JP3032476B2 - Moving device for floor slab formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for moving a formwork used for placing concrete in a slab of a steel bridge, and more particularly to an overhanging floor capable of moving a form receiving truss along a main girder. The present invention relates to a floor slab form moving device including a slab form moving unit.

[0002]

2. Description of the Related Art As a conventional apparatus for moving a formwork used when constructing floor slab concrete of a steel bridge, for example, an apparatus described in Japanese Patent Publication No. 50-30931 is known. This conventional mold moving device will be described with reference to FIG. The bridge slab has an intermediate slab 1 between the main girders 101.
02 and an overhanging floor slab 103 projecting to the side of the main girder, the conventional form moving apparatus uses a formwork between main girder 104 and a formwork for overhanging floor slab for constructing these floor slabs. 105 are supported by shoring, and when the block is moved, the members of each set are moved to the main girder form moving section 106 and the overhang floor slab form moving section 1
07 and moved separately in the bridge axis direction.

The main girder form moving section 106 passes a rail 106a on a cross girder 108 connecting the main girder 101, and moves the main girder form 104 to a bogie 106b which can move along the rail.
In this configuration, the form moving unit 107 for an overhang floor has a scaffold truss moving mechanism 109 and a triangular form receiving truss 110 supporting the form 105 for the overhang floor. The scaffold truss moving mechanism 109 attaches a rail 109b extending in the bridge axis direction to a support pillar 109a on an upper flange of the main girder 101, and fixes a support girder 109d longer than a floor slab width to a carriage 109c to be mounted thereon. The scaffold truss 109e is suspended from both ends of the support beam 109d.

The form receiving truss 110 has a structure in which the main girder lower flange 101a and the upper part of the main girder are connected to take a reaction force. The reaction force fulcrum member connected to the upper part of the main girder is a long bolt 111 mounted on the form receiving truss 110, one end of which is attached to the upper part of the main girder, and the other end is fixed to a holding plate 112 provided outside the truss by a nut. It was configured to be detachably fastened.

[0005] When moving the overhang floor slab form support, the support member 113 such as a wedge interposed at the lower end of the truss is removed, and the long bolts 111 are loosened and removed. The frame 105 and the form receiving truss 110 are lowered, and they are moved onto the scaffolding truss 109e, the supporting girder 109d is moved to a predetermined position, and the form receiving truss 110 is again connected to the main girder lower flange 101a and the main girder upper part. And set up the formwork.

[0006]

However, in the process of removing the formwork or truss from the main girder and moving it on the scaffold each time it is moved, and then reattaching it to the main girder, work efficiency cannot be improved, and Since the disassembly and assembly work is repeated, there is also a problem in terms of safety. Further, the receiving pillar 109a constituting the scaffold truss moving mechanism 109 must be cut and repaired after the floor slab is constructed, which is complicated, and may cause water leakage or the like.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and can be moved without dismantling a form support for an overhanging slab, ensuring the safety of work at a high place, and furthermore, post-processing on a slab. It is an object of the present invention to provide a floor slab form moving device that does not include a member that requires a slab. It is another object of the present invention to provide a floor slab form moving device that can move even when a reinforcing member of a main girder or a pier is interposed. Another object of the present invention is to provide a moving device for a floor slab formwork which transmits a load acting on a form support for an overhanging slab to a main girder and supports the same, and does not generate excessive torsional stress in the main girder. And

[0008]

In order to solve the above problems, a form moving unit for an overhanging floor slab in a moving apparatus for a floor slab form of the present invention can move a form receiving truss along a main girder. A truss holding member that locks to the truss, a rolling support member that protrudes from the form receiving truss and abuts the lower flange of the main girder, and transmits the vertical load applied to the form receiving truss during concrete casting to the main girder A vertical load support member that can be separated from the main girder when moving, a horizontal reaction force support member that is connected to the upper horizontal member of the form receiving truss and takes a horizontal reaction force at the top of the main girder when placing concrete, And a compression member disposed between the main girders facing the rolling support member.

The truss holding member is a member for sliding the truss along the main girder while supporting the member load of the form support, and an engaging portion attached to the form receiving truss and a mounting member for the main girder. And a guide portion for supporting the joining portion. For example, when the engaging portion is arranged in parallel with the main girder and used as a long member connecting the plurality of form receiving trusses, and the guide portion is formed as a hook-shaped receiving member provided at an appropriate interval on the main girder upper flange. A rolling member or a sliding member is interposed on the contact surface so that the long member can slide on the receiving member without resistance. Conversely, a configuration in which the guide portion is a long product is also possible. Since the form receiving truss is moved by using the truss holding member arranged above the main girder in this way, there is no possibility that the pier below the main girder will hinder the movement.

The vertical load supporting member is composed of, for example, a plate rotatably supported on a vertical member of the truss and a jack provided at an end thereof. When fixed, the jack is rotated to support a fulcrum near the intersection of the web flange. Is provided. The jack may be pressed against the lower flange, or may be hung from the upper flange. The compressed material is composed of a steel die placed between the main girders and a length adjusting member attached to it, and is configured to be connected to the main girder form moving part and move in the bridge axis direction. Separate. The lower part of the form receiving truss that moves while being supported by the truss holding member is guided by the rolling support member and moves parallel to the main girder lower flange, but at this time the vertical load support member moves to the outside such as web reinforcement Keep it.

The horizontal reaction force of the form receiving truss at the time of concrete casting is taken by the main girder by the horizontal reaction force support member and the rolling support member, but the rolling support is carried out so that the torsional stress of the main girder is not excessive. A compression member is disposed at a position facing the member, and the length adjusting member presses and locks the section steel between the lower flanges.

When the torsional stress is large and the torsion cannot be sufficiently suppressed by the compression member alone, the main girder connects one end of the tensile member to the support beam for the formwork between the main girders and connects the other end to the horizontal reaction force supporting member. Connecting to the upper part, the horizontal reaction force of the truss is taken by the pushing of the compression member and the pulling of the support beam to eliminate the twist of the main girder.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a front view of a floor slab form moving device, and FIGS. 2 to 4 are cross-sectional views taken along line II-II of FIG.
Sectional views showing I-III section and IV-IV section, FIG. 5 and FIG. 6 show an enlarged view of a part a and a b part of FIG. 1 respectively. The deck of the steel bridge includes an intermediate deck 2 located between the main girders 1 and 1 and an overhanging deck 3 protruding to the side of the main girder 1. In addition, the formwork 5 for the overhanging floor slab is supported by the form moving section 6 for main girder and the form moving section 7 for the overhanging floor slab, which also serve as a support. Move in the axial direction.

The inter-main-girder formwork moving section 6 has a rolling support member 9 disposed on a horizontal girder 8 connecting the main girder 1 and 1, a vertical beam 10 is erected thereon, and a height is further raised thereon. The support beams 12 are disposed at appropriate intervals via jacks 11 for adjusting the height of the support beams.
The inter-main-girder formwork 4 is placed on the large pulling material 13 supported by 2.
Here, for example, a chill tank or the like is used for the rolling support member 9, but instead, a configuration using a roller or a sliding plate using a material such as Teflon ( registered trademark ) may be used. The main girder form moving unit 6 is pulled using a pulling device such as a winch set forward in the moving direction.

The form moving unit 7 for the overhang floor slab includes a form receiving truss 16 having a jack 14 and a large pulling material 15 on its upper part, a truss holding member 17 for holding them, and a form receiving truss 1.
6, a rolling support member 18 projecting from the lower part of the main girder 1 and abutting on the lower flange 1a, a vertical load supporting member 19 projecting laterally from the vertical member 16a of the truss, an upper horizontal member 16b of the truss and the main girder. And a horizontal reaction force support member 20 for connecting to the upper part. The form receiving truss 16 is fixed to a building 16d for a scaffold and a roller 16e in addition to the diagonal member 16c to form a scaffold plate 16f.
And a handrail 16g is also erected on the upper part to form a work floor. A compression member 21 is disposed between the main girders 1 and 1 at a position facing the rolling support member 18 with the lower flange 1a of the main girder 1 interposed therebetween.

The truss holding member 17 is a member for sliding the overhanging floor slab form moving portion 7 along the main girder 1 while supporting the member load, and is a member attached to the form receiving truss 16. It has a joint portion 22 and a guide portion 23 attached to the upper flange 1b of the main girder 1. This truss holding member 17
Will be described with reference to FIG.

The engaging portion 22 is a tube projecting from the lower surface of the end of the upper horizontal member 16b, and is disposed in parallel with the main girder 1 and connects a plurality of form receiving trusses 16. The guide portion 23 is a hook-shaped member provided on the main girder upper flange 1b at appropriate intervals, and has an L-shaped metal member 23a fixed to the upper flange 1b, a hanging member 23b fixed to the upper flange 1b by bolting, and a groove-shaped guide portion 23c. Then, a sliding plate 23d such as Teflon is interposed on the contact surface so that the tube material can slide on the groove-shaped guide portion 23c without resistance. Alternatively, a rolling member such as a chill tank or a roller may be interposed. Also, the projecting piece 23 is provided on the suspending member 23b.
The upper horizontal member 16b is connected to the upper part of the main girder by locking the horizontal reaction force supporting member 20 such as a chain.

The vertical load supporting member 19 is provided with the form receiving truss 1.
6 is a member that transmits the vertical load acting on the concrete 6 at the time of placing concrete to the main girder 1 and is separated from the main girder 1 when moving. This will be described in detail with reference to FIG. Vertical load support member 19
Consists of a plate member 19a rotatably supported on the vertical member 16 and a jack 19b provided at an end thereof. When setting the formwork, the jack 19b is located close to the web 1c and the base plate 19c is installed near the intersection of the web flange. Then jack up to distribute and support the load. At this time, since the form receiving truss 16 rises, no vertical load acts on the truss holding member 17.

The compression member 21 has a steel die 21a disposed between the main girders 1 and 1, and a jack 21b attached thereto. 1
It is supported from 0 by the cloth material 21d suspended from the chain 21c.

The horizontal reaction force support member 20, the vertical load support member 19, and the compression member 21 are separated from the main girder 1 when the block moves. This state will be described with reference to FIGS. At the time of moving the formwork, the chain which is the horizontal reaction force supporting member 20 is removed, and the jack 19b is contracted to deposit the load of the formwork support work on the truss holding member 17. Thereafter, the jack 19b is rotated toward the vertical member 16a and moved to the outside of the stiffener 1d. The jack 21b of the compression member 21
Also released.

Next, the procedure for using the moving device for the floor slab form is shown in FIG.
This will be described with reference to FIG. These are front views of the moving device of the floor slab formwork at the time of setting the formwork, assembling the reinforcing bar, after placing the concrete, and at the time of removing the mold. The form moving unit 7 for an overhanging floor slab pulled to a predetermined position by a tension device (not shown) sets the vertical load support member 19, the horizontal reaction force support member 20, and the compression member 21 to be fixed to the main girder 1. , Jack 1
4 is raised, and the formwork 5 for the overhang floor slab is set at a predetermined height. In addition, the main girder form moving unit 6 fixed at a predetermined position also raises the jack 11 to set the main girder form 4 (FIG. 9).

Next, a reinforcing bar 24 is assembled on the formwork (FIG. 1).
0). The rebar 24 may be assembled on a formwork, or may be a block rebar suspended from a ground. Then, after setting the side formwork 25, the floor slab concrete is poured. At this time, the load acting on the form support for the overhanging floor slab is controlled by the vertical load support member 19, the horizontal reaction force support member 20, and the rolling support member 18 to make the main girder 1
The main girder 1 by the action of the horizontal reaction force.
The lower flange is pressed and locked by the compression member 21 so that the torsional stress of the lower flange does not become excessive.

If the reduction of torsional stress cannot be expected with the compression member 21 alone, the tensile member 26 shown by a two-dot chain line in FIG. The force is applied by pushing the compression member 21 and pulling the support beam 12.

After the curing period of the concrete, the side frame 25 is released, and the laterally tightened PC steel 27 is tensioned to introduce prestress (FIG. 11). Then jack 11,14
To remove the formwork from the concrete, remove the horizontal reaction force support member 20, and loosen the vertical load support member 19 and the jacks 19b, 21b of the compression member 21. At this time, the jack 19b is moved away from the main girder 1 to the outside of the stiffener 1d (FIG. 12).

In this state, the load of the form support for the overhanging floor slab is supported by the truss holding member 17. Therefore, when pulled by a tension device (not shown) set forward in the moving direction, the form moving unit 7 for the overhang floor slab easily moves along the main girder 1 while being supported by the truss holding member 17 and the rolling support member 18. Can be.

The form moving unit 7 for the overhang floor slab described above.
The vertical load supporting member 19 is configured to press the jack 19b against the lower flange 1a, but may be configured to be suspended from the upper flange. The embodiment will be described with reference to FIG. In this case, the jack 1 of the vertical load supporting member 119
19b is suspended from a plate material 119c fixed in the vicinity of the web-flange junction of the upper flange 1b with a suspending material 119d such as a steel material. The hanging member 119d is made of a member that can be removed when moving.

[0027]

As described above, the floor slab form moving apparatus of the present invention is provided with a truss holding member and a rolling support member at the form moving section for the overhang floor slab, and mainly uses the form receiving truss. Since it is movably locked along the girder, it can be moved without dismantling the overhanging floor slab form support, and the safety of work at height can be secured. Further, since the moving device of the present invention does not include a member requiring post-processing on the floor slab, the operation can be simplified, and there is no danger of water leakage or the like. In addition, since the form receiving truss is moved by using the truss holding member arranged above the main girder, there is no possibility that the pier below the main girder obstructs the movement. Furthermore, since the vertical load supporting member which can be separated from the main girder is provided, it can be moved even if a main girder reinforcing material such as a stiffener is interposed.

Further, since the compression member is disposed between the main girders facing the rolling support member, the horizontal reaction force at the time of concrete casting can be borne by this member, and excessive torsional stress is applied to the main girder. Does not occur. In addition, the floor slab form moving device according to claim 2 has a structure in which one end of the tension member is connected to the support beam and the other end is connected to the upper part of the main girder connected to the horizontal reaction force support member. The reaction force can be taken by the pushing of the compression member and the pulling of the support beam, and the torsion of the main girder can be eliminated.

[Brief description of the drawings]

FIG. 1 is a front view of a floor slab form moving device.

FIG. 2 is a sectional view showing a II-II section of FIG. 1;

FIG. 3 is a sectional view showing a section taken along line III-III of FIG. 1;

FIG. 4 is a sectional view showing a section taken along line IV-IV of FIG. 1;

FIG. 5 is an enlarged view of a part a in FIG. 1;

FIG. 6 is an enlarged view of a portion b in FIG. 1;

FIG. 7 is a partially enlarged view of the upper portion of the form receiving truss when the block is moved.

FIG. 8 is a partially enlarged view of a lower portion of the form receiving truss when the block is moved.

FIG. 9 is a front view of a floor slab form moving device when the form is set.

FIG. 10 is a front view of a floor slab form moving device during rebar assembly.

FIG. 11 is a front view of a device for moving a floor slab form after concrete is poured.

FIG. 12 is a front view of the moving device of the floor slab form during detachment.

FIG. 13 is a partially enlarged view of a floor slab form moving device according to another embodiment.

FIG. 14 is a front view of a conventional floor slab form moving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main girder 2 Intermediate floor slab 3 Overhang floor slab 4 Main girder formwork 5 Formwork for overhang slab 6 Formwork moving section between main girders 7 Formwork moving section for overhang floor slab 16 Formwork receiving truss 17 Truss holding member 18 Rolling support member 19 Vertical load support member 20 Horizontal reaction force support member 21 Compression member 22 Engagement part 23 Guide part

Claims (2)

(57) [Claims] 1. A main girder formwork for constructing a floor slab between main girder, and a main girder form moving part for moving the main girder form in a bridge axis direction and fixing at a predetermined position. A formwork for overhanging floor slabs for constructing a floor slab that overhangs the side of the main girder, and an overhang floor slab that moves the formwork for overhanging slabs along the main girder and fixedly supports the main girder. In the apparatus for moving a floor slab formwork including a formwork moving section, the formwork moving section for an overhanging slab includes a form receiving truss having a support structure on an upper portion, and the form receiving truss being used as a main girder. A truss holding member that movably locks along the truss, a rolling support member that protrudes from the form receiving truss and abuts the lower flange of the main girder, and a vertical load that acts on the form receiving truss during concrete casting. A vertical load supporting member that can be transmitted to the girder and separated from the main girder when moving,
A horizontal reaction force support member connected to the upper horizontal member of the form receiving truss to take a horizontal reaction force at the time of concrete casting at the upper part of the main girder, and disposed between the main girder facing the rolling support member. A moving device for a floor slab form, comprising: 2. The main-girder formwork moving portion includes a support beam for the main-girder formwork disposed at a position corresponding to the horizontal reaction force support member, and the horizontal reaction force acting on an upper part of the main girder. 2. The apparatus for moving a floor slab form according to claim 1, further comprising a tension member for transmitting the force to the support beam.