitted to the main girder to support the main girder, and a floor slab form is provided on the main girder so as not to generate excessive torsional stress. Easily dismantled slabs and ensure safety in work at heights.Efficient slab construction work with both rebar scaffolding and slab formwork movable even with reinforcements and bridge piers in the main girder. It is an object of the present invention to provide a movable scaffold for assembling floor slabs that can realize the above.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a moving scaffold for assembling a floor slab according to the present invention is provided with a pedestal having a moving member on an upper surface which is removably inserted into a stud dowel on an upper surface of a main girder. And a horizontal member that is supported by legs that are movably erected on the pedestal portion and that has a suspension column at the projecting end of the main girder and that is provided with lifting members at appropriate intervals. Member work that can be moved in the bridge axis direction by mounting the work floor between the main girders supported on the members to be detachable and the work floor between the main girders installed on the horizontal girder connecting the main girder and detached from the lifting member After assembling the floor slab reinforcement on the work floor so that it can be supported by the main girder part and the beam material connected to the lower end of the suspended pillar and supporting the overhang work floor,
It is characterized in that it is provided with traction means for moving both work floors prior to installation of the floor slab formwork.

The pedestal includes a leg mounted on the stud dowel, and a plate fixed to the top of the pedestal. A vertical beam mounted on the moving member is provided at a lower end of the leg supporting the horizontal member. The legs of the section are to be detachable from the concrete floor slab after casting. A rolling member or a sliding member is applied to the moving member provided on the plate member to movably support the vertical beam. Further, a rolling member or a sliding member is provided also in a member moving portion provided on the cross beam.

The beam supporting the overhanging work floor may be a cantilever projecting from the lower end of the suspended column, or may be hinged to the suspended column, and the tip may be detached by a lifting member. A configuration that supports as much as possible may be used.

The floor slabs assembled on the main girder work floor and the overhang work floor are reinforced by truss reinforcements or the like, so that they can be supported only by the main girder portions. For this reason, since it does not bend greatly even when the work floor is lowered, the floor slab formwork can be installed under the assembled floor slab.

In addition, the floor slab form is provided with a main girder form form that moves in the bridge axis direction and is fixed at a predetermined position by using the member moving section, and a leg that is movably erected on the pedestal section. A gantry that is supported and has an L-shaped suspension member at an end, and a formwork for an overhanging floor slab that is supported by a shoring installed on the upper surface of the L-shaped suspension member;
A vertical load supporting member for detachably connecting an inner end of the L-shaped hanging member and an upper end of the main girder; a lateral vibration preventing member protruding from the L-shaped hanging member and abutting on the main girder web; It is desirable to provide a configuration in which a compression member is suspended from the formwork between the girders and abuts against the lower end of the main girder.

[0013] A vertical beam to be placed on the moving member is also provided at the lower end of the leg supporting the gantry. For the vertical load supporting member, a jig whose length can be adjusted, such as a lever block, is disposed in the vertical direction as much as possible. For this reason, the load at the time of placing of the formwork for the overhanging slab and the shoring work is largely supported by the L-shaped suspension member and the vertical load supporting member, and the presence of the anti-lateral shake member.
Horizontal movement of the L-shaped suspension member is also suppressed.

[0014] The compression member is composed of a steel die placed between the main girders and a length adjusting member attached thereto, and is configured to be connected to the form between the main girders and move in the bridge axis direction. Keep away from The shape steel is pressed and locked between the lower flanges so that the torsional stress acting on the main girder via the anti-lateral vibration member is not excessive.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a front view of a movable scaffold for assembling a floor slab, FIG. 2 is a side view of the same, FIG. 3 is an enlarged front view of an overhang portion, and FIG. 4 is a cross-sectional view showing a cross section taken along line IV-IV of FIG. A movable scaffold for assembling the floor slab includes a scaffold support 2 movably mounted on the main girder 1, a work floor 3 between main girder and an overhanging work floor 4, and a member mounted on the cross girder 5. It has a part 6.

The scaffolding support base 2 has a horizontal member 10 which is supported by the legs 7 and has hanging columns 8 suspended from the projecting ends on the side of the main girder and provided with elevating members 9 at appropriate intervals. A vertical beam 11 is fixed to the lower end of the leg 7. A pedestal portion 12 for supporting the vertical beam 11
Is provided with a leg portion 14 placed on the stud dowel 13 and a plate 15 fixed to the top thereof, and a moving member 16 provided on the upper surface of the plate 15. For the moving member 16, a rolling material such as a chill tank or a roller is used, or a sliding material such as Teflon is used. Further, a similar rolling member and sliding member are provided on the member moving portion 6 on the cross beam 5.

The leg portion 14 has a tube 14a into which the stud dowel 13 is inserted, and a rod 14b which abuts on the head of the stud dove and supports the load, and is configured to be detachable from the concrete slab after casting. .

The work floor 3 between the main girders is supported by a lifting member 9 such as a chain block so as to be detachable, and has a vertical beam 3a supported by a hanging material 9a such as a chain, and a space between the vertical beam 3a and the upper surface thereof. And a work floor 3c adapted to the shape of the lower surface of the floor slab, and is towed by a tension device such as a winch mounted on the member moving section 6 and set forward in the bridge axis direction.

On the other hand, the overhanging work floor 4 includes a beam 4a connected to the lower end of the suspended pillar 8, and a large pulling member 4b disposed on the upper surface thereof.
And a work floor 4c, and the beam 4a is supported by a lifting member 9a such as a lever block by a lifting member 9a. Further, as shown in FIG. 2, the adjacent suspension columns 8 are connected by braces 8a.

The slab reinforcing bar 17 assembled by the working floors 3 and 4 is reinforced by a truss reinforcing bar or the like, and has a rigidity that can be supported only by the main girder 1. Therefore, even when the work floor is lowered, it does not bend significantly.

After the rebar assembly is completed, the overhanging work floor 4 loosens the bolts and nuts 4 d at the connection with the suspension column 8, and uses the lifting member 9 to open the scaffold. At this time, since the hanging member 9a passes through the ring 9b hung on the stud dowel 13 (see FIG. 4), there is no possibility of interference with the rebar. When the beam 4a is opened to a position parallel to the suspension column 8, the suspension 9
The connection of a is disconnected, and the scaffold support base 2 is moved. In addition,
When moving to the next block and assembling the rebar scaffold, the above procedure is performed in reverse.

When the scaffolding support base 2 is moved, the work floor 3 between the main girders is lowered by the elevating member 9 to be mounted on the member moving part 6, and disengaged from the hanging member 9a. The inter-girder work floor 3 is also pulled by a tension device (not shown). After moving these to the outside of the slab reinforcing bar 17, the slab formwork is installed, and the slab concrete is cast.

As shown in FIG. 5, the beam supporting the overhang work floor is a cantilever 54 projecting from the lower end of the suspension column 58.
a. In this case, the overhang work floor 54 constructs a work floor 54c on a height adjusting member 54b such as a jack, and lowers the work floor 54c when moving.

Next, the floor slab formwork will be described with reference to FIGS. FIG. 6 is a front view of the floor slab form moving device, and FIG. 7 is a side view of the same. The floor slab form includes a main girder form 18 and an overhanging floor slab form 19.
Is used to move in the bridge axis direction and fix at a predetermined position. Also, the formwork 19 for the overhanging floor slab is supported by a shoring installed on the upper surface of the L-shaped suspension member 21 of the formwork base 20, and the formwork base 20 can move on the pedestal portion 12. Are supported by legs 22 standing upright.

The inner end of the L-shaped suspension member 21 and the upper end of the main girder 1 are detachably connected by a vertical load supporting member 23 having a jig whose length can be adjusted such as a lever block. The L-shaped suspension member 21 is provided with an anti-sway member 24 protruding therefrom, and is in contact with the main girder web 1a. Also, formwork 1 between main girder
A compression member 25 is suspended from 8, and is in contact with the flange 1b at the lower end of the main girder. The vertical load supporting member 23 is arranged in the vertical direction as much as possible so that the horizontal force at the time of driving is reduced.

The compression member 25 includes a mold steel 25a disposed between the main girders 1 and a length adjusting member 2 such as a jack attached thereto.
5b, which are arranged side by side in the bridge axis direction to form
8 is fixed to a cloth material 27 suspended from a vertical beam 18a by a suspension member 26. For this reason, it is a structure which can move in the bridge axis direction simultaneously with the main girder formwork 18. The compression member 25 is pressed and locked so that the torsional stress acting on the main girder 1 via the anti-lateral vibration member 24 is not excessive.

The main girder form 18 has a vertical beam 18a placed on the member moving section 6 on the horizontal girder 5, and a jack 18 for height adjustment.
b, large drawing material 18c and floor slab formwork 18d. Similarly, the formwork 19 for the overhang floor slab is also provided on the upper surface of the L-shaped suspension member 21 with the vertical beam 19a, the jack 19b, the large pulling member 19c, and the floor slab form 1
9d.

A vertical beam 28 is fixed to the lower end of the leg 22 of the form stand 20, a horizontal member 29 is bridged on the top, and a column member 30 is erected on the top. By attaching the roof 31, a workable space is constructed even in rainy weather.

[0029] When the blocks of the floor slab form moving device are moved, they are also moved in the bridge axis direction by using a tension device. At the time of movement, the jacks of the form support are contracted, and the vertical load supporting member 23, the lateral run-out is moved. Each of the prevention member 24 and the compression member 25 is separated from the main girder 1.

The movable slab for assembling the slab of the present invention can be applied even if the slab form is other than the slide movable form described above.

[0031]

As described above, the moving scaffold for assembling floor slabs according to the present invention is a member moving section for installing a work floor between main girders on a horizontal girder, and an overhang work floor on the main girder upper surface. Since it was connected to a certain horizontal member and moved individually, and the floor slab reinforcement was supported by the main girder part, both work floors could be moved prior to installation of the floor slab formwork, Since the work of assembling the frame and the rebar can be performed in parallel, the construction period can be significantly reduced. In addition, since the working floor is provided along the main girder, a dedicated reinforcing bar assembly yard can be provided independently irrespective of the conditions of the floor slab installation location. Therefore, a large lifting device for lifting the assembled rebar is not required, which contributes to cost reduction.

Further, since the pedestal portion is provided so as to be removably inserted into the stud dowel, the horizontal member can be moved over the reinforcing bar after the floor slab reinforcing bar is assembled.

In the moving scaffold for assembling the slab reinforcing bar according to the second aspect of the present invention, since the sliding slab type formwork is provided, the formwork can be installed immediately after assembling the reinforcing bar, thereby further shortening the concrete casting cycle. can do. In addition, since the formwork for the overhanging floor slab is configured to be supported by the L-shaped suspension member and the vertical load supporting member, the horizontal load generated at the time of driving is reduced. Further, since the horizontal reaction force is borne by the anti-lateral vibration member and the compression member, no excessive torsional stress is generated in the main girder.

Further, since the floor slab form is locked so as to be movable along the main girder, the form slab can be moved without dismantling the form support for the overhang floor slab, and the work at a high place can be performed safely. Nature can be secured.
In addition, since the formwork for the overhang floor slab is moved using the gantry arranged above the main girder, there is no risk that the pier below the main girder will hinder movement, and each formwork can be separated from the main girder. Therefore, even if a main girder reinforcing material such as a stiffener is interposed, it can be moved.

[Brief description of the drawings]

FIG. 1 is a front view of a movable scaffold for assembling a floor slab.

FIG. 2 is a side view of a moving scaffold for assembling a floor slab.

FIG. 3 is an enlarged front view of a movable scaffold overhang.

FIG. 4 is a sectional view showing a section taken along line IV-IV of FIG. 3;

FIG. 5 is a front view of a moving scaffold overhang according to another embodiment.

FIG. 6 is a front view of the floor slab form moving device.

FIG. 7 is a side view of the floor slab form moving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main girder 2 Scaffolding support stand 3 Main girder work floor 4 Overhang work floor 4a Beam 5 Cross beam 6 Member moving part 7 Leg 8 Suspended pillar 9 Elevating member 10 Horizontal bridge 11 Vertical beam 12 Base 13 Stud dowel 16 Moving member 17 Floor slab

Claims (2)

[Claims] 1. A pedestal portion which is detachably inserted into a stud dowel on an upper surface of a main girder and has a moving member on an upper surface, and a leg supported by a leg standing upright on the pedestal portion so as to be movable. A horizontal member having a suspension pillar at the overhanging end and having a lifting member attached at appropriate intervals, a work floor between main girders detachably supported by the lifting member, and a horizontal girder connecting the main girder. A member moving part that can be mounted on the main girder work floor detached from the elevating member and move in the bridge axis direction, and a beam material that is connected to the lower end of the suspended pillar and supports the overhang work floor A floor slab assembler, characterized in that the slab reinforcement is assembled on a work floor so that it can be supported by a main girder, and then traction means for moving both work floors prior to installation of the floor slab formwork is provided. For moving scaffold. 2. A formwork between main girders which moves in the bridge axis direction and is fixed at a predetermined position by using the member moving portion, and a leg which is movably mounted on the pedestal portion. A base supported by the body and having an L-shaped suspension member at an end, a formwork for an overhanging floor slab supported by a support installed on the upper surface of the L-shaped suspension member, and an L-shaped suspension A vertical load support member that removably connects the inner end of the member and the upper end of the main girder, an anti-sway member that protrudes from the L-shaped suspension member and contacts the main girder web, The movable scaffold for assembling floor slabs according to claim 1, further comprising a compression member that is suspended and abuts on a lower end of the main girder.