JPH11323835A - Corrugated steel plate for bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit decrease in construction cost and the period of work for bridge construction by welding in advance a plate for closing a valley portion of a corrugated shape of corrugated steel plate to the corrugated steel plate as a metal closing plate in order to constitute a concrete form for upper concrete floor slab. SOLUTION: A steel bar 23 arranged in the width direction of a bridge 5 is inserted to a steel bar hole 25 of a corrugated steel plate 3, a steel bar 21 of the corrugated steel plate 3 is jointed by entwining to other steel bars laid inside of an upper floor slab 7 and a lower floor slab 9. Also, an end portion of the corrugated steel plate 3 is overlapped to the end portion of neighboring corrugated steel plate 3, bolt holes 17 formed in these portions are communicated and jointed with bolts. At this time, closing plate 31, reinforcing steel bars 21 or the like are butted with those of the adjoining corrugated steel plate 3 and jointed. Thereafter, work of producing concrete form is carried out but the work can be performed easily because the closing plate 31 is already welded to the corrugated steel plate 3. Thus, the construction cost and the period of work for bridge construction can be decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated steel sheet constituting a side wall of a bridge, and more particularly to a structure of a portion where the corrugated steel sheet is connected to a concrete part.

[0002]

2. Description of the Related Art Generally, the side wall of a bridge is made of concrete (PC). However, since the concrete is heavy and difficult to transport, the side wall 1 (FIG. 2) is used.
(See, for example, Japanese Unexamined Patent Application Publication No. 2000-181572). The corrugated steel sheet 3 is formed so that the corrugation advances in the longitudinal direction of the bridge 5 (the front-rear direction in FIG. 2), and is joined to the adjacent corrugated steel sheet 3 at the longitudinal end and at the end in the vertical direction. Concrete upper slab 7 and concrete lower slab 9
Connect with

At the connection with the concrete upper slab 7, when the concrete is poured, the valley 11 is closed so that the concrete does not leak downward from the corrugated valley 11 (FIG. 9) of the corrugated steel plate 3. A plate 13 is required.
Heretofore, the closing plate 13 has been made by using a plywood as a part of a concrete formwork manufacturing operation performed on site. The gap 15 between the closing plate 13 and the corrugated steel plate 3 was filled with a caulking agent for preventing water leakage.

[0004]

However, using the veneer plate as a material, the closing plate 1 can be accurately adjusted to the shape of the valley portion.
It is difficult to prepare No. 3 even if the gap 15 is filled with a caulking agent, and this increases the construction cost and construction period of the bridge construction.

[0005] In addition, studies have been made on an apparatus for automatically pouring concrete while moving an integral formwork conforming to the cross-sectional shape continuous in the longitudinal direction of the bridge 5 in the longitudinal direction. When the side wall 1 is made of the corrugated steel plate 3, there is a possibility that this device cannot be used. That is, in order for this device to be effective, the longitudinal direction of the bridge 5 must be linear, and the corrugated portion of the corrugated steel plate that is not linear will hinder the longitudinal movement of the formwork.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and reduces the construction cost and construction period of a bridge construction in which the side walls are corrugated steel plates, and thus, while moving the formwork in the longitudinal direction of the bridge. It is an object of the present invention to provide a corrugated steel plate for a bridge, which can also be used for an apparatus for automatically placing concrete.

[0007]

Means for Solving the Problems To achieve the above object, first and second inventions provide a corrugated steel sheet which forms a side wall connecting a concrete upper slab and a lower slab of a bridge. A closing plate for closing the corrugated valley portion of the corrugated steel sheet to form a concrete formwork of the upper floor slab is previously welded (joined by bolt bonding, rivet bonding, or the like) to the corrugated steel sheet as a metal closing plate. It is a corrugated steel plate for a bridge characterized by the above.

According to a third aspect of the present invention, a metal bar straddling the corrugated valley is welded to the corrugated steel plate, and the metal closing plate is welded to the bar and the valley. It is a corrugated steel plate for a bridge, characterized in that it is made.

In a fourth aspect of the present invention, the metal bar material further comprises:
A corrugated steel plate for a bridge, wherein a round bar is used on the front side of the side wall, which is the corrugated steel plate, and an angle iron is used on the back side.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, the corrugated steel plate 3 is for forming the side wall 3 of the bridge 5.
That is, the bridge 5 has a box-shaped cross section in which the concrete upper slab 7 and the concrete lower slab 9 are connected by the left and right side walls 1. An internal cable (not shown) is buried in each floor slab 7, 9 in the longitudinal direction for reinforcement. The inside of the box is divided by a partition (not shown) at various points in the longitudinal direction, and an external cable (not shown) connecting the partitions passes through the inside of the box.

As shown in FIG. 1, each corrugated steel plate 3 is used upright and has a wave shape of approximately two wavelengths which travels in the longitudinal direction of the bridge 5. Have trapezoidal shapes, so that the bottom of the valley and the top of the mountain are flat. In addition, a structure in which the end portion in the traveling direction of the wave, that is, the longitudinal direction has a structure in which it is joined to the adjacent corrugated steel plate 3, and a structure in which the concrete upper slab 7 and the concrete lower slab 9 are connected in the vertical end. Have. That is, the end portion in the longitudinal direction is the flat portion, and the flat portion has a plurality of bolt holes 17.
Are formed, and the bolt holes 17 at the end of the adjacent corrugated steel plate 3 are formed.
And can be joined by bolts 19 (FIG. 4).

On the end face of the end in the up-down direction, a reinforcing bar 21 is provided in the longitudinal direction, one at the valley portion and one at the peak portion, for a total of four.
The book is placed and welded. These reinforcing bars 21 are joined to reinforcing bars arranged inside the concrete upper slab 7 and the concrete lower slab 9. Further, a reinforcing hole 25 through which the reinforcing bar 23 (see FIG. 5) passes is formed at a position inside the end face by a predetermined distance from the end face in the vertical direction. A plurality of the reinforcing holes 25 are formed in a row in the longitudinal direction of the corrugated steel sheet 3.

A bar is welded to the upper end at positions outside and inside the reinforcing hole 25 in parallel with the row of the reinforcing hole 25. As the bar, a steel round bar 27 is used on the front side (outside the reinforcing hole) of the side wall 1 which is the corrugated steel plate 3, and an angle iron 29 is used on the back side (inside the reinforcing hole). These round bars 27 and angle irons 29 are formed in the valley portions 11 of the corrugated steel plate 3.
And the closing plate 31 is disposed in the valley portion 11. One side of the angle iron 29 in the L-shaped cross section is welded in contact with the corrugated steel sheet 3 and the other side is in a horizontal state upward.

The closing plate 31 is a thin steel plate,
7 or the angle iron 29 and the corrugated steel plate 3 are welded.
This welding is performed on the corrugated steel sheet 3 at a part of the upward horizontal side of the L-shaped cross section. These weldings are performed by spot welding used for temporary welding and the like. Then, a caulking agent is filled to fill gaps between the welded portions. The closing plate 31 has 5 pieces on the front and back sides of the corrugated steel sheet 3.
The three plates at the center are symmetrical, and the two plates at both ends have the sides located at the ends of the corrugated steel plate 3 at right angles to the upper side and the lower side.

In the flat portion where the bolt hole 17 is formed at the end of the corrugated steel plate 3, the right portion in FIG. 1 protrudes to the right in the longitudinal direction more than other members for joining. . That is, the right side is the closing plate 3
1, the reinforcing bar 21, the round bar 27, or the angle iron 29 projects further to the right side in the drawing, and thus can be overlapped with the end of the adjacent corrugated steel plate 3. Then, a slit 33 for guiding an end of the corrugated steel plate 3 adjacent to the corrugated steel plate 3 is formed in the closing plate 31 at the right end in the drawing so as not to cause interference of the members when they are overlapped. Further, the round bar 27 at the left end in the figure does not interfere with the end of the corrugated steel plate 3 adjacent on the opposite side,
It is getting shorter.

(Outline of Construction Procedure) First, among the reinforcing bars arranged inside the concrete upper slab 7 and the concrete lower slab 9 before being cast, the reinforcing bar 23 arranged in the width direction of the bridge 5 is used. Is passed through the reinforcing hole 25 of the corrugated steel plate 3. Further, a total of four reinforcing bars 21 of the corrugated steel plate 3 are entangled with other reinforcing bars arranged in the width direction of the bridge 5 among reinforcing bars (not shown) arranged inside the upper slab 7 and the lower slab 9. And joined. Further, the flat portion at the end of the corrugated steel plate 3 is overlapped with the flat portion at the end of the adjacent corrugated steel plate 3, and the bolt holes 17 formed in these flat portions are communicated with each other, and the bolt 19 (FIG. 4) is inserted and joined. At this time, the closing plate 31, the reinforcing bar 21, the round bar 27, and the angle steel 29 are butted and joined to those of the adjacent corrugated steel plate 3. This joining involves welding or the like as necessary.

Thereafter, the work of manufacturing the concrete formwork is performed. However, since the closing plate 31 is already welded to the corrugated steel plate 3, the work is easily performed. Form part of the formwork,
An end of a deck plate 37 (FIG. 3), which is a plate member that supports the lower surface of the concrete upper slab, is supported by an upward horizontal side of the L-shaped cross section of the angle iron 29. On the deck plate 37, for example, foamed polyurethane 39 or the like is processed and placed in a predetermined shape, and a vinyl chloride sheet 41 or the like is laid thereon, and concrete casting is prepared. After the formwork is completed in this way, concrete is poured. Then, after a predetermined curing period has elapsed, the mold is removed.

(Effects of the Embodiment) According to this embodiment, the steel closing plate 31 for closing the corrugated valley portion 11 of the corrugated steel plate 3 is welded in advance at the factory, so that it is possible to perform a conventional Therefore, there is no need to form a closing plate using a plywood material as the material to match the shape of the valley portion 11. The work of making the conventional closing plate is troublesome, and therefore, the work of manufacturing the concrete formwork is complicated, and the corrugated steel plate 3 is attached to the side wall 1 of the bridge 5.
Has been one of the factors that increase the construction cost and the construction period, but such an increase can be avoided by this embodiment. Further, the shape of the valley portion 11 has a curvature for maintaining strength. According to this shape, a steel thin plate is processed by an automatic processing machine at a factory, rather than manually processing a plywood on site. Is easier and more accurate.

Further, since the steel closing plate 31 is welded to the round bar 27 and the angle iron 31 welded across the valley portion 11 and the valley portion 11, the welding strength of the closing plate 31 can be increased. . In addition, due to the presence of the round bar 27 and the angle iron 31, even if the shape of the edge of the closing plate is not so good, the edge is covered and the useless gap is hardly generated.

Conventionally, it was necessary to form a support 43 (FIG. 9) from below to obtain a scaffold for performing work near the corrugated steel plate 3. However, according to the present invention, the welded round bar 27 is required. And the scaffold can be attached to the angle iron 31 so as to hang the scaffold.

Further, since the round bar 27 is used on the front side of the corrugator 3, it is less noticeable from the front side than when, for example, the angle iron 31 is used, so that the appearance is improved.
In addition, since the angle iron 37 is used on the back side, an upward flat surface (horizontal side having an L-shaped cross section) can be increased as compared with the case where the round bar 27 is used, for example, and the lower surface of the concrete upper slab 7 can be used. The supporting deck plate 37 can be easily supported on this flat surface. Therefore, the work of manufacturing the concrete form becomes easier.

(Other Embodiments) In the above embodiment, the round bar 27 or the angle iron 3 is used as a bar for supporting the closing plate 31.
Although 1 is used, in other embodiments, other rods can be used.

In the above embodiment, a bar for supporting the closing plate 31 is used. However, in other embodiments, such a bar is not used, and the closing plate 31 is connected to the valley portion of the corrugated steel plate. It can be attached only by welding.

In the above embodiment, the work of manufacturing the concrete formwork is performed manually by a worker using wood or the like. However, in other embodiments, an automatic device may be used. . In other words, the corrugated steel sheet 3 has a corrugated shape in which the valley portion 11 is closed by welding the steel closing plate 31 and can be kept in a straight line, so that the formwork is moved in the longitudinal direction of the bridge. A device for automatically placing concrete can also be used.

[0025]

As described above, according to the first, second, or third invention, the metal closing plate for closing the corrugated valley portion of the corrugated steel sheet is welded in advance at the factory. Unlike the related art, there is no need to use a plywood as a material on site to accurately form a closing plate according to the shape of the valley portion, thereby reducing the construction cost and construction period of bridge construction. In addition, the corrugated steel sheet has a valley portion that is closed by welding a metal blocking plate and can be kept in a straight line, so that the formwork is automatically moved while moving in the longitudinal direction of the bridge. Equipment for concrete placement can also be used.

According to the second aspect of the present invention, since the metal rod and the metal closing plate are welded over the valley portion and the metal closing plate is welded to the valley portion, the welding strength of the closing plate is reduced. Can be larger. Conventionally, it was necessary to form a support from below in order to obtain a scaffold for performing work near the corrugated steel sheet. However, according to the present invention, the scaffold can be attached to the welded bar and the support can be constructed. It becomes unnecessary.

According to the third aspect of the present invention, since the round bar is used as the bar on the front side, it is less noticeable from the front side than when, for example, an angle iron is used, so that the appearance is improved.
In addition, since the angle bar is used for the bar on the back side, an upward flat surface can be enlarged as compared with, for example, the case of using a round bar, and the plate member of the formwork supporting the lower surface of the concrete upper slab is formed by this flat plate. It becomes easier to support on the surface.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a bridge corrugated steel sheet according to an embodiment of the present invention.

FIG. 2 is a perspective view of a bridge employing the bridge corrugated steel sheet of FIG. 1;

FIG. 3 is an enlarged view of a part III in FIG. 2;

FIG. 4 is a plan view of a main part of FIG. 3;

FIG. 5 is a view for explaining a state in which the corrugated steel plates for a bridge of FIG. 1 are joined to each other and reinforcing bars are arranged.

6 (A) is a front view, FIG. 6 (B) is a right side view of FIG. 1 (A), and FIG. 6 (C) is a left side view of FIG. 1 (A).

FIG. 7D is a rear view of FIG. 6A.

8 (E) is a plan view of FIG. 6 (A). FIG. 8 (F) is a sectional view taken along line FF of FIG. 6 (A). It is a bottom view of FIG. 6 (A).

FIG. 9 is a view for explaining a problem in construction of a conventional corrugated steel plate for a bridge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side wall 3 Corrugated steel plate 5 Bridge 7 Concrete upper slab 9 Concrete lower slab 11 Valley part 13 Closing plate 15 Gap 17 Bolt hole 19 Bolt 21, 23 Reinforcing bar 25 Reinforcing hole 27 Round bar 29 Angle bar 31 Closing plate 33 Slit 37 Deck Plate 39 Polyurethane foam 41 Vinyl chloride sheet

Claims (4)

[Claims] 1. A corrugated steel sheet forming a side wall connecting a concrete upper slab and a lower slab of a bridge, wherein a corrugated valley portion of the corrugated steel sheet is closed to constitute a concrete formwork of the concrete upper slab. A corrugated steel plate for a bridge, wherein the closing plate is previously joined to the corrugated steel plate as a metal closing plate. 2. A corrugated steel plate forming a side wall connecting a concrete upper slab and a lower slab of a bridge, wherein a corrugated valley portion of the corrugated steel plate is closed to form a concrete formwork of the concrete upper slab. A corrugated steel plate for a bridge, wherein the closing plate is welded to the corrugated steel plate in advance as a metal closing plate. 3. A corrugated steel plate is welded to a metal bar straddling the corrugated valley portion, and the metal closing plate is welded to the bar member and the valley portion. The corrugated steel sheet for a bridge according to claim 1 or 2, wherein the corrugated steel sheet is a bridge. 4. The metal rod according to claim 3, wherein a round bar is used on the front side of the side wall, which is the corrugated steel sheet, and an angle iron is used on the back side. Corrugated steel sheet for bridges.