JP2003336219A - Felloe-guard construction method for bridge and felloe- guard form used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a felloe-guard construction method, in which the construction period of a felloe-guard construction is shortened while a crack due to the drying shrinkage of concrete is prevented, and felloe-guard forms used therefor. <P>SOLUTION: In the felloe-guard construction method, an embedded bar 90 buried and supported to the outer end section of a main girder 9 in the bridge width direction and exposed to the outside is disposed previously in the bridge longitudinal direction first, felloe-guard bars 5 connected to the embedded bars are arranged while forms 2 in a specified partition containing the embedded bars and the felloe-guard bars are constituted by combining panels 3 and 4 made of precast concrete and connected and fixed to the main girder, and concrete 8 is placed in the forms and unified with the forms, thus forming a felloe guard 1. The felloe-guard forms used therefor are composed of the embedded bars disposed to the main girder, the felloe-guard bars connected to the embedded bars and arranged and the panels made of precast concrete constituting the forms in the specified partition containing the embedded bars and the felloe-guard bars and being connected and fixed to the side end section of the main girder as mentioned above. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a ground cover at a side end in the width direction of a bridge constructed by arranging a plurality of main girders in parallel and a ground cover formwork used therefor. Regarding

[0002]

2. Description of the Related Art The ground cover of a bridge is used to classify traffic of vehicles or pedestrians, and to improve the safety of traffic for pedestrians, etc., in order to improve the safety of passage of pedestrians, etc. ) Is an ancillary structure installed at both outer ends along the bridge length direction (hereinafter referred to as "bridge length direction").

The above ground cover is, for example, a pretend girder and a main girder M.
In the case of the bridge B having g, as shown in FIG. 4 (A), the bridge B is arranged on both outer sides of the main girder Mg in the bridge width direction.
As shown in FIG. 4 (B), the construction of the ground cover K is performed by installing the square members J1 on the lower surface of the main girder Mg using the hanging bolts J2, and connecting the shackle J3, the single pipe J4, the foam tie J5, the separator J6, A plywood J7, a main girder Mg insert Mg1 and the like are combined to form a form J for overcast concrete placement, and then concrete J8 is placed, and after waiting for curing and curing, the form J is dismantled. The cover was being formed.

[0004]

However, the conventional ground covering construction method described above has a problem that it takes a lot of time to assemble and dismantle the formwork and the construction period becomes long.

When the formwork is dismantled after the concrete has been set and hardened, the exposed surface area of the concrete per unit volume of the concrete becomes relatively large because the ground cover has a projecting shape, and the concrete is dried. There is a problem that cracks are likely to occur due to shrinkage.

[0006]

[Purpose] Therefore, the present invention has been made in view of the above problems, and aims to shorten the construction period for construction of the ground cover, and
(EN) Provided are a ground covering construction method and a ground covering formwork used therefor, which prevent cracking due to drying shrinkage of concrete.

[0007]

In order to solve the above-mentioned problems, the method of constructing a bridge ground according to the present invention is carried out as follows. That is, the main girder in the bridge width direction (9)
The embedded muscle (9 that is embedded and supported at the outer end of the
0) is previously arranged in the bridge bridge length direction, and the embedded muscle (9
(0) is connected to the ground reinforcement (5), and the formwork (2) in a predetermined section including the embedded reinforcement (90) and the ground reinforcement (5) is attached to the precast concrete panel (3). 4)
After being connected and fixed to the main girder (9), concrete (8) is placed in the formwork (2) and integrated with the formwork (2) to cover the ground (1). Is formed.

The ground covering form used in the above ground covering method is constructed as follows. That is, the embedding reinforcement (90) embedded and supported at the outer end of the main girder (9) in the width direction of the bridge and exposed to the outside and disposed in the bridge length direction, and the embedding reinforcement (90). The ground striated muscle (5) that is connected and arranged,
And a precast concrete panel (3, 4) that forms a form of a predetermined section including the embedded reinforcement (90) and the ground reinforcement (5) and is connected and fixed to the end of the main girder side. It has a feature.

The reference numerals in parentheses described in the claims and the means for solving the problems mentioned above are the reference numerals attached to the drawings for the purpose of facilitating the understanding of the structure of the invention. Of course, it is not limited to the form on this drawing.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A concrete embodiment of a method for covering a bridge with a bridge according to the present invention and a cloth cover form used for the method will be described below in detail with reference to the drawings.

FIG. 1 is a partially cutaway perspective view showing a bridge of this embodiment, FIG. 2 is a sectional view showing the ground cover of the bridge of this embodiment, and FIG. 3 is a view of this embodiment. A of the ground cover of the bridge
FIG.

The form of the bridge B of this embodiment shown in FIG. 1 relates to a pre-tened girder bridge manufactured by introducing pre-stress into PC steel wire in advance in a factory. The floor slab F is formed by erection on the bridge pier. The ground cover 1 is formed on the upper surface and the side surface with respect to the main girder 9 at the outer end in the width direction.

The construction method of the above ground cover 1 is mainly carried out by the main girder 9
It is composed of a step of connecting and fixing to form a mold 2 and a step of placing concrete 8 on the formed mold 2 and hardening it so as to be integrated with the mold 2.

The formwork 2 includes an embedded muscle 90 which is embedded and supported in advance in a main girder 9 which is arranged at an outer end in the width direction and which is exposed to the upper outside, and a ground reinforcement 5 which is connected to the embedded muscle 90. A predetermined section is connected and fixed to the main girder 9 by combining an inner panel 3 and an outer panel 4 which are precast concrete panels (hereinafter abbreviated as "panels") that have been manufactured in advance by factory production or the like. Is building in this way.

The contact point between the joint between the panels and the concrete 8 to be placed is filled with a sealing material 6 in order to prevent rainwater from entering.

According to the above-mentioned construction method, the ground cover 1 of this embodiment has a form 2 composed of an embedded reinforcement 90, a ground reinforcement 5, and an inner panel 3 and an outer panel 4 which are fixedly connected to the main girder 9. , And the concrete 8 to be placed are constituent elements.

The embedding reinforcement 90 is a reinforcing bar which is embedded in the main girder 9 in advance and exposed to the upper outside so as to be arranged in the bridge length direction. Reinforcing bars arranged so as to be connected to 90, and the ground covering 1 is reinforced by the embedding bars 90 and the ground covering bars 5.

Next, the above-mentioned inner panel 3 is a panel material which is arranged inside and above the main girder 9, and a plurality of ridged ribs 30 having an increased wall thickness are formed in the bridge length direction (book). In the embodiment, two ribs are provided and through ribs (both not shown) are arranged in the rib 30 in the bridge length direction. Further, embedded bolts 31 are arranged on the ribs 30 at predetermined intervals.

The outer panel 4 is a panel material arranged on the outer side surface with respect to the main girder 9, and a plurality of ribs 40 similar to the inner panel 3 are provided on the upper end side at predetermined intervals in the bridge length direction. This formation (three in the present embodiment, including the position facing the rib 30 of the inner panel) is performed, and through-strips (both not shown) are arranged in the rib 40 in the bridge length direction, and embedded bolts are arranged at predetermined intervals. 41 are arranged. Further, on the lower end side of the outer panel 4, a substantially L-shaped draining portion 42 which is horizontally bent in the direction of the main girder 9 is formed.
Is formed. Further, as shown in FIG. 2, a bottom plate 43 is arranged between the draining portion 42 and the side end surface of the main girder 9 so as to close the gap. After mounting the bottom plate 43, the bottom plate 43 is placed so as to be bridged between the upper surface on the tip end side of the water draining section 42 and the shoulder section 92 having a downward slope formed on the lower side end surface of the main girder 9. It is fixed by an adhesive means. In this way, the bottom plate 43 is formed separately from the outer panel 4 and is attached so that the mounting error of the outer panel 4 with respect to the main girder 9 can be absorbed and the rainwater or the like flowing down through the outer panel 4 can be absorbed. This is for the purpose of the draining effect of preventing the transmission of the water to the main girder 9. Note that the abutting surfaces (joints) of the bottom plates 43 that are in contact with each other and are continuous in the longitudinal direction are also filled with the sealing material 6 in the same manner as the joints between the panels described above.

Finally, the inner and outer panels 3 forming the formwork 2,
4 is connected and fixed by embedding bolt 3 between opposing panels.
It is performed by the connecting rod 7 which is hung on the Nos. 1 and 41 and connected and fixed by welding or screwing. In order to connect and fix the above-mentioned form 2 itself to the main girder side end portion, the insert 91 previously arranged on the side end surface of the main girder 9 and the embedding bolt 41 arranged on the outer panel 4 are welded. It is performed by the connecting rod 7 which is connected and fixed by. The bottom plate 43 is arranged so as to be inserted obliquely from the lower side of the outer panel 4 after being fixed to the main girders 9 of the inner and outer panels 3 and 4 and fixed.

[0021]

[Effects] Since the method for constructing a bridge cover of the present invention and the cover formwork used for the bridge cover are constructed as described above, the following effects are obtained.

In other words, since the conventional complicated construction and disassembly of the formwork are omitted, the construction period can be shortened and the cost can be reduced.

Further, since there is no dismantling of the formwork, the dry cracking of concrete which has conventionally occurred is eliminated, and the appearance and strength are improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a bridge according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the ground cover of the bridge according to the present embodiment.

FIG. 3 is a sectional view taken along the line AA of the ground cover of the bridge according to the present embodiment.

FIG. 4 is a cross-sectional view showing a conventional ground cover and a ground cover construction state.

[Explanation of symbols]

1 ground cover 2 formwork 3 inner panel 30 ribs 31 Embedded Bolt 4 outer panel 40 ribs 41 Embedded bolt 42 Drain 43 Bottom plate 5 lichen 6 sealing material 7 connecting rod 8 concrete 9 main girder 90 Embedded muscle 91 Insert 92 Shoulder B bridge F floor slab K ground cover (conventional example) Mg main girder (conventional example) Mg1 insert J formwork J1 square timber J2 hanging bolt J3 pier J4 single tube J5 Form Tie J6 separator J7 plywood J8 concrete

Claims (2)

[Claims] 1. An embedding bar (90) which is embedded and supported at the outer end of the main girder (9) in the bridge width direction and exposed to the outside is arranged in advance in the bridge bridge length direction and the embedding is performed. Precast concrete is used for arranging the ground reinforcement (5) connected to the reinforcement reinforcement (90), and at the same time, the formwork (2) of a predetermined section including the embedded reinforcement (90) and the ground reinforcement (5) is precast concrete. After being constructed by a combination of panels (3, 4) and connected and fixed to the main girder (9), concrete (8) is placed in the form (2) and integrated with the form (2). A method for constructing a ground cover of a bridge, characterized by forming a ground cover (1). 2. An embedding bar (90) which is embedded and supported at the outer end of the main girder (9) in the width direction of the bridge and is exposed to the outside to be disposed in the bridge bridge length direction, and the embedding bar (90). 90) The ground reinforced muscle (5) connected to and reinforced
And a precast concrete panel (3, 4) which forms a formwork of a predetermined section including the embedded reinforcement (90) and the ground reinforcement (5) and is connected and fixed to the end of the main girder (9) side. An underground cover formwork used in a bridge cover method for constructing a bridge.