JPH0641918A - Support structure of form device for molding bridge and bridge construction method using support structure - Google Patents

Abstract

PURPOSE:To smoothly perform a molding work by disposing plural suspension beam members on a bridge leg along the bridge length direction, fixing both ends of thereof, and hanging a form centering of a form device for molding a bridge with suspension beam members. CONSTITUTION:Plural suspension beam members 18 are disposed along the bridge length direction X in positions corresponding to the space area of poids parts of a bridge 12 to be molded on a bridge pier 10 through support shoes 16 in such a manner that the lower surface 18a thereof is positioned above the lower surface 12a of the bridge 12. Subsequently, the upper ends of chemical anchor rods 20 fixed on the bridge pier 10 are inserted in both ends of the suspension beam member 18 and fixed through take-up devices 22. Subsequently, the form device 32 for molding a bridge is hung through form centerings 30 by hanging rods 24 disposed on the suspension beam member 18. Further, concrete is placed on the form device 32 to mold the bridge 12 with the suspension beam member 18 embedded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a formwork apparatus used when molding a bridge body of a bridge with concrete, and a method for constructing a bridge body using this support structure.

[0002]

2. Description of the Related Art Conventionally, in a bridge having a pier span of about 25 m, a bridge forming mold device is previously installed between the piers, and concrete is poured into the mold device. The bridge is constructed as a superstructure by installing it.

By the way, a molding frame device used when constructing a bridge body as the superstructure is constructed by, for example, assembling a scaffolding device from the ground between bridge piers, and forming a pillow beam and a formwork supporting beam on the scaffolding device. Are supported via formwork supports arranged in a cross girder, or a support bracket is arranged on the upper side of the pier as a substructure and pillow beams and formwork support beams are arranged in a cross girder on this support bracket. It is supported via formwork support.

However, in the former scaffolding device system, the cost, including the number of days for assembling and removing the scaffolding device, is greatly influenced by the terrain on which the bridge is constructed, and the bridge construction may be delayed.

Further, in this type of bridge construction, in general, there are many cases in which the substructure work and the superstructure work are different. Therefore, in the latter support bracket method, there is a substructure work contractor unrelated to the superstructure work. There are various things such as installation work of support brackets being installed, or superstructure contractors having to install support brackets prior to bridge molding work, which complicates the construction procedure and makes construction work not smooth. The problem to be solved was pointed out.

[0006]

Therefore, according to the present invention,
A plurality of suspension beam members are arranged along the bridge length direction on the pier via a support shoe, and the lower surface of the suspension beam member is set to be located above the lower surface of the bridge body to be molded. Both ends of the bridge are fixed to the bridge pier via the fall prevention anchor means, and a bridge structure is constructed by adopting a support structure in which the formwork support of the formwork device for forming the bridge body is suspended by the suspension beam members. The bridge molding work can be performed smoothly regardless of the terrain.

In this case, a chemical anchor rod fixed on the pier can be preferably used as the fall prevention anchor means.

As an alternative, by fixing one end to the suspension beam member and fixing the other end of the rod member that suspends the formwork support to the fall prevention bracket attached to the lower part of the pier, the fall prevention anchor means is provided. It can also be configured.

Further, in concretely constructing the bridge body, a plurality of suspension beam members are arranged on the bridge piers along the bridge length direction through the support trough, and the lower surface of the suspension beam member is molded. Positioning is performed so that it is above the lower surface, then both end sides of this suspension beam member are fixed to the bridge pier by means of anchors for preventing fall, and a frame device for forming a bridge body is formed on the suspension beam member via a frame support work. After suspending the bridge, the bridge body is molded by placing concrete in the bridge forming formwork device, and the bridge body is molded. It is only necessary to remove unnecessary parts of the shoe and the anchor means for preventing the fall.

[0010]

[Operation] According to the bolster support structure according to the present invention, since the bridge forming formwork device is suspended by the suspension beam members arranged on the bridge piers through the formwork support, bridge construction terrain, etc. The bridge construction work can be carried out smoothly because it can be installed appropriately by the superstructure contractor without being affected by the above.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a support structure for a bridge forming mold device according to the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2, the support structure according to the present invention has a bridge body 1 to be molded on a pier 10.
A plurality of suspension beam members 18 are arranged along the bridge length direction X via support troughs 16 at positions corresponding to the separated portions of the void portions 14 in 2. The support shoe 16 is composed of non-shrink mortar, support plate, and H-shaped steel arranged on the pier 10.

Further, in this case, the lower surface 18a of the suspension beam member 18 is set to be located above the lower surface 12a of the bridge body 12 to be molded.

On the other hand, at both ends of the suspension beam member 18, the upper end of the chemical anchor rod 20 which is erected and fixed at a predetermined position on the bridge pier 10 is fixed by means of a tightening tool 22 so that concrete can be poured as described later. It is configured to prevent falls or danger in case of time.

At the end of the suspension beam member 18, a bridge body forming frame device is provided via a frame support 30 composed of pillow beams 26 and support beams 28 arranged in a cross beam shape by a suspension rod 24. Suspend 32.

As an alternative to the fall prevention means at the time of pouring concrete, as shown in FIG. 3, a rod member 34 having one end fixed to the suspension beam member 18 and the form support 30 is suspended. It can also be used, and in this case, the other end of the rod member 34 may be fixed to a fall prevention bracket 36 attached to the lower portion of the pier 10. When this rod member 34 is used, since the lever action can be utilized, the fall prevention bracket 36 can be downsized, and the fall prevention means can be simply configured.

According to the support structure of the present invention having the above-described structure, the superstructure contractor follows the procedure without depending on the terrain on which the bridge is erected, etc. It is possible to simply configure.

On the other hand, in concretely constructing the bridge body 12 using the support structure thus constructed, first,
A plurality of suspension beam members 18 are arranged along the bridge length direction X via support troughs 16 at positions corresponding to the separated portions of the void portions 14 in the bridge body 12 to be molded on the pier 10. In this case, the lower surface 18a of the suspension beam member 18 is set so as to be located above the lower surface 12a of the bridge body 12 to be molded (see FIG. 4a).

Next, the upper ends of the chemical anchor rods 20 which are erected and fixed at predetermined positions on the bridge pier 10 are inserted into both ends of the suspension beam member 18 and fixed through the tightening tool 22 (see FIG. 4b). .

Next, the bridge body forming frame device 32 is suspended by the suspension beam member 18 via the frame support work 30 by the suspension rod 24 arranged on the suspension beam member 18 (see FIG. 4c). .

Then, concrete is cast into the bridge forming mold device 32 to form the bridge 12 with the suspension beam member 18 embedded therein. When the bridge body 12 molded in this way hardens, the formwork around the bearing is removed to perform a tensioning operation, and the remaining formwork device is removed, and then the suspension beam member 1 is removed.
It is only necessary to cut and remove the exposed portion of the support shaft 16 of 8 and the chemical rod 20 as an anchor means for preventing fall (FIG. 4).
d)).

[0022]

As described above, according to the support structure for the bridge forming formwork device of the present invention, the support structure is constructed at the rated cost without being affected by the terrain of the bridge. can do.

Further, since the formwork support work is suspended by the suspension beam member installed on the bridge pier, the superstructure contractor can construct the support structure very easily according to the procedure, so that the bridge work can be smoothly performed. It has various advantages such as being possible.

The preferred embodiment of the support structure for the bridge forming mold device and the method for constructing a bridge using this support structure according to the present invention has been described above, but the present invention is not limited to this embodiment. For example, as shown in FIG. 5, the suspension beam member 18 is arranged on the pier 10 via the H-shaped steel 38 as a spacer, and the chemical rod 20 attached to the H-shaped steel 38 prevents falling. Means, and the bridge body forming frame device 32 is suspended by the suspension rod 24 at the end of the suspension beam member 18 via the frame support 30.
It goes without saying that various modifications can be made without departing from the spirit of the present invention, such as by removing the suspension beam member 18 after the molding of FIG.

[Brief description of drawings]

FIG. 1 is a side view in the bridge length direction showing a preferred embodiment of a support structure for a bridge forming formwork apparatus according to the present invention.

FIG. 2 is an explanatory diagram in a transverse direction between the support structure and the bridge shown in FIG.

FIG. 3 is a side view in the bridge length direction showing another embodiment of the fall prevention anchor means in the support structure shown in FIG.

FIG. 4 is a process explanatory view showing a procedure for constructing a bridge using the support structure of the bridge forming mold device according to the present invention, wherein
Is a state in which the suspension beam member is arranged on the pier, b is a state in which the suspension beam member is provided with a fall prevention means, c is a state in which the bridge forming formwork device is suspended on the suspension beam member, and d is a bridge body. It shows the molded state, respectively.

FIG. 5 is a side view in the bridge length direction showing another embodiment of the support structure for the bridge forming mold device according to the present invention.

[Explanation of symbols]

10 bridge piers, 12 bridge bodies, 14
Void part, 16 support shoe, 18 hanging beam member,
20 anchor rods, 22 tightening tools,
24 suspension rods, 26 pillow beams, 28 support beams,
30 Form support, 34 Rod member, 32
Forming device for bridge formation, 36 Fall prevention bracket,

Claims (4)

[Claims] 1. A plurality of suspension beam members are arranged on a pier along a bridge length direction through a support shoe, and a lower surface of the suspension beam member is set to be located above a lower surface of a bridge body to be molded, On the other hand, both ends of the suspension beam member are fixed to a bridge pier via fall prevention anchor means, and further the frame support of the bridge body forming frame device is suspended by the suspension beam member. Supporting structure for body forming mold device. 2. The support structure for a bridge forming formwork apparatus according to claim 1, wherein a chemical anchor rod fixed on the pier is used as the fall preventing anchor means. 3. The fall prevention anchor means has one end portion fixed to a suspension beam member and the other end portion of a rod member suspending a form supporting work is fixed to a fall prevention bracket attached to a lower portion of a pier. The method for constructing a bridge body according to claim 1, which is configured. 4. A plurality of suspension beam members are arranged on the pier along a bridge length direction through a support trough, and the lower surface of the suspension beam member is positioned so as to be above the lower surface of the bridge body to be molded. After fixing both end sides of this suspension beam member to the bridge pier by the anchor means for tipping prevention and suspending the bridge forming formwork device on the suspension beam member through the form support, Forming a bridge with the suspended beam member buried by placing concrete in the formwork device, and then tensioning after curing the bridge body to remove the support shoe of the suspended beam member and the anchoring means for fall prevention. Bridge construction method characterized by.